s2udio
Well-known member
Rob Flinn said:The problem is definitely around U4 pin 7 from my V measurements. Also U4 is getting very hot so it must be dumping some current somewhere. I can't see any shorts & have reflowed the soldering in that region
Checking the bad channel against the good one some of the resistor readings are low, but if I measure the resistors lifted then they measure ok ........................ Hmmmm :-\
U4 pin 7 also connects to the led array and the control jack.......maybe disconnect the LM339 array ?