No Bus Bias

Test 1 - 3:

Test 4 - 8:

SYMPTOM
NO BUS BIAS

POSSIBLE CAUSES
- Junction Block Fuse # 1 open
- Open Fused B(+) circuit
- DRB or DRB cable
- CCD Bus (+) open to MIC
- CCD Bus (-) open to MIC
- CCD Bus(+)/(-) circuit shorted to ground
- MIC
- MIC ground circuit open