Epson B 1100 Service Manual

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6. .Press the Driven Pulley toward the center to loosen the CR Drive Belt, and 
remove the CR Drive Belt from the CR Motor Pinion Gear.
Figure 4-149. Removing the CR Motor
7. Remove the two C.B. M3 x 4 screws that secure the CR Motor, and remove the CR 
Motor from the Main Frame.
Figure 4-150. Removing the CR Motor
CR Drive Belt
Driven Pulley
CR Motor Pinion Gear
21
19) C.B. M3x4
(4±0.5 kgf.cm)
Make the Lot No. printed surface on the CR Motor face the 
direction shown in the figure below.
Figure 4-151. Reinstalling the CR Motor
Tighten the screws in the order shown in Figure 4-150




After replacing the CR Motor, always make the required adjustments 
referring to the following.
“Chapter 5 Adjustment (p.128)”
Lot No. Printed Surface 
						

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4.5.2  PF Motor
1. Remove the Printer Mechanism. (Refer to 4.4.4 Lower Housing / Printer 
Mechanism (p.86).)
2. Disconnect the PF Motor connector cable from connector CN116 (black) on the 
Main Board, and remove it from the Clamp on the Main Frame.
3. Remove the two C.C. M3 x 4 screws that secure the PF Motor.
4. Remove the PF Drive Belt from the PF Motor Pinion Gear, and remove the PF 
Motor from the Printer Mechanism.
Figure 4-152. Removing the PF Motor
1
2
PF Motor connector cable
Clamp
PF Drive Belt
CN116
PF Motor
Pinion Gear11) C.C. M3x4
(4±0.5 kgf.cm)




Make the slit on the PF Motor face the direction shown in the 
figure below.
Figure 4-153. Reinstalling the PF Motor
Tighten the screws in the order shown in Figure 4-152




After replacing or removing the PF Motor, always make the required 
adjustments referring to the following.
“Chapter 5 Adjustment (p.128)”
Slit 
						

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4.5.3  ASF Motor
1.Remove the Upper Housing / Printer Cover. (p.72)
2. Remove the Earth cable. (refer to 4.4.6 ASF Assy Step2 (p96) .)
3. Release the ASF Motor cable from the cable hook and disconnect the relay 
connector.
4. Remove the two C.B.P. M3 x 8 screws that secure the ASF Motor and remove the 
ASF Motor.
Figure 4-154. Removing the ASF Motor
Secure the grounding wire and the ASF Motor together with 
the screw in the middle of the printer. 
Tighten the screws in the order shown in Figure 4-154
Cable HookASF Motor4) C.B.P. M3x8
1
2
Earth cable
Attach a piece of acetate tape (60 mm) on the ASF Motor Cable 
as shown below.
Figure 4-155. Attaching acetate tape
ASF Motor Cable
Acetate tape
60mm 
						

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Disassembly And Assembly Removing the Sensors 124
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4.6  Removing the Sensors
4.6.1  CR Encoder
1.Remove the Carriage Shaft / Carriage Unit. (p.88)
2. Remove the two C.B.P. M2.6 x 5 screws that secure the CR Encoder Sensor 
Board.
3. Disconnect the PW Sensor FFC from the connector on the CR Encoder Sensor 
Board, and remove the CR Encoder Sensor Board.
Figure 4-156. Removing the CR Encoder Sensor Board
4.6.2  PF Encoder
1.Remove the Upper Housing / Printer Cover. (p.72)
2. Disconnect the FFC from the PF Encoder Sensor Board.
3. Remove the C.B.S. M3 x 8 screw that secures the PF Encoder Sensor Holder.
Figure 4-157. Removing the FFC and the Screw that Secures
the PF Encoder Sensor Holder
PW Sensor FFC
Connector
13) C.B.P. M2.6x5
(2±0.5 kgf.cm)
CR Encoder
Sensor Board
PF Encoder Sensor Holder
5) C.B.S. M3x8
(6±1 kgf.cm)
Connector
FFC 
						

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4. While pressing the guide pin on the PF Encoder Sensor Holder using tweezers, 
slide the holder upwards to release the three tabs, and remove the PF Encoder 
Sensor Holder.
Figure 4-158. Removing the PF Encoder Sensor Holder4.6.3  PW Sensor
1.Remove the Carriage Shaft / Carriage Unit. (p.88)
2. Remove the C.P.B. (P1) M1.7 x 5 screw that secures the PW Sensor Holder, and 
remove the PW Sensor Holder from the Carriage Unit.
Figure 4-160. Removing the PW Sensor Holder
3. Disconnect the PW Sensor FFC from the PW Sensor connector, and remove the 
PW Sensor.
Figure 4-161. Removing the PW Sensor
Make sure that the PF Scale is in the slit on the PF Encoder Sensor.
Figure 4-159. Reinstalling the PF Encoder Sensor Holder
Guide pin
Tabs
PF Encoder Sensor
PF Scale
Slit
PW Sensor Holder
12) C.P.B. (P1) M1.7x5
(0.8±0.2 kgf.cm)
Carriage Unit Bottom Side
PW Sensor
Connector
PW Sensor FFC 
						

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4.6.4  PE Sensor Holder
1.Remove the ASF Assy. (p.96)
2. Remove the PE Sensor connector cable from the five tabs on the Release Holder 
Assy and the two tabs on the Head Cable Cover.
Figure 4-162. Releasing the Cables
3. Release the tabs that secure the PE Sensor Holder from the notch on the Main 
Frame with a flathead screwdriver, and slide the PE Sensor Holder upwards and 
then remove it toward you.
Figure 4-163. Removing the PE Sensor Holder
Make sure that the PW Sensor FFC is routed as shown in Figure 
4-161




After replacing or removing the PW Sensor, always make the required 
adjustments referring to the following.
“Chapter 5 Adjustment (p.128)”PE Sensor connector cableTabs
Release Holder Assy
Tabs
Head Cable Cover
PE Sensor Holder
Front Side
Tab 
						

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4.6.5  Cover Open Sensor
1.Remove the Panel Unit. (p.69)
2. Remove the C.B.P. M3x10 screw that secures the Cover Open Sensor and remove 
the Cover Open Sensor.
Figure 4-165. Removing the Cover Open Sensor
Align the four tabs and guide pin on the PE Sensor Holder with the 
positioning holes on the Main Frame correctly so that there is no 
gap between the PE Sensor Holder and the Main Frame.
Figure 4-164. Reinstalling the PE Sensor
Guide Guide pin
Tabs
Align the guide pins with the positioning holes shown in Figure 
4-165.
Guide pins and 
Positioning holes
Cover Open Sensor
1) C.B.P. M3x10
(6±1 kgf.cm) 
						

							Confidential
CHAPTER
5
ADJUSTMENT 
						

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Adjustment Adjustment Items and Overview 129
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5.1  Adjustment Items and Overview
This chapter describes adjustments to be made after the disassembly/reassembly of this product.
5.1.1  Servicing Adjustment Item List
The items, purposes and outlines of the Adjustment Program are given in the following table.
Table 5-1. Adjustment Items
AdjustmentPurposeMethod Outline
PF Belt Tension 
AdjustmentThis adjustment is made to reduce the load on the PF motor and 
to ensure paper feed accuracy.See ? 5.3.1 PF Belt Tension Adjustment ? (p.141).
PF Roller Shaft Center 
Support Position 
AdjustmentThis adjustment is made to compensate the deflection amount on 
the PF Roller Shaft and to maintain the appropriate paper feed 
amount.See ? 5.3.3 PF Roller Shaft Center Support Position Adjustment ? (p.146).
ASF Guide Roller LDs 
Position AdjustmentThis adjustment is made to optimize the positions of the LD 
Roller Shaft and Retard Roller in order to maintain the paper 
feed accuracy.See ? 5.3.5 ASF Guide Roller LDs Position Adjustment ? (p.150).
PG Adjustment This adjustment is made to ensure the correct distance between 
the head surface and the Front Paper Guide, and to adjust the 
parallelism between the 0 digit side and the 130 digit side to 
ensure consistent print quality.See ? 5.3.2 PG Adjustment ? (p.143).
EEPROM Data Copy This adjustment is made to read out the necessary information 
from the EEPROM using the D4 function. If this copy is 
completed successfully, all the other adjustments required after 
replacing the main board are no longer necessary.1. Select this function in the Adjustment Program.
2. Read out the data from the defective board.
3. After replacing the board with a new one, write the read data to the new board.
Initial Setting After replacing the Main Board, information common to Main 
Boards is written by market setting.1. Select and execute this function in the Adjustment Program.
2. Write the initial settings to the EEPROM.
USB ID Input A USB ID is given to each printer to identify a specific printer 
when using multiple printers of same model.1. Select this function in the Adjustment Program and enter the serial number of the printer.
2. The correction value is saved to the specific EEPROM address of the Main Board.
Head ID Input When replacing the Print Head, this adjustment is made to 
reduce head manufacturing variations, which may cause 
individual differences in print quality.1. Enter the ID of the Head QR Code Label (10 digits), which is applied to the Print Head, into the 
program.
2. The ID is stored in the EEPROM of the Main Board.
Supplement: Read the QR code label from left to right on the top row and from top to bottom in 
due order.) 
						

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Initialize PF 
deterioration offsetThe deterioration amount of the PF Roller Shaft is reflected to 
the paper feed correction amount. Every time a sheet of paper is 
fed, the deterioration amount is counted on the basis of the 
original counter value setting.When the PF Roller Shaft or 
Printer Mechanism has been replaced during repair, the PF 
deterioration counter must be reset.1. Select and execute this function in the Adjustment Program.
2. Reset the PF deterioration counter.
Disenable PF 
deterioration offsetThe PF deterioration compensation counter can be reset only 
when the PF Roller Shaft is new. To reduce the ancillary work in 
servicing, enter the maximum value (value for which 
deterioration compensation is not made) if the PF Roller Shaft 
has not been replaced.1. Select and execute this function in the Adjustment Program.
2. Reset the PF deterioration counter.
First dot position 
adjustmentThis function adjusts the print starting position in the CR main 
scanning direction.1. Select this function in the Adjustment Program and print the adjustment pattern.
2. Enter the value whose printed lines meet the adjustment pattern exactly 5 mm away from the left 
edge.
3. The correction value is saved to the specific EEPROM address of the Main Board.
PW adjustment This adjustment is made to correct the PW Sensor mounting 
position on a software basis to improve a paper detection error 
caused by the variation of the mounting position.1. Select this function in the Adjustment Program and print the adjustment pattern.
2. Select a pattern number 5mm away from each edge, and enter that number in the program.
3. The correction value is saved to the specific EEPROM address of the Main Board.
Head angular adjustment This adjustment is made to correct the error in the Print Head 
mounting position (Head angle) to make the nozzle line straight 
with respect to the paper feeding direction. Angular 
displacement is also checked for.1. Select this function in the Adjustment Program and print the adjustment pattern.
2. After checking the displacement amount of the pattern, enter the pattern number which has the 
smallest amount of displacement.
Bi-D adjustment This adjustment is made to correct the print timing in the go and 
return paths in bi-directional printing.1. Select and execute this function in the Adjustment Program.
2. Pattern printing and adjustment are automatically executed.
Supplement: Be sure to confirm that there are no dots missing before executing this adjustment.
BAND printing 
adjustmentThis adjustment is made to correct the mis-alignment of vertical 
lines and timing of printing at monochrome draft printing.1. Select and execute this function in the Adjustment Program.
2. Pattern printing and select the adjustment value, and write it to the specific EEPROM address on 
the Main Board.
PF adjustment This correction is made when the actual paper feed amount 
differs greatly from the theoretical value due to paper slip, PF 
roller tolerances, etc. during paper feed for printing.1. Select this function in the Adjustment Program and print the adjustment pattern.
2. Select or measure the adjustment value, and write it to the specific EEPROM address on the 
Main Board.
PF band adjustment This corrects variations in paper feed accuracy in the band print 
mode to achieve higher print quality.1. Select this function in the Adjustment Program and print the adjustment pattern.
2. Select the adjustment value, and write it to the specific EEPROM address on the Main Board.
Table 5-1. Adjustment Items
AdjustmentPurposeMethod Outline