Service manual

2-12 Mechanism Configuration and Operating Principles Rev. B
Confidential
ribbon release spring. When the carriage sub assembly moves in the E direction, the ribbon
frame assembly and ribbon release lever return to their original positions because of the spring
power of the ribbon frame spring.
Electrical Circuitry Operating Principles
Hardware Configuration
Component connection diagram
The electrical circuitry of the printer consists of the main circuit board and the interface circuit
boards (UB-S01/RS-232, UB-P02/1284, or UB-S02/RS-485). The figure below is a component
connection diagram for the electrical circuitry.
Figure 2-15 Ribbon Switching
Figure 2-16 Component connection diagram
Ribbon switch lever
Ribbon switch lever hole
A
B
Detent face for ribbon switch
Push face for ribbon frame
C
E
D
Ribbon release lever
Ribbon release range Ribbon switch range
Ribbon switch section
Ribbon release section