Oki ES5112dn Maintenance Manual page 37

-1 Fuser Fan Error (Error 127)
• Is the exhaust fan rotating?
• Yes Replace the main board.
• No Is the CN2 connector of the high-voltage power supply unit
connected to the board properly?
•No Connect the CN2 connector appropriately.
• Yes Replace the exhaust fan or main board.
-2 Drum Fan Error (Error 128)
• Is the drum fan rotating?
• Yes Replace the main board.
• No Is the DFAN1 connector of the main board connected to the
board properly?
•No Connect the DFAN1 connector appropriately.
• Yes Replace the drum fan or main board.
-3 Power supply unit Fan Error (Error 122)
• Is the power supply unit fan rotating?
• Yes Replace the main board.
• No Is the PWFAN2 connector of the main board connected to the
board properly?
•No Connect the PWFAN2 connector appropriately.
• Yes Replace the power supply unit fan or main board.
2. Procedures for Repairing
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