Read LG 22LS4D (CHASSIS:LD73B / NF036A) Service Manual online
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(7) In case of an unusual display in SCART2 mode
6. In case of no sound
(1) Symptom
1) LED is Green.
2) Screen display appears but there is no sound.
2) Screen display appears but there is no sound.
(2) Procedure check
Is the Video input of the
A/V Jack(J1201) normal?
Yes
Same as Block A
Check the input source
No
Is there no sound for
All input(modes)?
Is there no sound
only for HDMI?
No
Yes
Download
the EDID data
Check the signal after
CAX2069 refer to circuit diagram
No
Is there no sound only
for specific input?
(except HDMI,DTV,RF)
Check the signal before
CAX2069 refer to circuit diagram
No
YES
YES
Is there no sound
only for RF?
Check
the Tuner IN/OUT
No
YES
YES
Is there no sound only
for AV/component/PC
input?
Is the output of
CXA2069 normal?
No
YES
Is the IC1300
operating normally?
Replace the IC1300
(MSP4450)
No
Is the IC1301
operating normally?
Replace the IC1300
(STA335BW)
No
YES
Replace the VSC B/D
YES
No
Replace the CXA2069
Is the speaker on?
Set on speaker on in
menu.
No
Is the speaker Cable
normal?
Check the Speaker
Cable.
No
Yes
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