rp-29fa40 service manual fa

8/21/2019 RP-29FA40 Service Manual FA

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website:http://biz.LGservice.com

E-mail:http://www.LGEservice.com/techsup.htm

COLOR TVSERVICE MANUALCHASSIS : FA

MODEL : RP-29FA40-M

RP-29FA40-O

RP-29FA40-PRP-29FA40-R

CAUTIONBEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.


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TABLE OF CONTENTS

TOC -1 FA - TOC

VIDEO PROCESSOR .. 6-11EDGE CONNECTORS CIRCUIT. 6-12AUDIO VIDEO SWITCH. 6-13COMB FILTER CIRCUIT.. 6-14

SECTION 1 GENERAL INFORMATIONPRODUCT SAFETY SERVICING...... i-iiOVERVIEW.... 1-2REMOTE PROGRAMMING...... 1-3 PROGRAMMING THE REMOTES. 1-4 AUTO FIND.. 1-4

CABLE BOX.. 1-4 VOLUME OVERRIDE.. 1-4 AUXILIARY CAPABILITY.. 1-4 UNIVERSAL ERASER 911.. 1-5 PROGRAMMING CODES. 1-6USER MENUS.... 1-7CHANNEL MENU... 1-7PICTURE MENU.... 1-8SOUN MENU..... 1-8LOCK MENU.. 1-9SPECIAL MENU 1-11MISC DISPLAYS 1-12

SECTION 2 FACTORY MENUINSTALLER MENU 2-1

SECTION 3 SERVICING LARGE SIGNAL. 3-1 POWER SUPPLY ALIGNMENT PROCEDURES 3-2 DEFLECTION. 3-3 SMALL SIGNAL. 3-3 SUMMARY OF AUDIO/VIDEO SIGNALS. 3-5 DIGITAL COMB FILTER 3-6 ADJUSTMENT PROCEDURE .. 3-7 IF & AUDIO SERVICING... 3-9

SECTION 4 PARTSMODEL PARTS RP-29FA40.... 4-16

SECTION 5 EXPLODED VIEWSRP-29FA40-M, RP-29FA40-P, RP-29FA40-O,RP-29FA40-M...

5-1

SECTION 6 SCHEMATICSINTERCONNECT DIAGRAM. 6-1POWER SUPPLY. 6-2VELOCITY SACN MOD.... 6-3VIDEO OUTPUT. 6-4

DEFLECTION CIRCUIT... 6-5PWS CIRCUIT... 6-6MICROPROCESSOR ... 6-7KEYBOARD CIRCUIT.. 6-8AUDIO CIRCUIT.... 6-9FRONT JACK CIRCUIT... 6-10VIDEO PROCESSOR .. 6-11


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IMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-visual servicetechnicians.When servicing this product, under no circumstances should the originaldesign be modified or altered without permission from LG ElectronicsCorporation. All components should be replaced only with types identical tothose in the original circuit and their physical location, wiring and lead dressmust conformto original layout upon completion of repairs.

Special components are also used to prevent x-radiation, shock and fire hazard.

These components are indicated by the letter x included in their componentdesignators and are required to maintain safe performance. No deviations areallowed without prior approval by LGElectronics Corporation.

Circuit diagrams may occasionally differ fromthe actual circuit used. This way,implementation of the latest safety and performance improvement changes intothe set is not delayed until the new service literature is printed.

Caution: Do not attempt to modify this product in any way. Never performcustomized installations without manufacturers approval. Unauthorizedmodifications will not only void the warranty, but may lead to property damageor user injury.

Service work should be performed only after you are thoroughly familiar withthese safety checks and servicing guidelines.

Graphic symbols

The exclamation point within an equilateral triangle is intendedto alert the service personnel to important safety information in

the service literature.

The lightning flash with arrowhead symbol within an equilateraltriangle is intended to alert the service personnel to the presenceof noninsulated dangerous voltage that may be of sufficientmagnitude to constitute a risk of electric shock.

The pictorial representation of a fuse and its rating within anequilateral triangle is intended to convey to the service personnelthe following fuse replacement caution notice:CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ALL FUSES WITH THE SAME TYPE AND RATINGAS MARKEDNEAR EACH FUSE.

SERVICE INFORMATIONWhile servicing, use an isolation transformer for protection fromACline shock.

After the original service problem has been corrected, make a check of thefollowing:

FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility of

adjacent component shorts. This is especially important on items transportedto and fromthe repair shop.

2. Verify that all protective devices such as insulators, barriers, covers,shields, strain reliefs, power supply cords, and other hardware have beenreinstalled per the original design. Be sure that the safety purpose of thepolarized line plug has not been defeated.

3. Soldering must be inspected to discover possible cold solder joints,solder splashes, or sharp solder points. Be certain to remove all looseforeign particles.

4. Check for physical evidence of damage or deterioration to parts andcomponents, for frayed leads or damaged insulation (including the ACcord), and replace if necessary.

5. No lead or component should touch a receiving tube or a resistor rated at1 watt or more. Lead tension around protruding metal surfaces must beavoided.

6. After re-assembly of the set, always performan AC leakage test on allexposed metallic parts of the cabinet (the channel selector knobs, antennaterminals, handle and screws) to be sure that set is safe to operate withoutdanger of electrical shock. DONOT USE A LINE ISOLATION TRANSFORMERDURINGTHIS TEST. Use an ACvoltmeter having 5000 ohms per volt or moresensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor,paralleled by .15 mfd 150V ACtype capacitor between a known good earthground (water pipe, conduit, etc.) and the exposed metallic parts, one ata time. Measure the AC voltage across the combination of 1500 ohmresistor and .15mfd capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat ACvoltage measurements for each exposedmetallic part. Voltage measured must not exceed 0.75 volts RMS. Thiscorresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes

a potential shock hazard and must be corrected immediately.

X-RADIATION1. Be sure procedures and instructions to all service personnel cover the

subject of x-radiation. The only potential source of x-rays in current TVreceivers is the picture tube. However, this tube does not emit x-rays whenthe HV is at the factory-specified level. The proper value is given in theapplicable schematic. Operation at higher voltages may cause a failure ofthe picture tube or high-voltage supply and, under certain circumstancesmay produce radiation in excess of desirable levels.

2. Only factory-specified CRT anode connectors must be used.

3. It is essential that the service personnel have available an accurate and

reliable high-voltage meter.

4. When the high-voltage circuitry is operating properly, there is no possibilityof an x-radiation problem. Every time a color chassis is serviced, thebrightness should be run up and down while monitoring the high voltagewith a meter, to be certain that the high voltage does not exceed thespecified value and that it is regulating correctly.

5. When troubleshooting and making test measurements in a product with aproblemof excessively high voltage, avoid being unnecessarily close tothe picture tube and the high voltage power supply. Do not operate theproduct longer than necessary to locate the cause of excessive voltage.

6. Refer to HV, B+, and shutdown adjustment procedures described in theappropriate schematics and diagrams (where used).

IMPLOSION1. All direct view picture tubes are equipped with an integral implosion

protection system; take care to avoid damage during installation.

2. Use only the recommended factory replacement tubes.

TIPS ON PROPER INSTALLATION1. Never install any receiver in a closed-in recess, cubbyhole, or closely

fitting shelf space over, or close to, a heat duct, or in the path of heatedair flow.

2. Avoid conditions of high humidity such as: outdoor patio installationswhere dew is a factor, near steamradiators where steamleakage is a factor,etc.

3. Avoid placement where draperies may obstruct venting. The customershould also avoid the use of decorative scarves or other coverings thatmight obstruct ventilation.

4. Wall- and shelf-mounted installations using a commercial mounting kitmust follow the factory-approved mounting instructions. A product mountedto a shelf or platform must retain its original feet (or the equivalentthickness in spacers) to provide adequate air flow across the bottom. Boltsor screws used for fasteners must not touch any parts or wiring. Performleakage tests on customized installations.

5. Caution customers against mounting a product on a sloping shelf or in atilted position, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart.Caution the customer on the hazards of trying to roll a cart with smallcasters across thresholds or deep pile carpets.

7. Caution customers against using a cart or stand that has not been listedby Underwriters Laboratories, I nc. for use with its specific model oftelevision receiver or generically approved for use with TVs of the same orlarger screen size.

8. Caution customers against using extension cords. Explain that a forest ofextensions, sprouting from a single outlet, can lead to disastrousconsequences to home and family.

PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS

i

A.C. Vol tmeter

1500 OHM

10 WATT

Place this probeon each exposedmetal part.

Good Earth Ground

such as the Water

Pipe, Conduit, etc.

0.15uF


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X-RADATIONTo prevent possible exposure to x-radiation caused by excessiveCRT Anode Voltage, the FA Chassis incorporates a High VoltageShutdown circuit. This circuit senses the level of a flyback pulsefromthe Flyback Transformer representative of the actual highvoltage on the CRT anode. When this level exceeds a predeterminedvoltage, the circuit shuts down the horizontal drive, preventing

further generation of anode voltage. In this condition, the horizontaldrive is latched off for about 5 seconds, after which, restart, isattempted.

SHUTDOWN CIRCUIT OPERATIONThe Shutdown pulse voltage frompin 3 of TX3200 (Flyback Trans-former) is peak detected (rectified bythe action of diode DX3001and capacitor CX3001. This forma DC voltage appearing on CX3representative of the CRT anode voltage (HV) produced by TX3200.This voltage is divided down by precision resistors RX3003 andRX3004. This lower voltage appears on Emitter of QX3001. In theevent the CRT anode voltage become excessive, the voltage inEmitter of QX3001 will be higher than voltage in Base of QX3001(Base voltage is fixed by ZDX3002) and therefore QX3001 enters inconduction mode. Therefore a dc voltage will appear on RX3007

and this voltage will put QX3002 in saturation. A high voltage level(5.66V aprox.) is sent to pin 32 (X-Ray) of video processor IC2200stopping H oscillation and H output (pin 34) becomes low. If theshutdown condition disappears TV set can be turned-on by usingthe on/off button.

PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS

ii

HV SHUTDOWN MEASUREMENT PROCEDURE1. Adjust the beamcurrent to OmA in NTSC mode.2. Apply a variable DCvoltage to pin 10 of the PTD1 connector, from 20 to 0 Vdc, starting at 20 Vdc.3. Slowly decrease supply towards zero.4. Remote DC voltage frompin 10 of PTD1.5. After approximately 5 seconds, verify that the HV must be

reestablished (High Voltage Reset).

HIGH VOLTAGE SHUTDOWN TEST

Before to turn the TV on, and after discharging the CRT, connect ahigh impedance high voltage meter to the CRT anode. Apply avoltage signal froman external power supply through the shutdowntest circuit (see Fig. below). Turn the television on and confirmagood signal is being displayed. Reduce Brightness and Contrastsettings until the picture is well extinguished. Wait until the VideoMenu or display may disappear. Read HV meter, ramping up theexternal power supply from0 to 8 volts, the HV increase until theHigh Voltage shutdown, read the high voltage on the HV meter just

before the voltage start dropping.

1 2

1

2

3

2

1

2

1

2

1

2

1 2

1 21 2

12

1

2

1 2

SHUTDOWN SAFETY CIRCUIT

CRT ANODE HIGH VOLTAGE MEASUREMENT PROCEDUREEach CRT screen has its own safe opreating Anode Voltage andshutdown voltage. Critical Safety components (designated andshutdown voltage. Cristal Safety components (desiganted with a nX in the components desigantor) are designed to operate the CRTat a safe operating . Anode voltage and provide proper shutdownthresholds. If replacement of any ofv these components are deemednecessary, it is important to use original type Zenith replacementcomponents.After a replacement is made, confirmproper Anode voltage using thefollowing precedure.

Measurement of the CRT Anode voltage must be performed whit notvisible raster on the screen and operating at nominal horizontalscanning frecuency 15.734 Khz.After discharging the CRT, connect a high impedance high voltagemeter to the CRT anode. Turn the television on and confirma goodsignal is being displayed. Reduce Brightness and Contrast settingsuntil the picture is well extinguished.Observe the Anode voltage meter reading and compare with thetable for the proper CRT screen size. I f the voltage reading is higherthan the maximum, verify circuit component values and properoperation.

CRT Screen SIZE Nominal Anode Voltage Min. Shutdown Voltage Max. Shutdown Voltage

(KV) (KV) (KV)

27 Flat 30 1.0 Nominal HV+2 36

CRTAnode Voltage


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1-3 FA - REMOTES

MBR3447LG MODEL REMOTE CONTROL

FLASHBK (Flashback)Returns to previous Channel.

POWER

Turns TV On or Off.

MODESelects the remote's mode of operatio

MUTETurns sound Off and Onwhile picture remains.

VOLUME (Left/Right)Increases TVs sound level.

ENTER

Shows Channel/Time, enterschannel, or removes anyon-screen menus.

UP and DOWN ARROWSMoves highlighted bar withinmenu to select an option.

CCDisplays closed caption menu.

TV/VCR SOURCESteps through source options.

SURFTurns Channel Preview On/Off.When on, the Channel Up/Down

keys only Scroll through channelsselected in the Add/Del/Blnk.

CHANNEL (Up/Down)Selects next channel in

TVs memory. Pressand hold to repeat.

NUMBER PAD

Selects channels directly.

MENUDisplays menus for TV

and other options.

LEFT/RIGHT ARROWSChooses and shows the

desired menu option.

A, B, C KeysIn commercial TVs, doesnt

have functionallity.

TIMERDisplays the Sleep Timer menu.Press repeatedly to set desired

TV shut-off time.

QUIT/ (Three Functions Key)It doesnt function in commercial TV.

MBR3447LG

124-00233-P09


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FA - REMOTES 1-4

PROGRAMMING THE REMOTE

If youre using Zenith products, the remote is already

programmed for most common codes: TV=101, VCR=201, CABLE=353, and AUX=401. For other brands, or if

your remote fails to control your Zenith products, youllhave to programthe remote.

After installing the batteries, follow these steps for

each product:

1. Press and hold PRG using a blunt pointed object. Release PRG after the indicator light turns on.

2. Press the device button to be programmed (CATV,

VCR, AUX, or TV).

3. Enter the 3-digit product code fromchart on the next page.

4. Press and release ENTER to save the code.

5. Point the remote at product and press POWER to

test the products operation. If it does not turn on, reprogramremote using a different code.

6. Write the code on the label inside the battery

compartment for future reference.

AUTO FIND

If none of the codes in the code table operate your

equipment, use Auto Find to search for the proper code.

1. Turn on the product you want to operate.

2. Press and hold PRG using a blunt pointed object. Release PRG after the indicator ligth turns on.

3. Press any key to be programmed (CAT, VCR, AUX, or

TV).

4. Enter 000, then press ENTER within two seconds.

Auto Find is active after the indicator light flashes and remains lit.

5. Point the remote at the product.

6. Press and release POWER repeatedly, about once a second, until your products turns off. The indicator light turns off when you press POWER and on when

you release it.

7. Press ENTER immediately to save the code. The indicator light flashes to indicate the code has been

saved.

8. Press POWER to turn On your product.

9. Test your product. If the remote fails to operate

some of the basic functions, use Auto Find again to search for a better code. (Auto Find resumes its search after the last code that was entered and

saved in step 7).

NOTE: I f t he indicator l ight stays on as you press POWER,

Auto Find has tr ied all of t he codes. I f t he product

you want t o cont rol has not t urned off , your

remote wil l not work wit h t hat product. To cancel

Auto Find, press PRG at any t ime duri ng Auto

Find.

CABLE BOX

This remote can control the cable/converter box volumeand muting (instead of the TVs) is available on yourequipment.

1. Programthe cable/coverter box normally.

2. After programming the cable/converter box. Press and hold PRG again using a blunt pointed object. Release PRG after the indicator light turns on.

3. Press and release the device button the cable box is

assigned to.

4.This time, enter the special code 3-9-9 instead of the product code.

5. Press and release ENTER to save.

VOLUME OVERRIDE

These remotes can override TV, VCR, or Video Disk

Player volume functions with an amplifiers volume andmuting.

1. Programthe amplifier normally.2. After programming the amplifier, Press and hold PRG

again using a blunt pointed object. Release PRG after the indicator light turns on.

3. Press and release the device button whose volume control is to be replaced by the amplifier volume

control. For example, pressing TV will operate the amplifiers volume while the remote is in TV mode.

4. This time, enter the special code 4-9-9 instead of

the product code.

5. Press and release ENTER to save.

AUXILIARY CAPABILITY

This remote can control up to seven devices. If theremote has been programmed for four componentsusing the TV, VCR, CABLE, and AUX keys, you may also

programit for up to three additional using AUX+1,AUX+2 and AUX+3

To ProgramAUX+1, AUX+2 AND AUX+3

1. Locate three digit code for product in code table.

2. Press and hold PRG until indicator lights up

3. Press the AUX and 1 simultaneously to select AUX+1.

4. Enter the three-digit code and press ENTER. The indicator light should flash and then turn off to indicate the code has been accepted. If the light stays on, repeat steps 3 and 4 or try a different

code.

5. Repeat steps 2-4 for AUX+2 and AUX+3.

6. Write the codes on the labels inside battery compartment for future reference. Hold down AUX

and press 1,2 or 3 to access AUX+1, +2 or +3 mode.

REMOTE PROGRAMMING


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1-5 FA - REMOTES

UNIVERSAL ERASER 911

To restore the transmitter back to its initial defaultsettings, enter the Programming Mode as usual (byholding PRG until the LED indicator lights), and press 9

1 1, followed by ENTER. The LED indicator will flashthree times to indicate that the transmitter has

returned to its initial default brand codes. UniversalErase will work in any mode.

REMOTE PROGRAMMING (continued)


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PROGRAMMING CODES

FA - REMOTES 1-6

TVs Portland 246,727 SL Marx 326 Sears 936Daewoo 149 ProScan 216,260,266, Sprucer 313 Sharp 441,442

Zenith 101,121,149 282,725 Stargate 326,379 Sherwood 449

152 Quasar 259,295 Standard Comp 335 Hitachi 950

Radio Shack 213,265,730 Teleview 326 JVC 949,954

TV/VCR RCA 216,220,228, Texscan 339,356,371 Kenwood 441,931,948Adventura TV/VCR 154 240,242,249, Tocom 317,318,346 Luxman 930

Daewoo TV/VCR 148 260,266,282, Unika 325,348,362 Magnavox 421,422,433,

Funai TV/VCR 154 283,284,285, Universal 325,358,362 434

Goldstar TV/VCR 153,172 286,287,288, Vid Tech 340 Sony 420,443,444,

Symphonic TV/VCR 154 708,710,711, Video Way 349 445,934

Zenith TV/VCR 150,153,154 725 Viewstar 327,354,355, Soundesign 461,498,901,

172 Realistic 212,213,265, 372 902

730 Zenith HT-2000 353 Sylvania 433

VCRs Saisho 722 Zenith PM 374 Teac 418,419Admiral 261 Salora 297 Technics 432

Akai 292,717,718, Samsung 220,230 SATELLITE Yamaha 414,941,942719,720 Sansui 289,292,709, Alphastar 516 Zenith CD Recor 415

Audio Dynamics 726 726 Chaparral 501,502 Zenith 460,461,498,

Bell + Howell 247 Sanyo 212,247,294 Cheyenne 502 901,902

Broksonic 221,250,255, Scott 243,290,729 Dishnet 515

729 Sears 211,212,213, Drake 503 TUNER/AMPCandle 727 265,274 GE 510,517 Citizen 914

Canon 704 Sharp 261,730 General Instruments 504,505 GE 916

Capeheart 728 Signature 2000 216,219,249 Hitachi 519,520 Goldstar 460,474

Citizen 727 Sony 232,723,724 Hughes Network 514 Hitachi 919

Craig 212 Sylvania 275,297 JVC 518 JVC 908

Curtis Mathes 259,266,725, Tatung 268,292 Macom 314 Kenwood 484727 Teac 268 Magnavox 521 Luxman 467

Daewoo 244,246,248, Teknika 272 Philips 521 Marantz 903,913

254,703,729 Toshiba 213,274,290, PrimeStar 513 Memorex 485

Daytron 246 297 ProScan 510,517 Nad 904

DBX 726 Vector Research 726,727 RCA DSS 373 Nakamichi 493

Electrohome 730 Victor 726 RCA 510,517 Onkyo 471,906

Emerson 203,221,243, Video Concepts 726,727 Realistic 506 Optimus 905

250,293,721, XR - 1000 243 Sierra I 502 Panasonic 912

722,729,730, Yamaha 726 Sierra II 502 Pioneer 470,485,907

731,732 Zenith 201,224,225, Sierra III 502 Proton 910

Fisher 211,212,213, 229 Sony 511 Quasar 912

247,265,274 STS1 507 RCA 909

GE 216,220,266, STS3 508 Sharp 483,917,918

282,701,702, CATV Toshiba 509,512 Sherwood 900725 Allegro 358,362 Uniden 522 Sony 486,489,490,

Go Video 256,262,263, Allegro A-B Switch 361 United 344 491,492

700 Archer 325 Zenith Drake 312,328,330 Soundesign 461,498,901,

Goldstar 253 Century 325 Zenith 351,378,500 902Harman Kardon 296 Citizen 325 Toshiba 915

Hitachi 257,270,273, Comtronic 326 AUDIO - TAPE DECKS Technics 912292,705,706, Everquest 379 Sony 452 Victor 908

707,708 Garrard 325 Zenith 460,461,498,

JC Penney 268,726 GE 367 COMPACT DISC 901,902Jensen 292 Gemini 305,331,338 ADC 940

JVC 224,225,258, General Instrument 304,305,306, ADO 939 DVD Players268,292,299, 307,308,309, Aiwa 938 JVC 965

726 310,318 Akai 937 Mitsubishi 964

Kenwood 268,292,726, Hamlin 302,303,345, Denon 935 Pioneer 963

727 365,366 Dynatech 953 Sony 962

Magnavox 275 Jasco 325 Emerson 952 Toshiba 961

Marantz 267,268,726, Jerrold 304,307,308, Fisher 438,933,951 Zenith 960

727 309,310,318, GE 932

Memorex 212,298 360,363 Goldstar 460

MGA 297,730 Kale Vision 335 Hitachi 950

Mitsubishi 276,277,278, Macom 321 Kenwood 441, 931, 948

279,280,296, Magnavox 327,334 JVC 949, 954

297,730 NSC 335,339,368, Luxman 930

Montgomery Ward 216,219,249, 369,370 Marantz 929,947

291,730 Oak 311,332,342 MCS 928

Multitech 727 Panasonic 313,320 Mitsubishi 927

NEC 267,268,269, Philips 325,327,347, Nakamichi 925,926

281,292,709, 350,352,354, Onkyo 923,924,946

726 355 Optimus 920,921,922

Orion 250 Pioneer 315,343 Panasonic 431,432,945

Panasonic 245,251,259, RCA 341 Philips 421,433,434

713,714,715, Regency 329 Pioneer 431,435,944

716 Samsung 326,335 Quasar 432

Pentax 708,727 Scientific Atlanta 316,323,336, Radio Shack 431,441

Philco 275 337,364 RCA 437,943

Pioneer 210,282,726 Signal 326 Sanyo 438,439


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1-7 FA - MENUS

USER MENUS P221-01524-00

CHANNEL MENUBelow is the Channel Menu for the FA chassis with eachof its options.

EZ PROGRAM

The EZProgramfeature automatically searches for all avail-able channels and marks themas Added so that theymay be accessed via the channel Up/Down key.

M O V E NE X T E X IT

EZ ProgramAdd/Del/SurfEZ ClockCaptionsCaption/TextLanguageSource

CHANNEL

E N T E R

In the EZ Programoption, the current RF input type (OffAir Antenna or Cable TV) is highlighted. Use the Up/Down Arrow keys to change the RF input type.

To start the EZ Program, press the Right Arrow key. If theCable TV input type is selected, the EZ Programroutinewill determine what type of cable systemis present.

Notes: EZ Program clears al l Surf ing channels, whi ch were

added.

Whi le searching f or channels, all keys except for t he

Power key are disabled. This prevents an incompleteEZ Program procedure.

Running t he Auto Program wi ll clear t he factory mode,

if it was act ive. This happens at t he end of t he EZ

Program.

I f t he EZ Program l ine in t he Setup Menu is red, t his

indicates t hat t he module did not pass by Chassis.

When green, t his indi cat es t hat t he module did not

pass by Tracking. When blue, t his indi cat es t hat t he

module did not pass by Programming. To clear this

li ne to whit e, set t he upper ni bble of t he EEPROM

locati on $1FFh t o $B0h.

I f no channels are found t hen the fol lowi ng message

wil l appear: Make sure that the cable/ant. isconnected, and try again.

ADD/DEL/SURF

After running the Auto Program, all channels found bythe Auto Programfeature will be marked Added. How-ever, some of these channels may be scrambled, or un-desired by the customer. The Add/Del/ Surf feature al-lows the customer to selectively mark any channel as

Deleted or Added.To change the status of a channel, press the Up/DownArrow keys.

To change the channel while adding or deleting chan-nels, use the Channel Up/Down keys, or press the de-sired channel digits, followed by the ENTER key. If onlyone channel is present, to change the channel the cus-tomer must use the digit keypad to select a channel.

EZ CLOCK

When the EZ Clock itemis selected, pressing the RightArrow key allows entry into the clock set menu.

Clock Mode Time Set

Manua l

Auto

CLOCK

Manual

M OVEM OVE NEXTNEX T BACKBACKENTERENTER

DAYLIGHT SAVINGS TIME

The customer also has the option of selecting the Day-light Savings Time to be On, Off or Auto using the Left/

Right Arrow keys.CAPTIONS

This feature allows the customer to select: Off, On, or EZwhen Muted options.

To change the status of captions, press the Left/RightArrow key to select either On, Off, or EZ Mute.

CAPTION/TEXT

This feature allows the customer to activate ordesactivate Captions or Text.Pressing the Left/Right Arrow keys sequentially througheach of the following Caption/Text options.Caption 1 Caption 2 Caption 3 Caption 4

Text 1 Text 2 Text 3 Text 4


10/57

USER MENUS P221-01524-00 (continued)

FA - MENUS 1-8

Notes:

When the Text opt ion is selected and a text box

appears, i f t he CC key is pressed, t he Capt ion box

t hat allows sett ing t o On, EZ Mute or Of f wil l appear,

When capt ions are being di splayed, i f one of t he

Volume Up/ Down keys is pressed, t he volume bar wi ll

not appear. When t he Capt ions are not act ivat ed and t he CC key

is pressed, t he Capt ion Box will appear, that allows

choose On, EZ Mut e or Of f .

LANGUAGE

This feature allows the customer to change the menulanguage to English, Spanish or French by pressing theUp/Down Arrow keys.

SOURCE

This feature allows the customer to select: Antenna, RearVideo, Rear-SV, Front Video, or Comp. Video.

PICTURE MENUAll menu items are adjusted with the Left/Right Arrowkeys.

ContrastBrightnessColorTintSharpnessColor TempEZ Picture

PICTURE

M O VE NEX T EXITENTER

CONTRAST

Contrast adjustment has 101 steps (0 to 100).

BRIGHTNESS

The brightness value sent to the video processor is (RfBrt+Customer Brightness) if the source is the RF source, or(AuxBrt +Customer Brightness) if the source is the AUXsource. RfBrt and AuxBrt appears in the factory menu.

COLOR

Color adjustment has 101 steps (0 to 100). The colorvalue sent to the video processor is according to the

next equation and look up table.TINT

Tint Adjustment has 101 steps (0 to 100). A centermark indicates step 50. The tint value sent to the videoprocessor is (customTint +TintOffset)*127

SHARPNESS

Sharpness adjustment has 101 steps (0 to 100).The sharp-ness value is sent to the video processor as (CustomSharpness).

COLOR TEMP

Sets the color temperature. The two settings are COOLand WARM.

EZ PICTURE

This feature allows the customer to maintain 8 separate

Contrasts, Brightness, Color, Tint, Sharpness by settingCustom, Normal, Movie, Digital, Video Game, Sports,Night Time, Weak Signal.

SOUND MENUAll menu items are adjustment with the Left/ Right Arrowkeys.

Bass

TrebleBalanceAudio modeFront SurrEZ Sou ndriteEZ Sound

SOUND

M OV E NE XT E XITEN T ER

BASS

Bass adjustment has 101 steps (0 to 100).

TREBLE

Treble adjustment has 15 steps (0 to 14).

BALANCE

Balance adjustment has 29 steps (0 to 28).

AUDIO MODE

There are three audio modes available: Mono, Stereo, 2nd

Audio/ SAP.If 2ndAudio/SAP is selected, but the current channeldoes not support SAP, then either Stereo or Mono willbe heard.

FRONT SURR

Front Surround can be set ON or Off, regardless of thecurrent Audio Mode setting. However, the Front Sur-round effect can only be heard when the Audio Mode

has been set to Stereo and a Stereo signal is present.When this condition exists, there will be a short mute(200ms) while toggling the Surround On to Off, toembellish Front Surround activation.


11/57

1-9 FA - MENUS


EZ SOUNDRITE

The Sound Rite feature is used to obtain a uniformvol-ume level, particularly while changing channels. TheSound Rite feature can be best demonstrated on a chan-nel with no signal (snow).

EZ SOUNDThe EZ Sound Control has six selections the customercan select. The selections available are: Custom, Normal,Stadium, News, Music and Theater. The Left/Right Arrowkeys may be used to select any of the choices mentioned.

LOCK MENUAs show above, with the Lock Menu on-screen, use theUp/Down arrow to highlight an option Like Content Blk,then press ENTER.Use the Up/Down/Left/Right arrows to select and ad-

just or set the rating for an option. For Sex Scenes forexample , use the FromTV-PG setting. (See the MiniGlossary, Ratings Charts on this and the previous pagefor rating definitions).

Aux SourcesM PAAAge BlockContent BlkCdn. RatingsSet HoursSet PasswordLock On/Of f

LOCK

M O VE NEX T EX ITENTER

AUX SOURCES

To Block or Unblock the sources, press the Up/Down Ar-row keys.

The SOURCE key may be used to view the other source.

MPAA

The MPAA selector allows the customer to select eitherto have the channel Unblocked, G and Above, PG andAbove, PG-13 and Above, R and Above, NC-17 and Above,or X.

AGE BLOCK

Use the Right Arrow key to select the Age Block Menu.Once entered into the Age Block Menu, the customerhas the option to block channels for general age or toblock channels for children.

GENERAL BLOCK

To block channels for a general age, the customer mayeither select: Unblocked, TV-G and Above, TV-PG andAbove, TV-14 and Above or TV-MA.

General UnblockedTV-GTV-PGTV-14TV-MA

AG E

ChildrenGeneral

M OV E NEXT BA CKENTER

CHILDREN BLOCK

To block channels for children, select either: Unblocked,TV-Y and Above or TV-Y7.

CONTENT BLOCK

To block a television programaccording to its content,use the Right Arrow key to select the Content Block Menu.

General UnblockedTV-PGTV-14

CONTENT

LanguageViolenceSex ScenesF ViolenceNo Rating

Dialog

M OV E NEXT BA CKENTER

DIALOG BLOCK

To block a television programwithDialograting, use theUp/Down Arrow keys to select either: Unblocked, TV-PGand Above or TV-14.

LANGUAGE BLOCK

To block a television programwith Language rating, usethe Up/Down Arrow keys to select either: Unblocked,

TV-PG and Above, TV-14 and Above, or TV-MA.

VIOLENCE BLOCK

To block a television programwith Violence rating, usethe Up/Down Arrow keys to select either: Unblocked,


SEX SCENES BLOCK

To block a television program with Sex Scenes rating,use the Up/Down Arrow keys to select either: Unblocked,



12/57


FA - MENUS 1-10

F VIOLENCE BLOCK

To block a television programwithF Violencerating, usethe Up/Down Arrow keys to select either: Unblocked,

TV-Y7.

NO RATING BLOCK

To block a television programwith No Rating , use the

Up/Down Arrow keys to select either: Unblocked andBlocked.

CANADIAN RATINGS

Use the Right Arrow key to select the Content Block,and use the Left/Right Arrow keys to select the Cnd.English or Cdn. French.

General ExemptChildren8+Genera lPG14 +18 +

CDN. RATINGS

Cd. FrenchCdn. English

M O VE NEX T BACKENTER

SET HOURS

Use the Up/Down Arrow keys to adjust the number ofhours the Parental Control feature will be active. Thevalid hour range is 1 through 99 hours.

SET PASSWORD

Press the Right Arrow key to allow Password entry.

TO ENTER PASSWORD

The software accepts four-digit codes only. The cus-tomer must enter a password

REPEAT PASSWORD

After a four-digit code has been entered, the softwarerequires the customer to re-enter the same four-digitcode.

PASSWORD NOT ACCEPTED!

If an invalid code is entered, or the two codes entereddo not match, a blinking error message (Not Accepted!)will appear. This error message also appears when no codeis entered for the password or if only one digit is en-tered and no other digit has been entered.

LOCK ON/OFF

This itemturns the Parental feature On or Off. The Pa-rental Ctrl. feature can only be turned on if the hours >0, and a password has been set. Otherwise the Lock On/Off line will display either of the following error mes-sages: Must Set Hours or Must Set Password.

RE-ENTERING PARENTAL CONTROL MENU

If the Parental Control feature has been activated,the software will not allow immediately entry intothe Parental Control Menu. Instead, it will promptfor the correct password. If the correct pass-word is entered, the Parental Control menu will

be unlocked so the user can change the con-figuration for parental options. If an incorrectpassword is entered, an error message (Not Ac-cepted!) appears, and will not disappear until 5seconds. This extended time provision increasesthe amount of time necessary for a child to crackthe password.Notes:

The Parent al Cont rol menu wil l remain up f or

15 seconds af t er t he last key press.

The QUIT key may be pressed t o remove t he PC

menu.

Ent ry i nt o t he Fact ory Menu wil l immediat ely

t urn off t he PC feature The PC Hours and Password wi l l be cleared

upon exit of t he Parental Ct rl menu (unless

t he Parental Ct rl feature has been turned on.)

DISPLAY WHEN PARENTAL CONTROL IS ACTIVE

When the Parental Control has been activatedthe channel is blocked. The display on the screenshows two lines. The first line displays a mes-sage saying that the PARENTAL LOCKOUT IS AC-

TIVE.The second line displays the amount of time (inhours) left in the lockout.


13/57

1-11 FA - MENUS


SPECIAL MENUThis Menu contains the EZ Timer , Ch. Labels, XDS Dis-play, EZ Demo and EZ Help.

EZ Timer

CH. Labels

XDS Disp lay

EZ De m o

EZ He lp

SPECIAL

M O VE NEXT EX ITENTER

EZ TIMER

The Timer Menu contains the Sleep Timer and the On/OffTimer features.

SLEEP TIMER

Sleep Timer (via Timer Menu)

The Left/Right Arrows can be used to adjust the currentsleep timer setting:Off, 0:10, 0:20, 0:30, 1:00, 1:30, 2:00, 3:00 or 4:00

EZ Timer

CH. Labels

XDS Disp lay

EZ De m o

EZ He lp

PRESS

TO SET

SPECIAL

MOVE NEXT

BACK

EZ Timer

ON/OFF TIMERThis feature consists of three menu lines: On Time,Off Time, and On/Off Timer. This feature allows theset to turn on and off at the times specified in On

Time and Off Time.The On Time and Off Time are set identical to theClock Set feature in the Channel Menu.An Off Time must be specified, before turning on the EZ

Timerotherwise an error message (Must Set On/Off)will be displayed on the On/Off Timer line.

The On/ Off Timer option turns the Timer On or Off.If there is no Off Time set, then the On/Off Timer dis-plays the above message saying: Must Set Off Timer.Once the Off timer has been set, the customer can thenset the option to either On or Off.

CHANNEL LABELS OPTION

This feature allows the customer to select a channel la-bel for the current station. This channel label is dis-played in the Channel/Time display. Initially, all channellabels are set to , which results in no channel be-ing displayed in the Channel/Time display.

A&E CMTV ESPN HSE NOS TBN VC

ABC CNCB ESP2 HSN PBS TELE VCR

ACTS CNN ET IC PLAY TLC VH-1

ADC COM EWTN INSP PTL TMC VISN

AMC CSPN FAM JCN QVC TNN VJN

BCC CSP2 FNN LIFE RDS TNT WB

BET CTN FOX MAX REQ TRAV WGN

BRAV CTV F&V ME/U SC TSN WTBS

CA DIS FX MMT SCFI TVA WWOR

CBC DISC GALA MTV SHOW TWC YTV

CBN E! HBO NBC SIN UPN ----CBS ENC HN NICK TBS USA None

CHANNEL LABELS

To change the current channel label, press the Up/DownArrow key.

To change the channel while adjusting channel labels,use the Channel Up/Down keys, or press the desired chan-nel digits, followed by Enter. (If Channel Up/Down ispressed, the next or previous channel which was markedAdded will appear.)

Note:

When in t he channel label i s select ed , t hen

t he Auto channel label is act ivat ed, i n other words,

t he program aut omati call y t ake t he channel label

of t he signal t hat is send by broadcast ing t hrough

t he XDS service.

I f t he label None is select ed, t he Auto channel label

is disact ivat ed.

XDS DISPLAY

Pressing the Left/Right Arrow Keys allows the customer

to select the XDS Display either On or Off.


14/57


FA - MENUS 1-12

EZ DEMO

The EZ Demo is designed to show-off the icon menusand other icon displays on the sales floor. The EZ Demofeature can be turned On/Off with the Up/Down Arrowkeys.Initially, when the feature is activated, as soon as the

OSD times out, the EZ Demo will start. At this point,pressing any key will temporarily disable the EZ Demo for18 seconds, and if the EZ Demo is working and the Menukey is pressed then the Special Menu will be displayedand the EZ Demo feature will be selected allowing thecustomer to disable it.

Note: The Auto Demo On/ Of f sett ing i s not st ored to t he

EEPROM.

EZ HELP

The special features EZ Help option may be accessed us-ing the Right Arrow key. The EZ Help feature provideshelp on certain options and also provides support forthe EZ Programm, Add/Surf/Del, Degaussing, EZ Pictureand EZ SoundRite features. There is a simple explanationof each options.

The EZ Help has a main screen called EZ Help. This screengives a solution to the most common problems that acustomer may encounter; i.e., To programchannels.

MISC DISPLAYS

SLEEP TIMER

To press the timer key for activate the sleep timer.The user can choose to activate the timer to turn off theTelevision in 10, 20 or 30 minutes or 1, 1:30, 2,3 or 4hours just by clicking on the sleep timer clock.

VOLUME DISPLAY

When the Volume key is pressed, the following displayappears on the screen.

23

CLOSED CAPTIONS

If the CC key is pressed the following displays appears.The customer may change the settings of the Closed Cap-tions to Off, On or EZMute

CHANNEL/TIME/AUDIO DISPLAY

Pressing the ENTER Key allows the customer to displaythe channel, time audio mode as well as information ofthe current programalong with the rating of the pro-gram.

O FF


15/57

FACTORY MENU

2-1 FA - INSTALLERS MENU

SECTION 2

STALLERS MENU

INSTALLERS MENU

Access the Installers Menu by using the remote controlor the keyboard on the front of the set.

With the remote: Press & Hold MENU key until theChannel/Time display appears, then press 9, 8, 7, 6, andENTER.

With 6 button keyboard: Press and hold MENU until theChannel/Time display appears. Simultaneously press theVOLUME UP and CHANNEL DOWN keys.

Notes:

When t he factory mode is set t o 1 , t hen

press 9, 8, 7 , and 6, followed by

ENTER t o access t he Instal lers Menu.

To acces the G2 re-adj ustment mode, press 2 hol d

t he Menu key unt i l t he Channel/ Time display appears,

t hen press 9, 8 , 7, 6, and qui t key.

00 Fact Menu:Use the Select key to select item#00,

which is the first itemin the Installers Menu. TheFactory Mode itemshould always be left off (Zero isoff). When left in this mode, only items from0 to 27are visible. When the factory mode is set to 1, all menu(Audio or Video settings) items will be available. Alsothey will appear on the screen one at a time at the topleft of the screen.

When The Factory Mode is on, the Factory Menu lineappears at the middle of the screen to allow for propersetting of the video.

When the Factory Mode is turned off, all TV functionsare returned to normal. The simbols at the top of the

channel menu icons is removed indicating that theFactory Mode is off. There are 4 ways to turn off theFactory Mode:

1. Change Installers Menu Item00 F Mode to 0.

2. Run Auto Program.

3. Use the Clock Set feature to set the time.

4. Use Factory off IR code.

Notes:

Video Preference Sett ings Inhibi t ed: In the Video

Menu, t he Custom Video Preference sett ings are

inhi bit ed whil e the Fact ory Mode is on and will

NOT be st ored in EEPROM. ( This allows the factoryt o temporaril y change t he sett ings and not st ore

t hem permanent ly.)

01 Preset Px:Used to store the customer menu adjust-ments in the nonvolatile memory of the EAROM. Set-tings for Contrast, Brightness, Color and Tint arestored in this manner. 0 is Customand 1 is Preset.

02 Preset Ax: Saves your custom audio settings

(Bass,treble,balance,audio mode,sound rite,frontsurr,speaker) in nonvolatile memory (not affected bypower loss). Memory status is indicated by a 1 forcustomsettings already stored, or 0 for customset-tings have not been stored.

03 Vert Pos:Sets On Scree Display vertical position. Use

the ADJUST keys.04 Horz Pos:Sets On Screen Display horizontal position.

Use the ADJUST keys.

05 Band/Afc:There are 8 possible settings for this op-tion.

06 Ac on:Allows the TV to turn ON just by applying ACpower. Pressing the ON button is not necessary. Thisis desirable when the TV is plugged into a cable boxor a power outlet controlled by a wall switch. Use ad-

just to select 0 or 1, where 0 is OFF and 1 is ON.

Note: When set t o 1 ( ON) , t he TV does not respond to

ON/ OFF commands from eit her the remot e or t hecont rol panel , and t he SLEEP TIMER i s also

nonfunctional.

07 Feature Level:Set to 1 to see Zenith Code, when setto 0 Private Codes are shown.

08 Trap:Turn On 3.58 MHz internal trap in Video Proces-sor.

09 RF Band PassActivates the Band Pass Filter for RF(Antenna) input

10 RF BRT Set Black Level for RF input (Antenna)

11 Aux BRT Set Black Level for Auxiliar input (Video:Composite & Y/C)

12Yuv BRT Set Black Level for YUV input (ComponentVideo)

13Max BrightSet maximuminternal Brightness Register

14Max Contrast Set maximuminternal Contrast Register

15 Vert Size:Vertical amplitude adjustment Variable infactory menu. Range: 0-127, Initial value: 63.

16 Horz Size:Horizontal amplitude adjustment Variablein factory menu. Range: 0-63, Initial value: 31.

17 Vert Phase: Adjust the Vertical Phase, screen up -down. Range 0-5. Initial value: 0

18 Horz Phase:Adjust the Horizontal Phase, screen left-right. Range: 0-31. Initial value: 32

19 Audio Level:Adjust the composite audio level aoutputof the video processor.

20 RF AGC: Adjust the AGC delay for maximumgain witha reference level of 0 dBmV.


16/57

FACTORY MENU (continued)

FA - MENUS 2-2

21 Horz AFC:Set the automatic horizontal frecuency con-trol on, should be 1.

22 WPL: Activates White Peak Limiter

23 Tint Offset: Set the Tint offset

24Red Cut:Set the Red Cutoff of Low Luminance WhiteBalance adjustment

25Green Cut:Set the Green Cutoff of Low LuminanceWhite Balance adjustment

26Blue Cut:Set the Blue Cutoff of Low Luminance WhiteBalance adjustment

27Green Gain:Set the Green Gain of High LuminanceWhite Balance adjustment

28Blue Gain:Set the Blue Gain of High Luminance WhiteBalance adjustment

29Air AFT: Set the AFT when watching air signal.

30 A ATT:Adjust the composite input level to the audiodecoder to have the standard input level.

31 A VCO: Adjust Stereo VCO and SAP VCO free runningfrequency.

32 A Filter:Adjust the filter for Stereo, SAP and DBX.

33 A Spectral: Adjust high frequency stereo separation(3KHz.)

34 Wide Band: Adjust low frequency stereo separation(300Hz.)

35 Max Blk. Hrs: Adjust the maximun number of hoursthe TV can remain Blocked (even 99 hours)

36RGB Contrast:Set OSD Contrast level

37SUB Contrast: Set internal Sub-Contrast Register

38 EWCorrect: East- West Correction. Range 0-63, Ini-tial value:26

39 EWTop-CorrEast-West Corner Correction (top). Range0-31, Initial value: 14

40 EWBott-Corr:East-West Corner Correction (bottom).Range 0-31, Initial value: 23

41 EWTrap-Corr: East-West TrapeziumCorrection.Range0-63. Initial value 30. Range 0-31, Initial value: 23

42 V Centering: Vertical Centering. Range 0-63. Initialvalue: 30

43 V Linearity: Vertical Linearity. Range 0-15. Initialvalue: 12

44 V S-Corr: Vertical S-Correction. Range 0-15. Initialvalue: 11

45 H EHT Comp: Horizontal Extremely High TensionCompesation. Range 0-7. Initial value: 4

46 V EHT Comp: Vertical Extremely High TensionCompesation. Range 0-7. Initial value: 6

47DC RestSet the DC Restoration level

48BLK StretchSet the Black Stretch start point

49ABL GainSet the Automatic Black Level Gain

50SVMGAINAdjust the Scan Velocity Modulator gain

51SVMPHAdjust the Scan Velocity Modulator Phase

52ACB SWActivates Automatic Control Beam

53SHARP PFSharpness peak frequency selection: 0 to3.2 MHz and 1 to 4.0 MHz

54CORINGActivates the enhancement of Sharpness from1 to 2 MHz

55B-Y ATTSet the attenuation level of Cb of YUV signal

56R-Y ATTSet the attenuation level of Cr of YUV signal

57AUTO FLESHActivates the Flesh tone control

58 ABL START POINTSet the Automatic Black Level StartPoint

59Y GAMMASet the non-linear Gamma curve for Lumi-nance signal

60ACB PULSEP Set Automatic Control BeamStart Point

61SCREENNot used

62AKB SETUPMute the RGB Cathodes

63AUX BAND PASSActivates the Band Pass Filter forAuxiliar (Composite, Y/C, YUV) input

64CD MATRIXSet the relative phase and amplitude ofColor response to demodulate de Chroma

65YCbCrSelect the Demodulation Systemfor ComponentVideo YUV or YCbCr

66C GAMMASwitch the Color Gamma


17/57

3-1 FA - SERVICING

SERVICING

LARGE SIGNAL

POWER SUPPLY

The FA is a COLD chassis of a single sided circuit board,developed for a 27. The power supply section featuresfour ICs for voltages sources. The FA chassis has the

capability to meet the Energy Star requirement for alow power consumption on stand-by mode.

9Volts, 1Amp ON/OFF Switch Regulator, 221-01460-07 5Volts, 1Amp ON/OFF Switch Regulator, 221-01460-03 5Volts, 0.150 Amp Switch Linear Regulator, 0IKE780500P Main regulator for Horizontal Deflection (B+), +15V, Switch mode regulator 223-00061-01. Error amplifier 221-00265-03A.

B+

+VAUD

+16VSB

LINEFILTER

SWITCHINGHYBRID IC

RECTIFERSECTION

OPTODEVICE

PWR CTRL

+5VSBF

STEREOSWITCH &VOL-

ST AUDIO

SWEEPTRANSFORME

+VAUD@1400mA

+130V@900mA

HV

6.3Vrms

-14VSW

+35VSW

+12~14VSW

+9VSW

+9VSW@55mA

VIDEOPROCESSOR

+9VSW@120mA

+5VSW@70mA

MICROPROCESSO +5VSBF@27mA

TUNER

+33VSW

+33VSW@15mA+5VSW@100mA

VERTICALDEFLECTION

-14VSW@

HORIZONTALDRIVE

+15VSB@100mA

AC LINE

FILAMENT

6.3Vrms@315mA

SHUNT

REGULATOR

+5VSB

MPI

+5VSB@2mA

+5VSW

+9VSW@5mA

COMB FILTER

+5VSW@80mA

+9VSW@50mA

SWITCHERCXA2089S+9VSW@70mA

+21VL

+12VSB@600mA

+14VSW@

205VSW

ABL

+12VUP

LSPPROTECTION

SWITCH MODE REGULATOR

The FA chassis employs a switching power supply, quasi-resonant topology type. The AC line is supplied thruthe bridge rectifier BRX3400 and CX3410 circuit throughthe fuse FX3400 ( 5A @ 250 V fast blow), The AC opera-

tion range is between 90 Vrms to 135 Vrms ( see TABLE1.1)and a filter, consisting of LX3400, LX3401, CX3401,CX3403 and CX3408, which is employed before the rec-tifier circuit to reduce noise fromthe AC line and viceversa ( EMI ).

The voltage output of the rectifier, VDC, is supplied tothe Switch Mode Regulator Power Supply, and its out-put should be in this range [127 VDC to 352.5 VDC].

The SMPS consisting of ICX3612, ICX3701, ICX3702 andthe chopper transformer TX3600. Through 100 KOHMresistor (Rst), RX3601 and CX3604 (Cst), which is de-rived the VCC fromCX3410. These feed the pin 3 into

the internal zener diode located within ICX3612.

POWER SUPPLY BLOCK SCHEMATIC


18/57

SERVICING (continued)

FA - SERVICING 3-2

At the same time this voltage is also applied to an inter-nal comparator. So the voltage of this power source mustbe within a set range, between a 5VDC reference (Vref)and a 32VDC zener diode(Vz).

This set range is verified through the UVLO(Under Volt -age Lock Out )circuit of the Switch Power IC.

START UPWhen the VCC reaches a upper threshold voltage ( 15VDC) the comparator switches to enable the ICX3612including all internal bias circuits, control circuits, PWMmodulator & Power MOSFET.Due the demand of energy fromCst and Rst the VCC volt-age starts to fall. Before to fall too low, a bootstrapwinding on the power transformer (pins 13 & 16) reforcesadequately the VCC power to keep the full systemopera-tion.

VOLTAGE SOURCES

There are Five secondary windings on the TX3600 andeach has its own half wave rectifier.Consequently there are Five stand-by DC voltages: B+,24VAUD, 21VL, 16VSB & 12VUP.

The first is used to source the horizontal sweep circuit,HOT (Horizontal Output Transistor). The second is usedfor audio. The third is exclusively for the LSP source,which is always on stand-by. The four is used for videolow signal processing and The fifth is used formicrocontroller.

The main microprocessor IC6000 and the EAROM memory

IC6001 are supplied by a five volts stand-by source,+5V SB, which is derived through ICX3820 (0IKE78500P).

The +16 VSB and +12 VUP volts stand-by are protectedby fuses FX3613 and FX3614 ( 4A @ 125V) Very FastActing, the +21VL and +24 VAUD volts stand-by are pro-tected by fuses FX3611 and FX3612 ( 4A @ 125V) SlowBlow. B+ as mentioned before are protected by the OCPcircuit. So they do not need fuse.

The FA chassis can be turn it on with the keyboard onthe front of the set or with the remote hand control.

The microcontroller IC6000 receive a signal and it out-put a high, about 4.8V, on pin 32 which is called PWR-CTL. This pin is connected to RX3832, RX3831 andRX3540; producing the +VAUD, +9VSW, +5VSW.

DEGAUSSING

The FA chassis employs a new method of degaussing,which is performed through software. The IC6000 gen-erate a pulse of about 1 second, time fixed, on pin 43.

This pin is set to high, about 4.8 VDC, through R3900,4.7K 5% watt. And it applies to Q3900, which drivesthe 12 VCD relay KX3900. So the degaussing is performedwhen the degauss coil is plugged to CN3T8 connector.

POWER SUPPLY ALIGNMENT PROCEDURES

ELECTRICAL ADJUSTMENT

The FA chassis SMPS does not need any manual measure-ment. All the output voltages are regulated throughICX3702( 221-265-03A), error amplifier. The ICX3702keeps the regulation using a reference voltage, througha voltage divider. The voltage divider is formed by twoprecision RX3706 and RX3704.

The values of these resistors depends of the B+outputvoltage.

NOTES:

When servi cing make sure to use a 120 VAC- 60Hz 25

Amp isolat ed source.

Use a ful l whit e fi eld on the video pat t ern generator.

PIN DESCRIPTIONPIN # DESCRIPTION FUNCTION1 POWER MOSFET DRAIN To drive the chopper xfmr,capable of switching a max of 650V.

2 GROUND(HOT) MOSFET Source connection.

3 DRIVE (+VCC) Positive supply voltage, 32VDC

4 FEEDBACK (Vfb The output voltage error is applied to this pin.5 SYNCHRONY (Vs/ s External sync signal & Soft star capacitor.


19/57

3-3 FA - SERVICING

SERVICING

DEFLECTION

HORIZONTAL

PINCUSHION CORRECTION CIRCUIT

This circuitry provides a east/west pincushion correc-tion by providing a smaller horizontal deflection current

at the upper and lower portions of the flat screen, thruthe dual OP-AMP IC3300 . In addition, the overall hori-zontal width is adjusted using this circuit.

SHUTDOWN CIRCUIT

This shuthdown circuit operates by means of a sample ofHV taken frompin 3 of the sweep transformer TX3200.

This sample of voltage is rectified, filtered and then com-pared with a reference voltage (fixed by ZDX3002) bythe transistor QX3001. When the HV reaches the maxi-mumpermitted voltage, the transistor QX3001 enters inconduction mode; like consequence the transistor QX3002

also enters in conduction too, switching a DC voltageon pin 32 of IC2200.When IC2200 receives this DC voltage, the X-ray protec-tion is activated and the TV set is shutting off.

VERTICAL

The FA chassis uses a 221-01410 on ICX2100, whichcontains; On-chip Thermal Protection, Pump-Up Stageand Power Amplifier. The vertical drives comes frompins13 & 14 from the video processor IC2200, which are anegative and positive vertical Ramps. The Output tothe yoke is on PIN 2 of ICX2100 . Dual power supply isneeded for this IC (+/- 14Vdc), Applied on pins 6 & 1

respectively.

SMALL SIGNAL

AUDIO & VIDEO PROCESSING

The FA chassis has a stereo amplifier, IC800 P221-1488,

which is the final audio stage. This chassis does nothave phone output, however it has Matrix Output. TheMatrix output is used to connect a center speaker, inserial with the two stereo speakers. This feature is usedto connect an additional 8 Ohm10Wspeaker.

The stereo amplifier provides an power output of 10Wx2. The IC1400, 221-01127 is the audio processor andprovides the Bass, Treble, Balance, front surround andsoundrite features, this IC is controlled thru the IIC bus.

AUDIO

AMPLIF

Output

IC6000

IC800

TDA7263

Hard

L

R OUTPUT

REAR

JACK -

Output R

L

R INPUT

IC1400

CXA2054S

19

RV1

LV

FRONT

JACK-

I C2

A/V

SWITC

IC2900CXA2089S

RV3

LV

Comp. Audio In

7

6

AUX1-

AUX1-

R

L39

40

47

45

SVin R L

V R L

SVout

SVin

22

24

8

10

1

5

10

83

AUX2-R

AUX2-41

42

Matrix-

RV2

LV15

17

RV4

LV

I C2

28

30Pb R LPr

V R LY

17

VIDEO PROCESSING

The IC2200, P221-01519 or TB1253AN/N is a TV SignalProcessor IC, which contains PIF,SIF, Video, Chromaand deflection signal processors for NTSC systems. Also,it has V and EWgeometric correction Outputs.

FeaturesIF Stage.

Inter-carrier input.Digital AFT

Tank coil less PIF VCOAdjustment FreeVideo Stage

Built-in AV SwitchVideo monitor Output for CCD MCUBuilt in chroma trapBlack stretcher, DL Aperture ControlScan Velocity Modulation output.


20/57


FA - SERVICING 3-4

During the introduction of FA chassis the TA1253AN version was introduced, which is an upgrade fromthe Nversion, the following is a comparison of both processors:

The IC2200 receives the video signal fromthe A/V switchIC2990, P221-01438, which is switching the video sig-nals fromthe Front and Rear jacks. Also involved is the

digital comb filter IC2400, 221-01449. The YUV inputis processing directly through the IC2200. The ABL cir-cuit employed has been adjusted to allow to the IC2200a maximumpermissible Cathode current of 1.8 mA.

Data

TB1253AN

Specifications

ITEM TB1253N

PIF block

- < Improve>

- -

Y white --> black ringing

PIF horizontal noise

AFT defeat (" IF lock" detection)920 KHz beat

H VCO temperature drift

V-S correction

Color Gain

Auto flesh control range

H output re-start frequency

V skew performance

Read Bus "V lock", "VP"

V wide BLK1 specification

V centering variable range

"H lock" detection

10 degree

OK Below Y 100%

CHROMA block

38dB

+100KHz

Y block

OK Below Y 130%

TINT control center shift

C-TRAP fo shift

Y linearity

-

"Vlock"

+/-20%

EVEN: 9/8.5H, ODD 8.5/8H

(upper/lower)

+/-25%

45dB

below +20KHz

below 3degree

"Lock-in" by Hsync 16 counts

14.7 KHz

Asyncronous

1.9 Hz/mV

-

0.62 Vp-p

1

0.86 Vp-p

2 dB UP

(narrow)

TEXT block

(wide)

CR input D range

15.7KHz

Stop when low lwvwl

2.5 Hz/mV

DEF block

H output stop timing

H AFC sensitivity

< Improve >

20%/-12%

EVEN: 9/9.5H, ODD 8.5/9H

(upper/lower)

+/-22%

"Lock-out" by no Hsync 56 counts

-

"VP"


21/57

3-5 FA - SERVICING

SERVICING

Y / C l oop

C tr l

C

RT

Y

o

k

e

CrC b R i L i

Rii

Y/

Ci

Li

Y/

Co

M

o

R i L i

V f L f R f Y/

Cf

YM

ainSw

SUMMARY OF AUDIO/VIDEO SIGNALS

REAR JACK PACK:

YUV +LR Input (Component Video) directly troughVideo Proc

Y/C +LR Input (Rear SVideo)CV +LR Input (R Video)

Y/C loop +Matrix Output

FRONT JACK PACK:

Y/C or CV +LR Input (Front SVideo/Video)

CXA2089S SONY IC

48 pins DIP package with 9 DC VccIt drives 3 Y/C+LR and 3 CV+LR input, plus Y/C output

3 CV cross trough Comb filter and come back like Y/C


22/57


FA - SERVICING 3-6

DIGITAL COMB FILTER

The IC2400 is the digital comb filter for NTSC-U formatit is a 1H, 2L Digital comb filter.It separates luminance (Y) and chrominance (C) signalsfromNTSC systemcomposite video signal by using 2

horizontal (H) lines and delaying 1horizontal line onmemory.

This logical comb filter reduce color dot interferenceand realizes high performance Y/C separation.

COMB FILTER CRITICAL SIGNAL

On the Pin 10 (Fsc) color sub carrier signal tuned to3.58 Mhz for chrominance and luminance separation.If this signal is not present the next problems couldbe happened:

a) Color flickerb) Chroma beatc) Luminance signal noise

1

2

1

VIDEO OUTPUT

The RGB signals are applied to the IC5100, which is thevideo RGB output.IC5100 is triple Amplifier with fix gain equal to 51, op-erating at 9 Mhz of Bandwidth with small signal. It usesone +Vcc equal or less of 200 DC Volts. AKB option isnot used for this model.

Using LR array the output is connected to its respectiveCathode

SCAN VELOCITY MODULATOR

This signal comes from directly from Video ProcessorIC2200.

Three stages for signal are:

1: Class A NPN Amplifier2: Complementary symmetry Driver

3: Complementary symmetry output Amp Impedance coupling network connects to SVM coil in CRT assembly.

YUV SWITCH PROVISION

FA chassis also has a provision to support an additionalYUV input thru IC2902, 74HC4053AP,but this is only aprovision. This IC is a 6x3 DEMUX controlled by controlsignal sent by IC6000, MICOM. The outputs point torear jacks YUV (Normally Closed inputs).


23/57

3-7 FA - SERVICING

SERVICING

ADJUSTMENT PROCEDURE

SCOPE:

After change CPT or chassis make next arrangements.1. Initial Upload.

Menu Register name ValueCustomer Customer Contrast 0Customer Customer Brightness 50

Factory RF Brightness 41

Factory Aux Brightness 41

Factory YUV Brightness 41

Factory Max Contrast 110

Factory Max Brightness 36

Factory Sub Contrast 6

Customer Color Temp Cool

Factory Red Cutoff 0

Factory Green Cutoff 0

Factory Blue Cutoff 0

Factory Green Gain 63

Factory Blue Gain 60

Customer Color Temp Warm

Factory Red Cutoff 0

Factory Green Cutoff 0

Factory Blue Cutoff 0

Factory Green Gain 63

Factory Blue Gain 51

G2 (SCREEN) ADJUSTMENT

a) Set Chromatics as Normalb) Set Customer Contrast at 0c) Set Customer Brightness at 15d) Set any channel without RF signale) Push key at remote control until it display channel labelf) Push to display Horizontal Line (it will remain by 3 minutes)g) Turn G2 control at Sweep (FBT) in clock wise to make noticeable the line and after turn counter clock wise to make it lightly visible.h) Push to exiti) Set again Normal Chromatic and available channel

WHITE BALANCE ADJUSTMENT

a) Set any video source without signal (channel label will remain)b) Set Chromatics asNormalc) Set Customer Brightness at 85d) Observe what color is most noticeable: Red, Green or

Bluee) Push to enter at Factory menu; change the value FACT MENU (register #0) from0 to 1 to get at all registers.f) Charge into the Factory registers from24 to 28 the respective values looking into the tables of Cool & Warm.

Cool Color Temp values:x =0.282 +/- 0.008, y =0.288 +/- 0.008, T =10,000 K +/- 1000

CPT

Response

#24 Red

Cutoff

#25 Green

Cutoff

#26 Blue

Cutoff

#27 Green

Gain

#28 Blue

Gain

Red 0 30 14 63 60

Green 30 0 21 64 60Blue 37 38 0 62 60

WARM Color Temp values:x =0.295 +/-0.008, y =0.305+/-0.008, T =8,000K +/- 1000

CPT

Response

#24 Red

Cutoff

#25 Green

Cutoff

#26 Blue

Cutoff

#27 Green

Gain

#28 Blue

Gain

Red 0 31 14 63 53

Green 33 0 21 62 50

Blue 42 39 0 63 53

RF SUB-BRIGHTNESS ADJUSTMENT

a) Set LG 10 Step pattern.0 1 2 3 4 5 6 7 8 9


24/57


FA - SERVICING 3-8

EZ PICTURE VALUES FOR VIDEO PROCESSOR

a) If it necessary to review the values of Chromatics for each EZ Picture, next tables have entire description.

b) Check the Video Processor IC type: TB1253N uses Tint Offset register at 5; and TB1253AN uses Tint Offset register at 0.

Tint offset will be " 5 "

RF, CV & Y/C Sources

Controls Normal Movie Digital Video Game Sport Night Time Weak Signal

Contrast 100 70 100 67 80 27 67

Brightness 50 57 60 57 35 70 54

Color 65 60 65 55 57 62 59

Tint 0 0 0 2R 4G 0 0

Sharpness 85 85 100 77 80 80 40

Color Temp Cool Warm Cool Cool Cool Warm Cool

YUV Source

Controls Normal Movie Digital Video Game Sport Night Time Weak SignalContrast 100 70 100 67 80 27 67

Brightness 50 57 60 57 35 70 54

Color 65 60 65 55 60 59 64

Tint 0 0 0 2R 4G 0 0

Sharpness 85 85 100 77 80 80 40


Tint offset will be " 0 "

RF, CV & Y/C Sources


Contrast 100 70 100 67 80 27 67

Brightness 50 57 60 57 35 70 54

Color 50 50 53 45 46 50 51

Tint 0 0 0 2R 4G 0 0

Sharpness 85 85 100 77 80 80 40


YUV Source


Contrast 100 70 100 67 80 27 67

Brightness 50 57 60 57 35 70 54

Color 47 47 50 42 46 44 49

Tint 0 0 0 2R 4G 0 0

Sharpness 85 85 100 77 80 80 40


Video Processor IC: TB1253N

EZ picture values for Video Processor IC: TB1253AN


25/57

3-9 FA - SERVICING

SERVICING

IF AND AUDIO SERVICING

AGC DELAY

With a strong noise-free antenna signal, adjust with leftselect key the RF AGC (#20) to a lower setting until thesignal gets noiser. Increase the setting again (with rightselect key) for a noise-free picture.

AUDIO LEVEL ADJUSTMENT

a) Apply a RF signal with good video and audio at 100Hz at 100% modulation.b) Access item#19 AUDIO LEVEL on the service menu.c) Place a high impedance meter on pin #19 of IC1400 or the positive side of capacitor C1427. Adjust with left/right select keys the AUDIO LEVEL register to 250 mVrms.

MTS DECODER ALIGNMENT.

The purpose of this procedure is adjusting registers ofSONY audio decoder and sound processor CXA2054S(IC1400).

Initial conditions:a) Alignment should be accomplished at least ten minutes after the TV set have been turned on.b) TV sound must be set for flat response (EZ sound in Normal).c) Audio mode must be set for Stereo.d) Use 8 ohmresistive loads instead of the speakers.e) Open RM1416 and RM1417 in order to disconnect

the RF audio signal.f) Connect a Multiplex Modulator to negative of capaci tor C1427.

Five register of the audio processor should be adjusted.Bits TEST-DA and TEST1 should be set according withthe current adjust.Inside of the service menu:

To see TEST-DA and TEST1 registers enter the B key ofthe remote control (TESTDA=0 and TEST1 =0 areconditions for normal operation), then ten bits registers will display in the bottomof the screen, upper of

tree rows (see the figure 1). The first one is TESTDAregister and the second one is TEST1 register. To change the state of TESTDA and TEST1 push theQUIT key of the remote control.

ATT ADJUSTMENT

a) Set the chassis for RF input.b) Set bits TEST-DA =0 and TEST1 =0.c) Input a 100 Hz signal at 25 KHz deviation (100 % mod.), 75 us off to pin 19 of IC1400.

d) Adjust with right/ left select keys the A ATT register (item#30) for 490 mVrms (10 mVrms) in TVOUT-L output, pin 44 of IC1400.

STEREO, SAP VCO ADJUSTMENT

a) Set bits TEST-DA =1 and TEST1 =0.b) Monitor the TVOUT-R output frequency (pin 43 of IC1400) in a no input state.c) Adjust with right/ left select keys the A VCO register (item#31) of IC1400 so that frequency is as close to 62.936 KHz (0.5 KHz) as possible.

STEREO, SAP DBX FILTER ADJUSTMENT

a) Set bits TEST-DA =0 and TEST1 =1.b) Input 9.4 KHz, 600mVrms to COMP-IN pin 19 of IC1400.c) While monitoring the STATUS FLAG (FILADJ bit, see figure 2) of IC1400, adjust with right/ left select keys the A FILTER register (item#32). Align with the cen ter of the FILADJ =1 (Adjustment OK) condition range (see figure 2).

FILADJFLAG

Figure 2 A FILTER adjustment.

0

01

ADJUSTMENT POINT

FILTERREGISTER

63

SEPARATION ADJUSTMENT

a) Set bits TEST-DA =0 and TEST1 =0.b) Set volume at maximum.c) Set a stereo signal, 300 Hz at 12.9 KHz deviation (30 % mod.), left channel only, dbx ON at pin 19 of IC1400.d) Adjust with right/ left select keys the WBAND register (item#34) to reduce right speaker output at the mini

mum.e) Set the frequency only of SIF signal to 3 KHz.f) Adjust with right/ left select keys the SPECTRAL regis ter (item#35) to reduce right speaker output at the minimum.


26/57

COMPONENT PARTS LIST

FA - COMPONENT PARTS LIST 4-1

LOCATION PART NUMBER DESCRIPTION

C1202 022-08309-12A CAPACITOR ;100 MFD 20% 16V ;ELECTROLYTIC, 1 SECT

C1204 022-08312-07A CAPACITOR ;4.7 MFD 20% 50V ;ELECTROLYTIC, 1 SECT




C1216 022-08312-08A CAPACITOR ;10 MFD 20% 50V ;ELECTROLYTIC, 1 SECTC1217 022-08312-08A CAPACITOR ;10 MFD 20% 50V ;ELECTROLYTIC, 1 SECT





C1238 022-08257-12A CAPACITOR ;1000 PFD 10% 50V ;CERAMIC DISC




C1416 022-08188-05A CAPACITOR ;10 MFD 20% 25V ;NONPLZD ELECTROLYTIC


C1418 022-08049-20A CAPACITOR ;0.047 MFD 10% 50V ;POLYESTER



C1421 022-08312-07A CAPACITOR ;4.7 MFD 20% 50V ;ELECTROLYTIC, 1 SECTC1422 022-08188-05A CAPACITOR ;10 MFD 20% 25V ;NONPLZD ELECTROLYTIC













C2112 022-07786C CAPACITOR ;1000 PFD 10% 500V ;CERAMIC DISC















C2412 022-08309-11A CAPACITOR ;47 MFD 20% 16V ;ELECTROLYTIC, 1 SECTC2413 022-08312-07A CAPACITOR ;4.7 MFD 20% 50V ;ELECTROLYTIC, 1 SECT










C2915 022-07958-38 CAPACITOR ;390 PFD 5% 100V ;CERAMIC CHIP

CAPACITOR


27/57


4-2 FA - COMPONENT PARTS LIST













C3220 022-07786-10C CAPACITOR ;470 PFD 10% 500V ;CERAMIC DISC

C3222 022-07786-10C CAPACITOR ;470 PFD 10% 500V ;CERAMIC DISC

C3227 022-07877-12 CAPACITOR ;0.1 MFD 10% 250V ;POLYESTER

C3300 022-08310-16 CAPACITOR ;1000 MFD 20% 25V ;ELECTROLYTIC, 1 SECT




C5109 022-07523-01B CAPACITOR ;0.01 MFD +80 % & -20 % 2000V ;CERAMIC DISC


C5112 022-07523-01B CAPACITOR ;0.01 MFD +80 % & -20 % 2000V ;CERAMIC DISCC5114 022-08309-13A CAPACITOR ;220 MFD 20% 16V ;ELECTROLYTIC, 1 SECT














C5513 022-08049-16A CAPACITOR ;0.022 MFD 10% 50V ;POLYESTERC5514 022-08309-11A CAPACITOR ;47 MFD 20% 16V ;ELECTROLYTIC, 1 SECT






















CM1201 022-08368-20A CAPACITOR ;10,000 PFD 10% 25V ;CERAMIC CHIP, LDLESS


CM1207 022-08352-28A CAPACITOR ;47 PFD 5% 50V ;CERAMIC CHIP, LDLESS



28/57


FA - COMPONENT PARTS LIST 4-3







CM1225 022-08368-20A CAPACITOR ;10,000 PFD 10% 25V ;CERAMIC CHIP, LDLESSCM1226 022-08366-08A CAPACITOR ;1,000 PFD 10% 50V ;CERAMIC CHIP, LDLESS








CM1424 022-08376-32A CAPACITOR ;100,000 PFD +80% & -20% 16V ;CERAMIC CHIP, LDLESS



















CM2232 022-08366A CAPACITOR ;220 PFD 10% 50V ;CERAMIC CHIP, LDLESS


















CM2417 022-08368-20A CAPACITOR ;10,000 PFD 10% 25V ;CERAMIC CHIP, LDLESSCM2418 022-08368-20A CAPACITOR ;10,000 PFD 10% 25V ;CERAMIC CHIP, LDLESS












29/57


4-4 FA - COMPONENT PARTS LIST






















CM6006 022-08368-20A CAPACITOR ;10,000 PFD 10% 25V ;CERAMIC CHIP, LDLESSCM6007 022-08352-28A CAPACITOR ;47 PFD 5% 50V ;CERAMIC CHIP, LDLESS














CM6023 022-08352-28A CAPACITOR ;47 PFD 5% 50V ;CERAMIC CHIP, LDLESSCM6024 022-08366-08A CAPACITOR ;1,000 PFD 10% 50V ;CERAMIC CHIP, LDLESS










CM6040 022-08352-28A CAPACITOR ;47 PFD 5%

rp-29fa40 service manual fa

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