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Re: L3-3 Schematics

PostPosted: Mon Jun 19, 2017 7:40 pm
by metalhead
Hello Andreas,
Do you have the manual that goes along with your schematic? If yes, providing it would be much appreciated!
Thanks,
Duong

Re: L3-3 Schematics

PostPosted: Fri Jun 23, 2017 6:22 pm
by metalhead
Hello again,
With the help from Anatoliy Manakov (Gegen) from audioportal.hi-fi.ru forum, I managed to get a copy of the manual for the 197x era L3-3 (that matches Andrea's schematic).
Since uploading the file to this forum is not possible (djvu file), here the direct link from my Dropbox to anyone who might concern:
https://www.dropbox.com/s/jwlzfnfu50j0x ... .djvu?dl=0

Cheers,
Duong

Re: L3-3 Schematics

PostPosted: Fri Jun 23, 2017 7:35 pm
by Andreas
Hi,

no, I have no corresponding manual. The most matching one is the 1980 manual. But i own this only as bad german paper copy.
But there are only a few small differences in this L3-3 versions.

The potentiometer R43 is in most schematics a fixed resistor R101.
R177 replaces in some schematics the R100* next to the meter. In this case there are some differences at the resistors between 9/I to 12/I & 7/II.

R85 & R178* are mostly drawn as a single R85* (but in the parts listing you can see 2 resistors).

There ist one Schematic, in which a R43 potentiometer replaces R100* & R101 or R177 at the meter completely.

Re: L3-3 Schematics

PostPosted: Sat Jun 24, 2017 2:35 am
by metalhead
Hi,
Actually the most different thing is the connection of the PARAMETERS rotary switch, it has less decks in this version than the later ones. But you probably have known this already, since you've redrawn the whole schematic. Also, there are differences here and there in wiring between versions, for example in the voltage stabilizer board...
I'm still doing some extensive mods on my L3-3s, and I built a small log to keep tracks on whatever I did to them. Hence I kinda need the correct version of schematic and manual for reference, to avoid confusing and better checking back.
Anyway, thanks for the fantastic job on the schematic!

Cheers,
Duong