Read LG 47LH80YD (CHASSIS:LB91F) Service Manual online
INPUT
MAIN IC
AV
Component
HDMI
RGB
Component
HDMI
RGB
LGE3159
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
LGE3369 +
LGE7329
LGE7329
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
▶ Control line check (I2C & etc)
▶ Check input/output video & audio
▶ Check input/output video & audio
signal
No effect directly
No effect directly
No connection
Bad image
- IC’s cold soldering or memory defect accompanied noise on osd
Bad sound / No sound
Wireless connecting osd is displayed continually
Wireless connecting osd is displayed continually
- There is no video signal from Rx module to TV main ic, so TV
understand this time like disconnection state and display
connecting
osd continually. And then, if TV is not activated rightly within
15min,
it will go to st-by mode.
b
▶ Check power & control line
▶ Check input/output signal
▶ Check inner HDMI cable connection
▶ Check input/output signal
▶ Check inner HDMI cable connection
status
(There can be cable’s defect.)
No effect directly
No connection
No connection
Bad image / Bad or No sound
Wireless connecting osd is displayed continually
Wireless connecting osd is displayed continually
- No image
C
No effect directly
Wireless connection
▶ Check the EDID of HDMI & RGB
▶ Check cable & contact error
▶ Check cable & contact error
Bad (noise) image / No image
- osd is good
Bad sound / No sound
a
Check
Symptoms
Defect block
Trouble shooting
OSD
OSD
＊Focused on Wireless connection
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