Ricoh LDD250, Service Manual

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MASTER FEED SECTION
C262/C265 3-48 SM
5. Measure the voltage between pins TP701 (VHD) and TP702 (GND) on the PSU.
Check that it is b 0 and – 0.1 volts from the specified value that you
read from the decal in step 2.
6. If needed, adjust the voltage by turning RV1 [B] on the PSU.
NOTE: - To increase the voltage: Turn RV1 clockwise
- To reduce the voltage: Turn RV1 counterclockwise
7. Leave the SP mode.
3.7.16 MASTER END SENSOR ADJUSTMENT
Purpose: To ensure that the sensor detects the end mark (a solid black area) on
the master roll.
Standard: 0.8 volts
CAUTION: 1) The sensor adjustment is required in the following cases:
- When the sensor is replaced.
- When the ECU is replaced.
2) If the sensor is dirty, clean or replace it.
3) For how to access the SP mode, refer to the Service Program Mode
section. ( 5.3.1)
1. Turn on the main switch, then access SP6-004-2 (Sensor Voltage and
Threshold Adjustment for Master End Sensor).
2. The sensor threshold value is displayed on the operation panel. Enter 0.8
(volts) with the number keys.
3. Leave the SP mode.