This is pretty different for me. This amp has like 6x separate small and large circuit boards in it, all single sided. I took a close look under a magnifier glass but could not find any solder issues to speak of.
I cannot get this amp to power up.
There are 2x30A fuses, and each fuse runs to two separate PS's which are running separate 494 PWM ICs on the same PCB. Each PS seems to have its own fuse. I can tell one of the fuses is drawing only 0.1A of power as when I pull that fuse the amp drops to 0A pull. The other fuse doesn't do anything.
The power LED lights up. Thats about all I get?
First 494:
1: 0.001
2: 2.440
3: 0.090
4: 4.93
5: 1.612
6: 3.782
7: 0.01
8: 4.97
9: 0
10: 0
11: 4.96
12: 14.02
13: 5
14: 5
15: 5
16: 0
Second 494
The only difference is pin 6: 5.04v. Everything else is same as first 494.
I cannot get this amp to power up.
There are 2x30A fuses, and each fuse runs to two separate PS's which are running separate 494 PWM ICs on the same PCB. Each PS seems to have its own fuse. I can tell one of the fuses is drawing only 0.1A of power as when I pull that fuse the amp drops to 0A pull. The other fuse doesn't do anything.
The power LED lights up. Thats about all I get?
First 494:
1: 0.001
2: 2.440
3: 0.090
4: 4.93
5: 1.612
6: 3.782
7: 0.01
8: 4.97
9: 0
10: 0
11: 4.96
12: 14.02
13: 5
14: 5
15: 5
16: 0
Second 494
The only difference is pin 6: 5.04v. Everything else is same as first 494.
Lol check out this pile of amp guts. I don’t know why I do this to myself (I have a problem). Apparently this monstrosity is from like 1988.
