Epson DFX-8500 Service Manual - PDF DOWNLOAD

Epson DFX-8500 Service Manual - PDF DOWNLOAD

FILE DETAILS:

Epson DFX-8500 Service Manual - PDF DOWNLOAD

Language :English
Pages :245
Downloadable : Yes
File Type : PDF

IMAGES PREVIEW OF THE MANUAL:

DESCRIPTION:

Epson DFX-8500 Service Manual - PDF DOWNLOAD

PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and
repair of DFX-8500.
The instructions and procedures included herein are intended for the experience repair technician,
and attention should be given to die precautions on the preceding page. The Chapters are
organized as follows:
CHAPTER 1. GENERAL DESCRIPTION
Provides a general product overview, lists specifications, and illustrates the main components of the
printer.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of printer operation.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
Includes a step-by-step guide for product disassembly and assembly.
CHAPTER 4. ADJUSTMENT
Includes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTING
Provides EPSON-approved techniques for troubleshooting.
CHAPTER 6. MAINTENANCE
Describes preventive maintenance techniques and lists lubricants and adhesives required to
service the equipment.
APPENDIX
Describes connector pin assignments, circuit diagrams, circuit board component layout and
exploded diagram.

TABLE OF CONTENTS:

Epson DFX-8500 Service Manual - PDF DOWNLOAD

DFX-8500 1
CHAPTER 1 7
11 FEATURES 9
12 SPECIFICATIONS 11
121 Printing Specification 11
122 Paper Feeding 14
123 Electrical Specification 14
124 Environmental Condition 14
125 Reliability 14
126 Safety Approvals 15
127 CE Marking 15
128 Acoustic Noise 15
129 Ribbon Cartridge 15
1210 Physical Specifications 15
1211 Printable area 16
1212 Paper and Media 20
12121 Continuous paper (Single sheet and multi-part) 20
12122 Labels 22
12123 Continuous Forms with Labels 23
12124 Overlapping Multi-part Form 24
12125 Perforation 24
12126 Notes 24
13 INTERFACES 27
131 Parallel Interface (Forward channel) 27
132 Parallel Interface (Reverse channel) 29
133 Serial Interface 30
134 Optional Interface 30
135 Interface Selection 31
136 Prevention Hosts from Data Transfer Time-out 31
14 OPERATING INSTRUCTIONS 32
141 Control Panel 32
1411 Switches 33
1412 Indicators 34
142 Errors and Buzzers 35
143 DIP Switch Settings 36
144 Functions 39
1441 Usual operation 39
1442 Operation at Power On 41
1443 Built-in Detection 42
145 Paper Memory Function 43
146 Initializations 44
1461 Power-on Initialization 44
1462 Software Initialization 44
15 MAIN COMPONENT 45
151 M-3I60 Printer Mechanism 46
152 Main Control Board (C204 MAIN Board) 47
153 C204 DRV Board 48
154 C204 DRV-B Board 49
155 C204 SUB Board 49
156 C204 PSB/PSE Board 50
157 Control Panel 51
158 Housing 51
CHAPTER 2 53
21 PRINTER MECHANISM OPERATION 55
211 Printhead Mechanism 58
212 Carriage Mechanism 59
213 Platen Gap Adjustment Mechanism 60
214 Paper Feed Mechanism 61
2141 Tractor Wire Operation 63
215 Ribbon Feed and Tractor Select Mechanisms 64
216 Plunger Mechanism 66
22 POWER SUPPLY OPERATION 67
221 Power Supply Overview 68
215 Ribbon Feed and Tractor Select Mechanisms 64
216 Plunger Mechanism 66
22 POWER SUPPLY OPERATION 67
221 Power Supply Overview 68
23 CONTROL CIRCUIT 71
231 Control Circuit Operation Overview 71
232 Reset Circuit 75
233 Sensor Circuits 76
234 CR Motor Drive Circuit 79
235 PF Motor Drive Circuit 83
236 RF Motor Drive Circuit 84
237 PG Motor Drive Circuit 85
238 Plunger Drive Circuit 86
239 Printhead Drive Circuit 87
CHAPTER 3 89
31 OVERVIEW 91
311 Precautions for Disassembly and Assembly 91
312 Tools 93
313 Specification for Screws 95
314 Service Checks After Repair 96
32 DISASSEMBLY AND ASSEMBLY 97
321 ROM Replacement 98
322 Printhead and Ribbon Mask Assembly Removal 99
323 Housing Removal103
3231 Top Cover Removal103
3232 Left, Right, and Front Covers Removal and Fuse Replacement104
3233 Front Panel Unit Removal106
3234 Upper Case Removal107
324 Circuit Boards Removal108
3241 Bottom Panel Assembly Removal108
3242 Cooling Fan and C204 Power Supply Board Unit Removal111
3243 C204 SUB Board Unit Removal112
3244 C204 DRV-B and C204 DRV Board Units Removal113
3245 C204 MAIN Board Unit Removal114
3246 AC Inlet Removal116
3247 C204 PNL Board Removal117
325 Interlock Switch and Cover Open Sensor Assembly Removal118
325 Interlock Switch and Cover Open Sensor Assembly Removal118
326 Printer Mechanism Removal119
3261 Fan Removal121
3262 Ribbon Feed Change Lever Unit Removal122
3263 Tractor Select Lever (Upper and Lower) Assembly Disassembly124
3264 Ribbon Jam Sensor Removal125
3265 Connector Junction Board Assembly and FPC Board Assembly Removal126
3266 PG Sensor and PG Motor Removal127
3267 Plunger and Paper Bail Assembly Removal128
3268 Upper Paper Guide and Top PE Sensor Removal130
3269 Tension Roller Shaft Removal131
32610 Platen Removal133
32611 Paper Jam Sensor Removal134
32612 Pull Tractor Sensor Removal135
32613 Paper Width (PW) Sensor Removal136
32614 PG Home Sensor Removal137
32615 PF Motor Removal139
32616 Left Side Frame Gear Removal140
32617 Front Tractor Assembly Removal141
32618 Rear Tractor Assembly Removal142
32619 CR Motor Fan Removal143
32620 CR Motor Removal144
32621 CR (Carriage Encoder) Sensor Removal145
32622 Carriage Mechanism Disassembly146
32623 Paper Support Assembly Removal149
32624 32621 PF Drive Roller Removal150
CHAPTER 4151
41 PRINTER MECHANISM ADJUSTMENTS153
411 PG Motor Backlash Adjustment153
412 Carriage Timing Belt Tension Adjustment154
413 Tractor Wire Spring Tension Adjustment155
414 Pull Tractor Sensor Position Adjustment156
415 Carriage Guide Shaft Parallelism Adjustment157
416 Platen Angle Adjustment161
417 Platen Gap Motor Value Adjustment164
418 Measurement Seeking and Bi-directional Printing Adjustment167
CHAPTER 5173
51 TROUBLESHOOTING INFORMATION175
511 Error Messages175
512 Bypassing Interlock Switch and Cover Open Sensor176
513 Coil Resistance177
52 CIRCUIT BOARD REPAIR187
521 C204 PSB/PSE Board Repair187
522 C204 MAIN/DRV/DRV-B Boards Repair190
523 Printer Mechanism Repair197
CHAPTER 6201
61 PREVENTIVE MAINTENANCE203
62 LUBRICATION AND ADHESIVE APPLICATION203
APPENDIX209
A1 CONNECTOR PIN ASSIGNMENTS211
A2 CIRCUIT DIAGRAMS219
A3 Component Layout225
A4 Connectors on the Connector Junction Board231
A5 Part List232
A6 EXPLODED DIAGRAMS235

S.M 27/2/2025