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Wiring diagram or service manul LEM RX300 amplified audio mixer
Wiring diagram or service manul LEM RX300 amplified audio mixer
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Old 1st April 2020, 01:42 PM   #1
maxmix69 is offline maxmix69  Italy
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Default Wiring diagram or service manul LEM RX300 amplified audio mixer

Hello everyone, forgive my bad English, I use the google translator. The subject of my thread says it all. Can someone help me?
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Old 2nd April 2020, 09:15 AM   #2
turk 182 is offline turk 182  Canada
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what sort of trouble are you having?
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Old 2nd April 2020, 10:15 AM   #3
djeddie is offline djeddie  United Kingdom
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Is that a rebadged Behringer unit? Looks very similar to one to me... but maybe my dodgy screen!
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Old 2nd April 2020, 01:15 PM   #4
maxmix69 is offline maxmix69  Italy
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Thanks for your interest. It comes from a used market and some electronic components are missing on the amplifier board, the rest works well.

The circuit is quite simple, a pair of LM3886 per channel in bridge with photoresistor limiter plus an NTC resistance that drives an LM317 to vary the speed of a cooling fan. I would not waste time getting the values ​​of the missing electronic components, possibly I first put a different type of amplifier, there is enough space inside.
I don't think he's a re-branded Behringer because the LEM company belongs to the historical Italian companies. Unfortunately, today it no longer exists.
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Old 3rd April 2020, 11:30 PM   #5
Mark Tillotson is offline Mark Tillotson
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Quote:
Originally Posted by djeddie View Post
Is that a rebadged Behringer unit? Looks very similar to one to me... but maybe my dodgy screen!

Nope, don't think so: Generalmusic - Wikipedia


Seem to be able to find the Lexus RX300 wiring diagram, but not this!
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Old 4th April 2020, 01:17 AM   #6
turk 182 is offline turk 182  Canada
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missing components could be options or components for a different model that uses the same PCB.


so your certain the amplifier is the problem?


in searching this myself i encountered links to meat grinders!
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Old 4th April 2020, 04:12 PM   #7
maxmix69 is offline maxmix69  Italy
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Thanks for your interest. The missing electronic components are due to unsuccessful repair attempts before buying them at the second-hand market. Here I have found some photographs of the complete electrical board, unfortunately they are not very clear and the value of the electronic components cannot be read.
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