Chapter 3 Disassembly And Assembly - Epson DFX-8500 Service Manual

CHAPTER 3
DISASSEMBLY AND ASSEMBLY
3.1 OVERVIEW _________________________________________________________________ 3-1
3.1.1 Precautions ______________________________________________________________________ 3-1
3.1.2 Tools ___________________________________________________________________________ 3-3
3.1.3 Screw Specifications _______________________________________________________________ 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 Removal____________________________________________________________ 3-16
3.2.3.4 Upper Case Removal____________________________________________________________ 3-17
3.2.4 Circuit Board Removal ____________________________________________________________ 3-18
3.2.4.1 Bottom Panel Removal __________________________________________________________ 3-18
3.2.4.2 Fan and C204 Power Supply Board Removal_________________________________________ 3-21
3.2.4.3 C204 SUB Board Removal _______________________________________________________ 3-22
3.2.4.4 C204 DRV-B and C204 DRV Board Removal ________________________________________ 3-23
3.2.4.5 C204 Main Board 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 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 Disassembly__________________________________________________ 3-34
3.2.6.4 Ribbon Jam Sensor Removal______________________________________________________ 3-35
3.2.6.5 Connector Junction Board and FPC Board Removal ___________________________________ 3-36
3.2.6.6 Platen Gap (PG) Sensor and PG Motor Removal ______________________________________ 3-37
3.2.6.7 Plunger and Paper Bail 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 Sensor Removal ___________________________________________________ 3-46
3.2.6.14 Platen Gap Home Sensor Removal _______________________________________________ 3-47
3.2.6.15 Paper Feed Motor Removal_____________________________________________________ 3-49
3.2.6.16 Left Gear Train Removal ______________________________________________________ 3-50
3.2.6.17 Front Tractor Removal ________________________________________________________ 3-51
3.2.6.18 Rear Tractor Removal _________________________________________________________ 3-52
3.2.6.19 Carriage Motor Fan Removal ___________________________________________________ 3-53
3.2.6.20 Carriage Motor Removal_______________________________________________________ 3-54
3.2.6.21 Carriage Encoder Sensor Removal _______________________________________________ 3-55
3.2.6.22 Carriage Mechanism Disassembly _______________________________________________ 3-56
3.2.6.23 Paper Guide Support Plate Removal ______________________________________________ 3-59
3.2.6.24 Platen Roller Removal_________________________________________________________ 3-59