Toshiba HX-MU 901 Technical Information

Toshiba HX- MU 901 keyboard

Technical information

Version 1.1

By HansO, 2001
Checked and enhanced by Bas Kornalijnslijper

The information in this article is gathered by opening up a well-functioning
HX-MU901 musical keyboard and checking all connections. No guarantee is given
that this information is correct. You may use this information at your own risk.

1 Specification ..........................................................................................................2

2 Parts........................................................................................................................2

2.1 Key print ........................................................................................................2

2.2 Multi sensor print...........................................................................................2

2.3 Wiring............................................................................................................2

3 Circuit diagram of key print...................................................................................2

4 Block diagram of multi sensor print......................................................................4

5 Connections to multi sensor...................................................................................5

5.1 Circuit diagram of multi sensor.....................................................................5

6 Wiring....................................................................................................................6

6.1 Key-print15 pen connector out part to multi sensor print..............................6

6.2 Key print15 pen connector in line part to multi sensor print.........................6

6.3 External connector.........................................................................................7

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1 Specification

• Musical keyboard with 49 keys

• multi sensor

• can be used with Toshiba HX- MU900 MSX music module

• same connector as NMS1160 Philips keyboard but not compatible

2 Parts

The parts of the keyboard are:

2.1 Key print

A printed circuit underneath the keys with:

• 15 pen connector: 8 out lines, 7 in lines

• 49 switches underneath the keys

• 49 diodes

• a printed circuits that implements the matrix as shown in the circuit diagram

• 49 diodes

2.2 Multi sensor print

A printed circuit underneath the multi sensor with wires from keyboard print to
connection print at multi sensor

• Connector for in lines (7)

• Connector for out lines (8)

• Two connectors for outside wiring

• Connector for multi sensor (flexible wires)

2.3 Wiring

Wiring connects all prints and the external connector

3 Circuit diagram of key print

On the next page sthe circuit diagram is shown. Shown in landscape!

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