Oki 4M - Manual (Page 89)

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7 Poor fusing
• Is the specified paper being used?
• No Use the specified paper. (xerox 4200 (20 lbs))
• Yes Is the bias spring normal? (Tension: 2.5 kg)
• No Replace the bias spring.
• Yes Are the heater connector of the heat assy and the CN1 connector of the power
supply unit connected correctly.
• No Connect the connectors correctly.
• Yes Replace the heat assy.
• Has this error been recovered?
• Yes End
• No Replace the main control board or high-voltage power supply board.