Solid Audio 1500 watts Class D

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Hello!

Good Day! I have solid audio 1500 watts rms does not have an output. This amp is not in protect state.

I replaced with a new HIP8040 driver but still no output. I have +-12V into op amps. I have a rail voltage of +70Volts.

IC HIP4080 Voltage reading
1. 12
2. 13.4
3. 13.4
4. 0
5. 6.7
6. 6.5
7. 6.6
8. 6.2
9. 5.7
10. 12.9
11. 10.3
12. 10.4
13. 0
14. 0
15. 13.4
16. 13.4
17. 0
18. 0
19. 10.4
20 10.4

Thank you so much! and more power!
 

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The pot is DC offset on similar amps.

Is the red LED lit?

Is the white LED green, red or unlit?

sorry I can't distinguish RED or GREEN, Im a color blind person.

The LED lit on power side and not the protect LED. There is rail voltage and opamp voltages.

During a cold boot, there some thing scratchy noise that you can heard...after a while it gone. then silent...
 
If this amp has 470K ohm pulldown resistors on the output transistors, you can power it up without the 4080 in the circuit. Does pin 3 go low without the 4080 in the circuit?

Has anything else been done to the amp besides replacing the 4080?

This amp was junk for more than a year. I found some rusty component such capacitors. Yeah without the HP4080 the amp still powered up. I will measure the pin 3 and get back to you.
 
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