I have had this A-1000 for about ten years but, for some reason, never got around to exploring it for DSBG. It started popping and crackling through the speakers so I brought it to the workbench for a DSBG overhaul.
One reason I'm posting is that the resistors near the DSBG can be hard to distinguish on the schematic. With glue on the resistor, the codes can be hard to see. Damaged resistors can read odd values. Blue can look like Gray and 6 can look like 8 on the schematic. One reason for the difficulty is that none of the carbon filament resistors are in the parts list.
Anyway, here are resistors and numbers that I replaced in case it helps someone.
All are Carbon Filament 1/4W 5% and about 6mm
R743 1.8k
R122 18k
R120 4.7k
R124 470r
R127 470k
One reason I'm posting is that the resistors near the DSBG can be hard to distinguish on the schematic. With glue on the resistor, the codes can be hard to see. Damaged resistors can read odd values. Blue can look like Gray and 6 can look like 8 on the schematic. One reason for the difficulty is that none of the carbon filament resistors are in the parts list.
Anyway, here are resistors and numbers that I replaced in case it helps someone.
All are Carbon Filament 1/4W 5% and about 6mm
R743 1.8k
R122 18k
R120 4.7k
R124 470r
R127 470k