Re: Benq BL3200PT with a cooked PSU.

I found why i gat the short circuit for the capacitor 120uF 450V, the reason - is not isolated Drain mosfet 11N80C3.
I give a photo of the difference between what was and what I bought, and how to solve this problem.
Now i get standby voltages on the low voltage side of the load board....

Re: Benq BL3200PT with a cooked PSU.

parameters for replaced parts
R616 - 10k - tanning
R623 - 0,1 Ω - tanning
R620 - 15k - tanning
C615, C625 - 22uF 50V - seems ok but has been replaced
Q601 - 11N80C3 - short circuit to all pins
IC601 - TEA1751T - there is a hollow in the microcircuit housing, 100% died, for replacement
The resistor R616, R620 was tanned and the marking could not be read. But I explored a typical drawing and realized that these must be the correct resistance parameters.
I have tested all the other components...

Re: Benq BL3200PT with a cooked PSU.

Hi guys. I am a radio amateur, and basically I solder serviceable boards, repairs are not my element. but... I have a burned out power supply 4H.2CR02.A21
this is very similar to what has already been discussed in this thread, and i need your help
spoiled R616, R623, R620, C615, C625, Q601, IC601
All these parts have been replaced with new ones.
but after replacement, I turn it on through an incandescent lamp, and the lamp is on and does not go out
what else could be the problem?
on a large capacitor...