Ricoh PRIPORT VT 2000 Series Service Manual page 247

28 February '91
6.4 MASTER EJECT SENSOR ADJUSTMENT: VT2300/VT2500
[B]
[A]
Purpose : To ensure that the sensor detects the ejected master.
1. Make a master that has a solid black area. The solid black area should
be approx. A7 size (74 x 105 mm/3" x 4")
NOTE: To prevent the thermal head from overheating, do not use a large
solid black original.
2. Insert the above master [A] between the upper and the lower rollers with
the master film side up and position the solid lack area under the sensor.
3. Confirm that the voltage between TP104 (MDLV) and the GND line
(CN103-5) on the main control board [D] (see next page) is correct (4.0 V
± 0.5 V).]
4. If the voltage is outside the acceptable range, adjust it by turning VR104
on the main control board.
NOTE: Light reflected from an unused master has the highest intensity.
Light reflected from that part of a used solid black master where the
film layer has been burned away has the lowest intensity.
Therefore, use a used solid black master for this adjustment so that
the sensor can detect the ejected master under the worst
conditions.
[C]
a. Set the original with the solid black area on the original table.
b. Press the Master Making key to make copies.
c. Stop printing when the image density of the solid black
area on the copies stabilizes.
d. Remove the master from the drum.
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