Media Feed Mechanism - Citizen CL-S400DT Technical Manual

Part name
SA Power Supply
SA LCD PCB

2-1-2. Media Feed Mechanism

The major components of the media feed mechanism are:
(a) Unit, Motor
(b) SA2 Platen
(c) Gear Train (Gear Reduction 1, Gear Reduction 2, Gear Idle)
By closing the cover, media is pushed against the "SA2 Platen".
As the "Unit, Motor" (stepping motor) turns counterclockwise viewing from the right side of the
printer, the "SA2 Platen" turns counterclockwise via the gear train ("Gear Reduction 1", Gear
Reduction 2" and "Gear Idle") and media is fed forward by the friction force produced between the
"SA2 Platen" and the "SA2 Head".
When the "Unit, Motor" turns clockwise, media is fed backwards.
One step of the "Unit, Motor" feeds media by 1/16 mm (0.0025").
Thermal elements
SA2 Platen
Gear Idle
Gear Reduction 2
Gear Reduction 1
Converts AC to DC24 V and feeds it to the "SA Main PCB".
Consists of LCD, LED and switches for operation.
SA2 Head
5
4
3 1
Description
Media
Unit, Motor
2
2-5
Chapter 2 Operating Principles
2-1. Operation of Each Mechanism
CL-S400DT