Model N-STP Operation Manual
9.0. Troubleshooting
Although the unit is designed for years of trouble-free operations the Single Frequency laser
system has two basic failure mechanisms. No output beam is usually a failure of the N-STP-910
or N-STP-912 laser head, while inability to attain or maintain stable output is likely a fault in the
SFA, refer to Table 1-2 and Table 1-3.
Table 1-2. No Output Beam and related Symptoms and Causes
Symptom
Possible Cause
Action / Remedy
No power indication on
laser power supply
Electrical outlet is not live
or voltage does not match
line voltage setting, loose
or defective line cord,
defective indicator lamp,
defective or missing
interlock plug, defective
power switch or it is off,
blown main power fuse,
defective laser power
supply.
Check outlet, line cord, voltage
setting, interlock, power switch.
Else will need service.
No power indication on SFA
power supply.
Electrical outlet is not live,
loose or defective power
cord, defective SFA power
supply.
Check outlet, line, cord, and power
switch. Else will need service.
No laser output even after
15 seconds from power on,
not even a blue glow on
white card placed in front
of output aperture.
Shutter closed
Open Shutter
Laser power supply
defective.
Confirm laser power supply
condition using it to power a
similar laser.
Poor connection
Confirm that the high voltage
connector is inserted all the way
and fully seated.
Laser slow to start
If it does not light in 15 seconds,
power off, wait 10 seconds, and
power back on. If after doing this a
couple times it still does not start,
service will be required.
Only blue glow appears at
output
–
use white card to
confirm.
Laser mirrors are
misaligned or it is end-of-
life.
Service or replacement will be
required.
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