natus neoBLUE, Service Manual

Page: 23 / 47

T
ABLE
3-1 T
ROUBLESHOOTING
G
UIDE
Symptom Probable cause Corrective Action Reference
Light does not
appear when
device is turned on
No power Verify that the AC outlet is functioning.
Power switch not in
correct position Ensure illuminated On/Standby switch is in
ON (|) position
Power cord not plugged
in all the way; or is
defective Check to make sure that power cord is
plugged in all the way to the device socket. If
the device will still not turn on try another
power cord.
Blown fuses
Check the power entry module to make sure
the fuses are intact. Figure 1-2 on
page 6
If none of the above restores the light, open the device and check for the
following:
Damaged cable Perform end-to-end continuity checks on the
cable going from the power supply to the LED
light current assembly, the cable going from
the LED light current assembly to the LED
light panel, and the cable going from the LED
light current assembly to the illuminated
On/standby switch. Figure 1-6 on
page 11
Damaged AC power
entry module Plug in. Verify that the voltage coming out of
the power inlet is between 90-132V or 210-
260V depending on the power system used in
your country.
Damaged power supply
Verify that the power supply is putting out
23.5-24.5V.
Damaged LED light
current assembly Follow steps in “Troubleshooting the LED light
current assembly.” Section 3.2 on
page 23
Illuminated
on/standby switch
doesn’t light up
Damaged casing
Perform continuity check on cable
LED switch failure Replace switch
Damaged LED light
current assembly Follow steps in “Troubleshooting the LED light
current assembly.” Section 3.2 on
page 23
Light intensity will
not adjust Damaged LED light
current assembly Follow steps in “Troubleshooting the LED light
current assembly.” Section 3.2 on
page 23
Maximum adjustment
reached Verify that that you have not reached the
maximum trim position of the intensity
adjustment potentiometer. Figure 2-3 on
page 19
If you still cannot achieve the desired
intensity, replace the LED light panel. Section 4.2 on
page 29
Light intensity will
not change
Broken switch
Open device and verify intensity switch
continuity using a DVM
neoBLUE
®
LED Phototherapy System Service Manual
21
PN 001320 Rev K