CONTENTS
The Disklavier Design 1
Specifications 1
Names and Functions
• Front Panel 2
• Remorte Control Unit 5
• Connectors 6
How to Format Disks 7
MIDI Data Format 8
MIDI Implementation Chart 11
MIDI Troubleshooting and know-how 12
Warning Displays and error messages 14
Error number meaning 15
Block Diagram 16
Disassembly Procedure 17
Adjustment Procedure
• Key Drive Unit 21
• Key Stop Rail Unit 21
• Pedal Drive Unit 22
• Pedal Cushion Unit 23
• Sensor Units 24
Operation Test of Each Unit Using The Test Disk 26
Error Display LEDs on the I/O Board 31
Adjusting the Trimmer 32
Test Program 33
Program Flow-chart and Memory Map of Disklavier 38
Explanation of Sensor System 39
LSI Data Table 41
CPU Circuit Board 57
I/O Circuit Board 59
Sensor, Hammer, Key, M1, K, M2 Circuit Board 61
Drive Unit, MIDI, Power Supply Circuit Board 63
Part List
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