Casio CTK-220L User Manuals

Table of Contents

• CTK-220L

  1
• CONTENTS

  2
• SPECIFICATIONS

  3
• BLOCK DIAGRAM

  4
• CIRCUIT DESCRIPTION

  5
  • KEY MATRIX

    5
  • LED MATRIX

    5
  • NOMENCLATURE OF KEYS

    5
  • CPU(LSI: MSM6755B-13)

    6
  • FILTER BLOCK

    7
  • POWER AMPLIFIER(IC301: LA4598)

    7
  • LED DRIVING

    7
• MAJOR WAVEFORMS

  8
• PRINTED CIRCUIT BOARDS

  9
• SCHEMATIC DIAGRAMS

  10
  • Main PCB JCM446-MA1M

    10
  • Sub PCBs KDM445-MA2M/MA3M

    11
  • Keyboard PCBs KDM4910K-KY1M/KY2M

    12
  • LED PCB KDM446-LD1M

    13
  • LED PCB KDM445-LD2M

    14
  • LED PCB KDM446-LD3M

    15
  • LED PCB KDM445-LD4M

    15
• EXPLODED VIEW

  16
• PARTS LIST

  17