Casio GZ-5 Service Manual

Also see for GZ-5: Operation manual

Contents

— 9 —CIRCUIT DESCRIPTIONKey MatrixKI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7KO0 F3 F#3 G3 G#3 A3 A#3 B3 C4KO1 C#4 D4 D#4 E4 F4 F#4 G4 G#4KO2 A4 A#4 B4 C5 C#5 D5 D#5 E5KO3 F5 F#5 G5 G#5 A5 A#5 B5 C6KO4 Pad 0 Pad 1 Pad 2 Pad 3 Pad 4KO5 Enter Pad 5 Pad 6 Pad 7 Pad 8 Pad 9KO6 VolumeUpVolumeDownBendSense MIDI CH. ControlKO7 PitchBend -PitchBend +KO8 Modula-tionKO9 VelocityffVelocityfVelocitymfVelocitympVelocitypVelocityppKO10 Internal MIDI Out OctaveShift C6OctaveShift C5OctaveShift C4OctaveShift C3OctaveShift C2OctaveShift C1Pin No. Terminal In/ Out Function1, 2 TEST1, TEST2 Not used. Connected to ground.3 RESET In Power ON reset input. On: +6V Off: 0V4 AVDD In +5 V sorce for the built-in DAC5 OUT Out Sound waveform output6 AGND In Ground (0 V) source for the built-in DAC7 GND In Ground (0 V) source8 COSI In 21.725 MHz clock pulse input9 COSO Not used.10 VDD In +5 V source11 ~ 18 KI0 ~ KI7 In Input terminal from keys and switches19 KO11 Out MIDI signal output20 ~ 30 KO10 ~ KO0 Out Key and switch scan signal outputCPU (LSI101: MSM6387-A23)Containing a MIDI controller, the CPU outputs MIDI messages in accordance with the pressed keys andbuttons.The following table shows the pin functions of LSI101.