4-2
SM 701730-01E
4.2
Flow Chart
Figure 4.1, “Troubleshooting Flow Chart” shows an analytical method for handling malfunctions.
END
Maintenance Service is Required
Contact your nearest YOKOGAWA representative as listed on the back cover of this manual.
Power ON
Check the
fuse.
LCD OK?
LCD OK?
START
Execute self test.
*
*
†
Replace
the fuse.
Check secondary
voltage of power supply.
Check secondary
voltage of power
supply not connected
to mother board.
Fuse OK?
Voltage OK?
Replace
power supply
unit.
(1)
Check each
board for shorts.
(2)
Check error
contents.
‡
Replace CPU
board ass’y.
Check LCD
backlight.
Monitor
display OK?
Backlight
lights up?
Replace LCD
ass’y.
Replace lamp
unit or
inverter unit.
INITIALIZE
Check display.
Connect RGB VIDEO
OUT to monitor.
No error
messages?
Execute performance
test.
(3)
Check self test
results.
Self test
successful?
(4)
Check
performance
test results.
Performance
test successful?
* See section 4.4 for detailed instructions.
†
To initialize the settings, reboot the
DL1720E/DL1740E/DL1740EL while pressing the
RESET key.
‡
The monitor to be connected must be VGA
supported.
Voltage OK?
Figure 4.1 Troubleshooting Flow Chart
