Dicas Reparação
Modelo - Chassis KV2647R
Pesquisa: KV2647R Enviar Dica Resolvida
Resultados 61
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2647R | SHUT DOWN, HVR CRACKED | These units would go into HV shutdown intermittently. Thereason is that the HVR block had a hair-line crack. The voltage out ofthe HVR block feeding Q505 would increase up to 30VDC at times activatingprotection circuit. | ||
| Sony | KV2647R | SNOWY PICTURE, REPLACE D012 | Unit displayed snow on all channels. Inspection revealed B+to Prescaler was about 5V DC instead of 6.8V DC. Zener diode in basecircuit of 6.8V regulator was defective. | ||
| Sony | KV2647R | PART OF PICTURE BLANKING OUT, R557 VALUE CHANGED | Horizontal problem. Part of pix blanked out. Frequency notstable. Found R557/1.2 ohm resistor had climbed in value to 12 ohms.Resistor located on the 15V line. | ||
| Sony | KV2647R | INTERMITTENT NO CHANNEL RECEPTION, REPLACE R-025 | This unit would not tune stations intermittently. Found R025/22K ohm resistor increased in value to 35kohm on MF board. | ||
| Sony | KV2647R | NO CHANNEL 11 RECEPTION, REPLACE IC002 | This unit would not tune channel 11 in all the way. Thescreen displayed a HERRING BONE pattern. At first it appeared to be anAFT problem. However further investigation revealed IC002 memory to bedefective. | ||
| Sony | KV2647R | PICTURE FADE AFTER TIME, RESOLDER ON "C" BOARD | Video would begin to fade after 2 hours. Wire to C board-12VDC to outputs had intermittent cold solder connection at trace next toC702, appeared to be thermal problem. | ||
| Sony | KV2647R | CONVERGENCE CHANGE IN HOT CONDITION, REPLACE YOKE | After the set would warm up convergence would change. Lowerright corner would start to misconverge and get worse the longer set wason. | ||
| Sony | KV2647R | NO OPERATION, REPLACE IC-502 | Set would not come on, no sound or picture. Found IC501loading down Vcc on chip to 2VDC, should be 12.5VDC. | ||
| Sony | KV2647R | INCORRECT TUNING, RESOLDER R-085 | When unit turned on, it would come on with different channel. | ||
| Sony | KV2647R | FAINT LINES ON THE SCREEN | Faint lines on left side of picture. These are vertical linesspaced about one inch apart. They vary in thickness from one eighth inchto nothing as they approach the center of the screen. -HQ COMMENTS: Slight ringing (vertical bars) visible on low brig | ||
| Sony | KV2647R | SNOWY PICTURE VHF, REPLACED VHF TUNER | When switching to any low band VHF channel, the picturewould become snowy. Readjusting RF AGC control would eliminate theproblem. Then, changing channels again, the pix would be snowy again.This cycle could be repeated over and over again. | ||
| Sony | KV2647R | PICTURE DISTORTION, REPLACE C-508 | The symptom is that the raster will erratically demonstrateshort vertical sweep. It is very difficult to isolate the problem to anyparticular component due to symptom being intermittent. | ||
| Sony | KV2647R | PICTURE DRAW UP AND V JITTER, C508 REVERSED | Picture would draw up from the bottom and vertical jitter. | ||
| Sony | KV2647R | SET ON/OFF REPEATEDLY, OPEN R-143 | When AC cord is plugged in, the unit turns itself on and offrepeatedly. If the plug to socket labelled MF-5 was disconnected, theset stayed on and would not turn off at all. With this connector removed,there was no DC voltage at Pin 21 of IC101 and yet | ||
| Sony | KV2647R | PICTURE DISTORTION, REPLACED YOKE | Raster was distorted at top of picture. Customer complainedproblem most noticeable when any vertical line (or lines) appears onscreen. Straight lines were bent in towards center of CRT. Looked likepincushion correction problem. Any physical movement |