Ricoh Robin Service Manual page 93

24 June 1994
1.4 OPTICS
1. The position of following parts are very difficult to adjust. Do not adjust
them.
a) 4th/5th Mirror Home Position Sensor
b) Lens Home Position Sensor
c) Lens and 4th/5th Mirror Guide Rails
NOTE: Before removing a sensor bracket to replace a sensor, mark the
position of the bracket. Check the copy image (magnification and
focus)to confirm that the sensor bracket has been properly
repositioned.
2. Clean the exposure glass with glass cleaner and a dry cloth to reduce the
amount of static electricity on the glass surface.
3. When reinstalling the exposure glass, make sure that the red mark on the
edge of the glass is positioned on the right hand side facing upward. This
side has received a special treatment to make it smoother and generate
less static electricity. This is especially important when the DF is installed.
4. Clean the following parts with a dry cloth:
a) Lens and 4th/5th Mirror Guide Rails
b) Scanner Guide Plates
5. Only use a clean soft cloth damped with alcohol or water to clean the
mirrors and lens.
6. Do not touch the following parts with bare hands:
a) Reflectors
b) Exposure Lamp
c) Mirrors and Lens
7. Whenever one of the actions listed below needs to be performed, all the
following actions must be done in order.
a) Optics cleaning
b) SP95 (V Correction Reset)
L
c) SP48 (Light Intensity Adjustment)
d) SP56 (ADS Reference Voltage Adjustment)
8. Do not adjust VR401 on the AC drive board.
4-3
SERVICE REMARKS