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Old 3rd February 2014, 05:50 PM   #31
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Replace KA7812, but the voltages:
in: -50V
gnd: -62V
out: -50V
why?
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Old 3rd February 2014, 06:24 PM   #32
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Revise, that's ok.
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Old 4th February 2014, 06:47 PM   #33
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Anybody send a picture from this section?
What value R91 and R60?
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Old 13th February 2014, 07:57 PM   #34
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Any ideas...?
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Old 1st March 2014, 12:13 PM   #35
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I think the problem on driver board.
The 1AM transistor influence the sound?
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-Rail Gate irfp250n
+Rail Gate irfp250n
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Old 2nd March 2014, 11:42 PM   #36
timwebb is offline timwebb  United States
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Location: memphis tn
u have the schematic for this driver card?
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Old 3rd March 2014, 05:17 AM   #37
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No, but it would be good...
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Old 16th March 2014, 06:30 PM   #38
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Location: Flint, Michigan
So far Ive found that this driver card is used in at least 4 amps, this amp, the brutus 4000d ,the kicker ex2000 and lightning audio la1000md, ive been trying to hunt down schematics and spare driver boards, no luck yet.
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Old 17th March 2014, 02:32 PM   #39
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Location: Flint, Michigan
I have made a mistake, the driver card i was refering to was the PS driver board not the output board.. sorry about that.
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Old 17th March 2014, 04:06 PM   #40
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I suspected But the output driver too very similar! Hifonics board with double irs.
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