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FAST very good and clear a great unexpensive job!!! very recomended for all people who are preofessional or hobbists as me!!!!!!
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Thank you very much for this Service Manual, it helped us a lot to repair the M-4318!
...BUT: The parts list is missing and the free parts katalog on web isn't complete, so now we don't know the part numbers of the defect parts :(
We had to build them out of a working machine, and need the numbers to reorder the missing parts now.
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Very good manual with clear electrical diagrams. Thanks owner-manuals.
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Great manual, thank you, sony kp46s3 service manual perfectly, i am very happy.
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Complete original Service Manual in good (scan) quality!
2-3. Circuit Descriptions
Switching Power Supply Circuit (PS-241 Board) The +9.5 V constant voltage is generated by supplying the input voltage of 10.5 V dc through 17 V dc to the chopper regulator circuit. The IC301 controls the oscillation pulse width by feedbacking the chopper output voltage at the Q303 to the pin 2 and comparing it with the reference input voltage at the pin 1. This comparison output drives the Q303 after going through the Q301 and Q302. The output is then rectified by the following rectifiers to generate the dc voltage of +9.5 V dc. D302, L302, C307, and L303 C308, L304, C316, and C309 Tally Lamp Circuit (PS-241 Board) The Q308 and IC302 is a supply voltage variable circuit for the tally lamp PL501. The DIMMER control (1RV506) controls the output voltage level. (DC +12 V through 7 V) The luminance of the tally lamp is varied by the controlled output voltage level. The Q305 through Q307 turn the tally lamp PL501 ON and OFF. Setting the TALLY switch S501 to ON, the Q306 is turned off. The output voltage at the Q305 being added to the base of the Q307, the Q307 is turned ON and the tally lamp is lit. The R TALLY CONT signal from the R TALLY IN terminal (pin 4) of the CN501 connector is added to the base of the Q304 via the pin 3 of CN301. When the R TALLY CONT signal is high, the Q304 is turned on and the R TALLY LEDs (D502, D505/LP-59 board) are lit. The G TALLY CONT signal from the G TALLY IN terminal (pin 12) of the CN501 connector is added to the base of the Q309 via the pin 6 of CN301. When the G TALLY CONT signal is high, the Q309 is turned on and the G TALLY LEDs (D501, D504/LP-59 board) are lit.
BVF-55/55CE
2-5 (E)
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