Epson DFX-8500 Circuit Boards Removal, Interlock Switch and Cover Open Sensor Assembly Removal

CHAPTER 3

DISASSEMBLY AND ASSEMBLY

3.1 OVERVIEW	3-1
3.1.1 Precautions for Disassembly and Assembly	3-1
3.1.2 Tools	3-3
3.1.3 Specification for Screws	3-5
3.1.4 Service Checks After Repair	3-6

3.2 DISASSEMBLY AND ASSEMBLY	3-7
3.2.1 ROM Replacement	3-8
3.2.2 Printhead and Ribbon Mask Assembly Removal	3-9
3.2.3 Housing Removal	3-13
3.2.3.1 Top Cover Removal	3-13
3.2.3.2 Left, Right, and Front Covers Removal and Fuse Replacement	3-14
3.2.3.3 Front Panel Unit Removal	3-16
3.2.3.4 Upper Case Removal	3-17
3.2.4 Circuit Boards Removal	3-18
3.2.4.1 Bottom Panel Assembly Removal	3-18
3.2.4.2 Cooling Fan and C204 Power Supply Board Unit Removal	3-21
3.2.4.3 C204 SUB Board Unit Removal	3-22
3.2.4.4 C204 DRV-B and C204 DRV Board Units Removal	3-23
3.2.4.5 C204 MAIN Board Unit Removal	3-24
3.2.4.6 AC Inlet Removal	3-26
3.2.4.7 C204 PNL Board Removal	3-27
3.2.5 Interlock Switch and Cover Open Sensor Assembly Removal	3-28
3.2.6 Printer Mechanism Removal	3-29
3.2.6.1 Fan Removal	3-31
3.2.6.2 Ribbon Feed Change Lever Unit Removal	3-32
3.2.6.3 Tractor Select Lever (Upper and Lower) Assembly Disassembly	3-34
3.2.6.4 Ribbon Jam Sensor Removal	3-35
3.2.6.5 Connector Junction Board Assembly and FPC Board Assembly Removal	3-36
3.2.6.6 PG Sensor and PG Motor Removal	3-37
3.2.6.7 Plunger and Paper Bail Assembly Removal	3-38
3.2.6.8 Upper Paper Guide and Top PE Sensor Removal	3-40
3.2.6.9 Tension Roller Shaft Removal	3-41
3.2.6.10 Platen Removal	3-43
3.2.6.11 Paper Jam Sensor Removal	3-44
3.2.6.12 Pull Tractor Sensor Removal	3-45
3.2.6.13 Paper Width (PW) Sensor Removal	3-46
3.2.6.14 PG Home Sensor Removal	3-47
3.2.6.15 PF Motor Removal	3-49
3.2.6.16 Left Side Frame Gear Removal	3-50
3.2.6.17 Front Tractor Assembly Removal	3-51
3.2.6.18 Rear Tractor Assembly Removal	3-52
3.2.6.19 CR Motor Fan Removal	3-53
3.2.6.20 CR Motor Removal	3-54
3.2.6.21 CR (Carriage Encoder) Sensor Removal	3-55
3.2.6.22 Carriage Mechanism Disassembly	3-56
3.2.6.23 Paper Support Assembly Removal	3-59
3.2.6.24 PF Drive Roller Removal	3-60