Looking for laney rb5 circuit diagram

[Amptech47]

Hello all, I've been handed a laney rb5 combo for repair does any one have the schematic?

Thanks

[glebert]

There is a schematic for an RB8 in this thread, might be similar: https://music-electronics-forum.com/...t-power-module

[dmeek]

Here it is

Laney RB5.pdf

[oc disorder]

Check the + & - 15v rails. I have had several where either the Zener is faulty or sometimes as it gets hot there just the solder connections. If I have to replace the zener I usually do both
and not cut their leads short. Instead I make a small loop around a jewelers screwdriver and sit them off the board for better heat dissipation.