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
2-28 Mechanism Configuration and Operating Principles Rev. B
Confidential
Auto-cutter driver circuit
Rotating the DC motor counterclockwise or clockwise causes the auto-cutter to execute a full cut
or a partial cut (one point left uncut). The driver IC (U6) has a full-bridge configuration and
controls motor rotation, clockwise and counterclockwise.
The position of the auto-cutter blade is detected by the signal connected to P67 of the CPU.
Figure 2-29 Auto-cutter drive circuit
1
2
3
CN9
4
AC M1
AC M2
GND
AC RES
Auto-cutter
12
C21
+5V
R35
R34
IN1
IN2
U6
+24V
R57
R58
VM
OUTA
OUTA
GND
P100
P101
3
4
1
2
TA8428K
7
3
5
4 GND
1
2
3
4
GND
P67
C20
BLOCK (1)
U5