Oki C7400 Maintenance Manual page 120

9
Color Misalignment
• Is the color menu of the user menu mode "Automatic Color-Registration Adjustment" OFF?
Yes Make it on. Recovered?
Yes End
• No "TONER LOW" is displayed.
Yes Replenish toner. Recovered?
Yes End
• No Execute the color registration test in the engine maintenance mode.
Procedures: Enter the self-diagnostic mode (Level 1) of the engine maintenance mode.
Press Keys (0) and (4) to enter the self-diagnostic mode (Level 2).
Press Key (1) three times to display "REG ADJUST TEST".
Press Key (2) once to display "REG ADJUST EXECUTE".
Press Key (3) to execute automatic color-registration adjustment.
(The motor starts rotating to adjust color-registration.)
• Color registration was not adjusted (that is, the motor did not rotate) and "OK" was displayed
immediately.
Yes Some error other than color misalignment has occurred. After recovering from the error, has
the color registration become normal?
Yes End
• No "NG CALIBRATION LEFT/RIGHT" is displayed.
• Yes
(A)
41316401TH Rev.9
DIAGNOSTIC MODE
XX.XX.XX
ENGINE DIAG LEVEL2
REG ADJUST TEST
REG ADJUST EXECUTE
Is the color-registration sensor cover stained?
Yes The sensor cover surface is not cleaned appropriately by the cleaning
blade on the back of the shutter. Replace the shutter and sensor cover
to ensure suitable cleaning performance.
Oki Data CONFIDENTIAL
120 /