“Confidential, Do Not Duplicate without written authorization from NEC.”
4-23
TROUBLESHOOTING
LPSU Fail
Yes
No
Is there any problem in connections of the lamp
power supply (connectors, etc.)?
Adjust the faulty spots.
Yes
Yes
Is the AC power supply available?
Check for breakage and connector
disconnections in the sequential order
as specified below, and replace them
as required.
AC input terminal board
AC PWB
Circuit breaker
Noise filter
Check for breakage and connector disconnections
in the sequential order as specified below, and
replace them as required.
PEDE-A PWB
CPU PWB
Lamp power supply
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