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LEM Mixer 518 Stereo - Service-Manual wanted
LEM Mixer 518 Stereo - Service-Manual wanted
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Old 11th June 2020, 10:11 AM   #1
tiefbassuebertr is offline tiefbassuebertr  Germany
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Default LEM Mixer 518 Stereo - Service-Manual wanted

Who has overtaken this company ? and from where I can order schematics ?
The only URL's I find are this:
LEM Audioersatzteile - gem-lem-service
Generalmusic Promega 2+
But nobody can help there.
Best thanks for an advice in advance.
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Last edited by tiefbassuebertr; 11th June 2020 at 10:15 AM.
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Old 11th June 2020, 10:16 AM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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Have a word with Thomann. They supply them.
Looks like something from the 70s. Obsolete I expect. Still can't be complicated being old school.
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Old 11th June 2020, 10:22 AM   #3
tiefbassuebertr is offline tiefbassuebertr  Germany
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from Thomann I get the above mentioned web addresses.
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Old 11th June 2020, 10:39 AM   #4
JMFahey is offline JMFahey  Argentina
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What Jon Snell said.
Beautiful visually but old as pyramids (early 70īs, same thing), never digitalized, only paper schematics way back then, impossible to find.

But thatīs not the point.

Even with a full schematic and service manual you will go CRAZY trying to repair it.

Mixers are VERY complex (the understatement of the year) at an interconnection level.

Forget "bad parts" (as in resistors, capacitors, transistors, etc.) , each and every jack, pot, switch and internal connector will be dirty/rusty/oxidized/corroded and drive you crazy.
Cleaning might make , say, 40 pots "usable" out of 80 ... still unusable as a mixer.
Add to that 30 or 40 jacks, similar amount of switches ....

Even if it were new: not an XLR connector in sight, way back then cheap mixers like this one used stereo jacks for balanced input (IF they were balanced that is), no modern Pro microphone uses that so you will need to make up to 18 custom XLR to Plug cables.

It shows a multi pin "snake" connector for a multiple channel (4 channel or more) , very expensive cable to bring mic signal from stage and send back power amp and monitor drive.

There IS a reason somebody gave it to you for free or you found it at a pawnshop for 20 Euro, sorry.

Again: "Electronics" might work flawlessly (which I doubt), "Mechanicals" wiol drive you crazy.

Plus multiple stickers show it has seen heavy road use.
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Old 12th June 2020, 05:12 PM   #5
Tarzan is offline Tarzan  Belgium
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I had once a LEM power mixer in repair with a broken trafo. No schematic and no info on the secundary voltages.
I wrote to info@generalmusic.com (not 100% sure, it's been many years) and explained my problem.
They sent me a schematic and a new trafo at zero cost.
I must say that my Italian heritage and fair Italian message whas helpfull.
So, what keep you from trying to write to the LEM or GEM factory in Italy.
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