Epson GT-1200, Service Manual

Page: 134 / 157

ADF Adjustment
Rev. A
5-9
5.1.3.2 EEPROM Initialize and Sensor Adjustment
This adjustment must be made after the control board unit is replaced.
The EEPROM on the control board stores values for sensor sensitivity and
scan stop position. Therefore, whenever you replace the control board,
you must perform EEPROM initialization, which is followed by the sensor
adjustment consecutively.
1. Set the ADF on the scanner.
2. Open the switch cover on the ADF and remove 1 screw securing the
rotary switch cover. Then remove the rotary switch cover.
3. Set the Dip-switches as shown below.
1 2 3 4 5
O N
O F F
4. Open and then close either the paper eject cover or the paper feed
cover. (The EEPROM initialization and sensor adjustment mode is set
with this motion.)
5. Press the push button directly attached to the control board to run the
adjustment program, and EEPROM initialization and the sensor
adjustment for each sensor are carried out.
5.1.3.3 Scan Stop Position Adjustment
This adjustment must be made to adjust the scanning position after the
document is transported into the ADF. It is performed by turning the rotary
switch located under the switch cover at the top of the ADF.
This adjustment, a user performable adjustment, must be separately
made for the single feeding and reverse feeding. The table below shows
the rotary switch settings and corresponding amount shifted.
Table 5-5. Switch Setting and Corresponding Shifting Length
Rotary Switch Setting Amount shifted (mm)
0 0 (Reference position)
(+) value 1mm / step
(-) value 1mm / step
CHECK POINT
ü ü ü ü
Adjustment for the single and reverse feedings
are made as follows:
[Single feeding] Made by controlling the rotational
number of the reverse motor after paper empty
condition is detected by the timing sensor.
[Reverse feeding] Made after paper empty
condition is detected by the reverse sensor