Siemens V275/01 Schematic And mysterious Siemens IC Help!

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synthiaks

Well-known member
Joined
Oct 8, 2013
Messages
278
Location
Berlin
Hi,

Im looking for the Schematics for the Siemens V275/01 Summing amp. It is the version with the Dünnfilm? Dickfilm? ICs on it.  I have found the schematics for the Discreet one, and the one with a 741 OP but the version with the Siemens IC is not to be found online.

Does anybody here have this? And does anybody hav ANY info about this  Siemens IC on there? I have Info about a similar IC found in the ANT V672D but the siemens one is a black hole. I have manage to remove the red film from a broken one that i have but it seem to be some kind of Porcelain  IC Wafer Hybrid with SMDs on there.

The reason I'm asking is that i have 6!!! V275s with burnt ICs on them... How this came about is not to be asked :) but i thought that since they are f**ked anyway why not take a closer look at this mysterious IC to see if there is ANYTHING to be done. The SMD Transistors on there are unmarked BTW (or the Nailpolish remover took it all away..)..

I would love any help i can get!

Regards

Sebastian
 

Attachments

  • IC Partside.jpg
    IC Partside.jpg
    1.3 MB
After some work with Nailpolish remover the IC looks like this. One of the SMDs are already removed. I suspect it to be faulty since it didn't measure  OK with a Diode test.
 

Attachments

  • ICFilmremoved.jpg
    ICFilmremoved.jpg
    1.2 MB

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