GBC eWire Service Manual page 382

Procedure
1. Do GP 6.3.2 SENSORS Procedure. Check to make sure all sensors
show "0" on the LCD when unblocked and "1" when blocked.
If any sensor shows "1" when unblocked, clean that sensor. Also
check if there is any obstacle in the sensor path.
All sensors show "0" when uncovered and "1" when covered
Yes- Return to the RAP that directed you here.
No- Go to Step 2
2. Make sure the sensor wire is connected securely at the Sensor and at
the Main Control Board (PL 5.27). Do REP 1.5 to remove the Rear
Cover to gain access to the connector at the Control Board. Refer to
Section 7 Wiring and GP 6.22
All the connections are made securely
Yes- Go to Step 3
No- Make the connection and repeat Step 1.
3. Replace the Sensor with a new one (alternatively, swap the sensor in
the faulty position with a sensor from a different good position to
check if it is a bad sensor).
Replacing the sensor corrects the issue
Yes- Use the new sensor and return to normal operation
No- Go to Step 4
4. Visually inspect the Cable from the sensor all the way to the Control
Board (PL 5.27). If the Cable is damaged, replace the Cable. See
Section 7 and GP 6.22 for cable part numbers and locations.
Sensor cable looks okay
Yes- Go to Step 5
No- Go to Step 6
5. Do GP 6.3.7 FIRMWARE UPGRADE Procedure to Re-flash the
firmware for the eWire.
Re-flashing firmware clears the fault
Yes- Resume normal operation
No- Go to Step 7
6. Do REP 11.1 or REP 11.3 to replace the Main Control Board (PL
5.27).
This clears the fault
Yes- Resume normal operation
GBC eWire
to find the Cable termination locations.
No- Escalate to second level
01/26/2018
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General Procedures and Information