Diagnosing a Fanuc Alpha Servo Module with a Blank Seven-Segment Display
If the seven segment display is totally BLANK (no dash, nothing) then:
Step 1
Unplug the JX5, JX1A, JX1B, ENC1, ENC2 and ENC3 cables (that should be all the new style Honda cables).
Step 2
Make sure the fuse on the front face of the 6096-H304 is good.
Step 3
Verify the 24v DC input on the bottom two wires of the cable into CX2A.
If the above three conditions are met, and the display does not have a dash then the servo modules needs replacing.
Note: For an Alpha i Servo Module to have a dash on the seven-segment display, the 24 Volts is applied to CXA2B.
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