Error Display LEDs on the I/O Board
As shown in the figure below, the I/O board is mounted with LEDs that indicate abnormal operation
in the driving system. If an error occurs, the pertinent LED lights up next, after the solenoid power supply
is turned OFF, the other LEDs also gradually light up.
LED1
LED2
LED3
LED4
LED5
LED6
LED7
Error C i r c u i t
Key Solenoid Unit-Keys 25-48:
Short-circuited diode or overcurrent to the d r i v e transistor.
Key Solenoid Unit-Keys 1-24:
Short-circuited diode or overcurrent to the d r i v e transistor.
Key Solenoid Unit-Keys 49-72:
Short-circuited diode or overcurrent to the d r i v e transistor.
Key Solenoid Unit-Keys 73-88:
Short-circuited diode or overcurrent to the d r i v e transistor.
Soft Pedal:
Short-circuited diode or overcurrent to the d r i v e transistor.
Damper Pedal:
Short-circuited diode or overcurrent to the d r i v e transistor.
A c t i v a t i o n of the thermostat w i t h i n the Key Solenoid Unit
* Please note that the same display occurs if the 1 -M
Ω
resistance for 100VDC voltage division is OPEN,
or if the soldering between the error display comparator and the 10
µ
F/16V tantalic capacitor is
faulty.
* When the error display circuit is activated, the 100V power supply for driving the solenoids is
automatically switched OFF.
31
Содержание disklavier MX-100A
Страница 1: ...MX 100A ...
Страница 19: ...Block Diagram 16 ...
Страница 39: ...36 ...
Страница 41: ...Program Flow chart Memory Map of Disklavier 38 ...
Страница 46: ...3 LIST OF PMAC TERMINALS 43 ...
Страница 47: ...44 ...
Страница 49: ...LIST OF MB8877 TERMINALS 46 ...
Страница 50: ...YM3802 MCS MIDI Communication Service Controller LIST OF YM3802 TERMINAL YM3802 Pin assignment 47 ...
Страница 56: ...3 7 Timing Chart of CLK and DATA 53 ...
Страница 60: ...CPU Circuit Board 57 58 ...
Страница 61: ...I O Circuit Board 59 60 ...
Страница 70: ...2 Control Unit 8 Part No EV303046 EI330056 EA026056 VE514700 MZ501260 VE479800 ...
Страница 76: ...8 I O Unit Power Supply Unit MIDI Unit 16 ...
Страница 78: ...SM8549 ...
Страница 79: ......
Страница 80: ......