LG 55LH575A Service Manual page 12

5. Component Video No signal
Check input signal f ormat.
Is it supported?
OK
Check Component cable
OK
Check AV Jack CVBS signal
R3407,R3408,R3409
OK
Check Component signal Y
VA3415,R3421,C3411,R3407
R340, C321
OK
Check Component signal Pb
VA3413,R3420,R3408
OK
Check Component signal Pr
VA3412,R3419,R3409
OK
Replace IC101 or Main Board
6. HDMI Video No signal
Check input signal f ormat.
Is it supported?
OK
Check HDMI cable
OK
Check DDC in-start menu
OK
Check TMDS signal
HDMI1 : JK3201
HDMI2 : JK3202
1,3,4,6,7,9,10,12 pin
OK
Check HPD
HDMI1 : JK3201 19 pin
HDMI2 : JK3202 19 pin
OK
Replace Main IC (IC101)
or Main Board
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
NG
Replace AV Jack JK3401
NG
Replace VA3415,R3421,C3411,R3407R340, C321
NG
Replace VA3413,R3420,R3408
NG
Replace VA3412,R3419,R3409
Check DDC component
NG
HDMI1 : AR3208, AR3207, D3200
HDMI2 : AR3234, AR3231, D3203
Replace HDMI Jack
NG
HDMI1 : JK3201
HDMI2 : JK3202
Replace HPD component
HDMI1 : VA3206, R3208, Q3202,
NG
R3209, R3212, R3210
HDMI2 : VA3201, R3201, Q3200,
R3204, R3203, R3200
Replace DDC component
NG
HDMI1 : AR3208, AR3207, D3200
HDMI2 : AR3234, AR3231, D3203
NG
Replace Main Board
Replace IC101
or Main Board
NG
or HDMI Jack
HDMI1 : JK3201
HDMI2 : JK3202
- 12 -
Replace
Main Board or
NG
HDMI Jack
HDMI1 : JK3201
HDMI2 : JK3202
LGE Internal Use Only