In Case Of No Sound - LG 32HIZ22 Service Manual

(5) When set doesn't display normally at Component, RGB mode
Is the IC800
normal?
(6) In the case of becomes unusual display from HDMI mode
Is the IC1200
normal?
Is the IC800
normal?

2-4. In case of no sound

(1) Symptom
1) LED is White.
2) Screen existent, but Sound isn't.
(2) Check follow
All input(mode)
is no sound?
No
Yes
Only HDMI is
no sound?
No
Yes
Only AV input
is no sound?
No
Yes
Only RF is
no sound?
No
No
No
Yes
No
Is the Speaker
on in Menu?
Yes
No
Set on speaker in menu
Download the EDID data
Is the output
Lout1 & Vout1 of IC300
normal?
No
Check the signal after IC300 refer
to circuit diagram.
Check the Tuner In/Out.
Is the
Input voltage, IIC
Communication and HV
sync normal?
Is the
Input voltage, IIC
Communication and HV
sync normal?
Is the
Input voltage, IIC
Communication and HV
sync normal?
Is the speaker
cable normal?
Yes
No
Check the speaker cable
Replace IC300.
Yes
- 21 -
Replace IC800.
No
Replace IC1200.
No
Replace IC800.
No
IC400 operate
normally?
Yes
No
IC401 operate
normally?
Yes
No
Replace IC401.
Replace IC400.
Replace VSC B/D.
Yes
IC402 operate
normally?
No
Replace IC402.