- posted
9 years ago
Fender G-DEC of 2010
- Vote on answer
- posted
9 years ago
To save graunching the film ribbon, with sub-boards flopping around on the bench. This amp will give the analogue output,vol and tone change, without the display pcb connected, but with "computer hash" superimposed, but the SD/USB pcb needs to be connected via its sloppy connectors. At the input TL072 there are 2 SMD diodes D5 and D8 marked JV something, measuring forward .25V in circuit. With some low level heating , in that area from hot air, part of the analogue signal drops out. Resoldering those 2D and 4 nearby R, plus the traditional usual suspects, including the speaker (initially showed suspect VC tail/pigtail internal PbF problem perhaps) hopefully has trapped the problem