ok i have been working on a 1999 marshall G30R CD solid state amp and im almost finished with it only needing to replace 2 input jacks on it but i have ran into a rather perplexing issue.
ok so here is hte deal, it all works EXCEPT for a volume issue on the clean channel. the issue with the volume is that when the pot is set to 0 ( i might add it is a brand new 1 meg pot as speced in the schematic) it still has volume.
im wondering if anyone might know what might be going on? could it be the 4558 op amp?, cap in the circuit? resistor in the circuit? i have checked all the resistors in the clean section of the schem and they all seem to be good, i do not have the means to test caps or IC's.
i have been scouring the web for the better part of a week and all i can find of people with still having volume with the pot to 0 are all discussing guitar wiring.
please any help would be appreciated
ok so here is hte deal, it all works EXCEPT for a volume issue on the clean channel. the issue with the volume is that when the pot is set to 0 ( i might add it is a brand new 1 meg pot as speced in the schematic) it still has volume.
im wondering if anyone might know what might be going on? could it be the 4558 op amp?, cap in the circuit? resistor in the circuit? i have checked all the resistors in the clean section of the schem and they all seem to be good, i do not have the means to test caps or IC's.
i have been scouring the web for the better part of a week and all i can find of people with still having volume with the pot to 0 are all discussing guitar wiring.
please any help would be appreciated