Service of a Laney VH100R
A Laney head in nice condition but has a problem with output volume going up and down.
Looking on the inside reveals one problem.
Capacitor C13 for the clean channel preamp is on the loose.
Turning the circuit board around to resolder the capacitor reveals the solid state components in the amp, mainly for the channel switching. A bit dirty so some cleaning.
The main problem with the amp was located in the Line In/Power amp in jack on the back of the amp. All the preamps signals are summed through the closing contact on that jack. Again, some cleaning solved that issue.
Last thing a much needed bias set, the Sovtek 5881 tubes wa running way cold.
