GE Giraffe Service Manual page 6

Table of Contents
4.7 Servo Controlled Oxygen ....................................................................................................................................... 58
Chapter 5: Repair Procedures ............................................................................................ 65
5.1 Hood Removal for Replacement ....................................................................................................................... 66
5.2 Porthole Door Replacement ................................................................................................................................. 67
5.3 Uprights and End Caps .......................................................................................................................................... 68
5.4 Compartment Probe Repairs .............................................................................................................................. 70
5.5 Lower Unit Repairs .................................................................................................................................................... 71
5.6 Bed Tilt Brake Pad Replacement ....................................................................................................................... 85
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4.6.1 Raising and Lowering the Elevating Base ........................................................................................ 53
4.6.2 Incubator Heaters and Bed Safety Thermostat ............................................................................ 53
4.6.3 Power Supplies ............................................................................................................................................. 54
4.6.4 Switches/Thermostat ................................................................................................................................ 54
4.6.5 Humidifier Heater/Safety Thermostat ............................................................................................... 55
4.6.6 Compartment Air Probe and Patient Probes .................................................................................. 55
4.6.7 Incubator Heat Sink Sensor Thermistor ............................................................................................ 56
4.6.8 Elevating Base Motor ................................................................................................................................. 56
4.6.9 Troubleshooting the 50 Pin Ribbon Cable........................................................................................ 56
4.6.10 Troubleshooting the Toroidal Transformer ................................................................................... 57
4.6.11 Interpreting Serial Numbers ................................................................................................................ 57
4.7.1 Servo Controlled Oxygen Service Screen ......................................................................................... 58
4.7.2 Servo Controlled Oxygen Alarm Messages ..................................................................................... 59
4.7.3 Servo Controlled Oxygen Troubleshooting Tips ............................................................................ 63
4.7.3.1 Check Supply Valves ..................................................................................................................... 63
4.7.3.2 Check Calibration Valve/Calibration Fan ............................................................................. 63
4.7.3.3 Check Cooling Fan ......................................................................................................................... 63
4.7.3.4 Sensor Housing Temperature Sensor Temperature to Resistance Curve ........... 64
5.3.1 Re-installing the Upright .......................................................................................................................... 69
5.5.1 Removing the Chassis Cover with the Storage Drawer in Place .......................................... 71
5.5.2 Incubator Fan/Motor/Optical Sensor ................................................................................................. 72
5.5.3 Incubator Heater Replacement ........................................................................................................... 73
5.5.3.1 To Remove the Heater Closest to the Foot of the Bed .................................................. 73
5.5.3.2 To Remove the Heater Closest to the Head of the Bed ................................................ 74
5.5.4 Elevating Base .............................................................................................................................................. 75
5.5.5 Chassis Replacement ................................................................................................................................ 79
5.5.6 Bed Up/Down Pedal Switch .................................................................................................................... 79
5.5.7 Humidifier Assembly Repairs ................................................................................................................. 81
5.5.7.1 Tips for Repairing the Humidifier Assembly on an Old Style Unit ............................ 81
5.5.7.2 Humidifier Disassembly ............................................................................................................... 82
5.5.7.3 Humidifier Reassembly ................................................................................................................ 83
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