This is what you will look for in the amp. Find E9701 and E9702. Do you see this 'audio' on the tops of those capacitors?
Check the DCV on Q4901, Q9301 and Q9302. Does the voltage change significantly on any terminal of those with audio and when audio drops out?
I would be careful with the amp powered up without those being clamped down. The one on the right (Q4901) is likely to run hot and could fail, taking many other components with it.
Just check the DCV on all terminals, for now.
Just check the DCV on all terminals, for now.
Ok looking at that picture from left to right
0 27 -.6 -15 -30 -15 -18 0 -18
Ground lead was on a grounding screw
Sorry if I did it wrong lol
0 27 -.6 -15 -30 -15 -18 0 -18
Ground lead was on a grounding screw
Sorry if I did it wrong lol
Use the main ground terminal unless you read 0 ohms from the main ground to that screw.
For voltages, if there is a decimal for a value less than 1, use a leading 0.
In the future, list the voltages for each transistor in a column.
Q#
Leg 1:
Leg 2:
Leg 3:
Q#
Leg 1:
Leg 2:
Leg 3:
Q#
Leg 1:
Leg 2:
Leg 3:
Clamp all transistors back down and play it until the amp shuts down, then recheck the voltages. Has any changed when the amplifier malfunctions?
For voltages, if there is a decimal for a value less than 1, use a leading 0.
In the future, list the voltages for each transistor in a column.
Q#
Leg 1:
Leg 2:
Leg 3:
Q#
Leg 1:
Leg 2:
Leg 3:
Q#
Leg 1:
Leg 2:
Leg 3:
Clamp all transistors back down and play it until the amp shuts down, then recheck the voltages. Has any changed when the amplifier malfunctions?
Well I messed everything up……
Was checking again, and my probe slipped between two legs and sparks flew…. Not it doesn’t play anything….
Was checking again, and my probe slipped between two legs and sparks flew…. Not it doesn’t play anything….
Alright Perry, I got another one off eBay. And it doesn’t work…. So I’ll probably return it. But when I tested doing the same methods you mentioned above, e9701 and e9702 there is no audio. What would be the next steps if there is no audio there?