Ricoh C211 Service Manual page 146

6.4 MASTER EJECT SENSOR ADJUSTMENT: VT2300/VT2500
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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 (74x 105 mm/3° x 4")
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.
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 TPI 04 (MDLV) and the GND line
(CNI 03-5) 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 VRI 04 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.
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