Switches/Thermostat - GE Giraffe OmniBed Service Manual

Chapter 4: Troubleshooting
Signal
+5V
+5VSTBY
+12V
The 5VSTBY should also be present during power fail.
+5VAN and -5VAN are generated on the control board and are only used on the control board. They can be
measured on the test points on the control board.
Signal
+5V
+5VSTBY
+5AN
-5AN

4.6.5 Switches/Thermostat

Use switch status diagram on the second service screen to assist in troubleshooting the switches.
Canopy up detect
Canopy down detect
Canopy middle
Heater doors open
Heater doors closed
Humidity reservoir
Add water thermostat
Canopy foot control
Left or Right
E-base foot control
Left or right up
Left or right down
The following switches are membrane switches. When closed the resistance should be less than 200 ohms.
Display touch panel switches
Alarm Silence
>37 degrees
Servo Control
Up
Down
Manual Mode Rad. Htr
60
Location
J42 pins 1-2
J42 pins 1-4
J42 pins 1-3
Location
TP2 pins 1-4
TP2 pins 3-4
TP1 pins 5-6
TP1 pins 4-6
Relay bd J36 pins 1-2
Relay bd J36 pins 7-8
Relay bd J36 pins 4-5
Relay bd J31 pins 2-3
Relay bd J31 pins 1-3
Relay bd J32 pins 2-3
Relay bd J32 pins 1-3
Relay bd J40 pins 3-4
Relay bd J40 pins 2-4
Relay bd J40 pins 1-4
Display Driver bd J21 pins 1-2
Display Driver bd J21 pins 1-3
Display Driver bd J21 pins 1-4
Display Driver bd J21 pins 1-5
Display Driver bd J21 pins 1-6
Display Driver bd J21 pins 1-7
6600-0343-000 104
Wire Color
Orange and blue
Orange and green
Orange and red
Value
4.75 to 5.25
4.75 to 5.25
4.75 To 5.25
-4.0 To -5.5
Closed when canopy is up
Closed when canopy is down
Closed momentarily during transition
Closed when both heater doors are open
Closed when both heater doors are closed
Closed when reservoir is closed
Opens when reservoir needs water
Closed when either switch is pressed
Closed when either switch is pressed
Closed when either switch is pressed
Closed when switch is pressed
Closed when switch is pressed
Closed when switch is pressed
Closed when switch is pressed
Closed when switch is pressed
Closed when switch is pressed
© 2001 by Datex-Ohmeda, Inc.. All rights reserved.
Value
4.75 to 5.25
4.75 to 5.25
10.8 To 13.2