Cambridge Audiolab 8000M monoblock amp

[mobyd]

A have one of these critters on the workbench that has let the magic smoke out badly. Unfortunately it is somewhat different to the other 8000 series on Elektrotanya. Can anyone help me out with a schematic please.
Thx, M.

 

[tiefbassuebertr]

I know the stereo power amplifier Camtech P100 and P101 - and I think it is similar. To check out my schematics please let me know the PCB-number or do upload an image from your PCB version.
According
Audiolab - Wikipedia
maybe there was several versions available.

 

[mobyd]

The silkscreened PCB identifier is: CST218-023 Issue 1
The sticky label on the PCB is: 00768.04

 

[tiefbassuebertr]

I note, that the schematic from elektrotanya under
AUDIOLAB 8000P SCH Service Manual download, schematics, eeprom, repair info for electronics experts
is from the stereo version of this amp - go to
Audiolab
my own diy schematic is according those from elektrotanya.

Your version is the monaural version of this amp and I think, there are no great differences in detail.

In general and even according your image there are various overheating resp. burning areas on the PCB. Unfortunately this is also to observe by many other brands like Mark Levinson (No. 23.5 e. g.) and Krell (KBL e. g.).
Consequences are broken solder joints and destroyed traces in several cases.
For a reliable service a re-design so as a lot of hard work and effort is necessary.
In Germany this company makes repair service on amp devices from this brand:
Freie Ton- und Bildwerkstatt: Audiolab 8000a erste Version

 

[mobyd]

The 8000P,A and X7 all use a pair of BJTs in the front end.
The only one I've found that uses a dual fet (the unobtanium K389-V) like in the
8000M is the 8000S, so I'm using that as a rough guide - but it's not a perfect match.
M