In Case Of No Sound - LG 22LS4D Service Manual

(7) In case of an unusual display in SCART2 mode
Is the Video input of the
A/V Jack(J1201) normal?
Yes
Same as Block A

6. In case of no sound

(1) Symptom
1) LED is Green.
2) Screen display appears but there is no sound.
(2) Procedure check
Is there no sound for
All input(modes)?
YES
Is there no sound
only for HDMI?
YES
Is there no sound
only for RF?
YES
Is there no sound only
for AV/component/PC
input?
Yes
Is there no sound only
for specific input?
(except HDMI,DTV,RF)
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Only for training and service purposes
No
Check the input source
No
No
Download
the EDID data
No
Check
the Tuner IN/OUT
No
Is the output of
CXA2069 normal?
YES
Check the signal after
CAX2069 refer to circuit diagram
No
Check the signal before
CAX2069 refer to circuit diagram
Is the speaker on?
Is the speaker Cable
normal?
No
Replace the CXA2069
Is the IC1300
operating normally?
Is the IC1301
operating normally?
Replace the VSC B/D
- 20 -
No
Set on speaker on in
YES
No
Check the Speaker
Yes
No
Replace the IC1300
YES
No
Replace the IC1300
YES
menu.
Cable.
(MSP4450)
(STA335BW)
LGE Internal Use Only