technical - acoustic psychos · r904 opens and causes unit not to power up or the power led will...
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TechnicalManual
STEREO/MONO POWER AMPLIFIER
RB-1050Table of Contents
Specification
Specification...................................... 1Parts List ........................................... 2~3Adjustment........................................ 3Case Outlines.................................... 4Note On Safety.................................. 4PCB Assembly .................................. 5~6Schematic Diagram .......................... 7~8
Continuous Power Output 70 watts/ch (20 - 20 kHz, <0.03%, 8 ohms)
Total Harmonic Distortion <0.03 %(20 - 20 kHz, 8 ohms)
Intermodulation Distortion <0.03 %(60 Hz : 7 kHz 4 : 1)
Frequency Response (±1 db) 10 Hz - 100 kHzDamping Factor (20-20,000 Hz, 8 ohms) 500Speaker Impedance (Normal mode) 4 ohms minimumSignal to Noise Ratio (IHF A network) 116 dB Input Impedance / Sensitivity 33 k ohms / 1.0 voltPower Requirements 115 volts, 60 Hz (U.S. version)
230 volts, 50 Hz (European version)Power Consumption 250 WattsDimensions (W x H x D) 430 x 92 x 350 mm
1615/16 x 35/8 x 1313/16 ins. Weight (net) 8.1 kg / 17.86 lb.
SHINSEN-BLD. 4F 10-10 SHINSEN-CHO, SHIBUYA-KU,TOKYO 150-0045, JAPAN
Serial. NO.Beginning
®
Quality Uncompromised
Y-329A-000125C/S-S
2
Parts List-1
C601.602C603.604C605.606C607.608C609.610
C611.612C613-616C617.618C623.624C651.652
C653C654C701.702C703C704
C705C706C707C708C901-908
C909-912C913D601-608D609-612D651.652
D653D654D701.702D901.902D903
D904.905F601-604IC651IC701PJ1.2
Q601-606Q607-612Q613.614Q615.616Q619.620
Q621.622Q651.652Q653-656Q657-659Q701-704
Q902R601.602R603.604R605.606R607.608
R609.910R611.612R613.614R615.616R617.618
X-1296-01 PCB ASSEMBLY041 50BGF4R7M 044 TFKP2-2A681H044 FSC160V221H041 25BGF100M044 FSC160V331H
041 50BGF10M044 FSC160V561H044 FSC160V471H044 KT18-2A104K041 UTES1E100-FB
041 UTES1E101-FB041 UTES1E470-FB044 50MSAN104J042 TP50V183J041 UTES1E100-FB
044 50MSAN104J042 TP50V103J041 TUTES1C471-TF041 UTES1E101-FB043 TC500V103
041 ALC20S1022DF ※041 UTES1J221034 T1N4148-86034 T1N4003-TB034 T1N4148-86
034 TRD5.6JST1034 T1N4148-86034 T1N4148-86034 BR84 ※034 T1N4148-86
034 T1N4003-TB※036 5ST3.15※031 MPC1237HA031 NJM555D066 4TR-2709#3
033 TC2362-FG033 TA1016-FG033 B631-EF033 D600-EF033 TC3478A-LKU
033 TA1376A-LKU032 TC536-FG032 TA608-FG032 TC536-FG032 TC536-FG
032 TC536-FG054 EE10-102054 EE10-333054 TMFR4470R054 TMFR401K5
054 TMFR4270R054 TMFR4220R054 TMF1/4-5600F054 TMFR401K5054 TMFR4270R
CAPACITOR ELEC.50V4.7UFCAPACITOR FILM 100V680PFCAPACITOR STYROL 160V220PFCAPACITOR ELEC.25V100UFCAPACITOR STYROL 160V330PF
CAPACITOR ELEC.50V10UFCAPACITOR STYROL 160V560PFCAPACITOR STYROL 160V470PFCAPACITOR FILM 100V0.1UFCAPACITOR ELEC.25V10UF
CAPACITOR ELEC.25V100UFCAPACITOR ELEC.25V47UFCAPACITOR FILM 50V0.1UFCAPACITOR MYLAR 50V0.018UFCAPACITOR ELEC.25V10UF
CAPACITOR FILM 50V0.1UFCAPACITOR MYLAR 50V0.01UFCAPACITOR ELEC.16V470UFCAPACITOR ELEC.25V100UFCAPACITOR CERA.500V0.01UF
CAPACITOR ELEC.50V8200UFCAPACITOR ELEC.63V220UFDIODEDIODEDIODE
ZENER DIODEDIODEDIODEBRIDGED DIODEDIODE
DIODEMINI FUSE 250VT3.15AIC(PROTECTION)IC(TIMER)2P PINJACK
TRANSISTOR(2SC2362K-FG)TRANSISTOR(2SA1016K-FG)TRANSISTOR(2SB631K-EF)TRANSISTOR(2SD600K-EF)TRANSISTOR(2SC3478A-LKU)
TRANSISTOR(2SA1376A-LKU)TRANSISTOR(2SC536K-FG)TRANSISTOR(2SA608K-FG)TRANSISTOR(2SC536K-FG)TRANSISTOR(2SC536K-FG)
TRANSISTOR(2SC536K-FG)RESISTOR METAL 1KRESISTOR METAL 33KRESISTOR METAL 1% 470RRESISTOR METAL 1% 1.5K
RESISTOR METAL 1% 270RRESISTOR METAL 1% 220RRESISTOR MRS25 560RRESISTOR METAL 1% 1.5KRESISTOR METAL 1% 270R
R619.620R621.622R623.624R625.626R627.628
R629.630R631.632R633.634R635.636R639-642
R645.646R647.648R651.652R653.654R655-658
R661.662R663.664R665.666R667.668R669.670
R671.672R673.674R675.676R677.678R679
R680R681R682R683R684
R685.686R687.688R701.702R703R704
R705R706R707R708.709R710
R711R712R713R720R901
R902R903R904R905R921
RY601RY901SP1TH651.652VR601.602
054 TMFR4220R054 TMFR4047K054 TMFR4100R054 TMF1/4-6801F054 TMF1/4-3901F
054 TMFR4100R054 TMFR4001K054 TMFR4047R054 NIR2-0.22JF054 NIR2-0.22JF
054 NIR2-0.22JF054 1WS10JF054 TMFR4012K054 TMF3300054 TMFR4220R
054 TMF8200054 TMF2202054 TMF1502053 CR14-681J-A053 CR14-273J-A
053 CR14-122J-A053 CR14-472J-A053 CR14-473J-A053 CR14-104J-A053 CR14-153J-A
053 CR14-563J-A053 CR14-153J-A053 CR14-104J-A053 CR14-474J-A053 CR14-682J-A
053 CR14-182J-A053 CR14-124J-A053 CR14-104J-A053 CR14-224J-A053 CR14-124J-A
053 CR14-103J-A053 CR14-101J-A053 CR14-473J-A053 CR14-104J-A053 CR14-105J-A
053 CR14-473J-A053 CR14-564J-A054 1WS3.3KJF054 1WS3.3KJF053 CR14-223J-A
054 1WS1.5KJF053 CR14-822J-A054 ERQ12AJ2R2P※054 1WS1.5KJF053 CR14-222J-A
063 DH2TU-24063 DH2U-24※067 C-4493A00034 TTC-503051 SFR002-222
RESISTOR METAL 1% 220RRESISTOR METAL 1% 47KRESISTOR METAL 1% 100RRESISTOR MRS25 6.8KRESISTOR MRS25 3.9K
RESISTOR METAL 1% 100RRESISTOR METAL 1% 1KRESISTOR METAL 1% 47RRESISTOR METAL 2W 0.22RRESISTOR METAL 2W 0.22R
RESISTOR METAL 2W 0.22RRESISTOR METAL 1W 10RRESISTOR METAL 1% 12KRESISTOR METAL 330RRESISTOR METAL 1% 220R
RESISTOR METAL 820RRESISTOR METAL 22KRESISTOR METAL 15KRESISTOR CARBON 680RRESISTOR CARBON 27K
RESISTOR CARBON 1.2KRESISTOR CARBON 4.7KRESISTOR CARBON 47KRESISTOR CARBON 100KRESISTOR CARBON 15K
RESISTOR CARBON 56KRESISTOR CARBON 15KRESISTOR CARBON 100KRESISTOR CARBON 470KRESISTOR CARBON 6.8K
RESISTOR CARBON 1.8KRESISTOR CARBON 120KRESISTOR CARBON 100KRESISTOR CARBON 220KRESISTOR CARBON 120K
RESISTOR CARBON 10KRESISTOR CARBON 100RRESISTOR CARBON 47KRESISTOR CARBON 100KRESISTOR CARBON 1M
RESISTOR CARBON 47KRESISTOR CARBON 560KRESISTOR METAL 1W 3.3KRESISTOR METAL 1W 3.3KRESISTOR CARBON 22K
RESISTOR METAL 1W 1.5KRESISTOR CARBON 8.2KFUSIBLE RESISTOR 2.2RRESISTOR METAL 1W 1.5KRESISTOR CARBON 2.2K
RELAY (SPEAKER)RELAY (POWER)SPEAKER TERMINALTHERMISTORSEMI-FIXED RESISTOR 2.2K
SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION
3
Parts List-2
C710D703.704
HJ1.2IC702Q705.706Q707R714
R715R716R717R718R719
R757S701
VR001.002
C001S901
Q617.618Q623.624Q625.626Q627.628Q631.632
069 C-3417A
X-1296-02 PCB ASSEMBLY041 UTES1H2R2-FB034 T1N4148-86
065 YKB21-5103A031 PC817B032 TA608-FG032 TC536-FG053 CR14-102J-A
053 CR14-471J-A053 CR14-103J-A053 CR14-473J-A053 CR14-104J-A053 CR14-102J-A
053 CR14-224J-A064 C-4660A00
X-1296-03.04 PCB ASSY051 C-4170A31
X-1296-05 PCB ASSEMBLY044 DE1307E472M※061 C-4176A08※
HEAT SINKER ASSEMBLY032 D1953032 C4793032 A1837033 D1047-DE033 D1047-DE
FUSE CLIP
CAPACITOR ELEC.50V2.2UFDIODE
MINI JACKPHOTO COUPLERTRANSISTOR(2SA608K-FG)TRANSISTOR(2SC536K-FG)RESISTOR CARBON 1K
RESISTOR CARBON 470RRESISTOR CARBON 10KRESISTOR CARBON 47KRESISTOR CARBON 100KRESISTOR CARBON 1K
RESISTOR CARBON 22KSLIDE SWITCH
VARIABLE RESISTOR 50KB
SPARK KILLERPOWER SWITCH
TRANSISTOR(2SD1953)DRIVER TRANSISTOR(2SC4793)DRIVER TRANSISTOR(2SA1837)POWER TRANSISTOR(2SD1047-DE)POWER TRANSISTOR(2SD1047-DE)
Q633.634Q637.638
033 B817-DE033 B817-DE017 RM4-18B00019 TO-126019 TO-3P
OTHERS011 FP-508011 TJ3-01A00012 RV4-09A00014 C-4713A01
014 RM4-07B00015 RP-369019 4TR-2823#2019 4TSH-19#2022 T-1055U01※
034 LTL1214A034 SEL1124R063 A-0710W-10A※069 C-4629A01※072 C-4621A01※
072 C-4622A01※072 C-4623A01※072 C-4624A01※081 TJ3-10A00081 Z-204
POWER TRANSISTOR(2SB817-DE)POWER TRANSISTOR(2SB817-DE)HEAT SINKER BOARDINSULATION SHEET(S)INSULATION SHEET(L)
SUB PANEL ASSYH/S PANEL ASSYPUSH KNOB 14FUPPER COVER
BOTTOM BOARDREAR CHASSISPLASTIC FOOT 24FPLASTIC FOOT 50FPOWER TRANSFORMER
LED 2FLED 1X5BREAKERAC INLETAC CORD SET for STD
AC CORD SET for AUSTRALIAAC CORD SET for UKAC CORD SET for CEEINSIDE CARTON STYROL MOULDING
SYMBOL PARTS NO. DESCRIPTION SYMBOL PARTS NO. DESCRIPTION
NOTE ON SAFTY : Symbol ※ Fire or electrical shock hazard. Only original parts should be used to replaced any part marked with symbol ※ .Any other component substitution (other than original type), may incease risk of fire or electrical shock hazard.
Instruments : DC milli–voltmeterNotes : Prior to Bias Adjustment, run about 5minutes with rated output(8ohms) and
warm up Power Transistor and Heat Sink. Set input off.
Step
TP1
TP2
X-1296-01 PCB VR601
VR602X-1296-01 PCB
1
2
Coupling Location Adjust forAdjust
DC milli–voltmeter reads 4mV
Adjustment
4
Case Outlines
Service Note
Cautions during Inspection and Repair
1. Keep in mind the safety warningsThe safety instructions are shown as the labels or printings on the exterior, the inside chassis or the parts, etc. Refer to the instructions when proceeding with inspection or repair.
2. Use only the specified parts for replacementThe selected parts are used at critical area to reduce fire hazard or electrical shock. So when replacing these parts where designaged with marks or ※ marks on the schematic diagram or the parts list, ensure to use only the same parts.
3. Ensure to dress back the AC (Mains) cord to the original positionIf for some reason, the AC cord is moved or partially disassembled, ensure to re-route or assemble back to the original position. The AC cord area is protected and secured by tubing and insulation materials for the sake of safety, so that no loose wire will touch and cause fire hazard and electrical shock.
4. Check for safety aspects after inspection or repairEnsure all parts, such as screws or wires, removed during inspection or repair are secured back to the original positions, and check visually for any anomaly. Also check for any electrical leakage or resistance to maintain the safety.
2SA608K2SA1016K2SA1376A2SC536K2SC2362K2SC3478A 2SB631K
2SD19532SD600K
2SA18372SC4793
2SB8172SD1047
PC817B NJM555D MPC1237HA
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