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Request for help with mixer repair
Posted: Fri Nov 16, 2012 9:12 am
by ntblade
Bought a S/H Allen & Heath powered mixer ( see this -
http://billfitzmaurice.info/forum/viewt ... 28&t=18780 ) off ebay which turns out to have a lot of problems. The seller has said that he'll refund me at the end of the month although I'm not holding my breath!
Anyway, since I have a couple of weeks to wait I may as well try to find some time to see if I can repair it. Does anyone know where I can get a schematic / service manual?
It's a PA12-CP 1000W mixer.
Many thanks
Re: Request for help with mixer repair
Posted: Mon Nov 19, 2012 7:01 pm
by Grant Bunter
Tell us what the problems are!
Google is my friend.
http://www.allen-heath.com/UK/Products/ ... bset-tab-4
Page 33 of the user manual gives a block diagram. Or the block diagram is a seperate download.
This may be a service manual:
http://fileshare.eshop.bg/downloadsm/57 ... eries.html
Hope that helps...
Re: Request for help with mixer repair
Posted: Thu Nov 22, 2012 5:21 pm
by ntblade
Wow, thanks! How did I miss that?
That's the mixer alright, looks like a full schematic in the service manual from first glance.
The mixer has many faults although sometimes these can be traced to a few. I'll really need to get a proper diagnosis.
NTB
8o)
Re: Request for help with mixer repair
Posted: Thu Nov 22, 2012 5:53 pm
by maxo
keep us posted on how the troublehooting goes
you never know if another member will have something similar
and your findings can help the community
Re: Request for help with mixer repair
Posted: Sun Nov 25, 2012 4:52 pm
by ntblade
Will do. Need to gather some equipment. Have a working 'scope and will grab a PSU from the bay. Should be enough to get going.
NTB
Re: Request for help with mixer repair
Posted: Sun Nov 25, 2012 5:50 pm
by Grant Bunter
ntblade wrote:Will do. Need to gather some equipment. Have a working 'scope and will grab a PSU from the bay. Should be enough to get going.
Good grief man! Did you buy a boat anchor??
Re: Request for help with mixer repair
Posted: Mon Nov 26, 2012 4:30 am
by ntblade
Boat anchor! Almost.
http://tinyurl.com/bsp23cc
I'm trying to get a refund. Apart from not working, the carry handle is missing (not shown in photo) and the rack ears I was told were with it aren't.
I'm not holding out much hope of getting my money back so this might be a project for the winter.
The PSU I'm referring to is a bench type to power the mixer when being repaired as I'll have to remove the channel modules to check them individually.
NTB