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D2 Powerhouse Earthquake amplifier. Power supply down.
D2 Powerhouse Earthquake amplifier. Power supply down.
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Old 9th July 2018, 01:05 AM   #61
Perry Babin is offline Perry Babin  United States
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Remove the outputs and check them with the meter set to ohms.

Leave the outputs out and desolder all pads. Reinstall the rectifiers. Get the voltages on the 4080 if there are no problems (components overheating, excessive current draw...).
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Old 9th July 2018, 01:20 AM   #62
rhempz01 is offline rhempz01  United States
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Ok. Thanks perry.
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Old 9th July 2018, 07:49 PM   #63
rhempz01 is offline rhempz01  United States
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So the new 4080 is bad now and with a new one and the rectifiers installed there is something pulling down the power supply. The power supply starts up draws .89amps then up to 1.12amps after the rectifiers and 4080 is installed .28 amps. And the sound from the front torrid I'd back.
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Old 9th July 2018, 07:52 PM   #64
Perry Babin is offline Perry Babin  United States
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What do you mean by 'pulling down the supply'?
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Old 10th July 2018, 11:56 PM   #65
rhempz01 is offline rhempz01  United States
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Sorry the current goes from .80 to 12.5v to .22amps 12.3v. no outputs just rectifiers (checked the rectifiers again) and the 4080 in curcuit.
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Old 10th July 2018, 11:59 PM   #66
Perry Babin is offline Perry Babin  United States
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I don't see a problem, other than the regulator in your power supply may be a bit off. If it was pulling the supply down to 5 or 10v and the current increased, then, there may be a problem.
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Old 12th July 2018, 07:17 PM   #67
rhempz01 is offline rhempz01  United States
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Ok perry so just use different outputs this time around. My concern is why the new 4080 failed after I installed it. The output transistors? But all of them tested good. Open between gate and source?
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Old 12th July 2018, 10:19 PM   #68
Perry Babin is offline Perry Babin  United States
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Did they test open gate to drain?

Read section 26 on the class D troubleshooting page (CDTS). It shows how to check the drive signals without the outputs in the circuit.
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Old 13th July 2018, 04:38 PM   #69
rhempz01 is offline rhempz01  United States
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New outputs everything is installed and the amp still doesn't reach over .22amps of current.
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