Hey all, long time guest, first time poster in this forum.
My labor of love is my Rowe R1/2. Found her in the back of a mates garage. Pub fresh with a layer of storage dust. Nothing worked.
So far I've rebuilt the PSU, attended to the computers, serviced the mechanism, etc. Now she turns on, selects a record, plays it and returns it. Beautifully.
However I'm yet to get sound out of her for more than a couple of records. This amp is just something I can't get my head around. At this point the problem lays with the driver boards (402-06316). Both fuses where gone when I got to it and showed signs of liquid damage. So i pulled them out and replaced the caps and diodes. Everything else tested ok except the R24 trimpots (shorted). So replaced. New output transistors sourced (MJE6041, MJE6042) and installed.
No level of tinkering has made this work. I don't understand the effect the R24 trimpots have on this circuit, but i know its substantial. Can anyone offer advice on these boards? Do i need to bias the new MJEs? How? What should R24 be set to? I've only got a few sets of MJEs left, and even less hair.
Any help would be appreciated. Cheers, Danny - from Australia.