Respironics DreamStation Service & Technical Reference Manual page 65

P 5-20
AGE
P /F
ROBLEM AILURE
The Display is Erratic
Back Light Does Not Work
Back Light Dims Too Quickly
Back Light Does Not Dim
Can't Change Humidity Settings
M P
ODE OSSIBLE
•
The device has been
dropped or mishandled
•
The device is in an area
with high Electromagnetic
Interference (EMI)
emissions.
•
Problem with UI ribbon
cables and connections.
•
Faulty PCA
•
Ambient light sensor is
blocked.
•
User perception
•
Ambient light sensor not
functioning
•
Ambient light sensor not
functioning
•
User perception - can
only change setting when
therapy is active. You
cannot change the
settings in the device
menus
•
Dial does not function
C
AUSE
•
Unplug the device and reapply
power.
•
Relocate the device to an area
with lower EMI emissions
(cellular phones, computers
TVs, etc.).
•
Check UI connections.
•
Replace UI Panel if faulty.
•
Replace PCA if ambient light
sensor is faulty.
•
Verify nothing is blocking the
ambient light sensor.
•
Verify ambient light sensor is
functioning by covering the
sensor hole on the Top
Enclosure.
•
Replace PCA if ambient light
sensor does not function.
•
Verify ambient light sensor is
functioning by covering the
sensor hole on the Top
Enclosure.
•
Replace PCA if ambient light
sensor does not function.
•
Activate therapy and verify the
settings change.
•
Verify the dial functions.
•
Replace any damaged UI
panel if dial does not function.
1117539, V
S T
TEPS TO AKE
. 07
ER