Rockville db16 4000/8000? Part substution

[rhempz01]

I rebuilding a rockville db16 says it's a 4k/8k I'm not sure where those number are fabricated from. It appears to be about a 1500 Watt amp
Anyway the power supply was completely burnt. The transistors in the power supply were 80n08A. Must I use them again or can I use the standard irf3205's in this supply. It has 47R gate resistors already.

 

[rhempz01]

Power supply section

 

[Perry Babin]

That's what I'd use.

 

[rhempz01]

The transformer was burnt up as well, had to unwind one wind and cut it and remake some of the smaller windings. It was up and running. Then I went to test the the voltage at the output card the Amp went into protection and won't come out. Anyone know what chip this board runs, or I could use some help, troubleshooting the protection.
Maybe irs2110?

 

[Perry Babin]

Probably an IR2110/2113.

Better photo of the driver board?

 

[rhempz01]

Output board

 

[rhempz01]

I went to check the voltages at the board. Red on +15 and black at rca shield that's what sent it into protection?

 

[Perry Babin]

Did any outputs fail or is it driving DC to the output filter?

The RCA shields aren't always a good reference. It's best to go straight to the secondary CT or to the negative speaker terminal (for non-bridged amps).

 

[rhempz01]

An output has failed somewhere I have - 54.6vdc at the speaker terminal.
I'm pulling the outputs now. To test them all. In curcuit they all seem OK..
Definitely learned that the hard way. I will not be grounding there again.

 

[Perry Babin]

Check them from the gate (in the board). That's often where they short first.

The driver IC or something before the outputs could have failed.

 

[rhempz01]

Thought I had the ic in stock I do not all I have is the ir2010, so I will need to order this driver chip if it's failed.