Ricoh FT5535 Service Manual page 175

10.8 ADS SENSOR AUTOMATIC ADJUSTMENT (SP4-201)
When:
Purpose:
Adjustment standard:
How:
NOTE: Close the platen cover to prevent external light from reaching the ADS
sensor when performing this adjustment.
The adjusted ADS gain value and the sensor output can be monitored
with SP4-202. Refer to the SP mode table for details.
10.9 ADS DENSITY SELECTION (SP5-106)
When:
Purpose:
How:
SP5-106: ADS Density
0: Dark
1: Normal
2: Light
FSM
1. If the ADS sensor output voltage is not within
the adjustment standard after cleaning the
optics.
2. After replacing the following parts:
ADS board, Exposure lamp, RAM board on
the main control board.
3. If memory all clear (SP5-801) has been
performed.
To make sure that the ADS sensor functions
correctly.
ADS Voltage = 2.7 ± 0.1V
SP4-201 adjusts the ADS gain value in memory to
get the correct sensor output.
If copies are too light or dirty background appears on
copies in ADS mode.
To maintain good copy quality in ADS mode.
Use SP5-106. For example, for lighter copies, select
the "2: Light" setting (this increases the negative
development bias voltage).
5-59 FT5535/4527/4522