Epson Stylus CX8400 Service Manual Page 88
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- TROUBLESHOOTING
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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
TROUBLESHOOTING Error Indications and Fault Occurrence Causes 88
Confidential
• Print start position
slip
The printing operation is correctly
performed. But, the top margin is
insufficient than usual one.
ASF Unit
1. Check if any paper dust is not adhered to the surface of
the LD Roller.
1. Set a cleaning sheet in the ASF up side down.
Then holding the top edge, try to load the paper
from the Printer driver. The micro pearl on the
LD Roller surface is removed. To remove
severe smear, staple a cloth moistened with
alcohol to a post card and clean the roller in the
same manner. As for the cleaning sheet, refer to
“ Check point for Paper out error according to
each phenomenon ” (p.75).
* If the problem is not solved, replace the ASF
Unit with a new one.
• Ink stain of paper
Ink stain occurs at the back, top end or
bottom end of the print paper.
Front Paper Guide
1. Check if the Front Paper Guide Unit is free from ink
stain.
1. Clean the Front Paper Guide Unit with a soft
cloth.
2. Check if heaps of ink are not formed on Porous Pad Front
Paper Guide.
2. Replace the Front Paper Guide Assy with a new
one.
EJ Roller Unit 1. Check if the EJ Roller Unit is free from ink stain. 1. Clean the EJ Roller Unit with a soft cloth.
PF Roller Unit 1. Check if the PF Roller Unit is free from ink stain. 1. Clean the PF Roller Unit with a soft cloth.
Table 3-22. Check point for the defective printing quality
Print Quality State Detailed phenomenon
Defective
unit/part name
Check point Remedy
LD Roller
Front Paper Guide Unit
Porous Pad Front Paper Guide
- 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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