Yamaha LS9 Service Manual page 191

B. Hardware check flow at start-up
The flow for checking the hardware at start-up like SRAM check and battery voltage check just after starting the LS9 is shown below.
Check flow
Start-up
Battery voltage
> 0.5 V
Gains characters stored in the specified
area (2 regions) in the SRAM
Identical with the specified
characters
Calculates checksum
in the SRAM area
Identical with the checksum calculated
when turning off the power
Battery voltage
> 2.2 V
Effective
Mac Address
No NG fader
All the flags of any type
are FALSE
Normal start-up
Battery voltage
> 2.5 V
No
No
No
Executes memory initialization
MemoryError flag = TRUE
No
LowBattery flag = TRUE
No
MacAddress NG flag = TRUE
No
Fader NG flag = TRUE
No
Indication of initialization menu screen
*1
Various errors popup indication
Press the Exit button
*2
No
LowBattery! Popup indication
*3
*1
If there are a plurality of NG factors, an error popup is shown in the following order of
priority when the indication is changed to the initialization menu screen,
(All the factors are stored as log data, but there are no means to show the log.)
The error popup indicates only the top priority error. If there are a plurality of errors, fix them
one by one and restart until all the errors are fixed.
MacAddress NG > MemoryError flag > LowBattery flag
The following error popups are shown according to the contents of error:
Mac Address NG:
Memory Error:
Low Battery:
When the indication is changed to the initialization menu screen, the item "Initialize All
Memories" is usually selected. However, the item "Fader Calibration" will be automatically
selected when the indication is changed to the initialization menu screen in case of "Fader NG".
*2 The following is the battery condition indication in the Setup screen just after the start-up. The
indication depends on the detected voltage. The voltage is measured every 10 minutes.
0.5 V or less The battery is dead or is not installed
NO
2.2 V or less Inoperative battery backup ∗
LOW
2.5 V or less The battery should be replaced ∗
LOW
3.5 V or less Normal condition
OK
3.5 V or more Abnormal (This message must not appear.)
NG
∗ The same indication will appear in both cases. The only difference is the presence
or absence of popup at the start-up.
*3
The error popup "Low Battery!" will appear if the battery should be replaced after the normal
start-up as well. However, no popup will appear if the error popup "Low Battery!" is already
shown at the initialization menu screen to avoid overlap.
Notes:
1. The GUI does not show all the errors if there are a plurality of simultaneous errors, therefore,
they can be fixed only by repeating fixing procedures.
2. Under a situatoin where "Low Battery!" Popup is displayed, the battery voltage is 2.2 V or less
but the memory is not still damaged, if an error of power fan, internal or external power supply
is detected, the power supply related Error Popup may be given priority depending on timing.
LS9-16/LS9-32
"Illegal MAC Address! Cannot Use Ethernet."
"Memory Error! All Memories Initialized."
"Low Battery!"
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