Hello
Ok this is what I have done so far:
Replaced ALL electrolytic caps with new
Mended the balance (plus the 2 tone control) potentiometer slider pickups
Replaced all lamps with 15v 1w lamps
Replaced the 2 capacitors on the volume control board
Replaced both bridge rectifiers
This has left me with a much improved piece of equipment still exhibiting 1 problem - the volume goes pretty much instantly to max. The "UP" light is on full and the "DOWN" is very dim. HOWEVER - touching the "UP" control will dramatically LOWER the volume to probably 1/3 of max. It will also cause the "up" and "down" lights to balance out in brightness.
On TR23 I have 15.4v and on TR26 I have 12.3v - 12.3v being correct. Im afraid that is where my knowledge runs out, obviously something in the circuit prior to TR23 is allowing two much voltage through but beyond replacing components 1 at a time until I hit on the culprit Im a little lost as to how to quickly identify the culprit.
Any and all help much appreciated - I have many hours work in this unit both cosmetic and component and it is driving me nuts I can not crack this final problem so I can listen to it!
