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Casio RZ-1 Service Manual

Casio RZ-1
25 pages
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Casio RZ-1 Specifications

General IconGeneral
TypeDrum Machine
Polyphony8 voices
Number of Instruments12
Sampling Resolution8-bit
SequencerYes
Patterns100
Songs10
MIDIYes
Power SupplyAC adapter
Year Released1986
Weight2.2 kg
Sound EngineSampled PCM

Summary

Major Waveforms

CPU Functions and System Access

CPU (µPD7811G-120) Pin Functions

Detailed pin functions and I/O for the main CPU.

System Program ROM & Data RAM Accesses

Describes how the CPU accesses program ROM and data RAM.

Chip Selector Logic

Chip Selector Circuit

Explains the function of the TC74HC139 chip selector.

Percussion Generator Details

Percussion Generator (µPD934G) Pin Functions

Pinout and functions for the percussion generator LSI.

Percussion Generator Circuitry

Block diagrams for the µPD934G (B and C) chips.

Sub PCB Circuit

Sampling Circuit Operations

Multiplexer and Switch Matrix Circuits

Multiplexer Circuit

How percussion sounds are time-shared and output.

Switch Matrix Circuit

Logic for mapping switch inputs to functions.

Reset and Interface Circuits

Reset Circuit

Circuitry for initializing the percussion generator.

MIDI & MT Interface Circuits

Connectivity standards for MIDI and cassette tape.

Operational Features and Sound Adjustment

Metronome Circuit

Circuit generating metronome sounds.

Mute Circuit at Power On

Prevents noise during power-up.

Metronome Sound Adjustment

Procedure for adjusting metronome timing.

Troubleshooting Guide

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