GE Eagle 1000, Инструкции по обслуживанию

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GE Medical Systems EAGLE 1000
Page 89
Information Technologies
Servicing Instructions 227 468 01 Rev. G
Backup battery for the clock
The lithium battery used to run the clock has a service life of approx. 5 years. The cut-
off voltage is 2.5 V at 0.005 mA. If, after the instrument has been switched off for about a
minute, the time and the date do not appear correctly on the configuration screen or on the
recording, the lithium battery is completely depleted and must be replaced immediately.
In the case of a cyclic startup failure refer to 4.6 Troubleshooting tips.
4.4 Safety information
4.4.1 Insulating foil
The insulating foil in the instrument serves to isolate the floating components, i.e., to ensu-
re the required air gaps. This foil is thus of great significance from a viewpoint of safety
and must, under all circumstances be put back into the instrument when it is being reas-
sembled. Pieces of insulating foil are located. (Where the pcb is equipped).
x under the PCB ECG Monitor
x under the PCB Oximeter
x under the PCB Press/Temp in the case of PCBs Press/Temp or Temp without isolating
foil around the PCB
x twice round the PCB PRESS/TEMP or
x around the pcb Temp
x around the power unit
4.4.2 High voltage
On the PCB ECG Monitor upper right when looking at the reverse side, next to the buzzer
is the CCFT supply for the LCD Reverse Video. In stand-by mode this generates 565 V AC
at 30 to 40 kHz. Sparking as a result of contact with this voltage causes un
pleasant burns! It is thus important to exercise caution when touching this PCB.
4.4.3 ESD protection
All instrument PCBs bear semiconductors which must be protected from electrostatic
discharge. When working on open instruments and when handling PCBs it is thus im
portant to observe the ESD safety precautions. It is especially important that service tech-
nicians always establish contact between the PCB and ground before touching a compo-
nent or a cable.
When working on an open device or on PCBs use an ESD protective underlay. This
should be connected to a non-fused earth conductor potential. During battery operation
the instrument non-fused earth conductor connector must be connected to the ESD pro-
tective underlay. The service technician must be connected to the ESD protectiveunderlay
via an armband. Use an ESD protective travel bag to transport PCBs.