Yamaha MX-1, Product Handbook

Page: 103 / 116

II-51
Messages related to the PK-CTL Board: Protect Function
No. Message Condition Contents and countermeasures
06
LOUD PEDAL
TIME OUT !! The keyboard & sustain, soft/
shift pedal playback stop
→
Press STOP button to reset
The sustain pedal solenoid continually requires excessive
drive voltage to function.
→
Check sustain pedal acoustic
adjustment
07
SOFT PEDAL
TIME OUT !! Soft/shift pedal playback
stop
→
Turn power off then
back on to reset
The soft/shift pedal solenoid continually requires excessive
drive voltage to function.
→
Check soft/shift pedal acoustic
adjustment
08
SENSOR
LED ON ERROR! LCD display only. Recording
and Keyboard measurement
cannot be performed Data communication between emitter and receiver is not done
when LEDs are ON.
→
Check each connecter
09
SENSOR
NOT CONNECTED ! LCD display only. Recording
and Keyboard measurement
cannot be performed Data communication between emitter and receiver is not done
when LEDs are OFF.
→
Check each connecter
11
SOFT PEDAL
MUTE ERROR! LCD display only. The MX100II
Mute function does not work The acoustic adjustment of the soft pedal is not correct
→
Check pedal adjustment. Mute solenoid problem
→
Change
the solenoid
12
LOUD PEDAL OVER
LOAD! ERROR! The keyboard & sustain, soft/
shift pedal playback stop
→
Press STOP button to reset
Sustain pedal movement and operation is not within accepta-
ble range
→
Check the acoustic pedal adjustment and pedal
sensor board.
13
SOFT PEDAL OVER
LOAD! -> DISABLE! Soft/shift pedal playback
stop
→
Turn power off then
back on to reset
Soft/shift pedal movement and operation is not within accepta-
ble range.
→
Check the acoustic pedal adjustment and pedal
sensor board.
14
PIANO POWER OFF!
(THERMOSTAT) The keyboard & sustain, soft/
shift pedal playback stop. Play-
back functions cannot be
restored until the solenoid has
cooled down sufficiently. 100V of power to Keyboard and pedal drive OFF.
Either the sustain or soft/shift solenoid thermostat has acti-
vated because the solenoid become too hot.
→
Check pedal
acoustic adjustments or replace the broken thermostat.
15
PIANO POWER OFF!
(PWM OVER) The keyboard & sustain, soft/
shift pedal playback stop. Play-
back function cannot be
restored until the drive transis-
tor(s) has/have cooled down
sufficiently and the power has
been turned off, then turned
back on. 100V (120V for Grand) of power to Keyboard and pedal drive
OFF. One or more key drive transistors have become too hot
and the protect circuit has activated.
→
Check the drive board