No Bus Bias

Tests 1 - 4:

Tests 5 - 8:

SYMPTOM
NO BUS BIAS

POSSIBLE CAUSES
- DRB OR DRB cable
- Open ground circuit at DLC cavity 4
- Open ground circuit at DLC cavity 5
- CCD bus(+)/(-) circuit shorted to ground
- MIC ground circuit open
- CCD bus (+) open to MIC
- CCD bus (-) open to MIC
- MIC