Ricoh VT3500, Руководство по обслуживанию

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8.3 CIRCUIT
When the forward Image Position key is pressed, CN103-2 goes to 22 V and
CN103-1 goes to 0 V, and the image positioning motor turns to advance the
paper feed timing.
When the backward Image Position key is pressed, CN103-1 goes to 22 V
and CN103-2 goes to 0 V, and the image positioning motor turns to move
back the paper feed timing.
The main PCB detects the image position by means of a 4 bit signal received
from the image position sensor. The image positioning motor turns off when
the image is at the selected position.
Nine different image position settings can be selected by pressing the Image
Position key.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
0 1 3 2 6 7 5 4 C D F E A B 9 8
b1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0
b2 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0
b3 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0
b4 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0
CN103-1
(+)
-2
(-1)
CN104-22
-23
-24
-25
-26
GND
1
2
3
4
5
b1
b2
b3
b4
M
+
Image Position
Motor
Main PCB
Image
Position
Sensor
shaft
Com
Not Used
b3
b2
b1
b4
(+) (+) 0
Image Position Area
1 = Connection ON
0 = Connection OFF
1 December 1993
2-90