Dicas Reparação
Modelo - Chassis 21
Pesquisa: 21 Enviar Dica Resolvida
Resultados 8325
Pedir dica reparação
| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1921 | SHUT DOWN | Unit shuts dowm erratically. This problem confused theservicer because the original problem was a shorted damper. When AC wasapplied, the unit ran fine up to about 90V AC in then suddenly guit.By using light bulb technique we located Q510 breaking down | ||
| Sony | KV1217 | VERTICAL FOLDOVER, REPLACED C524 | Vertical foldover with blanking spot on right upper corner andjittery picture. Found C524 installed backwards during manufacturing. | ||
| Sony | KV1217 | NO UHF, REPLACED TUNER | No UHF. | ||
| Sony | KV1214 | PICTURE INTERFERENCE | Interference in shape of two vertical lines on left side ofscreen. Waveform at input to blanker stage was distorted. | ||
| Sony | KV2145R | DARK PICTURE, RESOLDER R054 | Raster goes dark with sound bars, sound normal, then normalpicture jumps back. Found R054 mounted on the print side, cold soldered. | ||
| Sony | KV2145R | H TEARING & FLASHING, RESOLDER ANODE LEAD | R067 on MF board overheats. Noticed intermittent horizontaltearing and flashing across screen. Found anode lead which is a plug intype, was not making firm contact. | ||
| Sony | KV1217 | PICTURE DISTORTION, SEE MODIFICATION BELOW | Horiz. centering adjustment will not shift picture far enoughtowards the right. Center adjustment only expands the picture. -HQ COMMENTS: Try the following circuit modification. Place the horiz.centering R. position. The R1, R2, C1 values shown shoul | ||
| Sony | KV2145R | NO VIDEO/SOUND, REPLACED PRESCALER | No video - no sound. | ||
| Sony | KV2145R | DARK PICTURE, REPLACED BRT CONTROL | Unit loses brightness (goes black) intermittently. VoltageOK, TP49 goes low whenever problem occurred. Found brightness controlshorting to its case. | ||
| Sony | KV1217 | DEAD, REPLACED Q602 | No sound, no picture, channel indicator stays in one position,tuning and band indicators are dim. Found regulator transistor Q602leaky, and both audio output transistors Q205 and Q206 shorted also R232open. | ||
| Sony | KV2145R | NO PICTURE, FBT | Set kept shorting out the horizontal output transistor. | ||
| Sony | KV2101 | PICTURE DISTORTION | Set had light vertical bands in picture. They started on theleft and became less bright as you moved to the right. Horizontal outputwaveform was affected as well. | ||
| Sony | KV1221R | NO ON/OFF FUNCTION, REPLACED RL001 | Unit would not shut down manually or on remote. Whenattempting to turn off set with manual switch or remote, the sound wouldmute, but the raster would remain. Tapped on the case of relay RL001.Power immediately went off. Found RL001 was hanging up due | ||
| Sony | KV1216 | PICTURE PULLING HORIZONTALLY, REPLACED IC201 | Picture pulling horizontally on some channels. Problemtraced to output of sync separator, Q301, where horizontal sync amplitudewas lower than normal. Observing composite video at Pin 14 of IC201showed horizontal sync pulse to be just slightly higher th | ||
| Sony | KV2145R | NO SOUND, BROKEN LEAD ON OUTPUT TRANSFORMER | No sound. Inspection revealed broken wire from secondaryof sound output transformer to solder lug, right at the lug. |