LG LH9000 Series Assembly instructions

ⓒ LG Electronics. Inc.2008
LED LCD TV Repair Guide
New models 2009
Applicable to model numbers xxLH9000
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ⓒ LG Electronics. Inc.2008
LGE3369A
IC100
RGB
COMPONENT
F-SCART
AV3
BUF_TS_CLK/ERR/SYN/DATA
[0]
AV_CVBS_IN
COMP_Y/Pb/Pr
SC1_CVBS_IN
SC2_CVBS_IN
DSUB_ R/G/B
74LVC541A
Buffer
IC502
CI Slot
FE_VMAIN
FE_TS_DATA[0:7]
ÆCI_MDI[0:7]
H-SCART
SC1_R/G/B
FE_
VOUT
DTV/MNT_VOUT
MAX3232CDR
IC403
SPDIF SPDIF_OUT
DSUB_H/VSYNC
CI_TS_DATA[0:
7]
CI_Data[0:7]ÅPCM_D[0:7]
PCM_A[8:14]
AUDIO IN
(PC)
DGB_TX/RX
DDR2 SDRAM
(1Gb)
IC300
NAND Flash
IC102
(64MB)
USB
PCM_A[0:7]
SDDR_D[0:15
]
TDDR_D[0:15
]
SDDR_A[0:12
]
MP6211DH
IC402
USB Power
TDDR_A[0:12
]
USB1_DM/DP
Serial Flash
For Boot
IC103
HDMI
1/2/3
Rear :
3
LGE7329A
IC900
Panel
LED
200Hz
TMDS351PAGR
IC604
TMDS[0:7
]
HDMI_CEC
HPD
5V_HDMI
I2C
1. LH9000-ZA Block Diagram
TDFW-G235D
TU1200
74LCX244
Buffer
IC501
PCM_A[0:
7]
CI_ADDR[0:7]
LVDS
EEPROM
IC105
I2C
SPI_CK/CS/D0/D
1
Side AV
USB0_DM/DP
HDMI
4 Side
AUDIO Out (Head
Phone)
RS-232C
DDR2 SDRAM
(512Mb)
IC301
Digital amp
(NTP3100L)
IC701
I2S L/R
TMDS[0:7
]
HPD,
5V_HDMI
Audio
Switch
IC702
AUDIO Out (B/T
Headset)
LG5110
IC3502
LVDS
Local Key
LED A’ssy
IR & RGB Sensor
DDR2 SDRAM
(512Mb)
IC1000/IC1001
EEPROM
IC3504
Serial Flash
IC902
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ⓒLG Electronics. Inc.2009
Contents of LED LCD TV Standard Repair Process
No. Error symptom (High category) Error symptom (Mid category) Page Remarks
1 No video/Normal audio 1
2 No video/No audio 2
3 Video error, Picture broken/ Freezing 3
4 Color error 4
5
A. Video error
Vertical/Horizontal bar, residual image,
light spot, external device color error 5
6Nopower 6
7B. Power error Off when on, off while viewing, power auto
on/off 7
8 No audio/Normal video 8
9C. Audio error Wrecked audio/ discontinuation/ noise 9
10 No response in remote controller, key error 10
11 D. Function error External device recognition error 11
12 E. Noise Circuit noise, mechanical noise 12
13 F. Exterior error Exterior defect 13
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
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ⓒLG Electronics. Inc.2009
Normal
audio Y
N
Move to No
video/No audio
No video
Normal audio Check Back Light
On with naked eye On Y
N
Check Power
Board
12v,5v etc.
Normal
voltage Y
N
Replace Main Board
Repair Power
Board or parts
Check Power Board 20V /12V or 24v output
Normal
voltage YReplace LED
Drive B/D or
module
N
Repair Power
Board or parts
End
Always check & record S/W Version and White
Balance value before replacing the Main Board Replace Main Board Re-enter White Balance value
※Precaution
Established
date Electronics 6-3
Standard Repair Process
Revised date
2009. 7 .29
1/13
Error
symptom A. Video error
No video/ Audio OK
☞A3☞A1
☞A2
☞A4 & A7
1
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
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LED LCD TV
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ⓒLG Electronics. Inc.2009
Normal
voltage?
Check various
voltages of Power
Board ( 5V,12V,20V
or 24V…)
No Video/
No audio
Check and
replace
MAIN B/D
Y
Replace Power
Board and repair
parts
NEnd
Standard Repair Process
A. Video error
No video/ No audio
☞A5
Established
date Electronics 6-3
Revised date 2/13
Error
symptom
2
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2009. 9 .01
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ⓒLG Electronics. Inc.2009
A. Video error
Picture broken/ Freezing
Y
N
☞A6
N
Check RF Signal level
Normal
Signal?
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Check
S/W Version
Booster menu
On→Off: Check
Off→On: Check
S/W Upgrade
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→DVD Player ,Set-Top-Box, Different maker TV etc`
SVC
Bulletin?
Replace
Main B/D
Check
Tuner soldering
Normal
Picture?
Y
N
Y
Close
Normal
Picture? YClose
■Menu→Setup →Booster
. By using Digital signal level meter
. By using Diagnostics menu on OSD
( Menu→Setup→Diagnostic)
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Normal
Picture? Y
Contact with signal distributor
or broadcaster (Cable or Air)
NN
Normal
Picture?
Y
Close
N
☞A7
Standard Repair Process
Established
date Electronics 6-3
Revised date 3/13
Error
symptom
3
2009 . 7. 29
2009. 9 .01
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ⓒLG Electronics. Inc.2009
Color
error?
Y
N
※Check
and replace
Link Cable
(LVDS) and
contact
condition
Y
N
Replace Main B/D
Color
error?
Check error
color input
mode
Check color by input
-External Input
-COMPONENT
-RGB
-HDMI/DVI
Y
External device
/Cable
normal
External Input/
Component
error
Check
external
device and
cable
Y
External device
/Cable
normal
RGB/
HDMI/DVI
error
Check external
device and
cable
Replace Main B/D
Replace Main B/D
N
N
A. Video error
Color error
☞A8
N
Y
End
Replace module
Request repair
for external
device/cable
Replace
T-Con
Board N
Y
Color
error?
LGD Module
Only
Other Module
Color
error?
Check Test pattern
☞A11
☞A10 ☞A27
Standard Repair Process
Established
date Electronics 6-3
Revised date 4/13
Error
symptom
2009 . 7. 29
2009. 9 .01
LED LCD TV
4
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ⓒLG Electronics. Inc.2009
Screen
normal?
N
YCheck external
device
connection
condition
Y
N
Check and
replace Link
Cable
Normal?
Y
N
Screen
normal? Replace Main B/D
Replace
module
Check color condition by input
-External Input
-Component
-RGB
-HDMI/DVI
End
Vertical/Horizontal bar, residual image, light spot
Request repair
for external
device
A. Video error
Vertical / Horizontal bar, residual image,
light spot, external device color error
☞A14
External device screen error-Color error
External
Input
error Connect other external
device and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
N
Y
Replace
Main B/D
Screen
normal?
Check screen
condition by
input
-External Input
-Component
-RGB
-HDMI/DVI
Request repair for
external device
Component
error
RGB
error
HDMI/
DVI
Connect other external
device and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Replace
Main B/D
Screen
normal?
N
Y
Check S/W Version
Y
N
Check
version
S/W Upgrade
Y
N
Normal
screen?
End
Y
N
Replace T-Con Board
LGD Module Only
Replace
Module
Other Module
Replace module
in abnormal displaying
after exchanging T-Con B'd
End
Established
date Electronics 6-3
Revised date 5/13
Error
symptom
Standard Repair Process
☞A12 ☞A13
Check Test pattern
☞A27
5
Screen
normal?
2009 . 7. 29
2009. 9 .01
LED LCD TV
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ⓒLG Electronics. Inc.2009
B. Power error
No power
Power LED
On? Y
N
DC Power on
by pressing Power Key
On Remote control
Y
N
Normal
operation? Check Power
On ‘”High”
Check Power cord
was inserted properly
Check
Power LED Replace
Power
B/D
Measure voltage of each output of Power B/D
N
Y
Normal
voltage? Replace Main B/D
N
Y
OK?
Replace Main B/D
N
Y
Normal? Check ST-BY 5V
Replace Power B/D
N
Y
Normal
voltage?
Replace Power
B/D
Y
☞A15
☞A16
☞A17
☞A18
Standard Repair Process
Established
date Electronics 6-3
Revised date 6/13
Error
symptom
※’09 years new model apply mechanical power switch
to reduce power consumption in stand-by status.
If mechanical power switch off
→Doesn’t turn on by remote control
→Doesn’t appear LED light
Please refer to the A21 Page
6
. Stand-By: Red
. Operating: Green
Check & Repair
Mechanical Power switch
on Local control of TV
※
☞A19
Close
2009 . 7. 29
2009. 9 .01
LED LCD TV
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ⓒLG Electronics. Inc.2009
B. Power error
Off when on, off while viewing, power auto on/off
Error? N
Y
Check Power Off
Mode
Fix A/C code & Outlet
and describe 3 wave
length
Check A/C code
Check for 3 wave length
Check outlet
Replace Main B/D
CPU
Abnormal
(If Power Off mode
is not displayed)
Check Power B/D
voltage
Y
N
Replace Main B/D
Normal
voltage?
Replace Power B/D
Replace Power B/D
N
Y
Normal? End
※Caution
Check and fix exterior
of Power B/D Part
☞A20
☞A21
Established
date Electronics 6-3
Revised date 7/13
Error
symptom
Standard Repair Process
7
Status Power off List Explanation
"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL
"POWEROFF_OFFTIMER" Power off by OFF TIMER
"POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER
"POWEROFF_INSTOP" Power off by INSTOP KEY
"POWEROFF_AUTOOFF" Power off by AUTO OFF
"POWEROFF_ONTIMER" Power off by ON TIMER
"POWEROFF_RS232C" Power off by RS232C
"POWEROFF_RESREC" Power off by Reservated Record
"POWEROFF_RECEND" Power off by End of Recording
"POWEROFF_SWDOWN" Power off by S/W Download
Normal
"POWEROFF_UNKNOWN" Power off by unknown status except listed case
"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble
Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal
* Please refer to the all cases which
can be displayed on power off mode.
Abnormal
1
2009 . 7. 29
2009. 9 .01
LED LCD TV
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