Re: Revox B252 Preamp
I got some time in at it tonight.
There is a small postage-stamp board with a single IC on it and a twisted pair of wires running off down to the lowest level. The edge of this board meets the main CPU board and has three connections to it in the vicinity of pin 12 of the CPU. Two of the connections had broken, and had broken through connections on the cpu board.
Some careful soldering under the microscope restored things.
Fingers crossed, I put the boards back together.
No difference.
I need now to probe the remote cpu board while it's all together and running, but access is impossible. I may need to dismantle, solder on a test wire, reassemble and only then get the scope on the added wire. Could be tedious, but enough for today.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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