Are all of the voltages essentially the same on both driver cards, except pin 4?
What's the DC voltage on pin 4 on the defective channel?
What's the DC voltage on pin 4 on the defective channel?
All voltages are the same including pin 4 on both driver cards .
The lady channels driver card just to hot to touch with 15 secs
The lady channels driver card just to hot to touch with 15 secs
What's the resistance between any one of the output emitters and pin 4 of the driver board?
Measure for both channels.
Measure for both channels.
From what I can see, there is only one resistor (parallel with a capacitor) that connects between those points.
Find the one in the good channel and confirm that it's within tolerance, then find the one in the other channel.
Find the one in the good channel and confirm that it's within tolerance, then find the one in the other channel.
What is the value?
It appears that you have a broken connection in the bad channel if the resistor is within tolerance but you read 500k.
It appears that you have a broken connection in the bad channel if the resistor is within tolerance but you read 500k.
