Trio™ Service Manual
0070-10-0591-01
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Repair Information
Troubleshooting
4.4
Troubleshooting
During transportation, storage and use of the
Trio
Monitor, various factors may result in
Trio
Monitor failures or affect normal operation of the device. Some of these factors include:
Unstable network voltage, changing environmental temperature, physical damage or
component aging. During failure conditions, qualified service technicians should perform
module-level service according to the failure classification listed in the table below. Module-
level service is defined as analysis, replacement or test of any module or modules that may
be determined defective within the device. These modules include: Power board, main
control board, TFT assembly, cable or parameter module. The repair operation must be
conducted under specific environmental conditions by a qualified service technician with
access to special test equipment.
4.4.1
Module-level Troubleshooting
Device Failures
MESSAGE/PROBLEM REASON
SOLUTION
No display after power-on
Blown fuse
Replace fuse
Power indicator does not light
Power Supply defective
Replace Power Supply
Fan does not run
Defective component or PCB
Replace component or PCB
No display after power-on or
black screen during operation,
however, power indicator lights
on and fan runs normally
Main control board failure or
display failure
Replace CPU PCB or Display
to confirm failure
Characters are displayed
normally, however waveforms
are displayed intermittently
Data communication error
between main control board
and parameter module
Based on error prompt,
replace CPU PCB, ribbon
cable or parameter module to
confirm failure
An operation or measurement
function is disabled
CPU PCB or corresponding
parameter PCB damage
Examine CPU PCB and
corresponding parameter
PCB
Device responds slowly
Poor performance of power
board
Check power supply and
grounding system
Replace Power Supply board
Poor performance of main
control board
Replace CPU PCB
Poor connection of power
supply or CPU PCB
Replace or repair connectors
Display Failures
MESSAGE/PROBLEM REASON
SOLUTION
When powering on the device,
there is no display or display
goes black during normal
operation
HV inverter PCB damage
Connect external VGA
display to confirm the Failure,
replace HV inverter PCB
Defective display cable
Repair or replace cable
Damage of CPU PCB
Replace CPU PCB
