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All in One Printer
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DFX-8500
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MAINTENANCE
Rev. B
6-
5
Figure 6-4. Lubrication and Adhesive Diagram 3
Contents
Main
NOTICE
Copyright 1998 by SEIKO EPSON CORPORATION Nagano, Japan
PRECAUTIONS
WARNING
CAUTION
WARNING
CAUTION
PREFACE
Page
Page
CHAPTER 1 GENERAL DESCRIPTION
Page
1.1 FEATURES
1-2
1.2 SPECIFICATIONS
1.2.1 Printing Specification
0.35 mm (1/72") 2.82 mm (8/72") 1.69 mm (1/15")
1-4
Note: These tables can not be selected by DIP switch.
Page
1-6
1.2.2 Paper Feeding
Note : The feeding speed will be reduced to 0.152 mps (6.0 ips) when the pull tractor is mounted.
1.2.3 Electrical Specification
1.2.4 Environmental Condition
*1: Without condensation *2: With shipment container
1.2.6 Safety Approvals
1.2.7 CE Marking
1.2.8 Acoustic Noise
1.2.9 Ribbon Cartridge
1.2.10 Physical Specifications
1.2.11 Printable area
Page
Page
Page
1-12
1.2.12 Paper and Media
1.2.12.1 Continuous paper (Single sheet and multi-part)
Page
1-14
1.2.12.2 Labels
W H
1.2.12.3 Continuous Forms with Labels
1-16
1.2.12.4 Overlapping Multi-part Form
1.2.12.5 Perforation
1.2.12.6 Notes
Figure 1-12. Paper Width Overlapping Area
Figure 1-13. Perforations 1 Figure 1-14. Perforations 2
Page
1.3 INTERFACES
1.3.1 Parallel Interface (Forward channel)
1-20
Note: * In/Out refers to the direction of signal flow from the printers point of view.
1.3.2 Parallel Interface (Reverse channel)
Note: * In/Out refers to the direction of signal flow from the printers point of view.
1.3.3 Serial Interface
1.3.4 Optional Interface
1.3.5 Interface Selection
1.3.6 Prevention Hosts from Data Transfer Time-out
1-24
1.4 OPERATING INSTRUCTIONS
Figure 1-22. Control Panel
1.4.1 Control Panel
LED Off LED On
1.4.1.1 Switches
1-26
1.4.1.2 Indicators
1.4.2 Errors and Buzzers
Note 1: The descriptions .and - show how the beeper sounds.
1-28
1.4.3 DIP Switch Settings
Page
1-30
1.4.4 Functions
1.4.4.1 Usual operation
1-32
1.4.4.2 Operation at Power On
1-34
1.4.4.3 Built-in Detection
1.4.5 Paper Memory Function
1-36
1.4.6 Initializations
1.4.6.1 Power-on Initialization
1.4.6.2 Software Initialization
1.4.6.3 Panel Initialization
1.5 MAIN COMPONENT
1.5.1 M-3I60 Printer Mechanism
1.5.2 Main Control Board (C204 MAIN Board)
1.5.3 C204 DRV Board
Page
Page
Page
Page
CHAPTER 2 OPERATING PRINCIPLES
Page
2.1 PRINTER MECHANISM OPERATION
Page
Page
2.1.1 Printhead Mechanism
2.1.2 Carriage Mechanism
2-
2.1.3 Platen Gap Adjustment Mechanism
2.1.4 Paper Feed Mechanism
Page
2.1.4.1 Tractor Wire Operation
Page
Rev. B 2-11
2.1.6 Plunger Mechanism
2.2 POWER SUPPLY OPERATION
2.2.1 Power Supply Overview
Figure 2-14 shows a block diagram of the C204 PSB/PSE board.
Figure 2-14. Power Supply Board Block Diagram
CN3
CN4 CN2 CN5
Page
Page
2.3 CONTROL CIRCUIT
2.3.1 Control Circuit Operation Overview
Figure 2-15. Control Circuit Block Diagram
Page
Page
2.3.2 Reset Circuit
2.3.3 Sensor Circuits
Figure 2-18. Sensor Circuit Block Diagram
POFF (SD)
CN10
CN1
Page
Page
2.3.4 CR Motor Drive Circuit
Page
Acceleration Cu rve
Note: 1, 2, and 3 indicate the PWM control section number.
2.3.5 PF Motor Drive Circuit
2.3.6 RF Motor Drive Circuit
TMP95C061A (IC2)
E05B36 (IC1)
Rev. B 2-31
2.3.7 PG Motor Drive Circuit
2.3.8 Plunger Drive Circuit
PLN
Plunger Coil
Rev. B 2-3
2.3.9 Printhead Drive Circuit
Printhead Coils 1/2
Printhead Thermistor
Printhead Coils 2/2
MAIN Board
2-3
CHAPTER 3 DISASSEMBLY AND ASSEMBLY
Page
3.1 OVERVIEW
3.1.1 Precautions for Disassembly and Assembly
Page
3.1.2 Tools
Page
3.1.3 Specification for Screws
3.1.4 Service Checks After Repair
3.2 DISASSEMBLY AND ASSEMBLY
3.2.1 ROM Replacement
3.2.2 Printhead and Ribbon Mask Assembly Removal
Page
3-11
Page
3.2.3 Housing Removal
3.2.3.1 Top Cover Removal
3.2.3.2 Left, Right, and Front Covers Removal and Fuse Replacement
Make sure the new fuse meets the printer's AC power specifications.
3.2.3.3 Front Panel Unit Removal
3.2.3.4 Upper Case Removal
3.2.4 Circuit Boards Removal
3.2.4.1 Bottom Panel Assembly Removal
CB(M3X12)
CBB(M 3X12)
Rear Cover
Optional In te rfa c e C o v e r In te rfa c e C o v e r
Page
3-21
3.2.4.2 Cooling Fan and C204 Power Supply Board Unit Removal
3.2.4.3 C204 SUB Board Unit Removal
3.2.4.4 C204 DRV-B and C204 DRV Board Units Removal
3.2.4.5 C204 MAIN Board Unit Removal
Page
3.2.4.6 AC Inlet Removal
3.2.4.7 C204 PNL Board Removal
3.2.5 Interlock Switch and Cover Open Sensor Assembly Removal
In te rlo ck S W Assembly
Upper Case
CBB(M4X10) Lower Case
CBB(M3X10) Cover Open Sensor
3.2.6 Printer Mechanism Removal
Two people are required to remove or install the printer mechanism.
Earth Cable CBS(O) Screw(M4x8) C204 PSB/PSE Board (R ig h t s id e )
Bottom P anel Assembly
Page
3-31
3.2.6.1 Fan Removal
3.2.6.2 Ribbon Feed Change Lever Unit Removal
Page
3.2.6.3 Tractor Select Lever (Upper and Lower) Assembly Disassembly
Attach the tractor select levers to the tractor select cam as shown in Figure 3-50.
3.2.6.4 Ribbon Jam Sensor Removal
3.2.6.5 Connector Junction Board Assembly and FPC Board Assembly Removal
3.2.6.6 PG Sensor and PG Motor Removal
3.2.6.7 Plunger and Paper Bail Assembly Removal
Page
3.2.6.8 Upper Paper Guide and Top PE Sensor Removal
3-41
3.2.6.9 Tension Roller Shaft Removal
Page
3.2.6.10 Platen Removal
3.2.6.11 Paper Jam Sensor Removal
When you attach the paper jam sensor, make sure it is oriented correctly (front to back).
3.2.6.12 Pull Tractor Sensor Removal
3.2.6.13 Paper Width (PW) Sensor Removal
3.2.6.14 PG Home Sensor Removal
Page
3.2.6.15 PF Motor Removal
3.2.6.16 Left Side Frame Gear Removal
3-51
3.2.6.17 Front Tractor Assembly Removal
<Left> <Right>
3.2.6.18 Rear Tractor Assembly Removal
3.2.6.19 CR Motor Fan Removal
3.2.6.20 CR Motor Removal
3.2.6.21 CR (Carriage Encoder) Sensor Removal
3.2.6.22 Carriage Mechanism Disassembly
Side Fram e (L) Belt Pulley Belt Pulley Holder
Flange N ut
Front Carriage G uide Shaft
Page
Page
3.2.6.23 Paper Support Assembly Removal
3-6
3.2.6.24 3.2.6.21 PF Drive Roller Removal
Page
Page
4.1 PRINTER MECHANISM ADJUSTMENTS
4.1.1 PG Motor Backlash Adjustment
4.1.2 Carriage Timing Belt Tension Adjustment
7000 gf + 200 gf
CPS(M4X10)
Rev. B 4-
4.1.3 Tractor Wire Spring Tension Adjustment
4.1.4 Pull Tractor Sensor Position Adjustment
4.1.5 Carriage Guide Shaft Parallelism Adjustment
Page
Rev. B 4-
CP(PS)M3X6) Tim ing Belt Holder
Carriage
Carriage G uide Shaft (Rear)
A B
Page
4.1.6 Platen Angle Adjustment
Hexagonal Screws (M 4X8)
Platen Stay (R )
Platen Stay (L) Positioning Tab Positioning Tab
Side Frame R SideSide Frame L S ide
Platen
Center Position 70 mm 70 mm
Page
4.1.7 Platen Gap Motor Value Adjustment
A L P H A V a l u e P r i n t
P r in t h e a d
Page
Page
4.1.8 Measurement Seeking and Bi-directional Printing Adjustment
Page
START
G o to B i-D . A d ju s t m e n t M o d e .
Figure 4-21. Flight Time Adjustment
END
40 CO L. 40 CO L.56 CO L.
Flight Time + XX X
B i-D . A d ju s t m en t M o de
Figure 4-23. Bi-d. Adjustment
*1)
No
Return
Page
Page
Page
5.1 TROUBLESHOOTING INFORMATION
5.1.1 Error Messages
5.1.2 Bypassing Interlock Switch and Cover Open Sensor
Short Circuit Connector
Rev. B 5-
5.1.3 Coil Resistance
Head FPC
C B A
FPC A
FPC B FPC C
Rev. B 5-
1. The printer does not operate when power is turned on.
5-
2. Carriage operation is abnormal.
A
5-
A
B
Check the print head coil resistance.
Replace the C204 MAIN and./or
B
4. Printing is normal, but paper feeding is abnormal.
No No
Page
6. Data sent by the host computer is printed incorrectly.
Note : The flowchart below assumes the host computer is operating normally.
5.2 CIRCUIT BOARD REPAIR
5.2.1 C204 PSB/PSE Board Repair
Page
Page
5.2.2 C204 MAIN/DRV/DRV-B Boards Repair
Page
Page
Page
Page
Rev. B 5-21
Page
Rev. B 5-2
5.2.3 Printer Mechanism Repair
Adjustments
Page
Rev. B 5-2
Adjustments
Page
Page
Page
6.1 PREVENTIVE MAINTENANCE
6.2 LUBRICATION AND ADHESIVE APPLICATION
6-
Page
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Rev. B A-1
A.1 CONNECTOR PIN ASSIGNMENTS
Figure A-1. Cable Connection
Page
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Page
A.2 CIRCUIT DIAGRAMS
Page
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Rev. B A-2
A.4 Connectors on the Connector Junction Board
Figure A- 15. Connectors on the Connector Junction Board
See the figure bellow for the connector arrangement on the connector junction board.
A-2
A.5 Part List
Rev. B A-2
A-3
Rev. B A-31
A.6 EXPLODED DIAGRAMS
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EPSON OVERSEAS MARKETING LOCATIONS
As of September, 1996