Casio 120CR Manuals

Table of Contents

• 2

  Service Manual

  • • 2

      Table of Contents

  • 3

    1 Specifications

  • 4

    2 Initialize (Mac) Operation

  • 5

    3 Block Diagram

    • 5

      Pcb Connection
    • 6

      Block Diagram

  • 7

    4 Disassembly

  • 10

    5 Circuit Explanation

    • 10

      Power Supply Circuit
    • 11

      Reset Circuit
    • 12

      Data Communication Between CPU and EEPROM
    • 14

      Printer Drive Circuit
    • 14

      Pin Description (CPU Upd78043Fgf)

  • 16

    6 Diagnostic Operations

    • 16

      To Start the Diagnostic Operation
    • 16

      Check Items
    • 17

      Operations

  • 21

    7 Error Code List

    • 21

      Operation Error Code

  • 22

    8 IC Data

  • 23

    9 Pcb Layout

  • 24

    10 Circuit Diagram

• 31

  11. Parts List

  • 31

    11 Parts List
    • 34

      Button Block
    • 34

      Main PCB Block
    • 35

      Others
    • 35

      Power Supply Block
    • 35

      Printer Block
    • 35

      Upper Case Block
    • 36

      Button Block
    • 36

      Main PCB Block
    • 36

      Rear Display Block
    • 37

      Others
    • 37

      Power Supply Block
    • 37

      Printer Block
    • 37

      Upper Case Block
    • 38

      Drawer : DL-1838 (S Type)
    • 41

      DL-2768 (M Type)
    • 42

      Printer : M42V