Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
---|---|---|---|---|---|
Sony | TCU270 | CAPSTAN MOTOR IS ALWAYS ENERGIZED | This unit maintains capstan motor running for as long as thesystem power is activated regardless if the cassette deck is in the oper-ating mode. This causes excessive wear on the mechanical components. | ||
Sony | KV1972R | 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 | ||
Sony | SLHFR70 | 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. | ||
Sony | CCDV9 | 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. | ||
Sony | SLHFT7 | INTERMITTENT NO AUDIO (R-CHAN ONLY) | Ckt. board pattern open from pin 15 of IC003 to pin 2 of IC202(via C201). | ||
Sony | TAAX320 | 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 | ||
Sony | BMC550 | 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 | ||
Sony | KV2675R | 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 | ||
Sony | KV25XBR | 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 | ||
Sony | VTX1100R | 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 | ||
Sony | KV2735R | 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 | ||
Sony | SL300 | 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. | ||
Sony | SL250 | NO TUNER VC | No VC voltage for the tuner, unable to tune differentchannels. (Also S/N 810516, 813107) | ||
Sony | SLHF1000 | 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 | ||
Sony | CDPC5F | 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 |