Oki 4M - Manual (Page 88)

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6 A blank paper is output.
• Is the contact plate of the transfer roller in correct contact with the high-voltage power supply
board?
• No Contact the contact plate of the transfer roller correctly.
• Yes Replace the transfer roller.
• Has this error been recovered?
• Yes End
• No Is the terminal of the EP unit in correct contact with the contact plate? (See Figure
6-4 A B C D E and Figure 6-5 A B C D E .)
• No Contact the terminal of the EP unit correctly.
• Yes Replace the EP unit.
• Has this error been recovered?
• Yes End
Caution: After replacing the EP unit, reset he drum counter. (Refer to
"Rplacing the Drum Cartridge" in "Users Manual".)
• No Is the LED head installed correctly? (Check the CN6 connector the main control
board.)
• No Contact the LED head correctly.
• Yes Replace the LED head
• Has this error been recovered?
• Yes End
Caution: Set the LED head drive time when replacing the LED head. (See
Section 4.2.1.)
• No Replace the main control board or high-voltage power supply board.