Section 6: Maintenance &Troubleshooting
Spirit II User’s Manual
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13. Remove primary power from the Spirit system. Check cable continuity between the
chopper PCB and DSP PCB. Use a digital voltmeter set up to read resistance
(ohms) and make the following measurements:
Chopper (1) J1-1 to DSP J7-1
Chopper (1) J1-2 to DSP J7-2
Chopper (1) J1-3 to DSP J7-3
Chopper (1) J1-5 to DSP J7-4
Chopper (2) J1-1 to DSP J8-1
Chopper (2) J1-2 to DSP J8-2
Chopper (2) J1-3 to DSP J8-3
Chopper (2) J1-5 to DSP J8-4
Chopper (3) J1-1 to DSP J9-1
Chopper (3) J1-2 to DSP J9-2
Chopper (3) J1-3 to DSP J9-3
Chopper (3) J1-5 to DSP J9-4
If ALL of the continuity readings are good, replace DSP PCB.