Troubleshooting; Device Failures - EDAN M3 Service Manual

6 Troubleshooting

In transportation, storage and use of monitor, various factors such as unstable network voltage,
changing environmental temperature, falling-down or impact, component aging may all result in
monitor failures and therefore affect normal application of the device. In failure conditions,
professional personnel with the experience of repairing electronic medical devices should
perform component-level upkeep for the failure classification listed in the table below.
Component-level upkeep means based on analyzing, replacing or trial-operating the component,
we can pinpoint the failure on a certain component of the device, such as power board, Main
control board, LCD assembly, measuring cable or parameter module, etc. Repair of only some
components means component-level repair. The repair operation must be conducted by a service
engineer with abundant experience and with the assistance of special equipment and in specific
environment and conditions.

6.1 Device Failures

Failure
No display after power-on,
power indicator light is not
on or fan does not run.
No display after power-on
or black screen during
operation, however, power
indicator lights on and fan
runs normally.
Characters are displayed
normally,
waveforms are displayed
intermittently.
An operation
measurement function is
disabled.
Device is occasionally
stoned.
M3 Vital Signs Monitor Service Manual
Possible cause
①
Fuse damage (If has
fuse on)
②
Power damage
③ Component short-circuit ③ Anchor the short-circuit
① Main control board
failure or display failure.
①
Data communication
however error between Main control
board
module
①Main control board or
or
corresponding component
damage
①
Moment
interference of network
②
Poor performance of
power board
③
Poor performance of
Main control board
①
②
component
① Refer to the information
about
failure.
① Based on error prompt,
replace Main control board,
and parameter keyset or parameter module so
as to confirm the failure.
①
board
components
① Check power supply and
intensive
grounding system
②
③
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Solution
Replace fuse
Replace power board
confirming
Examine Main control
and corresponding
Replace power board
Replace Main control board
display