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
it.
• Replace PF motor.
• Replace MAIN board.