Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1221R | NO REMOTE CONTROL FUNCTION, REPLACED C007 | There were no remote control functions. The volume up/downfunctions would shut set on and off. Manual input of IC (remote control)Pin 1 always had a noise pulse and frequency at this point was incorrect.This noise pulse inhibited any input data from re | ||
| Sony | KP7220 | NO PICTURE, CONNECTOR DA-5 INTERMITTENT | Connector DA-5 gets loose and causes picture tubes to blankout, can also cause a line on green tube which burns to mark in tube. | ||
| Sony | KP5040 | POOR FOCUS, REPLACED HV BLOCK | Unable to get a good focus. Problem traced to high voltageblock. | ||
| Sony | KP5040 | DEAD, REPLACED CX171, Q5521, Q5522 | Set would not turn on. Servicer found CX171 defective whichis believed to have caused Q5521 and Q5522 to short, fuse found defective. | ||
| Sony | KV2145R | SET LOCKS ON CH 88, REPLACED CH INDICATOR ND3101 | Set was locked onto channel 88, unable to clear or change.Found pulse out of IC001 on MF board loaded down. Traced problem tochannel indicator display ND3101 on TA board. Pin 3 on display isshorting to something inside display loading down Pin 40 on IC | ||
| Sony | KV2141R | NO PICTURE, LEAKY D511 ZENER | Unit completely out of horizontal frequency. At Pin 8 ofIC501 the DC voltage reads 4V instead of 10V. Trouble traced back toleaky D511 (RD15E). | ||
| Sony | KV1945RS | PICTURE DISTORTION, REPLACED IC501, CX-557 | About the top 10 scan lines were stretch, very hard to detectbut customer complained. Vertical output waveform could see ringing,apparently leakage in the IC from horizontal. | ||
| 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 | KV1913 | NO SOUND | No sound, momentary raster. Found Q206 and Q205 leaky whichdrags the 135 B+ low (70V). | ||
| Sony | KV1913 | NO VHF LOW | No low (2-6) channels. Could not get high (7-13) band toturn off. Found D101 leaky. | ||
| Sony | KV1910 | FAINT RETRACE LINES ON SPECIFIC CHANNEL ONLY | Faint retrace lines only on channel 7. This problem appearedonly when the set was turned to cable 7. It was observed that thevertical sync pulse was compressed on this channel. This resulted in5-6 retrace lines appearing at top of screen. Linearity w | ||
| Sony | KV1207 | PICTURE NOISE | Vertical bars across screen, excess ringing off 190V line offlyback. C540 was missing from circuit. | ||
| Sony | KV1207 | NO LOW VHF | No low VHF channels, voltage on Q102 remains high regardlessof band switch position. Found D059 diode on M4 board leaky. | ||
| Sony | KV9400 | SET WOULD LOCK ON ONE CH | Could not change channels. Checked the 33 volt line and foundonly 5 volts. Traced to a leaky Q18 transistor. | ||
| Sony | KV3000 | INTERMITTENT LOSS OF RED COLOR | Customer complained of intermittent loss of red in the color.Servicer found bad connection at base of Q1344 on the B board. |