LG 55LH80YD (CHASSIS:LB91F) Service Manual ▷ View 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
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
- Pairing
- S/W version check
- Fan defect
- S/W version check
- Fan defect
▷ TV Rx module fan defect: Check Fan error of TV In-start menu
▷ Media-Box fan defect: Check the red led’s blinking of Media-Box front
▷ Media-Box fan defect: Check the red led’s blinking of Media-Box front
- Wireless interference check
▷ Refer to the installation method guide
- Inner HDMI cable’s connection status (From Rx/Tx module to Main)
Trouble shooting
OSD
OSD
※ Check first when Wireless connection is disable!
※ Check Tip
- In some cases, TV only or Wired mode make easy to check.
※ Caution & Information
- TV set & Media-Box is just 1:1 connection. (No multiple device connection)
- In order to download TV set, you must change the mode to HDMI5 or turn off Media-Box.
- Rx/Tx module’s performance is very sensitive to temperature. So, When you repair the defect, should keep up with
- In order to download TV set, you must change the mode to HDMI5 or turn off Media-Box.
- Rx/Tx module’s performance is very sensitive to temperature. So, When you repair the defect, should keep up with
the original assembly state.
LGE3159
LGE3369 +
LGE7329
LGE7329
WIRELESS LH80
Trouble shooting
Pairing for SVC
1. Turn on the TV SET & Media-Box
2. Connect TV HDMI5 Jack & Media-Box rear [Service only] Jack with HDMI cable
HDMI CABLE
3. Enter the [IN START(Media Box)] menu and go to sub-title [9.Wireless check]
Enter menu and Push the left or right remote-controller button.
Check the Paired Status if changed from NG to OK
※ If s/w version of Tx/Rx module & TV/Media-box main isn’t matched, Wireless can’t be
connected, So at that time check the version and upgrade by usb
4. Remove HDMI cable & check wireless connection.
If connection is not completed, power off and on the TV & Media-Box.
If there are 2 or more wireless tv set, it’s need to be set
channel respectively. (Must separate them more than 10m)
WIRELESS LH80
Trouble shooting
Circuit diagram
TV SET
1. TV MAIN(SD/BD) 2. RX module (SD/BD)
/ /
EAX60691303_SD EAX60691303_BD
Media-Box
1. Box MAIN(SD/BD) 2. TX module (SD/BD)
/ /
EAX52967903_SD
EAX52967903_BD
Apply model
Austrailia: 47/55LH80YD-AB
Total programmable IC
TV MAIN B/D
IC102: MAIN S-FLASH
IC103: MAIN N-FLASH
IC700: FRC S-FLASH
IC902: MICOM
IC105: HDCP
IC101: NVRAM
IC300: HDMI5 EDID
RX MODULE
IC901: SIBEAM B/B S-FLASH
IC1301: PIC MICOM
Media-Box MAIN B/D
IC101: MAIN S-FLASH
IC102: MAIN N-FLASH
IC401: MICOM
IC105: HDCP
IC104: NVRAM
IC502: HDMI S/W EDID
TX MODULE
IC901: SIBEAM B/B S-FLASH
Blue
: USB upgrade
Total download files are under 6ea
EAX52983302_SD
EAX52983302_BD
EAX60902802
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