Hdmi Video / Audio Output - LG UBK80 Service Manual

3. NO HDMI VIDEO / AUDIO OUTPUT
When unit is connected to HDMI TV using HDMI cable, picture shows bad color, no output or mixed
color on the screen.
3-1. HDMI
3-1-1. Solution
Replace MAIN board.
3-1-2. How to troubleshoot (Countermeasure)
1) Please check soldering status of HDMI jack and check HDMI 5.1 VA at IC701 pin1.
2) If soldering status and 5.1 VA are abnormal, replace MAIN board.
3-1-3. Service hint (Any picture / Remark)
[5.1VA to HDMI_5V]
5.1VA
C701
10uF
ONE POINT REPAIR GUIDE
IC701
R701
EN/EN
FLT
4
10K
GND
IN
OUT
5
C702
100nF
DGND DGND
IC701 IC701
 
< MAIN board bottom view >
5.1VA
3
 
2
1
D G N D
3-38
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HDMI_5VA
R704
0OHM
D G N D
Only for training and service purposes.