| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | SLV740HF | UNUSUAL MECHANICAL MOTIONS DUE TO TIMING | Self timing procedure not found in service manual | ||
| Sony | SLV740HF | DOES NOT LOAD CASSETTE - RESOLDERED IC201 | VCR powers up but cassette cannot be loaded. The cassette in/rec. proof switch was inproperly activated (opened) when cassette was inserted. Microprocessor vital voltages were normal, yet, motor did not activate. | ||
| Sony | SLV740HF | NO RECORD CTL, PICTURE BLANKS OUT - RESOLD PIN13 OF IC101 | Unit plays back pre recorded tapes but not it's own recording. Checked record ctl missing at plug CN101, pin 3. Checked pin 13 of Ic for control signal, absent. Signal present at pin 94 of IC201. Pin 13 of IC101 | ||
| Sony | SLV740HF | SQUEEL NOISE WHEN DRUM IS ROTATING | squeel noise is produced when the drum is rotating | ||
| Sony | SLV676 | NO RF OUTPUT IN SP/EP - REPLACE IC2 ON HF9 BOARD | Missing head output in SP & EP looks like bad heads. | ||
| Sony | SLV640HF | SQUEEL NOISE WHEN DRUM IS ROTATING | squeel noise is produced when the drum is rotating | ||
| Sony | KV32XBR70 | TUNER TAKES TOO LONG TO LOCK ON CHANNEL, REPLACED D102 | The tuner took too long to lock on to the channel. Found the H sync input to the CPU IC101/pin 21 to be only 3.8vpp. | ||
| Sony | KV32XBR25 | SHUT DOWN CAUSED BY IC-1401 | Unit shuts down, shorted IC-1401. | ||
| Sony | KV29XBR85 | PICTURE SHRUNK VERTICALLY,NO MEMORY, REPLACED D7009 | Set came in with picture reduced from top, keystoen shaped.Enterend service modek, changed setting to bring pic back to noarmal .Write settings to memory. Set would function normally. Removed power,problem re-appeared, new settings had not been retaine | ||
| Sony | KV27XBR10 | NO RASTER OR AUDIO, REPLACED D251 ON THE X1 BOARD | Blank screen accompanied by loss of audio measuremtnd dctaken with unit not functioning.IC301, P27 =.5V, P47=9V, P48=1.1V, P21=3.9V, P20=.2V, P24=2V P23=3.8VIC500 P1=2V,P2=12.9V,P3=17V, P5= 1.5V, P6=12V, P4=17VQ50V 3 =-17.7V, C=24.5V, B =17.3VD507 Catho | ||
| Sony | KV27V55 | DISTORTIOIN ON LEFT CHANNEL, REPLACED D407 | Distortion on left channel, while looking for this problem Ifound 2 diodes, D406 and D407, not listed in the service manual part listor the schematic. One of them shorted. | ||
| Sony | KV27V15 | NO AUDIO ON AA1 CHASSIS, REPLACED "M" BOARD. | No audio volume at maximum and could not control up/downvolume display. Also in audio menu, bass, treble and balance wereblacked out. | ||
| Sony | KV27TS27 | DEAD,REPLACED Q614 AND IC607 | Unit came in dead, fuses ok. Converter transistor ok, R647ok. | ||
| Sony | KV20VM20 | CHIRPING SOUND AT HIGH AC LINE LEVELS | Customer complained about a chirping sound at night when theset was turned off. Could not reproduce on counter and thought customerwas hearing normal chirp when AC is applied. Found when turning AC lineup to 125 VAC the unit would chirp every other se | ||
| Sony | KV20VM20 | TICK WHEN OFF AND AFTER GLOW, REPLACED D1822 | Replaced D1822 to cure tick noise. Added heat sink compoundto Q1801 it was not mounted. -SoLUTIOIN: D1822 corrects tick noise when off. Does Q1801 need to beheat sinked since it sits next to one? Its emitter connects to D1722which was bad. Is after |