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Set voltage margins
Note: This option can be only used for error analysis or factory test and must be used only
by trained service personnel. Restore nominal voltage values before restarting other
operations. Any data written on the disk in marginal mode must be removed before
restarting normal operations. Ignore any disk errors when using this option, and
retest the disk in nominal conditions.
Set or Reset Operator Panel LEDs
Enter 04 to set or reset the operator panel display. Select an option and enter its menu
command number.
Write on the Operator Panel Display
Enter 05 to write a given string on the operator panel Display. When requested, enter the
string you want to display.
Read Input Output Ports
Enter 06 to read a given I/O port. The selected I/O port contents are displayed as shown
below (the example contents are hexadecimal):
fe
Hit Return
Power-on or Power-off
Enter 08 to turn a unit's or device's power on or off. You can also turn the power of all units
on or off using a broadcast command. Select an option and enter its menu number. These
commands are used to test the power system. When you leave the I
the power of all devices will be turned off.
2-20
Service Guide
on/off LEDs
00 powoff Green
01 powon Green
02 powoff Yellow
03 powon Yellow
select(x:exit):
powering
00 broadcast ON
01 broadcast OFF
02 unit
ON
03 unit
OFF
04 device
ON
05 device
OFF
select(x:exit):
Status
off
off
2
C maintenance menu,
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