LG 47LN5700 / 47LN570T / 47LN570Y / 47LN5710 (CHASSIS:LB33B) Service Manual ▷ View online
52 / 88
G. Network Error
Exterior defect
Established
date
Revised date
LCD TV
Error
symptom
Standard Repair Process
2012. 12 .06
Y
N
Check Network status
Normal
Signal?
Check
S/W Version
S/W Upgrade
SVC
Bulletin?
Normal
Picture?
Y
N
Y
Close
Check Wired ethernet cable connection
Check whether AP has a probelm or not.
Setting Network Networ Status
Y
Try to new network connection
(match with AP and ether setting)
N
Normal
Picture?
Y
Close
N
☞ A7
Check Network connection
Case1 WiFi .
Case1 WiFi .
- Check AP status
Case2 Wired
- Check ethernet Port
Case2 Wired
- Check ethernet Port
Normal
setting?
Check connection
with AP or internet
(WiFi = AP)
(Wired = ethernet
port)
Close
N
Check
Wired, Wifi status
(Cable / sub Assy)
Replace
Main B/D
53 / 88
G. CI+ Competibility Error
Exterior defect
Established
date
Revised date
LCD TV
Error
symptom
Standard Repair Process
2012. 12 .06
Y
N
Check CI CAM status
Read
Information?
Check
CAM S/W
Version
CAM S/W Upgrade
By OTA
SVC
Bulletin?
Normal
Picture?
Y
N
Y
Close
Check defect CI slot pin
Check it’s worked CI+ 1.2 or 1.3
Setting Antenna CI information
Y
N
Check status of CI+ Key in the
In-start menu
In-start menu
Is there
CI+ key?
Check damage of CI slot pin
Or damage of CI CAM
Close
N
Check
Wired, Wifi status
(Cable / sub Assy)
Replace
Main B/D
Replace
Main B/D
Or
Download
CI+ Key
Old version of CI+ 1.2 CAM
is not worked at the TV that is supported CI+ 1.3
Check SVC Bulletin
54 / 88
Contents of LCD TV Standard Repair Process Detail Technical Manual
No.
Error symptom
Content
Page
Remarks
21
B. Power error_No power
Check front display LED
A17
22
Check power input Voltage & ST-BY 3.5V
A18
23
Checking method when power is ON
A19
24
POWER BOARD voltage measuring method
A5
25
26
B. Power error_Off when on, off while
viewing
viewing
POWER OFF MODE checking method
A22
27
B. Power error_Off when on, off while
viewing
viewing
POWER BOARD PIN voltage checking method
A19
28
C. Audio error_No audio/Normal video
Checking method in menu when there is no audio
A24
29
Voltage and speaker checking method when
there is no audio
there is no audio
A25
30
C. Audio error_Wrecked
audio/discontinuation
audio/discontinuation
Voltage and speaker checking method in case of
audio error
audio error
A25
31
D. Function error_ No response in
remote controller, key error
remote controller, key error
Remote controller operation checking method
A27
32
D. VCOM Adjustment
Sequence of the Vcom adjustment
A28
Continued from previous page
55 / 88
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 6.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-
enter the value after replacing the MAIN BOARD.
Standard Repair Process Detail Technical Manual
Check White Balance value
A. Video error_No video/Normal audio
<ALL MODELS>
A4
Established
date
Revised
date
Error
symptom
Content
LCD TV
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 10.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-
enter the value after replacing the MAIN BOARD.
2012. 12 .06
Click on the first or last page to see other 47LN5700 / 47LN570T / 47LN570Y / 47LN5710 (CHASSIS:LB33B) service manuals if exist.