Read LG 55LH80YD (CHASSIS:LB91F) Service Manual online
INPUT
MAIN IC
AV
Component
HDMI
RGB
Component
HDMI
RGB
Analog
Digital
WIRELESS MODEL
SIGNAL
CONVERTER
DTC30LM36 +
SIL9134
SIL9134
LVDS
MEDIA-BOX
TX MODULE
HDMI
SIL9125 +
SB9120 +
SB9110
SB9120 +
SB9110
RX MODULE
SB9111 +
SB9121 +
SIL9134
SB9121 +
SIL9134
MAIN IC
LCD
MODULE
LGD V4
LVDS
Wireless
TV SET
HDMI
a
b
c
d
e
f
g
WIRELESS LH80
Service
only
HDMI JACK
HDMI5
HDMI JACK
Wired
HDMI CABLE
▶ Check main ic basic power & power
sequence
▶ Check control line (I2C & etc)
▶ Check input/output video & audio
▶ Check input/output video & audio
signal
▶ Check LVDS cable & wafer locking
(There can be cable’s defect.)
No effect directly
Bad image / No image
- IC’s cold soldering or memory defect accompanied noise on osd
Bad sound / No sound
F
▶ Ticon b/d or Inverter check
▶ Check power
▶ Check power
No effect directly
Bad image or No image
g
No connection
connection
Wireless connection
▶ Check Wireless connecting osd
▶ Check inner HDMI cable connection
▶ Check inner HDMI cable connection
status
(There can be cable’s defect.)
Wireless connection osd is displayed continually
- That osd can be appeared by HDMI cable or Jack defect even
though wireless connection is completed.
(only Rx module)
(only Rx module)
d
e
Check
Symptoms
Defect block
Trouble shooting
OSD
OSD
＊Defect block means from itself to ahead of next part.
＊Wireless TV is similar with the model using LGE3159 or LGE3369 except for wireless parts.
LGE3159
LGE3369 +
LGE7329
LGE7329
Click on the first or last page to see other 55LH80YD (CHASSIS:LB91F) service manuals if exist.