Philips PCL304 - Page 59

8-27
8.1.7.
Troubleshoot
flow
chart
Troubleshooting
Main
Board
Connect AC Adapter
to the computer
Set Power Switch
te ON
Does
Power Indication
LED light?
Check power supply
voltage of AC Adapter
Is
voltage 5.6V,6.1V,7.15V
of plug ?
Check power supply
voltage of Main Board
Peplace AC Adaptes
Dees Beeper sound?
No
Voltage +5 Present
Is anything
displayed on
the screen
Yes Adjust the contrast
of LCD Displey
Replace Power Boerd
Replace Main Board
fs anything
No
displayed on
screen?
1 Check connector
a
dae
aie
cable
between
LCD
and Main Boerd
Any reguler
vertical line display
screen
Yes
Check supply voltage
on for LCD
Check connector
cable between LCD
and Mein Board
No
Any
Signal at CNS on
the Main
Board
No
Replace Main Boerd
Replece LCD Display
1) Repisce Main Boerd
Yes
45 765 A12
CS 55 843