Dicas Reparação
Modelo - Chassis 20
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Resultados 10825
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KP5020 | OVERSCAN GREEN CRT | Green tube was overscanned. Traced problem to Q5337.Transistor was leaky from collector to emitter. | ||
| Sony | FD20A | DEAD, REPAIRED CRACKS ON BOARD | Set came in dead. No power, whether using batteries or ACadaptor. | ||
| Sony | KP5020 | POOR FOCUS AFTER WARM-UP | After warm-up, picture would go out of focus. Found REDpicture tube focus shorting inside tube. This caused blue and green togo out of focus, since all three tubes (focus) are connected to the sameblock. | ||
| Sony | KV5200 | RASTER WITH RETRACE LINES | Set came in with all white raster with retrace lines. Audiowas OK. | ||
| Sony | KV1205 | INTERMITTENT SHUT DOWN, REPLACED Q509 | Found Q509 (HV Protect) breaking down. Replaced Q509. | ||
| Sony | KP7220 | NO BLUE, REPLACED CRT AND D5320 | The stopper diode associated with the blue CRT was shortingout about every 30-60 days. We found the problem to be caused by adefective CRT. The CRT was intermittently shorting. Evidently when alarge enough arc occurred the associated transient would d | ||
| Sony | KP5020 | NOISE LINES ON THE SCREEN | This unit produced a drive line at the left side of thescreen on all three tubes. This was also radiated to any nearby sets.The problem appeared to be located on the board. However we found thedrive line to be caused by a noisy stopper diode - D5313. | ||
| Sony | KV1920D | BLANKING BAR AT THE TOP OF THE SCREEN | A blanking bar at the top of the screen approx. 2 inches high.It did not vary with line voltage. Tech. had had some initial verticalproblems. Found only 33V on collector of Q502. Obviously 135V was noton D506. | ||
| Sony | KP7220 | FAINT CROSS HATCH ON THE SCREEN, REPLACED D303 | This unit had a faint cross hatch superimposed on picture. | ||
| Sony | TV520 | NO PICTURE | No video when replacement CRT is used. Have had 5 reports ofthis problem. P/N 8-731-105-15, CT-450 is being subbed by 1-546-039-00.This replacement has an adapter socket to use. However, when hooked upno video is received. -HQ COMMENTS: Installing th | ||
| Sony | KV1207 | JAIL BARS ON THE SCREEN | Very dark jail bar pattern on screen. Bars were so darkthat they blanked picture where they were. Found horizontal pulses onthe +12V line at Pin 10 of IC301, and discovered leaky C323. | ||
| Sony | KV1207 | NO PICTURE, SEE SB0200R | Found D064 leaky, this was replaced and 15 days later unitcame back and this time D063 was found to be leaky. Ten days later unitcame back with D063 leaky again. Each time the diode is replaced. | ||
| Sony | KV1206 | LOOSES MEMORY, REPLACED D514 | This receiver had no memory. Stations could be programmed,but would be lost as soon as channel was changed. Inspection revealed thatIC034/Pin 7 was positive, -24V was missing. Scope showed horiz. pulse on-24V line. Further checking quickly revealed D51 | ||
| Sony | KV1200U | INTERMITTENT COLOR DISTORTION, REPLACED C342 | Highly intermittent color-wrong colors-complete loss of color.Drastic hue changes would occur faces would be all blue or all green.Red would drop out completely, then chroma would degenerate into narrowrainbow lines, eventually resulting in absolute loss | ||
| Sony | RS20 | DEFECTIVE Q901 | When switching S502 from OUT to IN position and pressing C601for OGM recording stand-by, this unit rewinds the tape halfway, fastforwards, forwards, and then stops. When pressing S601 again to recordOGM, the alarm beep comes on, and it does not record O |