AAGG--779900
SERVICE MANUAL
AM/FM Stereo Receiver
Effective : April, 2003 S-0092A
NOTES
● PC boards shown are viewed from parts side.● The parts with no reference number or no parts number in the
exploded views are not supplied.● As regards the resistors and capacitors, refer to the circuit diagrams
contained in this manual.●£ Parts marked with this sign are safety critical components. They
must be replaced with identical components - refer to the appropriateparts list and ensure exact replacement.
CONTENTS1 SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・22 ADJUSTMENTS AND CHECKS ・・・・・・・・・・・・・・・・・・・・・・・・33 EXPLODED VIEWS AND PARTS LIST ・・・・・・・・・・・・・・・・・64 PC BOARDS AND PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・8
1 SPECIFICATIONS
-2-
Amplifier SectionOutput Power....100 + 100 watts RMS (0.9 % THD, 1 kHz, 8 ohms)Total Harmonic Distortion.................... 0.05 % (at 70 watts,1 kHz)Input Sensitivity/Impedance .................. PHONO: 5 mV/22 kohms
LINE: 300 mV/22 kohmsFrequency Response ...................... PHONO: 20 Hz–20 kHz, ±3 dB
LINE: 20 Hz–50 kHz, +1/–3 dBSignal-to-Noise Ratio ................................ PHONO: 80 dB (IHF-A)
LINE: 80 dB (IHF-A)Tone Control ............................................ BASS: ±10 dB at 100 Hz
TREBLE: ±10 dB at 10 kHzLoudness Control (Volume at –40 dB Position) ..............................
+9 dB at 100 Hz, +8 dB at 10 kHz
FM Tuner Section(Without notes 98.1 MHz, 65 dBf)
Tuning Range .................... 87.5 MHz–108.0 MHz (100 kHz steps)Usable Sensitivity (IHF) ............................................ Mono: 20 dBf50 dB Quieting Sensitivity ................ Mono: 39 dBf, Stereo: 46 dBfCapture Ratio ...................................................................... 2.8 dBImage Rejection Ratio .......................................................... 20 dBAM Suppresion Ratio............................................................ 48 dBHarmonic Distortion (1 kHz) .............. Mono: 0.4 %, Stereo: 0.5 %Frequency Response................................ 30 Hz–15 kHz, +2/–3 dBStereo Separation (1 kHz) .................................................... 35 dBSignal-to-Noise Ratio ........................ Mono: 57 dB, Stereo: 55 dB
AM Tuner SectionTuning Range .......................... 530 kHz–1,720 kHz (10 kHz steps)Usable Sensitivity ............................................................ 55 dB/mTotal Harmonic Distortion .................................... 1 % at 85 dB/mSignal-to-Noise Ratio ........................................ 48 dB at 85 dB/m
GeneralPower Requirements.................................. 120 V/230 V, 50-60 Hz Power Consumption ............................................................ 180 W AC Outlets ................ Unswitched x 2, Total 100 W max (1 A max)Dimensions (W x H x D)................................ 435 x 139 x 335 mm
(17-1/8" x 5-1/2" x 13-3/16")Weight (net) ................................................ 9.4 kg (20-11/16 lbs)Standard Accessories .................................. AM Loop Antenna x 1
FM ”T” Type Antenna x 1Remote Control Unit x 1
• Design and specifications are subject to change without notice.
Voltage Conversion(General export models only)
Be sure to remove the power cord from the AC outlet beforerepositioning the voltage converter switch.
1. Locate the voltage selector on the rear panel.2. Using a flat-bladed screwdriver, set to the appropriate
230V or 120V position according to your area.
IN NORTH AMERICA USE ONLY ON 120 V SUPPLY.
2 ADJUSTMENTS AND CHECKS
-3-
2-1 AMPLIFIER SECTION
Bias Current Adjustment
1. Turn the unit on, and set the input selector switch to "CD".2. Set 7VR1 and 7VR2 to the center position.3. Connect the DC voltmeter as shown below after preheating for
10 minutes, and adjust 7VR2 (Lch) so that the voltagebecomes 3.3±1.3mV.
4. Adjust 7VR1 (Rch) in the same way.
7VR17VR2
7R46 7R44
0.33/5W 0.33/5W
DC voltmeter
7R45 7R43
0.33/5W 0.33/5W
DC voltmeter
MAIN PCB
-4-
ITEMSETTING ADJUSTMENT
POINTS ADJUST
2. AM Sensitivity
∫600 kHz/1500 kHz50 dB/m400 Hz (30 % Mod)
çREC OUT
AM 600 kHz 2T1 (BLK) Max.
3. AM IF
∫1000 kHz50 dB/m400 Hz (30 % Mod)
çREC OUT AM 1000 kHz 2T3 (WHT) Max.
4. FM Sensitivity
∂90 MHz10~20 dBf1 kHz (100 % Mod)
ƒREC OUT FM 90 MHz 2L2 (4.5T) Max.
5. FM Distortion
∂98 MHz60 dBf1 kHz (100 % Mod)
©REC OUT FM 98 MHz 2T4 (PINK) Min. distortion
6. FM Stereo
∂é98 MHz60 dBfStereo signal L-R
©REC OUT FM 98 MHz 2T5, 2T6 Min. distortion
1. VT Adjustå2R19 (VT)2J2 (GND)
FM 87.5 MHz 2L3 (3.5T) DC 1.0±0.05V
INPUT OUTPUT AG-790
After adjusting 2TC2, readjust 2T1 at 600 kHz.
AM 1500 kHz 2TC2 Max.
AM 1720 kHz
AM 530 kHz
FM 108.0 MHz
Check
2T2 (RED)
Check
≦ 8.0V
DC 1.1±0.05V
DC 8.0±0.5V
2-2 TUNER SECTION
-5-
AC VoltmeterFM Signal Generator
Stereo Signal Generator
Distortion Analyzer
D
E
G
F
AC Voltmeter
AM Signal Generator
B
C
AM LoopAntenna
60cm
2T3
2T6
2T5
2T2
2T1
2T4
2L2
2L3
2TC2
2R192J2 TUNER PCB
+ -
DC VoltmeterA
3 EXPLODED VIEWS AND PARTS LIST
-6-
-7-
EXPLODED VIEW LIST
REF.NO. PARTS NO. DESCRIPTION REMARKS
1 9A09760000 TONE KEY 530503500 2 9A09759900 TUNING KEY 530503300 3 9A09759800 FUNCTION KEY 530503400 4 9A09760200 VOLUME KNOB 530503600 5 9A09759700 DISPLAY LENS 510503800
6 9A09759600 PANEL 510503700 7 9A09760100 POWER KNOB 530503200 8 £ 9A06602800 POWER SWITCH 180222501 9 9A09760300 SP KNOB 530503100 10 9A09758660 SP SEL PCB ASSY 037900303
11 9A09758160 HEADPHONE PCB ASSY 037900405 12 9A09755060 FRONT PCB ASSY 037900105 13 9A09760700 TOP COVER 520505400 14 9A09760600 REAR COVER 520505300 15 £ 9A06900600 CORD BUSHING 550011700
16 £ 9A09580200 AC POWER CORD 210183011 17 9A09759060 SP JACK PCB ASSY 037900605 18 9A09752260 MAIN PCB ASSY 037900206 19 9A09756560 POWER PCB ASSY 037900505 21 9A09760500 BOTTOM COVER 520505200
22 £ 9A09759500 POWER TRANSFORMER 159642022 23 9A09760900 HEAT SINK 560502200 24 9A06901200 H/S BRACKET 540082800 25 9A06536400 LEG(GOLD) 540082601 26 9A09581500 RUBBER PAD 540503600
27 9A06536300 LEG(BLACK) 540082600 36 9A06900700 NAME PLATE 510104300 37 9A09757660 TUNER PCB ASSY 033700305 38 9A09760800 BRACKET 520505500 39 9A09591600 PCB SUPPORT 550505200
40 9A09760400 PCB SUPPORT 550505300 42 £ 9A06602900 AC SOCKET 26CS18401 43 9A09758500 HEADPHONE JACK HOLDER 550505400 44 £ 9A09759400 VOLTAGE SWITCH 180222902 45 9A06904300 GND TERMINAL,M3 320018601 46 9A09592000 SILICON RUBBER,T0-3P2 322228370
INCLUDED ACCESSORIES
REF.NO. PARTS NO. DESCRIPTION REMARKS
9A09551200 OWNER'S MANUAL,EFSP 600520225 9A09763000 REMOTE CONTROL UNIT,UR-420 500079000 9A06902500 FM ANT 59W360100 9A06902600 AM ANT 59W360200
-8-
4 PC BOARDS AND PARTS LIST
MAIN PCB
-9-
SP JACK PCB
SP SEL PCB
HEADPHONE PCB
POWER PCB
FRONT PCB
TUNER PCB
MAIN PCB ASSY
REF.NO. PARTS NO. DESCRIPTION
9A09752260 MAIN PCB ASSY 9A09752300 MAIN PCB 9A06896100 FUSE CLIP 9A09754600 RCA JACK,RCA602 9A09754700 RCA JACK,RCA402
9A09754800 WAFER,3P 9A09754900 WAFER,5P
1C1 £ 9A09586700 C,ELEC 35V 100UF M 1C4-5 £ 9A09586600 C,ELEC 25V 2200UF M 1C12 £ 9A09586500 C,ELEC 25V 100UF M
1C14-15 £ 9A09752500 C,ELEC 70V 8200UF M 1D1-8 £ 9A09589300 DIODE,IN4004 1D9-12 £ 9A09753100 DIODE,6A10 1D13-14 9A09589500 DIODE,IN4148 1D15-18 £ 9A09589300 DIODE,IN4004
1D19-22 9A09589500 DIODE,IN4148 1D23 9A09589100 DIODE,ZENER 24V 1W 1FU1-2 £ 9A09753200 FUSE,6.3A 250V SLOW BLOW1FU3-4 £ 9A09753300 FUSE,2A 250V SLOW BLOW1N1 £ 9A09590800 IC,L7812CV
1N2 £ 9A09590900 IC,L7912CV 1N3 £ 9A09590700 IC,L7805CV 1N4 £ 9A09753400 IC,L7809CV 3D1 9A09588800 DIODE,ZENER 6V8 1/2W 3N1 9A09753500 IC,TC9421
3N2 9A09590500 IC,TC4066BP 3V1-2 9A09589600 TR,2SC1815GR 4N1 9A09590600 IC,JRC4560D 5N1 9A09590600 IC,JRC4560D 7C28 £ 9A09587100 C,ELEC 63V 47UF M
7D1-4 9A09589000 DIODE,ZENER 24V 1/2W 7D5-6 9A09589500 DIODE,IN4148 7D7 9A09589200 DIODE,ZENER 30V 1/2W 7D8 9A09589500 DIODE,IN4148 7D9 9A09588900 DIODE,ZENER 12V 1/2W
7L1-2 9A09591000 COIL,SPRING 1.5UH7R25-28 £ 9A06889900 R,1/2W 3.3K 7R43-46 £ 9A09753600 R,CEMENT 5W R33 J 7R61-62 £ 9A09585400 R,2W 6R1 J 7R68 £ 9A06889900 R,1/2W 3.3K
7R70 £ 9A07127500 R,2W 47 FMO 7R77-78 £ 9A09585500 R,2W 10 J 7V1-4 9A09589700 TR,2N5551 7V5-10 9A09589800 TR,2N5401 7V11-14 9A09589700 TR,2N5551
7V15-16 9A09753800 TR,2SD669A 7V17-18 9A09753900 TR,2SB649A 7V19-20 £ 9A09754000 TR,2SC5200-O 7V21-22 £ 9A09754100 TR,2SA1943-O 7V23-24 9A09589700 TR,2N5551
7V25 9A09589800 TR,2N5401 7V26-29 9A09590100 TR,2SC8050D 7VR1-2 9A09585700 VR,SEMI-FIXED 300 J RELA-D 9A09591100 RELAY,12V 5A
FRONT PCB ASSY
REF.NO. PARTS NO. DESCRIPTION
9A09755060 FRONT PCB ASSY 9A09755100 FRONT PCB 9A09756400 VFD DISPLAY
8D1 9A09592400 DIODE,ZENER 5V1 1/2W 8D2-7 9A09589500 DIODE,IN4148
8G1 9A09592800 OSC,CRYSTAL 4.433M8IR1 9A09755300 INFRARED RECEIVER,SM00388N1 9A09755400 IC,HT48R50A-1 8N2 9A09755500 IC,PT6311 8N3 9A09592600 IC,HT24LC02
8V1 9A09755700 TR,2SA1015GR8VR1 9A09755800 ENCODER,R162EC-D1-20F-24CLED1-3 9A09755900 LED,M3 RED SW1-16 9A09593100 SW,TACT
TUNER PCB ASSY
REF.NO. PARTS NO. DESCRIPTION
9A09757660 TUNER PCB ASSY 9A09625000 TUNER PCB 9A09625100 TUNER SHIELD CASE
2D1-2 9A09589500 DIODE,IN4148 2G1 9A09622100 FILTER,CERAMIC L10.7MS2 R
2G2 9A09622200 FILTER,CERAMIC SFU450B 2G3 9A09622100 FILTER,CERAMIC L10.7MS2 R2G4 9A09622300 OSC,CRYSTAL 4.5MHZ2L1 9A09622400 COIL,SPRING 3.5T M4.5 2L2 9A09622500 COIL,SPRING 4.5T M3.5
2L3 9A09622600 COIL,SPRING 3.5T M3.5 2L4 9A09622700 INDUCTOR,AL0410 1022L5 9A09622800 INDUCTOR,AL0410 2212N1 9A09622900 IC,TA2149N 2N2 9A09623000 IC,TC9257F
2T1 9A09623800 IFT,AM RF 10B(BLK) 2T2 9A09623900 IFT,AM OSC 7B(RED) 2T3 9A09624000 IFT,AM IFT 7B(WHT) 2T4 9A09624100 IFT,FM DET 7B(PNK) 2T5-6 9A09624200 IFT,MPX 8B(BLK)
2TC2 9A09624300 SVC,CYM1-2/7 2V1 9A09624400 FET,2SK161GR 2V2 9A09624700 TR,2SC9018H 2V3 9A09624600 TR,2SC9014C 2V4-5 9A09589600 TR,2SC1815GR
2V8 9A09624700 TR,2SC9018H 2VD1-2 9A09624800 DIODE,VARACTOR V1043 2VD3-4 9A09624900 DIODE,VARACTOR V149B 2X1 9A07129000 ANT JACK
-10-
HEADPHONE PCB ASSY
REF.NO. PARTS NO. DESCRIPTION
9A09758160 HEADPHONE PCB ASSY 9A09758200 HEADPHONE PCB 9A09758500 HEADPHONE JACK HOLDER
7D11-12 9A09589500 DIODE,IN4148 7K1 9A06535000 HEAD PHONE JACK 7R75-76 £ 9A09758300 R,2W 470 J
SP SEL PCB ASSY
REF.NO. PARTS NO. DESCRIPTION
9A09758660 SP SEL PCB ASSY 9A09758700 SP SEL PCB
SWA-B 9A09758800 SP SELECTOR SW
SP JACK PCB ASSY
REF.NO. PARTS NO. DESCRIPTION
9A09759060 SP JACK PCB ASSY 9A09759100 SP JACK PCB 9A09759200 SP JACK
POWER PCB ASSY
REF.NO. PARTS NO. DESCRIPTION
9A09756560 POWER PCB ASSY 9A09756600 POWER PCB 9A06896100 FUSE CLIP
C1-3 £ 9A09587200 C,275V 0.01UF K
FU1 £ 9A06534900 FUSE,2A 125V SLOW BLOWFU2 £ 9A09753200 FUSE,6.3A 250V SLOW BLOWFU3 £ 9A09756800 FUSE,3.15A 250V SLOW BLOWL1 £ 9A09756700 COIL,TOROID
-11-
4 52 31
C
B
A
SCHEMATIC DIAGRAM AG-790 MAIN PCB (1/2)
1 st Issue; March 2003
4C1622
4C1522
+9V
1I/O
1
1O/I
2
2O/I
3
2I/O
4
2C5
3C6
VSS
73I
/O8
3O/I
9
4O/I
10
4I/O
11
4C12
1C13
VD
D14
3N2CD4066
1234
1XS5
1231XS6
3C34104
3C32152
3C28103
3C26473
3C384U7/50V
3C3647U/16V
3C30
0.47
U/5
0V
3C202U2/50V
SW-O
UT
33
R-T
O-I
32
T1
31
T2
30
T3
29
R-T
O-O
28
R-V
RIN
27
LD
126
LD
225
A-G
ND
24
VR
-OU
T23
PVR-IN 22
R-FOUT 21
R-ROUT 20
VDD 19
STB 18
DATA 17
CK 16
GND 15
L-ROUT 14
L-FOUT 13
FVR-IN 12
VR
-OU
T11
A-G
ND
10
LD
29
LD
18
L-V
RIN
7
L-T
O-O
6
T3
5
T2
4
T1
3
L-T
O-I
2
SW-O
UT
1
L-IN444
L-IN343
L-IN242
L-IN141
VSS40
VREF39
VCC38
R-IN137
R-IN236
R-IN335
R-IN434
3N1TC9421
+12
-12V -12V
3R23470
3C112U2/50V
4R12180K
4R4390
4R18 1004C20
47U/16V
4N1-24558D
4N1-14558D
5C647U/16V
5C547U/16V
5R10100
5R9100
5R847K
5R747K
5R21K
5R11K
3C1471
3C2471
3C3471
3C4471
3C6471
3C7471
3C8471
3R8 1K
3R7 1K
3R6 1K
3R5 1K
3R4 1K
3R3 1K3R2 1K
3R1 1K
4R141k
CD/L
PHONO/R
CD/R
PHONO/L
REC/L
AUX/L
AUX/R
TAPE/L
REC/R
TAPE/R
4R1470
4R2470
4R522K
4R622K
4C1471
4C2471
4C3181
4C4181
4C5181
4C6181
4C9102
4C10102
4C13223
4C14223
4C11562
4C12562
4R9 12K
4R10 12K
4R7270
4R8270
4C747U/16V
4C172U2/50V
4C18
2U2/
50V
4C1947U/16V
4C847U/16V
4R131k
5C3101
5C4101
3R9 47K
3R10 47K
3R11 47K
3R12 47K
3R13 47K
3R14 47K
5N1-14558D
5N1-24558D
4R17100
4R3390
4R11180K
3C122U2/50V
3C142U2/50V
3C42100U/16V
3C152U2/50V
3C47
100U
/16V
3C46104
+12
3C132U2/50V
3C162U2/50V
3C232U2/50V
3C242U2/50V
3C182U2/50V
3C4147U
3C172U2/50V
3C192U2/50V
3R161k
3R151k
3R191K
3R201K
3R182K2
3R21100
4R1533K
4R1633K
3C43104
1231XS1
3V22SC2878
3V12SC2878
3R172K2
5R347k
5R447k
5R615k
5R515k
3C290.47U/50V 3C35
47U/16V
3C374U7/50V
3C394U7/50V
3C404U7/50V
5C147U/16V
5C247U/16V
3C25473
3C27103
3C31152
3C33104
3C212U2/50V
3C222U2/50V
MU
TE
TA
PE
/TA
PE
6
5
7
4
12
3
8
1
3
2
4
5
67
8
TUNER IN
R L
3R22100
+9V
3C44100U/16V
3C45104
3C5471
3R2422k
3R2522K
3D16V8
3R28 100K
3R26100K
3R27 100K
3R30100K
3R29100K
3R31 100K
3R33100K
3R32 100K
3R34 100K
3R36 100K
3R35100K
3R37100K
3R3947K
3R3847K
L-1
R-1
AM/FM Stereo ReceiverAAGG--779900
4 52 31
C
B
A
SCHEMATIC DIAGRAM AG-790 MAIN PCB (2/2), HEADPHONE PCB, SP SEL PCB, SP JACK PCB, POWER PCB
7C3110P
7C3010P
S27R7810/2W
7R7710/2W
7V255401
S1PO
WE
R S
W
C1
103/
250V
FU26.3A/250V
1C15
6800
U/7
0V
1R3
15K
1C14
6800
U/7
0V
1R215K
1D101N5404
1D111N5404
1D121N5404
1D91N5404
7C22104
7C28
47U
/63V
1D15
4004
1D18 4004
1D144148
7R6910K
7R70
100
7R7347K
7R74
47K
1C1310U/63V
1R5 22K
7C27220U/16V
7C26220U/16V
1D13
4148
7R7210K
7C254U7/63V
7C23102
7R6356K
7R5922K
7V298050D
7V288050D
7V278050D
7V268050D
7C21
104
7R62
5.1/
2W7R
6022
K
7R61
5.1/
2W
7R71
10K
7C1747U/25V
7R511K
7R1522K
7R19100
7R17100
7V15551
7R11K
7C1
4U7/
50V
7R53K3
7R73K3
7R253K3/0.5W
7R29220
7C5
47U
/63V
7V35551
7R9100
7R11100
7R1322K
7V95401
7V15669A
7V195200
7V211943
7V17649A
7V135551
7V1155517V5
54017V7
5401
7C9104
7C1330P
7R313K3
7R331K5
7VR1300
7C1530P
7R35
220
7R213K3 7R23
3K3
7C747U/63V
7C11104
7R27
3K3/
0.5W 7R49
33K
7R37220
7R3933
7R43
0.33
/5W
7R45
0.33
/5W
7R47100
7R41100
7V235551
7R53
3K3
7R55
27K
7C194U7/50V
7L11.5uH
7L21.5uH
7C204U7/50V
7R56
27K
7R54
3K3
7V245551
7R42100
7R48100
7R46
0.33
/5W
7R44
0.33
/5W
7R4033
7R38220
7R5033K
7R28
3K3/
0.5W7C12
104
7C847U/63V
7R243K3
7R223K3
7R36
220
7C1630P
7VR2300
7R341K5
7R323K3
7C1430P7C10
104
7V85401
7V65401
7V125551
7V145551
7V18649A
7V221943
7V205200
7V16669A
7V105401
7R1422K
7R12100
7R10100
7V45551
7C6
47U
/63V
7R30220
7R263K3/0.5W
7R83K3
7R63K3
7C2
4U7/
50V
7R21K
7V25551
7R18100
7R20100
7R1622K
7R521K
7C1847U/25V
7R433K
7C4
100P
7C3
100P
7R333K
7C24
10U
/63V
7R672K7
7R68
3K3/
1W
7R64
510K
7D84148
7R65220K
7R66
4K7
1XS1
1XS2
1D31N4004
1D41N4004
1D21N4004
1D11N4004
1C1
100U
/35V
1R1100
1XS3
1D51N4004
1D81N4004
1D61N4004
1D71N4004
1C4
2200
U/2
5V
1C5
2200
U/2
5V
1N378M05
1N1
7812
1N2
7912 1C10
1000
U/1
6V
1C11
1000
U/1
6V
1C3
470U
/16V
1D16
4004
1D17
40041R
42K
2
1C12
100U
/25V
RELD
1FU16.3A/250V
1FU26.3A/250V
7D730V
7D124V
7D3
24V
7D224V
7D4
24V
7D1012V
7R5718K
7D54148
7D64148
7R5818K
12
1XP12
12
1XP13+12
-12V
AC 120V/230V
SEL.SWVOLTAGE
+5VG
123
1XP7
123
1XS7
SWB
SWA
RELARELB
1873245 7K17R75 680
7R76 680
1X1Speakers out
7C29103
RELC
ON
OF
F
ON
OF
F
7D114148
7D124148
R
LG
LR
1 2 3 4
1XS8
B C A V
1 2 3 4
1XP8
VACB
OFF OFF OFF ONONON
R
LG
1 2 3 4 5 6 7
1XS9
1 2 3 4 5 6 7
1XP9
AL
+A
R+
BL
+B
R+
AL
-
AR
-G
AL
+
BL
+
AR
+
BR
+
AL
-
BL
-
AR
-
BR
-A
L+
AR
+B
L+
BR
+A
L-
AR
-G
L R RL
L1-1
L1-2
C3103/250V
C2103/250V
AC JACK OUT
FU3
3.15
A/2
50V
1N4
7809
+9
+12VG
1 2 3 4 5 6 7
1XS4P
OW
2.1V
-24V
0V 2.1V
DG
ND
+5V
1D19
1N41
48
1D20
1N41
48
1D22
1N41
48
1D21
1N41
48
1C18
100U
/16V
1C19
220U
/16V
1FU3 2A/250V
1FU4 2A/250V
RL
FU12.5A/250V
1D2324V/1W
R-1
L-1
1 st Issue; March 2003AM/FM Stereo Receiver
AAGG--779900
4 52 31
C
B
A
SCHEMATIC DIAGRAM AG-790 TUNER PCB
1234
1XS14
2L3 3.5T
2L2 4.5T
2X1
2T5
2C5152
*2R12 1K
2C37
100U
/10V
2C28203
2L4102
2C20203
2D1IN4148
2L5221
2C43203
2C38100U/10V
1 2
1XS13
2C45203
2C24102
2R202K
2R21 2K
2R22 2K
2G44.5M 2R23
2K4
2C4130
2C4230
2C44103
2R171K
2C403U3/50V
2V5C1815GR
2V4
C18
15G
R
2C46203 2C
4710
0U/1
6V2C
3947
U/1
6V
2R18
1K
2R198K2
1 2 3 1XS10
12
1XS12
XT1
XTN2
PERIOD3
CLOCK4
DATA5
OT-16
OT-27
OT-38
OT-49
I/O-510 I/O-6 11
VDD 12
AMIN 13
FMIN 14
GND 15
IFIN2 16
I/O-8 17
I/O-7 18
DO1 19
DO220
2N2TC9257F
2C16 203
*2TC12/7
2VD1V104
2VD3V149B
2C26
104
2C27104
2R11
3K3
2C361U/50V
2R133K3
2C354U7/50V
2C19102
2C22102
2C23102
2C21102
2R15300K
2R142K
2R9100K
2C10 501
2C15203
2C920
2R108K2
2R6 100K 2C13
203
2C4*7
2C6152
2R3 3K3
2R53K3
2C122032C8
1522C25104
2R4100
2R8100K
2C14203
2R7100K
2C7
152
2R1622K
2C34
220U
/10V
2C334U7/50V
2C324U7/50V
2C17682
2C18 682
2C3122U/16V
2G1 L10.7M2G2 450B
2R1 330
2C29
U1/
50V
2C330
2C2332C1
30 2L1
3.5T
2R2
330
2T3
2T2
2C11103
2VD
2V
104
2V1K161GR
2TC22/7 2T1
2VD4V149B
2V39014C
2V2 9018H
RFGND1
RFIN2
AMLCUT3
MIXOUT4
VCC5
AMIF6
FMIF7
GND8
AGC9
QUOD10
ROUT11
LOUT12 LPF2 13
LPF1 14
DETIN 15
DETO 16
IFREQ 17
ST 18
OSCO 19
AMOSC 20
FMOSC 21
AMRF22
RFVCC 23
FMRF 24
2N1TA2149N
2C51153
2C49153
2C48153
2C50153
2T4
2C52
203
LOOP75FM AM
RGL
+12V
G
+5V
G
DATA
CLOCK
PERIOD
ST
2C53 18
2T2
2G3
L10
.7M
2V99018H
2R29 300K
2R30 330
2R31 330
2C5422
2R32 15
2D2 IN4148
2C5547
1 st Issue; March 2003AM/FM Stereo Receiver
AAGG--779900
4 52 31
C
B
A
SCHEMATIC DIAGRAM AG-790 FRONT PCB
INSTRUCTIONS FOR SERVICE PERSONNELBEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSEDPARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.
12345678910111213
14
15
16
17
18
19
20
21
22
23
24
25
26
27 28 29 30 31 32 33 34 35 36 37 38 39
40
41
42
43
44
45
46
47
48
49
50
51
52
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
8R2756k
OSC
LED1STANDBY
LED3LOUDNESS
LED2MUTING
8R2560
8R28560
8R29560
G1
G2
G3
G4
G5G6G7G8G9G10G11
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
KEY1KEY2KEY3KEY4VDD
VDD
VDD
2.1V
2.1V
+5V
-24V
VEE
VSS
LED1
LED2
LED3
LED4
LED5
STB CLK IC DIN DOUT
SW4
BAND
SW5
FM MODE
SW6
MEMORY
SW7
AUX
SW8
TAPE M
SW3
UP
SW2
DOWN
SW1
TUNING MODE
SW13
LOUDNESS
SW11
CD
SW10
PHONO
SW9
TUNER
SW12
SLEEP
SW14
BASS
SW16
BALANCE
SW15
TREBLE
8D31N4148
8D41N4148
8D51N4148
8D61N4148
8D71N4148
8R21 10K
8R22 10K
+5VPOW
DGND
0V8R110K
8C2100U/25V
8C3100U/35V
8D21N4148
8C1470U/16V
8R26
10K
8R25
10K
8R24
10K
8R23
10K
V F D
8C6104
S13 S14 S15 S16
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
+5V
8C410U/16V
REMOTE
VOLUME
+5V
8R2010K
8C830
8C730+5V
8R19 100k
8C5104
8G14.433MHz
1
2
3
45
6
7
8
DATACLOCKPERIODST LED
STBDATACK
TAPEMUTE
PA1
PA2
PA3 PA4
PA5
PA6
PA7PA0
PB0
PB1
PB2
PB3
PB4
PB5 PB6
PB7
PC0
PC1 PC2
PC3
PC4
PC5VSS
INT
RES
VDD
OSC1
OSC2
SDA
SCL
24C02
8R17 1k
8R16 1k
8R15 1k
8R14 1k
8R13 1k
8R12 1k
8R11 1k
8R10 1k
8R8 1k
8R7 1k
1
2
3
8R3330
8R410K
8R510K
37
36
35
34
33
323130292827
45
44
43
42
41
40
39
34
35
38
37
36
30313233
8
9
6
5
/TAPE
8V12SA1015
8R1810K
1234567
1XP4
8TR1
5
6
7
8
9
8N1
8N2
8N3
8VR1
1234
1XP14
123
1XP5
123
1XP6
SENSOR
HT
48R
50A
-1
PT6311
8D15V1
8R312R2
8R302R2
8R32 3k9
8R33100
8C9104
1 st Issue; March 2003AM/FM Stereo Receiver
AAGG--779900NOTES:£Parts marked with this sign are safety critical components.They must always be replaced with identical components-refer to the appropriate parts list and ensure exact replacement.