Yamaha disklavier DKC55 - Error History Display and Interpretation; Accessing Error History Log

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PK-CTL SHEET
**** TEST MODE ****
**** PK CTL SHEET ****
PK CTL ROM
V 1.00 00. 04. 01
PK-CTL ROM version number display
(1) PDL SNS TEST
PRESS [PLAY]
Realtime pedal sensing data display
(2) FOOT CTL TEST
PRESS [PLAY]
Foot controller test
(3) PK ROM TEST
PRESS [PLAY]
PK CTL ROM test
(4) PK RAM TEST
PRESS [PLAY]
PK RAM test
(5) PK EEP TEST
PRESS [PLAY]
PK EEP ROM test
Clear EEP ROM?
yes -> R no -> L
Clearing the EEP ROM is normally only necessary following the replacement of
a PK-CTL board
Select button X4