Master Edge Sensor Adjustment - Ricoh LDD280 Service Manual

3.7.17 MASTER EDGE SENSOR ADJUSTMENT

Purpose: To ensure that the sensor detects the master properly.
Standard: 0.9 volts (within "+0.1" and "-0.1" volts)
CAUTION: 1) The sensor adjustment is required in the following cases:
-When the sensor is replaced.
-When the I/O board is replaced.
2) While adjusting, make sure to attach all exterior covers to avoid
external light.
3) Do not turn the VRs excessively.
4) If the sensor is dirty, clean or replace it.
5) For how to access SP mode, refer to the Service Program Mode
section. (
• Rear cover (
3.2.2)
• Master roll
NOTE: The master roll must not be installed for this adjustment.
2. Turn on the main switch, then access SP6-004-3 (Sensor Voltage and
Threshold Adjustment for Master Edge Sensor).
3. Press the Start key.
• The duct entrance plate opens automatically. The duct plate will stay open for
30 seconds, then it will close automatically.
• Do the adjustment (step 3) before the duct entrance plate closes.
• If you cannot complete the adjustment before the plate closes, then press
Start again to open the plate.
• You can also use SP 6-4-7 to adjust the sensor. In that case, when the plate
is open, 'TOP' will be shown on the display as white-on-black.
4. The sensor input voltage is displayed on the operation panel. Turn VR5 [A] on
the I/O board until the value is between 0.8 and 1.0 volt.
5. Leave the SP mode.
SM
5.3.1)
3-49
MASTER FEED SECTION
[A]
C262R026.WMF
C262/C265