Service manual
Table Of Contents
- Revision Table
- Introduction
- Chapter 1
- Features and General Specifications
- Chapter 2
- Mechanism Configuration and Operating Principles
- Printer Mechanism Operating Principles
- Print mechanism unit
- Print head unit movement
- Wire movement when a single dot is printed
- Printing a character (9x9 font)
- Paper Feed Mechanism Unit
- Paper loading (semi-automatic loading)
- Paper feeding
- Ribbon Feed Mechanism Unit
- Ribbon feeding
- Detection Mechanism Unit
- Home position detection mechanism
- Paper detection mechanism
- Paper roll near-end detection mechanism (optional)
- Auto-cutter mechanism
- Ribbon Switch Mechanism Unit
- Electrical Circuitry Operating Principles
- Principles of Operation
- Printer Mechanism Driver Circuits
- Printer Mechanism Operating Principles
- Chapter 3
- Handling and Maintenance
- Chapter 4
- Troubleshooting
- Chapter 5
- Disassembly, Assembly, and Adjustment
- Small Part Specifications
- Disassembly
- Sub-assembly A
- Main Assembly 1
- Main Assembly 2
- Main Assembly 3
- Main Assembly 4
- Main Assembly 5
- Main Assembly 6
- Main Assembly 7
- Main Assembly 8
- Main Assembly 9
- Main Assembly 10
- Main Assembly 11
- Main Assembly 12
- Main Assembly 13
- Main assembly 14
- Main Assembly 15
- Main Assembly 16
- Main Assembly 17
- Main Assembly 1 (Case Unit)
- Main Assembly 2 (Case Unit)
- Main Assembly 3 (Case Unit)
- Main Assembly 4 (Case Unit)
- Main Assembly 5 (Case Unit)
- Main Assembly 6 (Case Unit)
- Main Assembly 7 (Case Unit)
- Main Assembly 8 (Case Unit)
- Main Assembly 9 (Case Unit)
- Main Assembly 10 (Case Unit)
- Main Assembly 11 (Case Unit)
- Main Assembly 12 (Case Unit)
- Adjustment
- Appendix
- Appendix
- Addendum 1
- Main Circuit Board Types and Maintenance
- Addendum 2
- Lower Plate Change and ROM Spacer Abolition
- Addendum 3
- Auto-Cutter Release Tab Change

3-14 Handling and Maintenance Rev. B
Confidential
Cleaning
1. Wipe off stains with a clean, dry cloth. If the stains cannot be wiped off, use a neutral
detergent.
CAUTION:
Never use benzene, alcohol, thinner, trichloroethylene, or any of the ketone family of
solvents because they may deform or damage plastic and rubber components.
2. Thoroughly clean all parts of the printer with a vacuum cleaner.
Note:
Check the amount of lubrication in each cleaned area and lubricate as needed. See “Lubricants”
below.
Lubricants
Lubrication is critical to retaining the printer at its initial performance level throughout its
product life, as well as avoiding potential problems. Always lubricate at prescribed intervals,
using the correct lubricants.
Standard Lubrication
❏
During disassembly and reassembly, clean the parts first, then lubricate them. See the
lubrication points table in this chapter and the lubrication and adhesive points diagrams in
the Appendix.
❏
Lubricate or overhaul after every 7.5 million lines printed.
Lubricants
The types of lubricants used greatly affect the printer’s performance and durability, and a
lubricant’s low-temperature characteristics require special attention. EPSON has conducted
thorough analyses of the technical data and wide-ranging experimentation on different
lubricants. The EPSON selection of lubricants prescribed for use with the printer is based on the
results of such research. The prescribed EPSON lubricants are available in 40 cc (40 gr) metal
cans or plastic containers (the smallest unit of supply).
The two types of lubricants used with this printer are G-31 and O-10.