User Guide

NHM-4
CCS Technical Documentation
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Display troubleshooting 2
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Display
faults 2
Are the display
led’s turned on ?
Measure
DC voltage from
V324, V325 anode
Is it 4.1 V ?
Check LED‘s
and line
Check line to UEM
(DLIGHT must be in
Lines to LEDs broken
No
Yes
No
No
Display
faults 3
Yes
Measure
DC voltage from
R310
Is it ~0V ?
Change LA4 module
LOW state when
lights are ON and
in high impedance
state when lights are
OFF)
IF OK –>
change UEM
Yes