Precautions - Mitsubishi Electric HP120TNU-A Service Handbook

[9-3 Software Rewrite Function on the USB ]
9-3-3

Precautions

For dealing with the displays shown on the maintenance LED and other problems, refer to Section [9-4 Maintenance LED
Display and Troubleshooting]
Take care to choose the correct countermeasure program for the intended model and version.
Store only one software rewrite program on the USB memory stick.
If this requirement is not met, software rewrite may not start.
Be cautious of electric shock when connecting an USB memory stick or a portable battery charger to the control board.
Connect the portable battery charger to the LEAD WIRE ASSY USB and then to the control board.
Make sure the portable battery charger is sufficiently charged. Rewrite error may occur if battery charge is insufficient.
Take care not to forget to remove the USB memory stick in step (3) - 2) or forget to turn off SW7-9 in step (3) - 3). [9-3-2
Rewriting Software] If these precautions are not taken, the system may not start normally.
When rewriting ended unsuccessfully, redo the procedure from step (1) - 3). [9-3-2 Rewriting Software]When rewriting ended
unsuccessfully, the system may be started in Software Rewrite Mode instead of using the switches on the control board.
Also refer to Section [9-4-2 Troubleshooting].
If software cannot be successfully rewritten using an USB memory stick, use a ROM writer to rewrite the software.
HWE18220_GB
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