Electrical Circuitry Operating Principles; Hardware Configuration - Casio UP-250 Technical Manual

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.
Ribbon release lever

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-P01/1284, or UB-S02/RS-485). The figure below is a component
connection diagram for the electrical circuitry.
Ribbon release range
D
Ribbon release section
Ribbon switch section
C
Push face for ribbon frame
Figure 2-15 Ribbon Switching
Figure 2-16 Component connection diagram
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Ribbon switch range
Ribbon switch lever
E
Ribbon switch lever hole
Detent face for ribbon switch
A
B