Scanner Section; Original Registration Sensor Adjustment - Ricoh C217 Service Manual

1. SCANNER SECTION

1.1 ORIGINAL REGISTRATION SENSOR ADJUSTMENT

PURPOSE: To ensure correct sensor detection for originals, obtain the
correct light intensity of the sensor (light emitter side).
ADJUSTMENT STANDARD:
3.4 volts or more when 80 g/m
exposure lamp turns on. (It should be between 0.25 and 0.50
volts when there is no paper and light.)
CAUTION: This adjustment is required when the upper original
registration sensor (light receiver), lower original
registration sensor (light emitter), or the main PCB has
been replaced.
1. Turn off the main switch and disconnect the power plug.
2. Remove the front cover (4 screws).
3. Connect the power plug, and turn on the main switch to access the
output mode. (Turn on the main switch while holding down the Print
Start, Stop, and Clear keys together. Then, press the Memory/Class key
once to indicate "00" in the memory display.)
4. Measure the sensor (light receiver) output voltage between TP104
(grounding) and CN110-5 on the main PCB. It should be between 0.25
and 0.50 volts. (0.375 volts is the target.)
5. If it is not correct, adjust the sensor (light emitter) output by turning
VR102 on the main PCB.
SM
2
white paper is placed and the
5-1 C217