L1800 Revision A
Troubleshooting Overview 21
Confidential
At power-on 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.
Sensor FFC 1. Check that the Sensor FFC is connected to the CR Encoder
Sensor Board connector and Main Board connector CN9.
1. Connect the Sensor FFC to the CR Encoder
Sensor Board connector and Main Board
connector CN9.
2. Check the Sensor FFC for damages. 2. Replace the Sensor FFC with a new one.
At power-on, the PF Roller
rotates fast about a half turn.
PF Encoder
Sensor Holder
1. Check that the PF Encoder Sensor Holder is mounted correctly. 1. Install the PF Encoder Sensor Holder
correctly.
2. Check that the FFC of the PF Encoder Sensor is securely
connected to the PF Encoder Sensor Board connector and Relay
Board connector CN6.
2. Connect the PF Encoder Sensor FFC to the PF
Encoder Sensor Board and Relay Board
connector CN6.
3. Check the PF Encoder Sensor for paper dust, etc. 3. Remove the paper dust, etc. from the PF
Encoder Sensor.
4. Check if the PF Encoder or the FFC is damaged. 4. Replace the PF Encoder with a new one.
Table 2-7. Troubleshooting of Fatal Error
Occurrence
Timing
Phenomenon Detail
Faulty Part/
Part Name
Check Point Remedy
CR Encoder Sensor
Board connector
PF Encoder Sensor
Board connector
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