Ricoh D104 Field Service Manual page 198

4. Replacement and Adjustment
3. Install the three screws [C] (removed in step 2) in the laser unit.
4. Reinstall the polygon mirror motor cover [A] (
Before removing the old laser unit
Do the following settings before removing the laser unit. These are adjustments for skew adjustment motors
in the laser unit.
1. Plug in and turn on the main power switch of the copier.
2. Enter the SP mode.
3. Execute SP2-220-001 to clear the Mirror-No.2 positioning motor setting for Cyan.
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4. Execute SP2-220-002 to clear the Mirror-No.2 positioning motor setting for Magenta.
5. Execute SP2-220-003 to clear the Mirror-No.2 positioning motor setting for Yellow.
6. Exit the SP mode.
7. Turn off the main power switch and disconnect the power cord of the copier.
Recovery procedure for no replacement preparation of laser unit
If you did not do the procedure in 'Before removing the laser unit' before removing the laser unit, you must
do the following.
1. Turn off the main power switch and disconnect the power cord of the copier.
2. Remove the left cover (see the following "Removing the laser unit").
3. Disconnect the harness [A] of the skew correction motor.
4. Do steps 1 to 7 of "Before removing the laser unit".
5. Connect the harness [A] and reinstall the left cover.
6. Plug in and turn on the main power switch.
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x 4).