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triotech 20th September 2009 05:39 PM

Power Transistors A1694 and C4467
 
Hi All,

I am tring to repair a TEAC AV-H500 amplifier with shorted power amp transistors type SK A1694 and C4467

Could anybody let me know where I could find those parts and where to look for the service manual of the above amplifier

Thank you for your help

Giovanni

pjp 20th September 2009 08:42 PM

Its 2SA1694 and 2SC4467

pbarrett 4th August 2010 08:27 PM

Quote:

Originally Posted by pjp (Post 1928650)
Its 2SA1694 and 2SC4467

Hi, I don't suppose you know which ones supply the audio for the centre and right channels do you ? Both of mine have deteriorated and are now almost gone.

I am without cct diagram and have not got my scope out yet.

Thanks

pbarrett 22nd August 2010 02:26 PM

Quote:

Originally Posted by triotech (Post 1928506)
Hi All,

I am tring to repair a TEAC AV-H500 amplifier with shorted power amp transistors type SK A1694 and C4467

Could anybody let me know where I could find those parts and where to look for the service manual of the above amplifier

Thank you for your help

Giovanni


I still haven't found a AV-H500 cct diagram. I bought the AV-H500D and it definatley not the same.

Managed to work out that these are the output transistors for the various chs :

Right - Q534 (C4467), Q518 (D2058), Q536 (A1694)
Left - Q533 (C4467), Q517 (D2058), Q535 (A1694)
Centre - Q583 (C4467), Q567 (D2058), Q585 (A1694)
Surround - Q584 (C4467), Q568 (D2058), Q586 (A1694)

Some of the tx numbers cannot be seen from the top/bottom without removal of the whole fan ducting including power tx's.

My PCB is a KUP 11045-1

All tx's tested ok, so resoldered everything that looks hot, in the hope a dry joint is to blame somewhere.
Will let you know.

Still not found a AV-H500 cct diagram if anybody can point me in the direction.

Paul


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