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Mark Levinson 23.5 bias procedure
Mark Levinson 23.5 bias procedure
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Old 24th April 2014, 06:01 PM   #1
rastanearian is offline rastanearian  Canada
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Default Mark Levinson 23.5 bias procedure

I have just finished rebuilding my ML 23.5 and lacking a service manual I am reaching out to anyone who may be familiar with the bias procedure.
Rebuild may be a bit of a stretch since I only replaced the electrolytics and corrected a bad repair job.
Never the less, since other unskilled hands have been in this amp I will feel much better knowing it has at least been biased properly.

Thanks in advance.
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Old 25th April 2014, 03:16 AM   #2
rastanearian is offline rastanearian  Canada
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Anyone that has had the "pleasure" of looking inside this beast will appreciate what a giant PITA it is to take apart.
I would really appreciate it if someone could direct me to a service manual. I would like to button it up but want to be sure it is biased correctly.


Thanks
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Old 25th April 2014, 08:11 AM   #3
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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Maybe here will help;
mark levinson 23 power amplifier schematic Download page :: Schematics Unlimited
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Old 25th April 2014, 04:35 PM   #4
rastanearian is offline rastanearian  Canada
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Thanks.
I had found all but the one that had been redrawn. It seems the same fuzzy scans are everywhere I look.
I can't seem to find anything on the 23.5 directly. All I have found so far are for its predecessor the #23.
I will have to dig in to see the differences now that I have clear drawings of the #23.

In the mean time if anyone does come across an actual service manual, I would be in your debt.

Thanks,
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Old 14th February 2015, 05:17 AM   #5
Pinu is offline Pinu  India
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Hi I am also looking for the schematics of 23.5 mark Levinson
If you found a clear copy, please send to me on sanjiv@bigfoot.com

Many thanks
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Old 24th February 2015, 09:13 PM   #6
jonstanza is offline jonstanza  Portugal
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original ML23.5
..."espero ter ajudado"...

best regards
jon
Attached Files
File Type: pdf No23 5 Schematic AC7 5.pdf (863.4 KB, 257 views)
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Old 1st March 2015, 01:23 PM   #7
Pinu is offline Pinu  India
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Many thanks , would you have the bias settings to service the amp.

Thanks again.

Best regards
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Old 1st March 2015, 05:45 PM   #8
kouiky is offline kouiky  United States
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That amp was produced in what year?
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Old 2nd March 2015, 12:49 AM   #9
Pinu is offline Pinu  India
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I think 2000, thanks
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Old 2nd August 2015, 03:12 PM   #10
jacco vermeulen is offline jacco vermeulen  Netherlands
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ML23.5 : 1990-1995
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