We repair most types of guitar amp from Fender, Marshall, Mesa Boogie to more obscure brands. We perform guitar amp repairs, customer modifications and service to valve amps and transistor amps alike. We always repair with genuine manufacturers parts and can also offer alternative replacement parts where necessary. We have access to the schematic drawings and diagrams from most major manufacturers.
Typical faults listed below can be anything from blown components to broken connectors. We can diagnose these faults when we open up the amp and check with a meter / scope, but it is hard to say exactly what is wrong on the telephone. From experience we may have a guess whats wrong based on the symptoms but really need to have the unit on the bench to be sure. We charge a £35 bench charge to open up the amp and diagnose the fault. This is deductable agaisnt the repair if taken.
No Output : could be anything from power / output / preamp / speaker / switches / standby problems.
Revalve : worn valves, rebiased and checked.
Distorted output : Low power rails, blown op amps, incorrect biasing , faulty speaker.
Lack of Volume : Valves , output stage damaged. Input op amps blown, output transformer.
Intermittant output : Bad connectors , valve sockets , speaker problems
Noisey controls : New pots needed , clean existing pots
Blows valve resistors : Sometimes wrong transformer wiring ( 230v / 240v )
Blowing fuses : Dodgy Valves , S/C components , Faulty Transformers
No lights / power at all : Blown fuses, transformer, bridge rectifiers /standby problems
Buzzing sounds , rattles : capacitors , diodes , rectifiers , reverb units