The JBL L75ms Repair

Thread Starter

R!f@@

Joined Apr 2, 2009
10,004
I tried to check the PSU without PFC.
The stby works, so jumped the ON terminal with 10K.

Nothing :confused:
I should have checked the IC. Found a short on it's supply.
Removed the card, checked the supply pins from data sheet and .....

View attachment 349127

The PFC/PWM chip was short...! Go figure !

Sigh ! I guess I have to wait for parts to even try anything.

Till then ...ta ta.
OK ... I got few major components as of now, not all.
I got the big chip in above PCB, replaced it and the small one is heating up.
There is no dead short on the supply pins of the PCB but low R reading.
So need to wait for that chip to arrive.
 
Top