AudioAficionado.org - Levinson Reliability???

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AudioAficionado.org (https://www.audioaficionado.org/index.php)

- Mark Levinson (https://www.audioaficionado.org/forumdisplay.php?f=181)

- - Levinson Reliability??? (https://www.audioaficionado.org/showthread.php?t=11637)

chessman

01-02-2012 11:45 PM

sonicbath, welcome aboard! :wave:

eadomin

05-15-2012 08:04 AM

Hello Lakesailor,

I own two Proceed HPA 3 (original owner), and have a problem with one of the amps. In my country, the Harman Kardon dealership has changed three times in the past five years. As you can imagine, the actual dealer does´nt even know the Proceed brand. I have a local technician that repairs amps but the schematics are needed. I would like to know if I can get this information from you.

Thank you,

eadomin

jimbracy

09-01-2012 05:55 PM

Quote:

Originally Posted by lakesailor (Post 246747)

The Levinson 43X series amps were all based on the Proceed HPA 2/3/5 series amps. When Madrigal shut down the Proceed HT division the HPA series of amps all underwent very minor revisions and became the Levinson 43X series. These amps had very tight operating tolerances and generally require servicing from a knowledgeable tech on a somewhat regular basis. They are excellent amps and are very dynamic. If you do buy the 433 and run into an issue I have the HPA schematics that I could send to you. From my experience this series of amps has no cap problems.

Hi, I've got an HPA 2 and it started going into protected mode. I have narrowed it down to the #2 amp board. Do you still have the schematics to the HPA? If so, could you share them with me? Thanks, Jim

Tru-Tech

09-23-2012 01:16 AM

Lakesailor,

I also would be very appreciative to have the HPA schematics. I currently have an HPA3 here on my bench that I am repairing and service information would most certainly be welcome.

Thank you in advance for any help you may be able to provide.

Ron

kosscher

09-07-2015 12:44 PM

Hello people, I know this subject is about ML but my question about its younger brother Proceed AMP5 which I have 2/5 died. Need your help and advice on how to fix.

Masterlu

09-07-2015 01:55 PM

kosscher... Welcome to AA! :wave:

kosscher

09-07-2015 02:15 PM

Thank you Masterlu! I promise to be a good guy.
BTW, you have very familiar to the Russian year name. :music:
Sorry for off topic

Masterlu

09-07-2015 02:30 PM

Quote:

Originally Posted by kosscher (Post 724625)

Thank you Masterlu! I promise to be a good guy.
BTW, you have very familiar to the Russian year name. :music:
Sorry for off topic

http://www.kenston.k12.oh.us/khs/stu.../4-29-13-b.jpg

:D

kosscher

09-09-2015 05:28 PM

I have one more question, if some one can help me with the answer.
What is the power capacitors spec in proceed hpa2/hpa3. Amp5 is 17000mF and 90v, 35mm diameter and 120mm height.

oldaudioman

12-07-2015 02:47 PM

Hello Lakesailor,

This may be beating a dead horse, but I too would like a copy of the Proceed HPA schematic, if you're still around. I have an HPA3 that has two channels not working and it has been pretty much mothballed for a couple years now. Before sending it in to a service center (I've used Pyramid in the past) I would really like to take a look at it myself in case the problem is something simple. The prices I've seen for fixing these things service centers are a little scary. Any information I can glean before actually tearing into it would be helpful. Thanks

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