Ricoh FT4430 Service Manual page 169

16 April '88
Image Density Sensor Check and Adjustment
6.
NOTE:
ID sensor adjustment is required in the following cases:
- When the ID sensor/PTL board is replaced.
- When the main board is replaced.
When the drum has been replaced and Vsg is out of standard.
- When a problem with toner supply occurs and checking the ID
sensor shows that Vsg is not within specifications.
METHOD A: Readout from the CPU
1. Clean the following parts:
- Image density sensor
- Optics (Mirrors
- Charge corona wire with dry cloth
- Erase lamp unit
- Quenching lamp.
2. Place 2 or 3 sheets of paper (A3 or 11" x 17") on the exposure glass and
lower the platen cover.
3.
Confirm that the main switch is off and turn on DIP SW No. 1-1 and No. 1-
8 under the instruction cards on the operation panel.
reflectors, lens, and toner shield glass)
j
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