Epson Stylus CX3700 - Page 112

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A
DISASSEMBLY/ASSEMBLY Printer Section 112
 PF Scale Sensor positioning adjustment
Use the following procedure to confirm that the PF Scale is
positioned in the center of the PF Encoder Sensor.
1. Test fit the Main Board Unit, and confirm whether or not
the PF Scale is positioned in the center of PF Encoder
Sensor.
2. If the PF Scale is positioned in the
center of the PF Encoder
Sensor, adjustment is complete. If scale is not positioned in
center of sensor, adjust position of the PF Scale using
spacer (0.5mm thickness) as shown in the figure below.
Figure 4-20. PF Scale Sensor Positioning Adjustment
Right Side
Left Side
0.1 -
1 mm
Spacer
PF Scale
Spacer is not applied to the Main
Board Unit for service part.
 Place spacer between Shield
Board and Main Board.
 If PF Scale is off to the left,
remove the spacer.
 If PF Scale is off to the right,
add an additional spacer.
(Total of 2 spacers)
A D J U S T M E N T
R E Q U I R E D
After removing/replacing the Main Board Unit, perform the
adjustment in the following order. (Refer to Chapter 5
“ADJUSTMENT”)
 [When
it is possible to read data from the old board]
1. “EE
PROM Data Copy”
2. “PF
Scale Sensor Positioning Adjustment”
 [When
it is impossible to read from the old board]
1. “PF
Scale Sensor Positioning Adjustment”
2. “M
arket Setting”
3. “Head ID Input”
4. “Top Margin
Adjustment”
5. “Head An
gular Adjustment”
6. “Bi-
D Adjustment”
7. “F
irst Dot Adjustment”
8. “CR Offset”