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Old 10th January 2012, 11:29 AM   #1
rrae is offline rrae  Norway
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Default pioneer rca blown

Hello,
I have question, the the speaker amplifier IC have the same ground with RCA? The situation is that RCA shield is blown and have no output from speaker terminals at headunit. 6900IB
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Last edited by rrae; 10th January 2012 at 11:32 AM.
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Old 10th January 2012, 06:19 PM   #2
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The ground is the same for both the internal amp and the RCAs but when the RCA shield ground is burned, it doesn't affect the output of the internal amplifier.
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Old 24th January 2012, 07:33 PM   #3
rrae is offline rrae  Norway
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HU came with blown rca shield and burn trace from D706 to C235/AGND. damage was done by fail'd amp, possible. There is no sound output from unit outputs. Need some advice. PAL007C might be blown? What should i check first? deh-p6900ib
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Old 24th January 2012, 09:58 PM   #4
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Does the remote output work?

Do you have ~6v on each of the 8 speaker wires of the head unit?
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Old 25th January 2012, 05:21 AM   #5
rrae is offline rrae  Norway
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If i remember correctly - there wasnt enough voltage on remote - 8v
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Old 25th January 2012, 05:26 AM   #6
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Measure it again.
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Old 25th January 2012, 06:27 PM   #7
rrae is offline rrae  Norway
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I got 4.66v on remote.
6v on each speaker wire, when meter black probe is on ground terminal.
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Old 25th January 2012, 07:05 PM   #8
rrae is offline rrae  Norway
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I got 4.19v on 22pin - mute pin
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Old 26th January 2012, 12:36 AM   #9
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The IC is likely damaged if you only have 5v on the remote output terminal.

Try grounding pin 22 to see if that allows the speaker level output to produce audio.
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Old 26th January 2012, 06:03 AM   #10
rrae is offline rrae  Norway
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I had no luck by replacing it with TDA7384A.
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