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The manual is an excellent reproduction with complete schematics, made troubleshooting and repair a simple process.
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Up to now you are the BEST! Prompt-efficient and so reasonable ! I have been after SONY service manual for quite some time !Thank you very much ! I can recomend your service to
all my collegagues ! V.Bergfield .
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This is a very good quality print (scan) of the original SONY service manual. The original from Sony is on very thin paper. Nevertheless it is very clear and sharp and excellent readable. I'm very satisfied to have now this rare document. I've looking for it many years (infrequent). It contains very detailed circuit diagrams, exploded views, part lists, PCB view with good readable connection lines. Very recommended.
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A complete manual with all the needed details of calibrations and service instructions about the radio receiver.
A big deal.
Many thanks !
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Fast delivery and good quality copy. To be recommended
KRC-4902Y
COMPONENTS DESCRIPTION
q SYNTHESIZER UNIT (X14-6892-72)
Ref.No.
IC1 IC2 IC4 IC7 IC8 IC9 IC10 IC11 IC12 Q1 Q10 Q11 Q20 Q40 Q50 Q101 Q151
Function
SYSTEM µ-COM E-VOLUME POWER AMPLIFIER POWER IC MUTE CONTROL LOGIC EQUALIZER AMPLIFIER SUB MOTOR DRIVER RESET IC EEPROM P.CON.DETECTION BACK-UP DETECTION SERGE DETECTION ACC DETECTION PREOUT MUTE DRIVER 5V SW DSI SW PANEL 5V SW Detects P.CON voltage. Detects the back-up voltage. Detects serge voltage. Detects ACC voltage. 3 input NOR gate x 3 For full logical cassette mechanism control Speaker output
Operation
For full logical cassette mechanism sub motor driver Detection voltage below 3.0V
Mutes when the base terminal voltage level becomes "L". Works when the base terminal voltage level becomes "L". LED for DSI works when the base terminal voltage level becomes "H". Works when the base terminal voltage level becomes "L". Supplies VDD to panel. Mutes when the base terminal voltage level becomes "H". Discharges the capacitor's voltage of SVR terminal after the base terminal voltage becomes "H". Changes to the local seeking after the base terminal voltage becomes "H". Works when the base terminal voltage becomes "H". Supplies the power to the motor driver. Works when the base terminal voltage becomes "L". Works when the base terminal voltage becomes "H".
Q221-224 PREOUT MUTE Q251 Q301 Q501 Q551 Q552 POWER IC SVR SW LOCAL SEEK SW MOTOR DRIVER AVR MAIN MOTOR SW MAIN MOTOR SW
q SWITCH UNIT (X16-1532-71)
Ref.No.
IC1 IC2 Q1 Q2 Q3
Function
LCD DRIVER REMOTE SENSOR KEY SCAN SW KEY ILLUMINATION SW KEY ILLUMINATION SW
Operation
Receives key signal when the base terminal voltage becomes "L". Key illumination color becomes green when the base terminal voltage becomes "H". Key illumination color becomes red when the base terminal voltage becomes "H".
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