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Modelo - Chassis


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SonyKV1972R
WHAT IS FUNCTION OF DI0DE/NOT LISTED ON DIAGRAM Diode is mounted between pin 4 and 7 of IC105. Diode notlisted in manual. -HQ COMMENTS: The diode itself is as follows: RD 13EB2, part number8-719-100-68. If servicer replaces the IC105/uPD6250C, this diode is nolonger necessary. (The diode is just
SonySLHFR70
NO TUNER AUDIO No tuner audio. TA mute (IC301-11) high. Found L006 on TI5disconnected at collector of Q003, preventing H sync from getting to IC301on SA10.
SonyCCDV9
SERVICE MANUAL ERROR Part number listed in manual (above) is incorrect. It is forCX522-153. Research revealed that the correct part number is 8-759-112-97for the UPD78112GF-505-3BE. -HQ COMMENTS: Please refer to service bulletin CSV-3 No. CAM0032.
SonySLHFT7
INTERMITTENT NO AUDIO (R-CHAN ONLY) Ckt. board pattern open from pin 15 of IC003 to pin 2 of IC202(via C201).
SonyTAAX320
SUB PART DOES NOT FIT Original switch part number 1-553-318-41 subs to 1-553-318-31.The sub part will not mount due to the screw holes that mount it notaligning with the holes in the frame of the unit. Please advise. -HQ COMMENTS: I had KCP check this out. The spacing betw
SonyBMC550
POOR COLOR - VERY LOW GREEN AND BLUE The unit recorded very poor color with almost no green andvery little blue. We found the problem to be caused by a (noseeum) acrossRV70 on the PM-2 board. There was approx. 150 OHMs to ground from thehigh side of the control. This of course loaded dow
SonyKV2675R
UNIT STAYS IN SLEEP MODE, IC-104G The unit was in the (Sleep) mode and acted as if the UPC wasnot receiving a vert pulse. Upon examination, we found the vertical pulseto be only 1VPP at IC103/p.4. This was caused by a defective charactergenerator, IC104 loading the line down. Replacem
SonyKV25XBR
SCREEN HALF DARK The left side of the screen was lighter than the right. Also,the video was smeared. We found the problem to be caused by C1658-it hasopened up. This capacitor filters the B+ to the RGB drivers. Replacementresolved the problem. -HQ COMMENTS: C1658 is
SonyVTX1100R
DISPLAY UNSTABLE The display was very unstable. We found that there was ex-cessive noise on all the B+ lines. This was due to an open decouplingcapacitor - C135 in the DC-DC converter. Replacement resolved the pro-blem. The tip off was the fact that the converter was
SonyKV2735R
PIC INSTABILITY WHEN USING VIDEO DISC PLAYER, Q-353 REMOVED When using a video disc player, the picture would jump ver-tically whenever there were rapid changes in brightness. We resolvedthe problem by defeating Q353. This prevented the vert. pulse from beingexcessively processed. All input modes work correctl
SonySL300
WILL NOT THREAD TAPE ALL THE WAY The unit would load the cassette and thread about 1 inch andthen eject the tape. We found that the capstan motor was not turning andwas the cause of the problem. Replacement resolved the problem.
SonySL250
NO TUNER VC No VC voltage for the tuner, unable to tune differentchannels. (Also S/N 810516, 813107)
SonySLHF1000
SERVICE BULLETIN NO. 312 This service bulletin has incorrect information. The correctpart number for Q830 a DTC144ES is 8-729-900-89. Also the diagram forVI-18 mount side is incorrectly drawn. It should look like this correctedversion. -HQ COMMENTS: A revision on this servic
SonyCDPC5F
SERVICE MODE TEST PROCEDURE The method of grounding pin 2 of CNP 521 and pin 8 of IC505does not enable the disc to spin. It will check front panel functs. butcannot make RF adj. or EF adj. -HQ COMMENTS: This method came from Tokyo. We did not know this pro-cedure did not work un
SonyEVC8U
NOISY PICTURE (PLAYBACK) Tape recorded on this unit played back ok on another unit. InPlayback mode, picture very noisy, looked like a de-tuned picture fromtuner. Inspection revealed excessive noise on pins 12 and 13 of IC-101,AR-4 board. Also, noise present on 5 volt line on


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