LG 47GA6400-UD / 47GA6450-UD (CHASSIS:LA37G) Service Manual ▷ View online
D. Function error
Remote control & Local switch checking
Y
N
1. Remote Control (IR) operating error
Check R/C itself
Operation
Normal
operating?
Normal
operating?
Y
Close
Replace R/C
If R/C operate,
Explain the customer
cause is interference
from light in room.
Check R/C Operating
When turn off light
in room
Check & Replace
Battery of R/C
Check & Repair
Cable connection
Connector solder
Connector solder
Normal
operating?
Check B+ 3.5V
On Main B/D
☞A27
Normal
Voltage?
Close
N
N
Check 3.5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
☞A4
Check IR
Output signal
Normal
Signal?
N
Y
Repair/Replace
IR B/D
N
☞A27
Replace
Main B/D
Y
☞A27
Standard Repair Process
Established
date
Revised date
LCD TV
Error
symptom
43
2012.01.16
Y
2013.01.30
D. Function error
Qwerty operating checking
Y
N
2. Motion Remote (Bluetooth) operating error
Check Qwerty
R/C itself
Operation
Normal
operating?
Normal
operating?
Y
Close
Check & Replace
Battery
Show ok
message?
Press the
wheel
Show ok
message?
Close
N
N
N
Y
Standard Repair Process
Established
date
Revised date
LCD TV
Error
symptom
44
2012.01.16
Replace
Qwerty
Remote
Turn off/on the set
and press the
wheel
Press the back key
about 5sec
Close
* If you conduct the loop at 3times, change the Qwerty Remote.
Y
Check the
INSTART menu
RF Receiver ver
is “00.00”?
Y
Check & Repair
RF assy
connection
N
Down load the Firmware
* INSTART MENU
Æ15.RF
Remocon Test
Æ3. Firmware
download
Y
RF Receiver ver
is “00.00”?
N
Close
☞A28
☞A7
☞A7
2013.01.30
D. Function error
Wifi operating checking
3.Wifi operating error
Check the
INSTART menu
Wi-Fi Mac value
is “NG”?
Y
Check & Repair
Wi-Fi cable
connection
N
Check the Wi-Fi wafer
(P4301)_1pin
Standard Repair Process
Established
date
Revised date
LCD TV
Error
symptom
45
2012.01.16
Change the Wi-Fi
Assy
Normal
Voltage?
Close
Y
Y
N
Replace
Main B/D
Wi-Fi Mac value
is “NG”?
N
Close
☞A29
☞A7
☞A7
☞A29
2013.01.30
Check technical
information
- Fix information
- S/W Version
information
- Fix information
- S/W Version
N
Y
Technical
information?
Check
input
signal
input
signal
Signal
input?
Y
N
External Input and
Component
Recognition error
Check and fix
external device/cable
external device/cable
HDMI/
DVI, Optical
Recognition error
Replace Main B/D
Replace Main B/D
Fix in
accordance
with technical
information
D. Function error
External device recognition error
Established
date
Revised date
LCD TV
Error
symptom
Standard Repair Process
46
2012.01.16
2013.01.30
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