GE Eagle 1000, Servicing Instructions

Page: 30 / 148

GE Medical Systems EAGLE 1000
Page 30
Information Technologies
Servicing Instructions 227 468 01 Rev.G
Name Connection Denotation Page P-Plan Subtitle
AA Conductor Foil Display 9 Display
AB For Optrex LCD only 9 Display
AC Cable Battery 6 Power
AD Cable PCB Power Supply 6 Power
AE Cable LCD Backlight 9 Display
AF Flat cable Recorder 8 Interface_Out
AG Flat cable PCB Non-Invasive Blood 5 Interface_In
Pressure
AH Flat cable PCB Oximeter (Sp02) 5 Interface_In
AI Debugging Connector only 7 Control
AJ Stackable Connector PCB Press/Temp 5 Interface_In
AK Flat cable ECG Input 2 ECG_Input
AM Conductor Foil Membrane Keypad 5 Interface_In
AN Flat cable RS 232 External Port 8 Interface_Out
AO Flat cable Nurse Call Adapter 8 Interface_Out
2.2.3 System power supply
see diagram “System Power Supply”
The power supply is in protection class I with a protective ground terminal. A primary-
regulated wide-range power supply unit, delivering 15.5 V DC, precludes the necessity of a
power toggle switch. This unit also acts as a charger for the 12-V system battery. All con-
trol functions are regulated on the PCB ECG Monitor. A charge controller measures the
battery current across a resistance referred to zero, activates the front panel charge indi-
cator and communicates with the processor. Should the output voltage of the power unit
fail to reach 15.5 V, the battery will not be charged to full capacity.
The battery meets the temporary high current demand of the recorder and the PCB Non-
Invasive Blood Pressure as well as current peaks and is also essential for retaining data.
As the battery continuously is discharged, this is indicated by an 11.5V comparator, which
triggers the warning display “Battery” blinking and the audible alarm signal sounding.
When the charge drops below 10 V after storing the data the 10V comparator switches off
the system to protect the battery.