L1800 Revision A
Troubleshooting Overview 20
Confidential
At power-on While the power-on sequence is
being executed, Fatal error is
displayed.
Relay FFC 1. Check that the Relay FFC is connected to the Relay Board
connector CN1 and Main Board connector CN5.
1. Connect the Relay FFC to the Relay Board
connector CN1 and Main Board connector
CN5.
2. Check the Relay FFC for damages. 2. Replace the Relay FFC cable with a new one.
At power-on, the Carriage Unit
moves away from the home
position and bumps against the
right of the Frame, then hits the
left of the Frame.
CR Scale 1. Check that the CR Scale is inserted in the slit of the CR
Encoder Sensor.
1. Insert the CR Scale into the slit of the CR
Encoder Sensor.
2. Check the CR Scale for damages and dirt. 2. Wipe off the dirt completely or replace the CR
Scale with a new one.
CR Encoder
Sensor Board
1. Check the CR Encoder Sensor for paper dust, etc. 1. Remove the paper dust, etc. from the CR
Encoder Sensor.
2. Check the CR Encoder Sensor Board for damages. 2. Replace the CR Encoder Sensor Board with a
new one.
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
Phenomenon Detail
Faulty Part/
Part Name
Check Point Remedy
CR Scale
CR Encoder
Sensor Board
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