Master End Sensor Adjustment - Ricoh C249 Service Manual

NOTE: When the voltage cannot be adjusted to the standard value, adjust the
threshold level of the 2nd drum master sensor. (SP6-53: 2nd drum master
sensor voltage)
Standard Value
Master present
2.0 ±0.1V

3.5.9 MASTER END SENSOR ADJUSTMENT

Ensures that the sensor detects the end mark (a solid black area) on the master
roll.
Standard: 1.8 volts (within "+0.1" and "-0.1" volts)
Tools: Circuit tester, the core of a used master roll (the core has no master)
[A]
• Rear cover (
3.2.2)
1. Connect the terminals of a circuit tester to TP101 and to a grounded place (e.g.
iron base).
2. Put a piece of master [A] on the used master roll.
3. Place the core of the used master roll inside the master-making unit, and close
the master-making unit.
NOTE: Insert the core so that the piece of master [A] faces towards the master
end sensor.
4. Connect the power plug, and turn on the main switch.
5. Measure the voltage with the circuit tester, and turn VR101 until the value
becomes between "-0.1" and "+0.1" volts from the standard value (1.8 volts).
SM
Threshold level (SP6-53)
1.0V
3-21
MASTER FEED
Standard Value
Master not present
Below 0.8V
TP101
VR101
C264