GE Eagle 1000, Servicing Instructions

Page: 29 / 148

GE Medical Systems EAGLE 1000
Page 29
Information Technologies
Servicing Instructions 227 468 01 Rev. G
In the models with additional features the PCB ECG Monitor also acts as a mother-
board. The PCB Oximeter, the PCB for non-invasive blood pressure and the PCB for
temperature or for temperature and 2 invasive blood pressures can be added to this
board.
In conformity with “Cardiac floating” there is a high-impedance isolating transformer refer-
red separately to the ECG input module, the PCB Oximeter, the PCB module for tempera-
ture and the PCB module for 2 invasive blood pressures. Both pressure measuring com-
ponents are electrically connected. These PCBs are insulated from the non-floating com-
ponents of the system and each other by spacing and insulating foil.
Warning: It is thus important that when disconnecting or replacing PCBs in the
system to ensure PCBs and circuits are correctly installed and the insulat-
ing foil positioned accordingly.
2.2.2 PCB ECG Monitor
The PCB ECG monitor appears as a block diagram in the PCB circuit diagrams. The
circuits are arranged so that (viewing Eagle 1000 from the rear) the floating ECG Proces-
sing is located in the left-hand third, in the remainder all the other functions:
Floating Non-Floating
x Display Controller
x ECG Controller
x Interface Output
x ECG Filter x Controller
x Power Supply (instrument, battery, floating)
x ECG Input x Interface Input
This means that ECG Processing and the Central System signal processing and system
controller are implemented on this PCB. The description of each is given below, indicating
the connected modules and their functions.
The PCB plugs and sockets are shown in the S-Plan of the system plans and are alloca-
ted as listed below. This allocation is useful in finding the pin configuration in the P circuit
diagrams of the PCB ECG Monitor.