NEC NC1600C Service Manual page 118

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