Asking help - what could cause R350 to burn? (JBL amplifier)

Thread Starter

Vika Tal Ohana

Joined Jul 26, 2019
Hi guys,
i ask for your help please, it is my first time attempting a fix

i try to fix a car audio amp (jbl 75.4)
-at first, a rear left channel was blown - so i replaced all tip35c&tip36c to new ones
-to be on the safe side, i replaced all old fqp50n06 too
-all worked ok for one minute and then the new tip36c on q345 became shorted
-i replaced it to a new one again and tried measuring around it but i might missed other issues

now if i try to power it on R350 would burn instantly
can you please advise what could cause that?