Epson Stylus CX8400 Service Manual Page 142
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EPSON Stylus CX7300/CX7400/DX7400/NX200/TX200 series/SX200 series/Stylus CX8300/CX8400/DX8400/NX400/TX400 series/SX400 series Revision C
ADJUSTMENT Adjustment Items and Overview 142
Confidential
5.1 Adjustment Items and Overview
This chapter describes adjustments required after the disassembly/reassembly of the
printer.
5.1.1 Servicing Adjustment Item List
The adjustment items of this product are as follows.
C H E C K
P O I N T
For information on how to carry out the adjustments and media
required for the adjustments, see the instructions displayed by the
Adjustment Program.
Table 5-1. Adjustment Items
Adjustment Item Purpose Method Outline Tool
EEPROM data copy
When the main board needs to be replaced, use this to copy adjustment
values stored on the old main board to the new board. If this copy is
completed successfully, all the other adjustments required after replacing the
main board are no longer be necessary.
Readout the EEPROM data from the main board before removing it.
Then replace the board with a new one, and load the EEPROM data to
the new board.
• Adjustment Program
Initial setting
This must be carried out after replacing the main board to apply settings for
the target market.
Select the target market. The selected market settings are
automatically written to the main board.
• Adjustment Program
USB ID input
This sets a USB ID of the printer. A computer identifies the printer by the ID
when multiple same models are connected via a USB hub.
Enter the product serial number of the printer. The ID is automatically
generated and written to the main board.
• Adjustment Program
Head ID input
This must be carried out after replacing the Printhead in order to enter the
new Printhead ID (Head ID) that reduces variation between Printheads.
Enter the ID printed on the Head QR code label attached on the
Printhead. The correction values are automatically written to the main
board.
• Adjustment Program
TOP margin
adjustment
This corrects top margin of printout. A top margin adjustment pattern is printed. Examine the lines printed
near the top edge of the printout, and enter the value for the line that
is exactly 3 mm away from the top edge.
• Adjustment Program
•Ruler
First dot position
adjustment
This corrects left margin of printout. The print start position in the carriage
moving direction is corrected by software.
A first dot adjustment pattern is printed. Examine the lines printed
near the left edge of the printout and enter the value for the line that is
exactly 5 mm away from the left edge.
• Adjustment Program
•Ruler
Head angular
adjustment
This must be carried out after replacing the Printhead in order to correct tilt
of the Printhead by software.
A head angular adjustment pattern is printed. Examine the printed
lines and enter the value for the most straight lines.
• Adjustment Program
Bi-D adjustment
This corrects print start timing in bi-directional printing to improve the print
quality.
A Bi-D adjustment pattern is printed. Black and color patterns are
printed for each of the five dot sizes (ECO, VSD1, VSD2, VSD3,
VSD4). So, there are 10 groups. Examine the patterns and enter the
value for the pattern with no gap and overlap for each mode.
• Adjustment Program
Initialize PF
deterioration offset
This resets the counter to maintain paper feed accuracy which decreases due
to paper dust.
Reset the counter to its default.
• Adjustment Program
Disenable PF
deterioration offset
When reading the counter value from the old main board is impossible in the
case of replacing the board, use this to set the counter to its maximum value.
Set the counter to tis maximum value (10000).
• Adjustment Program
CR motor heat
protection control
This must be carried out for efficient heat control of the CR motor.
Electrical variation of the motor and the power supply board are measured to
acquire correction values for them.
Select the parts that you replaced. The correction values are
automatically written to the main board.
• Adjustment Program
- SERVICE MANUAL 1
- PRECAUTIONS 3
- About This Manual 4
- Revision Status 5
- Contents 6
- Chapter 6 MAINTENANCE 7
- Chapter 7 APPENDIX 7
- Chapter 5 ADJUSTMENT 7
- PRODUCT DESCRIPTION 8
- 1.1 Features 9
- 1.2 Printing Specifications 10
- (H x V dpi) 11
- 1.2.4 Supported Paper 13
- 1.2.5 Printing Area 15
- 1.3 Scanner Specifications 15
- 1.3.1 Scanning Range 15
- (1 msec or less) 16
- (2 msec or less) 16
- 1.5 Interface 17
- 1.5.2 Memory Card Slots 18
- 1.6 Control Panel 19
- 1.7.1.4 Copy Speed 30
- 1.7.2.7 Print Layout 34
- <Borderless> 35
- <With Border> 35
- Paper top edge 35
- (USB Direct Print/PictBridge) 36
- USB Direct Print 37
- PictBridge 37
- 1.7.5 Setup Mode 39
- 1.7.5.8 Head Alignment 40
- OPERATING PRINCIPLES 41
- 2.1 Overview 42
- 2.1.2 Motors & Sensors 43
- 2.1.3 Printhead 44
- 2.1.3.1 Printing Process 45
- 2.1.3.2 Printing Method 45
- Carriage Unit 46
- Main Frame 46
- Timing Belt 46
- 2.1.5.2 Paper Feed Mechanism 51
- 2.1.6 Ink System Mechanism 52
- 2.1.6.3 Wiping Mechanism 53
- 2.1.6.4 Pump Unit Mechanism 54
- 2.1.7 Ink Sequence 55
- 2.2 Scanner Mechanism 56
- TROUBLESHOOTING 58
- W A R N I N G 59
- 3.2 Troubleshooting 60
- Scanner Carriage FFC 66
- Scanner Carriage Unit 66
- Compression Spring 2.36 68
- Change Lever 68
- Upper Paper Guide Unit 68
- Slit of the CR Encoder Board 69
- CR Scale 69
- CR Encoder BoardEncoder FFC 69
- PF Scale PF Encoder Sensor 70
- PE Sensor 70
- Connector Cable 70
- Paper Back Lever 71
- Extension Spring 6.4 71
- Extension Spring Retard 71
- Backside of ASF Unit 71
- Star Wheel Holder Assy 72
- Star Wheel Holders 72
- EJ Roller Unit 72
- Document Glass 78
- Backside of ASF 79
- Extension Spring 6.45 79
- Panel FFC 80
- PS Board 81
- Power Unit Cable 81
- PS Board Unit 81
- Seal rubber part 85
- Compression 85
- Spring 1.67 85
- CR movement 87
- PF Roller Unit 87
- LD Roller 88
- Front Paper Guide Unit 88
- Porous Pad Front Paper Guide 88
- Star Wheels 89
- DISASSEMBLY/ASSEMBLY 90
- 4.1.2 Tools 92
- 4.1.3 Work Completion Check 92
- Panel Unit 94
- LCD Unit 94
- 4.2 Disassembly Procedures 95
- Paper Support Assy 96
- Guide Pins 96
- Stacker Assy 96
- Document Cover 97
- ASF Cover 97
- 4.3.4 Scanner Unit/Hinge 98
- Confidential 100
- 4.4.1 Main Board Unit 101
- 4.4.2 Panel Unit/LCD Unit 103
- 4.4.3 Power Supply Unit 105
- 4.5.1 Printhead 107
- 4.5.2 CR Scale 109
- 4.5.3 Hopper 110
- 4.5.5 Left Frame 113
- 4.5.7 Star Wheel Holder Assy 116
- 4.5.8 EJ Roller 116
- 4.5.9 PF Encoder Sensor 117
- 4.5.10 PF Scale 118
- 4.5.11 PF Motor 119
- 4.5.12 CR Motor 120
- 4.5.13 Main Frame Assy 122
- 4.5.14 CR Unit 124
- 4.5.15 Upper Paper Guide 126
- 4.5.16 ASF Unit 126
- 4.5.17 Ink System Unit 128
- Waste Ink Tube 130
- Tube Stopper 130
- 4.5.18 Front Paper Guide 131
- 4.5.19 PF Roller 132
- 4.5.20 Waste Ink Pads 133
- 4.6.2 Scanner Carriage Unit 135
- Scanner Timing Belt 137
- Torsion Spring 137
- Scanner CR Holder 137
- 4.6.3 Scanner Motor Unit 138
- Stylus CX7300/TX200 series 139
- ADJUSTMENT 141
- C H E C K 142
- P O I N T 142
- 5.1.2 Required Adjustments 144
- 5.2.1 TOP Margin Adjustment 146
- 5.2.4 Bi-D Adjustment 148
- 5.2.5 PF Adjustment 148
- 34 56 782 149
- MAINTENANCE 151
- C A U T I O N 152
- Driven Pulley 153
- MAINTENANCE Overview 154 154
- MAINTENANCE Overview 155 155
- MAINTENANCE Overview 156 156
- MAINTENANCE Overview 157 157
- APPENDIX 158
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