Yamaha QL5 Manual page 76

QL5/QL1
Flow of hardware check at start-up
Shown below is the workflow for checking hardware such as MRAM, battery voltage, etc. when they are started
immediately after start-up of the unit.
The checksum in MRAM area is calculated.
176
Start-up
Character string stored in the specific
areas (at 2 locations) in MRAM is obtained.
Character string is in match
with the predefined one.
Above calculated
checksum is in match with the one
calculated at the power off.
Valid MacAddress
NG Fader not present.
Various flags are all false.
Normal start-up
Battery voltage > 2.5V
No
No
Memory initialization is executed.
MRAM NG flag = TRUE
No
MacAddress NG flag = TRUE
No
Fader NG flag = TRUE
No
Maintenance screen displayed
Various error pop-ups displayed
Exit button pressed
*2
No
LowBattery Popup displayed
*1
*3