“Confidential, Do Not Duplicate without written authorization from NEC.”
4-31
TROUBLESHOOTING
Tamper-Switch Activation Detected
Yes
No
Are external screws tightened? Adjust the problem points.
Adjust the problem points.
Adjust the problem points.
Yes
No
Is there any abnormality in the lid of the TI Chest?
Yes
No
Is there any abnormality between the PJKEY PWB
and the TAMPER PWB, such as drawing out of the
connector?
Look for any damage or the drawing out of the
connector and follow the steps of replacement
work in the order specified below.
TAMPER PWB
PJDIV PWB
CPU PWB
INTERFACE Board
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