Realistic MPA-100 Model#32-2023

Mace_Hacker · 09:44 PM

When I got this delivered I plugged it up and got nothing but the power light. So, I cracked it open and started poking around. First off I found signs of overheating on the preamp board along with a resistor that was disconnected on one side. I started taking the board loose so I could examine it better. I disconnected 4 wires. Stopped, and when I started again a week later I forgot which wires I took off from which post.... So now I am stuck. I can't even find the service manual to buy it, let alone find one to download. I'll work on that. When I got the board loose enough to flip it looked terrible. I'll definitely have to clean and re-solder it before I re-apply power to it. I didn't see any burnt traces though. Just a lot of corrosion. I am going to replace the two resistors where it looks burnt. That's all I think it might need. If any one has any schematics or knowledge of this amp I would appreciate the input.

Cheers!

DigitalJunkie · 29th October 2009, 02:43 PM

Angelfire doesn't allow external linking,try photobucket or some other pic hosting site.

sakis · 03:20 PM

i thing you are in a bit of a mess ....this will be not easy ....as about the schematic that will be twice as hard

only chance is to try hard

Mace_Hacker · 08:53 PM

Third try, this time using photo bucket.

Mace_Hacker · 29th October 2009, 08:56 PM

Quote:

Originally Posted by sakis

i thing you are in a bit of a mess ....this will be not easy ....as about the schematic that will be twice as hard

only chance is to try hard

I don't think I am in to much trouble. I only have three wires disconnected that I need to figure out. The rest I will carefully mark and document. This will be a nice amp when I finish!

dp19 · 23rd April 2010, 01:19 AM

Did you resolve your problem? I have a same amp like that here and I could take pics of the inside if you still need help.

Thanks
Denis

28th October 2009, 09:02 PM	#1
Mace_Hacker diyAudio Member Join Date: Feb 2008 Location: Charlotte,NC	Realistic MPA-100 Model#32-2023 When I got this delivered I plugged it up and got nothing but the power light. So, I cracked it open and started poking around. First off I found signs of overheating on the preamp board along with a resistor that was disconnected on one side. I started taking the board loose so I could examine it better. I disconnected 4 wires. Stopped, and when I started again a week later I forgot which wires I took off from which post.... So now I am stuck. I can't even find the service manual to buy it, let alone find one to download. I'll work on that. When I got the board loose enough to flip it looked terrible. I'll definitely have to clean and re-solder it before I re-apply power to it. I didn't see any burnt traces though. Just a lot of corrosion. I am going to replace the two resistors where it looks burnt. That's all I think it might need. If any one has any schematics or knowledge of this amp I would appreciate the input. Cheers! Last edited by Bas Horneman; 29th October 2009 at 09:44 PM. Reason: At the request of the poster.

29th October 2009, 03:17 PM	#3
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	i thing you are in a bit of a mess ....this will be not easy ....as about the schematic that will be twice as hard only chance is to try hard __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr Last edited by sakis; 29th October 2009 at 03:20 PM.

29th October 2009, 08:42 PM	#4
Mace_Hacker diyAudio Member Join Date: Feb 2008 Location: Charlotte,NC	Third try, this time using photo bucket. Last edited by Mace_Hacker; 29th October 2009 at 08:53 PM. Reason: Updating Links

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29th October 2009, 02:43 PM	#2
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Angelfire doesn't allow external linking,try photobucket or some other pic hosting site.

23rd April 2010, 01:19 AM	#6
dp19 diyAudio Member Join Date: Apr 2005 Location: bouctouche, NB	Did you resolve your problem? I have a same amp like that here and I could take pics of the inside if you still need help. Thanks Denis

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