Im working on this amp wondering if there is a common problem i should check since the power supply fets have 0 volts on leg 1
Other than blown outputs or power supply FETs, I know of no common problems.
Post the voltages on the 494.
Post the voltages on the 494.
1:4.97
2:4.72
3:4.72
4:.34
5:1.45
6:3.67
7:0
8:13.88
9:.04
10:.04
11:13.87
12:13.87
13:4.87
14:4.98
15:4.98
16:0
2:4.72
3:4.72
4:.34
5:1.45
6:3.67
7:0
8:13.88
9:.04
10:.04
11:13.87
12:13.87
13:4.87
14:4.98
15:4.98
16:0
If you can remove D34 without damaging it, do so. This will defeat part of the protection circuit so you'll need to have the transistors clamped and a current limiter or a 10 amp fuse inline.
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