The workflow of the Controller system failure diagnosis to be executed when only the
Control Panel bar is displayed.
1. Perform the following checks if the failure diagnosis does not start. If it starts, proceed
to the next step.
• Install the system software (Download by 2+8 startup)
• Replace the Main Controller PCB1
• Replace the HDD.
• Replace the Main Controller PCB2
2. When the detected location is displayed on the screen where "NG" is displayed,
identify the location of the failure by referencing the controller system failure diagnosis,
and perform the remedy. If the diagnosis does not proceed to a status where "NG" is
displayed, proceed to the next step.
3. If the failure diagnosis does not finish, perform the following work:
• Install the system software (Download by 2+8 startup)
• Replace the HDD.
• Replace the Main Controller PCB1
• Replace the Main Controller PCB2
Controller System Error Diagnosis Tool
• Main Controller PCB 1 side <Main Controller PCB 1, SDRAM, TPM PCB>
• Main Controller PCB 2 side <Main Controller PCB 2, SDRAM, Memory PCB>
• HDD>
The viewpoint of this Startup System Failure Diagnosis
The goal of the startup system failure diagnosis is to be able to solve troubles associated
with a Control Panel display failure by performing the following steps.
It is assumed that the users have already learned the following items:
• How to use a tester
• Roles of the All-night Power Supply (3.3V) and Non-all-night Power Supply (12V)
• How to back up data (HDD and Main Controller)
CAUTION:
AC power supply is always supplied to the AC Driver PCB. Pay attention not to cause
short circuit when accessing the PCB.
Useful Operations
The items of detailed procedure explanation start with a description of the flow diagram.
The items and procedures checked in the flow diagram are described separately in a check
item table. The flow diagram contains numbers (e.g. (1)) corresponding to the check items
so that the readers can grasp the relevant parts of the check item table.
Startup Failure Analysis Policy
Startup Failure Analysis Policy describes troubleshooting related to "Execution Flow for
Control Panel Startup Failure" for the All-night Power Supply (3.3V) and 12V Power Supply.
If the host machine does not start successfully even when its Power Switch is turned ON,
identify the location of the failure by referencing the following diagram.
Select the appropriate failure location identification procedure based on the display status
of the Control Panel.
Preconditions
If the following two parts are not operating with the main power turned ON, it is likely that a
failure has occurred.
• Control Panel Main Power LED (All-night Power Supply 3.3V system)
• Rotation noise of the motor at warm-up rotation and activation of the Control Panel
Backlight (12V system)
Memo:
• It may take about 5 minutes or more to display E XXX-XXXX.
Flow A: Execution Flow for Control Panel Startup
Failure
■■Status Check
If nothing is displayed on the Control Panel when the power of the host machine is turned
ON, identify the location of the failure according to the flow.
●●Flow for narrowing down troubles
If the Main Power LED is ON, the All-night Power Supply (3.3V) is being supplied.
If the 12V Power Supply is activated, the Control Panel Backlight can be activated.
If the power-on signal (3.3V) is supplied to the 12V Power Supply, the 12V can still activate
the Control Panel Backlight.
If the power-on signal is blocked, the 12V Power Supply stops supplying power.
Consult this flow when checking the 3.3V and 12V power supplies and identifying the
location of the failure in "Execution Flow for Control Panel Startup Failure" described below.
Control Panel 12V Check Flow
●●Control Panel 12V Check Flow
Disconnect J504 of
the Relay PCB and
check the following
resistance:
Relay PCB
FU502
Normal value: 0 ohm
Check the cables between J504 of the Relay PCB and J1002 of the Control Panel CPU PCB.
1. Disconnect the connectors of J504 and J1002.
2. Check if power is distributed between all pins of J504(pin 1 - pin 3) connector and all the
corresponding pins of J1002(pin 1 - pin 3) connector. Normal value: 0 ohm
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