Oki C9500 Maintenance Manual page 127

5
Thick white lines / streaks or blurred color lines / streaks appear in the vertical direction (Fig. 5-2 F )
• Is the LED head dirty?
YES Clean the LED head.
• NO Is the LED head assembly connected to the connection board (Y73 PWB) properly?
NO Connect the LED head assembly to the connection board (Y73 PWB) properly.
• YES Check the cable connections, then replace the LED head assembly. Did the printer recover?
YES End.
• NO Check the cable connections, then replace the connection board (Y73 PWB). Did the printer
recover?
YES End
• NO Is the engine board (K7N PWB) connected properly to the connection board (Y73 PWB)?
NO Connected the engine board properly to the connection board.
• YES Check the cable connections, then replace the engine board (K7N PWB). Did the printer
recover?
YES End
• NO Is the I/D terminal connected properly to the contact assembly? (See Fig. 5-3)
NO Connect the I/D terminal properly to the contact assembly.
• YES Replace the image drum.
Note: 1. Remove EEPROM from the old board and set it on the new board upon replacing the
engine board (K7N PWB).
2. If EEPROM is not replaced, refer to section 3.2.2.
41956001TH Rev.6
Oki Data CONFIDENTIAL
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