Dicas Reparação
Modelo - Chassis KV2648R
Pesquisa: KV2648R Enviar Dica Resolvida
Resultados 40
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2648R | NO HUE CONROL WITH REMOTE, REPLACED IC4002 | No hue control in remote operation. Pins 9 and 11 only go1.3V high. Also both go high at the same time. | ||
| Sony | KV2648R | GRAY BAR ON THE SCREEN | Gray bar very dark on left side and becoming lighter lookingtoward right side of CRT. | ||
| Sony | KV2648R | SHUT DOWN, REPLACE IC601 AND OTHERS | Shut down. Indicator light comes on momentarily after turnon. | ||
| Sony | KV2648R | COLOR CONFETTI ON B/W, ADJ CV301 | Color confetti on B/W telecast. | ||
| Sony | KV2648R | NO PICTURE, REPLACED F601, Q602 AND Q603 | This unit keeps on blowing F601 and Q602. Isolated problemon the F board by disconnecting the 135V B+ and supplying a separateexternal B+ (TP92 was the ground return) to the A board. This makes theA board work. HV normal but no raster. Then by using | ||
| Sony | KV2648R | NO MANUAL OPERATION, REPLACE C4038 | You cannot turn set on or off by manual button. Set wouldwork OK with remote. I found no logic high at Pin 33, IC4001. CapacitorC4038 was shorted on MZ board. | ||
| Sony | KV2648R | BOTTOM OF SCREEN BLANK OUT, REPLACED CX841 | Bottom and left side area of the screen blanked out. FoundCX841 defective. | ||
| Sony | KV2648R | NO PICTURE, REPLACED H OUT TRANSISTOR | Receiver had no B+ voltages. All voltages and waveforms atprimary side of T602, F board, were all right. Resistance check of 135Vlines was 200 ohms to ground. Horizontal output transistor was shorted. | ||
| Sony | KV2648R | SNOW PICTURE, REPLACED PRESCALER | Picture would go to snow after about 5 minutes after turn-on.Set was OK when cold. 12 volt line would drop to 7.5V and voltage atprescaler would drop to 1.5V. | ||
| Sony | KV2648R | HIGH PITCH NOISE | The unit makes a high pitch sound like a flyback with loosecore. Replacing POT transformer did help a little but still audible.Wedging the transformer almost reduce noise but awkward solution. |