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MX1000 in need of repair
- Thread starter skiracer
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The Yammi-God just replied to you above. He’s the one to send your unit to… if he has bench room.
Do you know which channel "Chernobyl'd"? Popped and smoked?
Neah, Chernobyl'd already it sounds like.
that might be a bigger issue than just the Chernobyl
We want to see her naked bottom
Can you post some photos from the bottom of that channel… bottom cover off?
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well, Chernobyl'd
This means you will find a chain of fried parts, likely on this amp board here but also possibly on the HCA main board on the other side. Not an easy repair but it can be done.
The good thing is that replacement parts are available and with better specs than the original in most cases. Hopefully Dave finds bench time for you
did you try to disassemble the large transistors from the heatsinks? or you just opened the amp up for us to see the photos?
In picture 4 I have the impression that the driver on the left is cracked.
Pavel
Gents:
I did not try to disassemble anything other than remove the bottom panel for photos.
The middle left transistor is definitely grenaded:
I've looked at the rest of the board and didn't see any really obvious smoke marks or black components. There were several partially discolored resistors but I don't know if that means they are blown:
Any other specific components you'd like for me to photograph?
Thanks for all the assistance guys!
I did not try to disassemble anything other than remove the bottom panel for photos.
The middle left transistor is definitely grenaded:
I've looked at the rest of the board and didn't see any really obvious smoke marks or black components. There were several partially discolored resistors but I don't know if that means they are blown:
Any other specific components you'd like for me to photograph?
Thanks for all the assistance guys!
that is very concerning. Your amp is missing all screws that are supposed to hold down the power transistors so that power dissipation is properly transferred to the heatsinks.
Who the F**K worked on this unit before?
It this is truly he case one of the most plausible reasons for the Chernobyl is thermal runaway as thermal management was severely compromised.
The resistor is toast. That 4.3v zener is highly likely toast...not by the way it looks but based on the typical Chernobyl'd typical suspects. And there will likely be more not visible to the naked eye. Again, all replacement parts are available but getting someone who truly knows these units to work on it will be your challenge. If Dave does not have bench time then wait for him or someone else who is qualified, so that you do not end up with more damage to the unit.
As it stands right now, your unit if fully rebuild-able. Let some other moron work on it like the guy who did not put the power transistors screws back , and you might end up with a boat anchor.
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And the plot thickens.
