Daewoo DPN-4274NHS Service Manual - page 44
Manual is about: 42" PDP
of
61
-43-
Main PCB Trouble Diagnosis
5. When No Sound
Do images display on
screen?
N
IC 904's problem.
Replace SUB PCB.
Check start
N
N
N
N
Y
Y
Y
Y
IC901 or IC903 Problems.
Replace SUB PCB.
N
Y
Y
Y
Is the Sound input Jack
properly connected?
Is the Speaker connection
correctly connected?
With a Video input(video&sound) Outputs
of 4th and 19th of JA109 ok?
Check 11th pin of IC901 & 903?
Is the sound output of JP901 in JACK
PCB normal?
Problem of SPEAKER or SOUND CABLE.
So, replace SPEAKER or SOUND CABLE
1. Check AC connection
2. Check Power S/W ON
3. Check MAIN or other PCBs
Check the connection of
Jack(PDP and AV device)
Check the connection of
Speaker
1. Check connection between
MAIN and SUB PCB
2. Or IC104's problem.
Replace MAIN PCB.