65 Amps London Pro trouble

[goldenGeek]

I was unsure if this should go in the Marshall or Vox-category, but I guess this amp has the most in common with the 18W Marshall? Anyway, here is todays problem:

I recently got my hands om a second hand London Pro wiith some issues (actually a friend owns it, but I have got it on my bench right now for repair). The seller sold it as "dead". After some investigation i found out that the bridge rectifier (PBPC602) and the attatched cables was severely burned, I think that rectifier is used for the switching circuit (relays and LDRs). After replacing that with another bridge rectifier I had around its back alive, but I suspect there is a reason the rectifier burned in the first place. The amp is relatively okay (sounds great by the way) on the separate channels but if you attatch a footswitch or go to the cascaded channels setting it is very noisy. I guess I could start replacing parts and I suspect there is something going on in the relay/LDR-section, but it would save me days of work if I had some kind of schematic. Does anyone have the schematics for this one?I haveput up a couple of videos if you're interested in seeing/hearing the problem: https://drive.google.com/open?id=1OQPRS ... zVuHsNWKI

regards
Jostein

[chief mushroom cloud]

contact Mike Francischini
https://www.yelp.com/biz/classic-amp-re ... -hollywood
he helped develop this amp

[Mark]

Did you ever get a circuit diagram for the amp and fix it?

Regards

Mark