GE Medical Systems marquette Dash 2000, Service Manual, Page: 102 / 202

TROUBLESHOOTING: Service Tips
4-20 DASH 2000 Patient Monitor Revision A
2000 412-001
Service Tips
Fault/Symptom
Analysis This information is provided for the benefit of service technicians
responsible for the maintenance and repair of the monitor. The
symptoms covered in this part of the Troubleshooting section represent
only a select number of faults that you may encounter and by no means
are intended to cover every possible failure that may occur.
A systematic approach to the diagnosis of problems as well as a general
understanding of the architecture, both hardware and software, of the
monitor are essential to ensure successful troubleshooting of this device.
The manufacturer recommends formal service training before repairs are
attempted on the monitor. The Service Tips listed below combined with
formal training should provide the service technician with skills
necessary to service and repair a monitor, in the event of a malfunction.
Acquisition PCB
Symptoms Symptoms relative to patient signal acquisition such as missing
parameter text and waveform(s) may be associated with acquisition PCB
failure.It is important that you are able to distinguish the difference
between the general format of the display, which is generated by the
processor PCB, versus the patient signals and data that is associated
with these patient signals, a function of data acquisition, which is
generated by the acquisition PCB.
Fault Reason Solution
The string “SERVICE MONITOR”
is displayed on the screen ¥ Communication problems
between DAS Acquisition
board and PCB Mainboard
¥ Calibration problems on DAS
Acquisition
¥ Check connection between
DAS and PCB Mainboard.
¥ Replace DAS Acquisition
board.
The Charging Status LED is
blinking yellow The battery is defective,
disconnected or the battery fuse
SI1 is defective ¥ Check the possible reasons
and try to solve them. Change
battery or replace PCB
Mainboard.
Network communication
problems ¥ PCB Main Connector
defective
¥ Ethernet Connector problems
¥ Check the possible reasons
and try to solve them.
The LED 4 on the PCB
Mainboard is not flashing
continuously after 20 seconds
startup time The monitor is stuck somewhere
in its startup sequence due to a
malfunction on the PCB
Mainboard. ¥ Replace the PCB Mainboard
Video problem – the LCD display
is always dark The LCD display, the backlight
converter, the PCB Mainboard or
Connector to LCD display has a
malfunction ¥ Check the possible reasons
and try to solve them
¥ Replace the devices