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timwebb 13th September 2011 12:56 AM

audio pipe 1800
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i have a audio pipe and one of the drive transistors are burnt. i cant read anything off it.. q28

Perry Babin 13th September 2011 01:22 AM

If you want to know definitively what it is and it's a power supply driver, look at the drivers for the other bank of FETs.

timwebb 13th September 2011 01:44 AM

the marking is m6. correct?

timwebb 13th September 2011 01:49 AM


Perry Babin 13th September 2011 02:39 AM

Is the collector connected directly to ground?

timwebb 13th September 2011 02:50 AM


Perry Babin 13th September 2011 04:30 AM

It's likely a 2SA812. If you have the MMBTA56s on hand, that should be a good sub.

timwebb 13th September 2011 04:43 AM

i have MMBTA56 on hand.doing it now.

timwebb 15th September 2011 12:49 AM

when i install the power transistors in a39q and q39 it the power light osc. when i take them out the circuit it powers up fine?

timwebb 15th September 2011 01:37 AM

could i replace the MMBC1623L6 with MMBTA42?

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