McIntosh C32 Recap
- Thread starter CohibaJoe
- Start date
Let's start a New thread on what you are doing. Then you can post pics on what this looks like.
I will look to see what is out there.
jblmar
JBL & marantz
Good idea, Joe.
Gregory
Soundco Kid
Question:. are you saying that reflowing the relay pins solved the cut-out problem?
If so, then GREAT, and you have a spare relay in store.
Gregory
Soundco Kid
I think you're going to have a NICE unit for a VERY long time there, and know how satisfying it is to update these amps as a project. For me, it's like going back to HS years (72-76), soldering-up caps, resistors and relays, drilling and punching chassis, etc. Same thing, same vintage.
Hey...though I'd pop-in Roger's C32 specs: http://www.roger-russell.com/preamps.htm#c32
Sure enough.. sold from 1977 to 81.
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Yes....Re-flow the relay connectors. What I noticed the Relay connector pins are not Tinned very well. I re-flowed the other connectors but
not the Relay. All good now.
I sent to Terry a MR-78 and will be getting in a MC-2105 (the Amp will be done by me).
musicgeorge
New Member
Hi all,
I know this is an ancient thread but want to ask a couple of questions, I need orientation in the process of my c32 recapping. a) I keep burning this resistor as soon as I power the preamp (look picture) board is from headphone monitor. Any thoughts?
And how do I access power supply caps, want to change these and main 4700uf caps.
Thanks!!!
I know this is an ancient thread but want to ask a couple of questions, I need orientation in the process of my c32 recapping. a) I keep burning this resistor as soon as I power the preamp (look picture) board is from headphone monitor. Any thoughts?
And how do I access power supply caps, want to change these and main 4700uf caps.
Thanks!!!
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musicgeorge
New Member
Thanks! Hope some c32 expert can help me located the problem and let me know how to access power supply caps.
You should probably locate a local Mac tech and have the amp repaired.
The main filter caps Mac used in the C32 are of the same design as they used in their power amp main supply caps......they seldom fail. Your local tech should be able to stress test them to verify their state. I did have one fail a month ago in a MA6200 so that might bring it up to 6 over 40 years.
The main filter caps Mac used in the C32 are of the same design as they used in their power amp main supply caps......they seldom fail. Your local tech should be able to stress test them to verify their state. I did have one fail a month ago in a MA6200 so that might bring it up to 6 over 40 years.
musicgeorge
New Member
Unfortunately no Mac techs nearby, if possible and reasonable want to avoid shipping the preamplifier.
musicgeorge
New Member
Yes, that is the question, was wondering if I had to access from the top and remove all the boards, so I can access from the under side then?
clinic-audio
all on YAMAHA untill 1990
Hello
Sorry but I don't understand why it is so complicate .........I have refixed more than 30 C32
Headphone amp is easy to delete :
- 2 screws on the left side (if the panel is in front of you )
- all connectors need to be unpluged
your burned resistor means to me :
-one TO92 in short circuit
- one (minimum) output transistor in same condition . Beware they are darlington type , do not use sub or normal transistor . Contact the factory they have the right parts for your repair .
If you think that you are not able to do it , you can always send your defective board !
Sorry but I don't understand why it is so complicate .........I have refixed more than 30 C32
Headphone amp is easy to delete :
- 2 screws on the left side (if the panel is in front of you )
- all connectors need to be unpluged
your burned resistor means to me :
-one TO92 in short circuit
- one (minimum) output transistor in same condition . Beware they are darlington type , do not use sub or normal transistor . Contact the factory they have the right parts for your repair .
If you think that you are not able to do it , you can always send your defective board !
musicgeorge
New Member
Many thanks clinic-audio, I really appreciate this orientation on the burnt resistor. Regarding the access, I was referring to the power supply caps, did not want to disconnect things before knowing if I could access these more easily, but now I know I need to access them from the bottom cover.
