Ok so I just got a Memphis in and it had a blown power supply. I replaced all those fets and checked the output fets. All seemed well. Until I install the rectifiers the power led just kind of flickers? And it never really starts up should I power it up with a larger supply. It draws 9.45amps when it fails to start up. No relay clicks nothing.
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I had this problem and didn't find a proper solution, although I got the amp working.
This may be risky but it didn't cause any problem when I did it.
Using a small wire (strand of computer ribbon cable), you will jump the driver transistor (Q4A) base to the secondary ground (use pin 1 of the 7909 (U4) in front of the driver board). Solder the wire to the base of Q4A. Hold the jumper on pin 1 of the 7909 for a fraction of a second after remote is applied (just time for the rail caps to charge) then lift it.
Does the amp power up and produce audio if you do that during startup?
This may be risky but it didn't cause any problem when I did it.
Using a small wire (strand of computer ribbon cable), you will jump the driver transistor (Q4A) base to the secondary ground (use pin 1 of the 7909 (U4) in front of the driver board). Solder the wire to the base of Q4A. Hold the jumper on pin 1 of the 7909 for a fraction of a second after remote is applied (just time for the rail caps to charge) then lift it.
Does the amp power up and produce audio if you do that during startup?
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