| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1911 | SEVERE PIN CUSHION | Severe pin cushion, pulled in 2-3 inches on each side.Checking 15 volt line found a negative H pulse on the line. Found C810to be open. | ||
| Sony | KV1747R | SETS WILL NOT LOCK ON CABLE CHANNELS | Set will not lock on cable channels. Usually the 47 modelsand models with a similar chassis. I tried reducing the value of C208but this made the problem worse. We tried increasing the values of thiscap and found that the sets would perform properly wi | ||
| Sony | KV1747R | CHANNEL LOCK | When changing channels, up/down with remote, unit would lockon channel 8 for approx. 8 to 10 seconds. Unit would scan up/down allother channels with no problem. | ||
| Sony | KV1547R | PICTURE BLANKS | Set would play 15 mins., then would start blanking in and out.Vertical would then start shrinking and soon would collapse. | ||
| Sony | KV1520R | NO VOLUME CONTROL | This unit had no volume up. We found D1117 to be ever soslightly leaky. | ||
| Sony | KV1355R | UNIT GOES SHUT DOWN MODE, CRACK ON BOARD | Any movement of cabinet would cause the set to go intoshutdown mode. I defeated the input to the shutdown circuit, Pin 17 ofIC501 to prevent shutdown in order to isolate the problem. The voltageat Pin 16 of IC501 would increase when the problem occurre | ||
| Sony | KV1221R | INTERMITTENT TURN OFF, REPLACED IC001 | This unit would intermittently turn off. We found the remotedecoder IC (IC001) to be thermally sensitive. | ||
| Sony | KP5040 | NOISE BAR IN THE CENTER OF OTHE SCREEN, CONNECTION CHANGE | A vertical bar appeared in the center of the picture whenviewing a normal program. Investigation of the circuit revealed that theLOT transformer pulse seen at Pin 1, of T504 on the E board wasdisplaced from its normal in phase relationship to the flybac | ||
| Sony | KP5040 | MECHANICAL INCORRECT OPERATION, REPLACED IC6501 | Drive voltage to the mirror door motor would not be removedonce the door had reached its end of travel. Instead, the drive motorwould continue to ratchet. | ||
| Sony | FD20A | INTERMITTENT POOR FOCUS, REPLACED CRT | This unit had intermittent focus. The focus voltage wouldgo up to 900 volts. | ||
| Sony | KX2501 | PIC DISTORTION ON CH 7, ADD GROUND BETWEEN "C" AND CHASSIS | Oscillation left side of CRT, 1 wide, appeared on channel#7 only. | ||
| Sony | KV8100 | UNIT SHUTS DOWN | When turned on, unit would shut down. Isolated problem tothe 22 volt line. It was reading 27 volts. Found Q602 regulatordriver leaky. | ||
| Sony | KV3000R | UNIT COULD NOT BE POWERED ON | Unit could not be powered on. Inspection revealed lack of12 volt DC to control circuits. | ||
| Sony | KV2650RX | NO PICTURE, REPLACE IC002 | VC voltage on chs. 2/3/4 was low - below 2 volts. Chs. 5/6and all others were fine. Found 4 volts at Pin U on tuner. | ||
| Sony | KV2647R | PICTURE DISTORTION, REPLACE C508 | Vert. foldover and decreased vert. deflection becausecapacitor (C508) failed. This same capacitor is also failing in othermodels and quite frequently. |