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Old 5th June 2010, 06:16 AM   #1
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Default Amp turning on without remote voltage.

I have a Kicker kx1200.1 that i am tinkering with.If I hook up the b+ and ground the light comes on and the relay kicks in.But it will do the same if you hook up just the remote and ground.
Maybe this is normal for this amp,I don't know.
All of the ps fets and outputs are removed.
Also get a spark when attaching b+ wire.I'm just trying to learn something here.Anybody got any ideas?
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Old 5th June 2010, 06:38 AM   #2
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Red board or green board?
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Old 5th June 2010, 06:40 AM   #3
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Sorry Perry,I knew I should have specified that.It is the red board.
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Old 5th June 2010, 06:44 AM   #4
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Check Q01 near the TL494.
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Old 5th June 2010, 06:50 AM   #5
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Does it have three legs on one side and a single leg on the other?
How would i go about checking it?DMM?
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Old 5th June 2010, 06:54 AM   #6
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Yes. Meter set to diode check. Check from leg 1-2, 1-3 and 2-3. The tab at the top is connected to the center leg.

None should read anything near 0v (meter reads voltage on diode check). Don't have voltage applied when checking the transistor.
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Old 5th June 2010, 07:00 AM   #7
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Nothing is at zero.
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Old 5th June 2010, 07:15 AM   #8
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Can you remove it?

If you don't know how to remove it, apply additional solder to the three legs so that they'll bridge and you can heat all 3 at once. Heat them for ~2-3 seconds after the solder melts then move the iron to the tab and push the transistor toward the 3-legged side. Don't let is stick to the adjacent parts. If you have kapton tape, apply a strip of it over the adjacent so the transistor can't stick to the parts.
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Old 5th June 2010, 07:26 AM   #9
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It is removed.
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Old 5th June 2010, 08:18 AM   #10
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Does it still power up?
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