Checks / troubleshooting:
1. Check error record in “Test : Record” in
self-diagnosis function.
2. Set endurance time to more than 50
times in “Life: PF Motor” in self-
diagnosis function to see if any errors
related to PF motor such as “PF motor
error” occurs.
3. Check “Encoder: PF” in “Check: Test” –
“Test: Encoder” in self-diagnosis
function.
• Turn PF connecting axle by hand and
see if value displayed on panel
changes as follows.
• Front feed direction: Increase
• Back feed direction: Decrease
4. PF encoder may be damaged.
5. PF encoder may be damaged.
6. MAIN board may be damaged.

Recommended actions:
Check connection of following connectors of
MAIN board .
• PF motor cable connector
• PF_ENC connector:
• Connector that is connecting PF
motor and PF motor relay
• Replace PF encoder.
• If Main power board is damaged,
Replace.
• Replace PF motor.
• Replace MAIN board.