Mindray WATO EX-55Pro, Service Manual

Page: 346 / 474

8-92
Failure
Description
Possible Cause Judgment Method Recommended
Action
displays a
black screen
and the alarm
indicator is off. analysis.
The CPU board is
abnormal. Power on the anaesthesia machine. If
the sound of the valves can be heard
and the top lamp works properly, the
CPU board is abnormal. Otherwise,
proceed with the analysis. Replace the CPU
board.
The power board
is abnormal. If there is no response when you try to
power on the anaesthesia machine,
see the fault analysis at the beginning
of this table. Replace the cable
or power board.
The
anaesthesia
machine
displays a
blank screen or
black screen. The cable is not
connected
properly. Check whether the LVDS and
backlight interface are normal. If so,
proceed with the analysis. Connect the cable
properly.
The mother board
is in poor
condition. Open the cover plate, power on the
anaesthesia machine, and test pin 19
of mother board J3. If the voltage of
this pin is beyond the range 3.0-3.6 V,
the mother board is poor condition.
Otherwise, proceed with the analysis. Replace the
mother board.
The CPU board is
in poor condition. If the fault cannot be identified by
using the preceding two methods, the
CPU board is faulty. Replace the CPU
board.
The segment
code screen is
not displayed
or is displayed
incorrectly. The key control
board is in poor
condition. If the segment code screen does not
display any content and is dark, the
key control board is in poor
conditions. Otherwise, proceed with
the analysis. Replace the key
control board.
The electronic
flowmeter is in
poor condition. If the segment code screen is
displayed but the content is different
from that of the float flowmeter, the
electronic flowmeter board is in poor
condition. Replace the
electronic
flowmeter board.