Sony
KV27EXR25
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Sony
KV27EXR25
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| Complaint |
Fix |
| Dead & relay clicks. Regulator good. Tip from: Vincent Electronics |
Resolder connections on side power board where regualtor IC is and replace
D623. Keep replacement diode leads longer to allow cooling of diode. Diode
needs to be checked on a VTVM on the Rx1 scale, a diode checker will say
it is good when it is not. It will give a higher resistance in the conducting
direction than a normal diode, like a Se diode. Diode is between the regulator
and switching transformer. A 3 amp 200 volts or higher diode should be used. |
| DEAD (RELAY CLICKS IF POWER BUTTON PRESSED) | REPLACE IC651 POWER REGULATOR (PN: STRS6301 OR 8-749-920-57) |
| DEAD (RELAY CLICKS ON & REGULATOR OK) | REPLACED HORIZONTAL OSC IC (PN: CXA1313S) |
| LOUD BUZZING NOISE & NO AUDIO ON LEFT CHANNEL | REPLACE IC405 (PN: 8-759-980-43) |
| NO AUDIO & TUNES ONLY CHANNEL 2 HAS PINCUSHION PROBLEM & ALL OTHER FUNCTIONS EXPECT POWER ON & OFF WON'T WORK | REPLACE IC104 SUB CONTROLLER LOCATED ON "A" BOARD (NOTE: PIN 10 OF IC104 WAS LOADING DOWN IC101) |
| NO HIGH VOLTAGE HAS SOUND (NO HORIZONTAL DRIVE COMING FROM IC301 PIN 37) | REPLACE D703 LOCATED OFF PIN 39 OF IC301 EVEN IF IT CHECKS OK |
| NO PICTURE HAS SOUND | REPLACE C536 10MFD X 50VDC CAPACITOR (PN: 1-123-875-11) LOCATED ON "A" BOARD |
| PICTURE NARROW ON BOTH SIDES (PINCUSHION PROBLEM) | REPLACE OPEN C506 330PFD X 2000VDC (PN: 116211591) LOCATED ACROSS Q502 HORIZONTAL OUTPUT TRANSISTOR |
| PICTURE SHIFTED DOWNWARD WON'T HOLD MEMORY | REPLACE IC102 & READJUST |
| PIP WON'T WORK IF PIP BUTTON PRESSED SCREEN SHOWS SRS GRAPHIC IF PIP BUTTON PRESSED ON REMOTE NOTHING HAPPENS | RESOLDER 2 PINS ON "S1" JUMPER LOCATED ON "H" BOARD CONTROL PANEL |
| SHUTSDOWN (RELAY WON'T CLICK) | REPLACE LEAKY Q608 |
| SHUTSDOWN INTERMITTENTLY ON SCREEN DISPLAY HAS 60HZ BEND | REPLACED IC101 (PN: 875963534) MICROPROCESSOR |
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