| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV32S16 | HORIZONTAL BAR, FOCUS AND CONVERGENCE OFF, IC-1504 | A 3 wide horizontal bar was displayed across center ofscreen. Picture in the bar out of focus and convergence. Found IC1504causing problem. | ||
| Sony | KV27XBR51 | GREEN FADES AWAY, ADJ GREEN CUT OFF | Unit came on fine but after 30 sec the green would graduallyfade away. Picture was then comprised of red/blue. IK circuit did notblank RGB. Cooling jungle/IC301 restored operation for a minute butreplacement did not resolve problem. | ||
| Sony | KV27XBR10 | NO HORIZONTAL OSCILLATOR PULSE, D302 | No horizontal oscillator pulse was generated from IC301. Ifpin 39 was grounded, the oscillation would appear, after extensivetroubleshooting, found zener D302 breaking under load, static check withmeter indicated good. | ||
| Sony | KV27V55 | DEAD, REPLACED C626 | Unit dead. Although power supply was oscillating, thestandby voltage was insufficient due to leaky C626. C626 filters standbyline right off rectifier. Replacement solved problem. | ||
| Sony | KV27TS32 | RGB BLANKING, D751 | Unit in RGB blanking due to IK circuit not being able tobalance colors. Problem caused by leaky D751, high reverse leakage, inthe blue output circuit. Replacement resolved problem.Anything that upsets CRT bias so red, blue and green cannot be properly | ||
| Sony | KV27EXR90 | 9.3V LINE SHORTED, SRS SHORTED | 9.3 volt line was shorted. Traced to E Board. SRS moduleconnected to E-25 was shorted. E-25 connected to CNY-25.Looking on the schematic there is no CNY-25. | ||
| Sony | KV2670R | RETRACE LINES AT TOP OF PICTURE, REPLACED C520 & C542 | TV shows white lines on the top of screen. | ||
| Sony | KV20VM20 | NO PICTURE/NO SOUND, FR1805 CHANGED VALUE | Unit came in no pictue/no sound HV ok. | ||
| Sony | KV20TS32 | DISTORTED PICTURE, FBT | Unit came in with picture flickering/flipping verticallyand pulsating horizontal width. When G2 control was turned higherproblem would get worse. G2 line, ground, focus, and HV lines all seemedin place. Performing S/B TVP0240 did not resolve problem. | ||
| Sony | KV20TS32 | NO POWER, REPLACED C632 | Dead unit. Found capacitor C632 leaking, and R610 open,Transistors Q603/604 shorted. | ||
| Sony | KV13VM20 | POWER RELAY PULSATES ON AND OFF, REPLACED Q1806 | Power relay RL-1802 pulsates on and off. | ||
| Sony | KP53S15 | SHUT DOWN,REPLACED IC-761 | Unit going into shut down, traced problem using trainingmanual IC761 shorted. | ||
| Sony | KP46V15 | NO VERTICAL, IC907 | There was no vertical deflection. This was a result of the-5v and +5v lines being very low. The problem was caused by IC907. Itwas shorted and drawing too much current from these supplies. Replacementresolved the problem. | ||
| Sony | KP46S55 | NO CUSTOMER ADJUSTMENTS OF CENTER CONVERGENCE, IC506 | IC-506/pin 13 on the A board, was bent under the ICand did not go through board when installed from factory. | ||
| Sony | KP46S55 | RGB BLANKING, Q203 | The unit was in RGB blanking. This was caused byIC302/pin 27, jungle, being pulled low via Q326 on the E1 board. Thereare basically three inputs to Q326 which is a buffer/inverter. The inputcausing the problem was a leaky Q203 on the A board. This |