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Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2601 | NO UHF, REPLACED Q203 | During programming unit would skip UHF band. 12V B+ was low(10.5V), Q203 was bad. | ||
| Sony | KP5000 | INCORRECT FUNCTION FOR TUNING, Q2211 LEAKY | During programming unit would not stop on active channels inone direction from low to high. | ||
| Sony | KV2644R | NO TUNING LOCK, REPLACED C219 | Would not lock on to any channel in program. AFT voltage pin#10, IC201 down to 0.4V. | ||
| Sony | KV2643R | CHANNEL DRIFT, REPLACED IC2003 | Set would drift off channel during operation. Found IC2003(display memory) apparently loading control IC and changing PWM voltage. | ||
| Sony | KV2643R | RETRACE LINES, BROKEN LAND ON C BOARD | Servicer informed me of a problem where the picture would benormal and then get brighter and go into retrace and then back to normal.Then it again would repeat itself. | ||
| Sony | KV2643R | DEAD, REMOVE JW54 AND OTHERS | No operation above 100VAC. H. voltage was at 23KV. Servicerhad replaced flyback and IC501. Voltage to shutdown circuit was 5.7V.Removed L801, H. voltage went up to 26KV. -HQ COMMENTS: We will publish updated info on this problem shortly. Asfor now c | ||
| Sony | KV1714 | NO VIDEO | No video. Just snow only. But if you adjust the tuningselector you can get ch. 7 and ch. 5 but if you go back to ch. 5 thesignal in ch. 7 will be erased. No -24V source. | ||
| Sony | KV1543R | NO STATION SELECTION, REPLACED IC032 | Stations wouldn't select and sound would turn up but wouldn'tgo down. | ||
| Sony | KP5000 | CHANGES CHANNEL BY ITS SELF, REPLACED INFRARED SENSOR | Unit would change channels without manual or remote activa-tion. Customer indicated that remote functions would not coincide withremote hand unit when warm (this problem was intermittent). | ||
| Sony | KV2643R | RETRACE LINES, REPLACED CX556 | Set would gradually change from normal to retrace lines.Video signal on output of CX556 changing level. | ||
| Sony | KV2601 | NO SOUND, REPLACED IC033 | This customer has a lot of static from carpets in the home.A spark jumps from her finger each time she touched the channel selectionbuttons. This time it took out IC033. The last time IC2001 failedcausing no sound. On the IC033 Pin 10, ch. bias voltag | ||
| Sony | KV2601 | PICTURE DRIFT, REPLACED C516 | Dealer expressed concern over the fact that although thevertical was normal and the vertical hold was OK, the position where thepicture locked in was not in the mechanical center of the control infact it was to one end of the control. | ||
| Sony | KV1712 | DARK PICTURE | Raster very dark. Chroma information present but no Y signalat output of Y amplifier. I found DC level at Pin 14 of IC401 was veryhigh and no video here as viewed on scope. Disconnecting Pin 14 from PCboard restored the video signal at Pin 14, IC401. | ||
| Sony | KV1543R | NEON DOES NOT FUNCTION, SEE BELOW | No function of neon bulb (NL15) on remote or manual commands.All other functions work. Found only 75VAC at junction of R018 and R017to ground. | ||
| Sony | KP5000 | WILL NOT STOP CHANNEL SEARCH, REPLACED C159 | In the program mode, set would not stop searching when astation was tuned in. M-15 on the M board had the required horizontalpulse. M-9 on the M board had the sync pulse. The positive and negativeAFT voltages on Pins 1 and 2 of M-8 appear to be normal |