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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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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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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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
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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
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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?
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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
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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
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ⓒLG Electronics. Inc.2009
No audio
Screen normal
Check user
menu >
Speaker off Off N
Y
Cancel OFF and describe
Check audio B+
20V or 24V of
Power Board
Normal
voltage Y
N
Replace Power Board and repair parts
Check
Speaker
disconnection
N
Y
Replace Speaker
Replace MAIN Board End
C. Audio error
No audio/ Normal video
☞A22 ☞A23
Disconnection
Established
date Electronics 6-3
Revised date 8/13
Error
symptom
Standard Repair Process
8
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ⓒLG Electronics. Inc.2009
→Wrecked audio/discontinuation/noise is same after “Check input signal” compared to No audio
C. Audio error
Wrecked audio/ discontinuation/noise
Wrecked audio/
Discontinuation/
Noise for
all audio
Check and replace
speaker and
connector
Wrecked audio/
Discontinuation/
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only
for Analog
Wrecked audio/
Discontinuation/
Noise only
for External Input Connect and check
other external
device
N
Y
Normal
audio?
Check and fix external device
Replace Power B/D
N
Y
Normal
voltage?
Check input
signal
-RF
-External Input
signal
Signal
normal?
(When RF signal is not
received)
Request repair to external
cable/ANT provider
Y
Check audio
B+ Voltage (20V or 24V)
Replace Main B/D
(In case of
External Input
signal error)
Check and fix
external device
Replace Main B/D
N
End
Established
date Electronics 6-3
Revised date 9/13
Error
symptom
Standard Repair Process
☞A24
9
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D. General Function Problem
Remote control & Local switch checking
Y
N
1. Remote control(R/C) operating error
Move
Power problem
Section
2. Local(Mechanical) switch 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
Baterry of R/C
Check & Repair
Cable connection
Connector solder
Normal
operating? Check B+ 5V
On Main B/D
☞A25 Normal
Voltage?
Close
N
N
Check 5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
☞A21
Check IR
Output signal Normal
Signal?
N
Y
Repair/Replace
IR B/D
N
☞A25
Replace
Main B/D
Y
Y
N
Check R/C
Operation Normal
operating?
Y
Check & Repair
Cable connection
Connector solder
Normal
operating?
Close
NCheck & Replace
Assembly status
(Key PCB + tool )
☞A25
Check Key
Output signal
Y
Normal
operating?
Close
NNormal
Signal?
Repair/Replace
Local switch B/D
N
Replace
Main B/D
Y
Standard Repair Process
Established
date Electronics 6-3
Revised date 10/13
Error
symptom
10
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Check technical
information
- Fix information
- S/W Version
N
Y
Technical
information?
Check
input
signal
Signal
input?
Y
N
External Input and
Component
Recognition error
Check and fix
external device/cable
RGB,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 Electronics 6-3
Revised date 11/13
Error
symptom
Standard Repair Process
11
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Check
location of
noise
Identify
nose
type
Circuit
noise
Replace LED drive B/D
Replace LIPS B/D
Mechanical
noise Check location
of noise
OR
※When the nose is severe, replace the module
(For models with fix information, upgrade the
S/W or provide the description)
OR
※If there is a “Tak Tak” noise from the
cabinet, refer to the KMS fix information and
then proceed as shown in the solution manual
(For models without any fix information,
provide the description)
OR
※Mechanical noise is a natural
phenomenon, and apply the 1st level
description. When the customer does not
agree, apply the process by stage.
※Describe the basis of the description
in “Part related to nose” in the Owner’s
Manual.
E. Noise
Circuit noise, mechanical noise
<With LED drive B/D>
<Without LED drive B/D >
Established
date Electronics 6-3
Revised date 12/13
Error
symptom
Standard Repair Process
12
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ⓒLG Electronics. Inc.2009
Replace module
Zoom part with
exterior damage Module
damage
Cabinet
damage Replace cabinet
Replace remote controller
Remote
controller
damage
Stand
dent Replace stand
F. Exterior defect
Exterior defect
Established
date Electronics 6-3
Revised date 13/13
Error
symptom
Standard Repair Process
13
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Established
date
Standard Repair Process Detail Technical Manual
Revised
date A1
Error
symptom
Content Check LCD back light with naked eye
A. Video error_No video/Normal audio Electronics 6-3
A1
2009 . 7. 29
2009. 9 .01
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Remove back cover ÆPower On ÆCheck backlighting at 4 points.
Remove back cover ÆPower On ÆCheck backlighting at 4 points.
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ⓒLG Electronics. Inc.2009
Electronics 6-3
Standard Repair Process Detail Technical Manual
LED drive B+ 24V measuring method
A. Video error_No video/Normal audio
A2
Established
date
Revised
date
Error
symptom
Content
A2
Measure DC 24V applying to LED drive B/D from Power Board.
Output 24V from Power Board -> supply to LED drive B/D.
Check Pin contacting statement and connection statement.
LED drive B/D
POWER
BOARD
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Electronics 6-3
Standard Repair Process Detail Technical Manual
Check LED drive B/D supply voltage
A. Video error_No video/Normal audio
A3
Established
date
Revised
date
Error
symptom
Content
A3
Check each voltage output (5.2V,12V,24V) from power board.
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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.
Electronics 6-3
Standard Repair Process Detail Technical Manual
Check White Balance value
A. Video error_No video/Normal audio
A4
Established
date
Revised
date
Error
symptom
Content
A4
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