GE Giraffe Service Manual

The following switches are membrane switches. When closed the resistance should be less than 200 ohms.
Display Touch Panel Switches
Alarm Silence Display Driver bd J21 pins1-2 Closed when switch is pressed
>37 degrees Display Driver bd J21 pins1-3 Closed when switch is pressed
Servo Control Display Driver bd J21 pins1-4 Closed when switch is pressed
Up Display Driver bd J21 pins1-5 Closed when switch is pressed
Down Display Driver bd J21 pins1-6 Closed when switch is pressed
Intervention Display Driver bd J21 pins1-8 Closed when switch is pressed
Manual Mode Inc. Display Driver bd J21 pins1-9 Closed when switch is pressed
4.6.5 Humidier Heater/Safety Thermostat
The humidier has two separate heater elements rated at 225 watts at 104 volts. They are connected in
parallel for 115 volt operation and in series for 230 volt operation. The humidier safety thermostat is in series
with the heater. It opens at 130 +/-5 C and closes at 90 +/-8 C. Measure the resistance at J53.1 to J53.3.
The resistance of each heater is about 144 ohms so it should measure about 72 ohms for 115 units, 288 ohms
for 230 units.
4.6.6 Compartment Air Probe and Patient Probes
Use the service screen to read the temperature of the compartment and patient probes. There are two
thermistors in each probe. During stable temperature conditions the thermistors should read the same
resistance within a few ohms.
Patient probe #1 Control bd J4 pins 1-3, 2-3
Patient probe #2 Control bd J2 pins 1-3, 2-3
Compartment probe Control bd J1 pins 1-2, 3-4
Temperature (C) Resistance (Ohms)
20 12527
25 10000
30 8037
35 6500
© 2001 by Datex-Ohmeda, Inc.. All rights reserved. 6600-0356-000 103 55
Chapter 4: Troubleshooting

GE Giraffe Specifications

General

Manufacturer	GE Healthcare
Type	Incubator
Humidity Range	30% to 95% RH
Power Supply	50/60 Hz
Model	Giraffe
Features	integrated scale
Control Modes	Air and Skin