Troubleshooting Flowchart - Fujitsu Plasmavision PDS4229W-B Service Manual

TROUBLESHOOTING FLOWCHART

LED lamp blinking
Turn power on and check
state of lamp.
LAMP STATE
Not lighted.
RED RED
Blinks
Blinks continuously.
continuously.
RED
Blinks once
RED
Blinks twice
RED
Blinks four times
RED
Blinks five times
GREEN
Lights steadily for
more than 10 sec.
Is on-screen display
normal?
YES
POWER SUPPLY STATE
Power supply
circuit faulty.
Power turned off Power turned off
immediately. immediately.
Power turned off
after 10 sec.
Power turned off
after 10 sec.
Power not turned
off, LED blinks only.
Power not turned
off, LED blinks only.
NO
All input image
faulty.
Video input image
faulty.
S-video input image
faulty.
Component video
input image faulty.
RGB input image
faulty.
– 13 –
Note : 1. Since a voltage is applied to the Main Power
PCB and PFC PCB heat sinks while the set is
operating, do not touch the heat sinks.
2. If the PFC PCB insulation sheet is not
installed when assembling, the PFC PCB
fuse will blow.
3. After the power cord plug was pulled out, do
not pull out the connector on the Main Power
PCB until the green LED(D531) turns off.
REMEDY
∗ Replace Main
Power PCB.
∗ Vs and -Vy must be adjusted.
Check 1 Check 1
Check 2
Check 3
Replace Main/Digital
PCB Assy.
Replace Video PCB
Assy.
Check 4
Signal processing
PCB faulty.
Check 5
Check 5
Check 6
Check 7
Replace Main/Digital
PCB Assy.