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Question About Sony Flat Panel Television KLV-L32M1
sony lcd power supply fault...

Hi, TV is 3.5 years old. Worked OK till yesterday. Completely dead. I opened it and identified fault to be on power supply board. Nothing comes from it at all, apart from some like 15v dc at one terminal instead of 33V, nothing at all comes to little board with switch batton and infrared sensor. tested main components on PS board (semiconds, diodes), nothing found. As well fises, and on line cracks and cold solder - all fine both sides. So angry it's happend 4 month after 3 years guarantie expired. Pazzle, can't solve it by myself. Please help! Kind regards Andrew

Asked by Chekh on 07/19/2008 2  Answers

ManualsOnline posted an answer 16 years, 3 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

Ardit posted an answer 13 years, 8 months ago

0 on top of PS board there are 3 Connectors with many pins. if you see carefully there are some of pins with 16VDC and GND. measuring them if there's 16VDC your PS Board is OK but the Main Board is defected. Else, Q621 & Q622 are faulty. their duty is to convert DC Volt to AC Quadratic Impulse Volt so the two Transformers may step-up and step-down as the vloltages are needet. Q621 and Q622 are K3683, replace them after measure the volts on Drain and Source and Gate pins.
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