Citizen CLP-621 - Page 14

CHAPTER 2 OPERATING PRINCIPLES
TABLE OF CONTENTS
2-1.
Operation of Each Mechanism........................................................................................2-4
2-1-1. Locations and Functions of Motors, Sensors and Thermal Head.......................2-4
(1) Ribbon unit.................................................................................................2-4
(2) Printing section ..........................................................................................2-5
2-1-2. Media Feed Mechanism .....................................................................................2-6
2-1-3. Label/Tag Detection Mechanism ........................................................................2-7
2-1-4. Printing and Ribbon Feed Mechanism ...............................................................2-10
2-1-5. Print Head Up/Down Detection Mechanism .......................................................2-13
2-1-6. Head Balance Adjustment Mechanism...............................................................2-14
2-1-7. Media Offset Adjustment Mechanism .................................................................2-15
2-2. Operation of Control Parts ..............................................................................................2-16
2-2-1. Configuration of Printer ......................................................................................2-16
(1) Filter & power supply section.....................................................................2-16
(2) Main PCB...................................................................................................2-16
(3) Operation panel .........................................................................................2-16
(4) Thermal print head.....................................................................................2-17
(5) Sensors......................................................................................................2-17
(6) Motor..........................................................................................................2-17
(7) Parallel I/F (IEEE1284) ..............................................................................2-17
(8) Serial I/F (RS-232C) ..................................................................................2-17
(9) USB (Universal Serial Bus) I/F ..................................................................2-17
(10) Ethernet I/F (Option) ................................................................................2-17
(11) Wireless LAN I/F (Option) ........................................................................2-17
2-2-2. Operation of Control Unit....................................................................................2-18
(1) Block diagram ............................................................................................2-18
(2) Memory map..............................................................................................2-20
(3) Sensors......................................................................................................2-21
(3-1) Head up sensor ............................................................................2-21
(3-2) Transparent sensor and reflective sensor.....................................2-22
(3-3) Tension sensor F/R.......................................................................2-24
(3-4) Head temperature sensor .............................................................2-25
(3-5) PF motor temperature sensor.......................................................2-26
(3-6) Ribbon motor temperature sensor ................................................2-27
(4) Drivers .......................................................................................................2-28
(4-1) PF motor driver .............................................................................2-28
(4-2) Ribbon motor driver ......................................................................2-29
(4-4) Buzzer driver.................................................................................2-31
(4-5) Fan driver......................................................................................2-32
CLP-621 & CLP-631 2-2