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Modelo - Chassis KV2648R
Pesquisa: KV2648R Enviar Dica Resolvida
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2648R | PICTURE DISTORTION, RESOLDERED 135V RECTIFIER | Picture would expand and contract with the setting of thepicture control. There was also video noise in the picture and a highpitched faint arcing sound. | ||
| Sony | KV2648R | A SMALL PURITY SPOT ON THE SCREEN, REPLACED C801 | This unit had a small purity spot on the right-hand side ofthe screen. After much adjustment we nearly concluded that the CRT wasdefective. Further examination revealed the ETC ckt to be the cause.Disconnecting the ETC coils eliminated the problem. We | ||
| Sony | KV2648R | INCORRECT COLOR, RESOLDERED IC4005 PIN 14 | Bad color. Hue was bad. Could be mistaken for purityproblem. Found bad solder connection at Pin 14 of IC4005. | ||
| Sony | KV2648RS | MISSING R602 | Servicer found R602 missing from board. Looked like it wasnever soldered, as the holes were clean. | ||
| Sony | KV2648R | NO PICTURE, REPLACED Q502 | No picture, high pitch squeal. | ||
| Sony | KV2648R | NO PICTURE, REPLACED FBT AND Q502 | No high voltage. Flyback shorted causing horiz. output tofail. | ||
| Sony | KV2648R | HORIZONTAL BARS ON THE SCREEN, REPLACED PRESCALER AND TUNER | Horizontal bars on all channels. | ||
| Sony | KV2648R | SQUEAL FROM POWER BOARD, REPLACED T602 | Squeal from power board. Pressing on F board changes pitchof squeal. When pushing on board directly beneath POT squeal stops. | ||
| Sony | KV2648R | NO VOLUME CONTROL, LEAKY Q4025 | The bar pattern would not extend across the screen. | ||
| Sony | KV2648R | SNOW PICTURE, R557 CHANGED VALUE | The picture exhibited light snow on all channels all thetime the unit was on. After 5 to 10 minute warm up the picture shrankabout 2 inches vertically. | ||
| Sony | KV2648R | NO TUNING OPERATION, REPLACE PRESCALER | This set would not tune in any channel when the tune-upbutton was pressed. The tune-down button would work fine. All channelwere tuned in. | ||
| Sony | KV2648R | NO PICTURE, REPLACED Q602 AND Q603 | It first appeared as if Q602 shorted and that replacementwould solve the problem. However after about one hour it would shortout again. Q603 was discovered to have E-B leakage. | ||
| Sony | KV2648R | SHUT DOWN, RELAY CONTACTS | Set comes on and immediately shuts down with loss of B+.Found relay contacts spaced too far apart. Therefore there was no wipingaction to the contacts at all. I have also found this problem onnumerous other sets. | ||
| Sony | KV2648R | DEAD, REPLACE Q602 AND R616 | Set came in dead. Found convertor Q602 shorted and resistorR616 open. | ||
| Sony | KV2648R | H STRIPE ON THE SCREEN, REPLACE IC501 | This unit had a 1/2 inch wide horizontal stripe across thetube that was slightly darker than the remainder of the CRT. The signalat IC501 was down to about 1Vpp at Pin 9. The dark stripe was causedby the spreading of the raster lines in this area. The |