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Old 14th February 2009, 03:07 PM   #1
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Default Power Amp Board Identification

Does anyone recognise this power board, if so do they have a schematic that they could post or e-mail.

Thanks

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Old 15th February 2009, 04:34 AM   #2
djk is offline djk
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Sorry, don't recognize it.

It does look interesting though. Three pair of MJ12522/23 outputs, one pair of the same for drivers. LDR limiter. Has been very poorly repaired at least once.

You could probably draw the schematic easily enough.

Looks to be about 400W/4R, running on about 75V or so.
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Old 15th February 2009, 05:55 AM   #3
poynton is offline poynton  United Kingdom
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Is the label " The Hunter", the only marking ??

Andy
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Old 15th February 2009, 10:12 AM   #4
djk is offline djk
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" The Hunter"

Probably the guy that stuffed the board.

There is a similar "DC Test" sticker on the bottom left, another name on it.
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Old 15th February 2009, 11:16 AM   #5
jaycee is offline jaycee  United Kingdom
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Well, whatever it is, it has totally had it.. PCB burnt in places, diodes fried, poor mounting of parts, those power supply capacitors look like they're past it too. Also as djk says, it's been very badly repaired at some point - probably why it has blown up.

Find out what the power supply voltages are and make something to replace it. There's going to be no repairing that without making a new PCB.
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Old 15th February 2009, 11:24 AM   #6
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Quote:
Originally posted by djk
LDR limiter

Where?
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Old 15th February 2009, 11:26 AM   #7
jaycee is offline jaycee  United Kingdom
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Quote:
Originally posted by darkfenriz
Where?

If i was to take a guess, I would say it's that part to the right of the DIL8 chip on the board, in the first picture.
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Old 15th February 2009, 11:54 AM   #8
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That looks like a QSC from the early 80s. The board is all you have?
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Old 15th February 2009, 05:24 PM   #9
llwhtt is offline llwhtt  United States
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That's the power supply/amp board for a Crate PCM 6/8 powered mixer from the mid/late 80s.
I have the schematics and layouts in from of me, too large to scan though.

Craig
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Old 15th February 2009, 06:22 PM   #10
llwhtt is offline llwhtt  United States
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Sidsparks,

I have the schematic and layout scanned and ready to go, need your email.

Craig
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