Daewoo DLA-32C7LAB Service Manual page 16

Hardware Troubleshooting : Digital Board
2) In spite of picture display, the sound is not generated.
START
Does screen appear?
Is the Sound input Jack
correctly connected?
Is the speaker correctly
connected?
Check
the input power of IC702 is normal
(Pin 6, 7, 12, 13)
Check
the signal output of IC702 is normal
(Pin 2,3,8,9,10,11,16,17)
Check
the signal output of IC701 is normal
(Pin 34, 36)
Check
the input signal of IC701 is
normal
Digital TV mode : Check the path from IC701 to IC201
HDMI mode : Check the path from IC701 to IC501
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
Yes
No
Yes
No
1. Confrim AC connection
2. Confrim Power S/W on
3. Check Video or other PCBs
Check the connection of jack
Check the connection of speaker
Check the SMPS and input voltage
Check the path from IC702 to Speaker
Perhaps IC702 problem.
Perhaps IC701 problem.
Analog TV mode : Check the path from IC701 to TU101
Video, Component mode : Check the path from
each Pin of IC701 to each jack
-16-
Replace main PCB
Replace main PCB