Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1515 | INCORRECT TUNING OPERATION | Could tune channels 2 to 9 only. VC on this unit cannot gobeyond 15V and band selector switch have no effect, station is tunedregardless of switch position. This problem was caused by a leakyS075 causing a high (3.2V) on Q104. | ||
| Sony | KV1515 | PICTURE DISTORTION | Intermittent vertical collapse, found C508 leaky. | ||
| Sony | KV1515 | NO LOW VHF | This unit could tune only H. VHF and UHF band. Found Q103collector to emitter leaky. | ||
| Sony | KV1515 | INCORRECT TUNING OPERATION | Unable to tune position #1 to the correct channel on any ofthe 3 band selections. All other positions function normally. Foundthat moving band switch at position 13 while in position 1 viewing modewould cause deteriorating effect on position 1 tuning, | ||
| Sony | KV1515 | NO LOW VHF | Set would not tune above channel 2, traced to leaky VC drivertransistor. | ||
| 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 | KV4000 | TUNING WOULD NOT LOCK | Will not lock on station when cold, after unit warms up willwork properly. Found waveform at Pin 8 of IC134 incorrect. | ||
| Sony | KV3000R | NO REMOTE FUNCTIONS | Upon inspection after delivery to dealer it was noted thatthere were no remote functions and only limited manual functions. Powercame on immediately after engaging master power switch and set could notbe turned off except with same. The only other manu | ||
| Sony | KV2643R | RETRACE LINES, REPLACED R749 | Excessive brightness/retrace lines. RV2203, RV304, RV701 haveno effect, Pin 12 CRT = 850V. | ||
| 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 | KV1946R | SHUT DOWN, L503 BROKEN OFF | Set would go into shut-down mode immediately at turn on.I verified horizontal oscillator and B+ circuits were operating properly.I then noticed that the coil L503 was broken off of the connection onPC board. | ||
| Sony | KV1923 | TUNING SHIFTS | Channels would program correctly. If set was on channel 2and moved to channel 8 then back to channel 2, channel 2 would not comein. Same with channel 8 when set was returned to this channel. Thiswould also happen if the set was turned off and back on. |