LG 60PG70FR User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PP81C
MODEL : 60PG70FR 60PG70FR-TB
website:http://biz.LGservice.com
Internal Use Only
CH
VOL
MENU
INPUT ENTER

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
CONTENTS
CONTENTS ................................................................................................................ 2
SAFETY PRECAUTIONS............................................................................................3
SPECIFICATION..........................................................................................................4
ADJUSTMENT INSTRUCTION ...................................................................................7
BLOCK DIAGRAM.....................................................................................................16
EXPLODED VIEW .................................................................................................... 18
EXPLODED VIEW PARTS LIST................................................................................19
SVC. SHEET .............................................................................................................20
PRINTED CIRCUIT DIAGRAM..................................................................................31

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An lsolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitary that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this monitor is blown, replace it
with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Due to high vacuum and large surface area of picture tube,
extreme care should be used in handling the Picture Tube. Do not
lift the Picture tube by it's Neck.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on positioin, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩand 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each esposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits sepcified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement .
VApplication Range
This spec is applied to the PDP TV used PP81C Chassis.
V Specification
Each part is tested as below without special appointment.
1) Temperature : 25±5°C (77±9°F), CST : 40±5
2) Relative Humidity: 65±10%
3) Power Voltage: Standard Input voltage (100-240V~, 50/60Hz)
* Standard Voltage of each product is marked by models.
4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with SBOM.
5) The receiver must be operated for about 20 minutes prior to the adjustment.
VTest Method
1) Performance : LGE TV test method followed.
2) Demanded other specification
Safety : CE, IEC specification
EMC : CE, IEC
VModule General Specification
1) 50” WXGA Module
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
50 inch 16:9 Color Plasma Display Module
16:9
PDP50G1####,
RGB Closed(Well) Type
1)Temp. : 0 ~ 55deg
2)Humidity : 20 ~ 80%
3)Temp. : -20 ~ 60deg
4)Humidity : 10 ~ 90%
100-240V~, 50/60Hz
PDP
Glass Filter
LGE SPEC.
Maker : LGIT, Samsung
Chassis
PP81C 50PG70FR-TB
60PG70FR-TB NON-EU LG
Model Name Market Brand Remark
50PG70FR-TB
60PG70FR-TB Safety : IEC/EN60065,
EMI : CISPR13
NON-EU
Model ApplianceMarket
TEST
Remark

2) 50” FHD Module
3) 60” FHD Module
4) 60” WXGA Module
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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
50 inch 16:9 Color Plasma Display Module
16:9
PDP50H2####,
RGB Closed Type
1)Temp. : 0 ~ 60deg
2)Humidity : 20 ~ 80%
3)Temp. : -10 ~ 60deg
4)Humidity : 10 ~ 90%
100-240V~, 50/60Hz
PDP
Glass Filter
LGE SPEC.
Maker : LGIT, Sanken
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
60 inch 16:9 Color Plasma Display Module
16:9
PDP60H2####,
RGB Closed(Well) Type
1)Temp. : 0 ~ 60deg
2)Humidity : 20 ~ 80%
3)Temp. : -10 ~ 60deg
4)Humidity : 10 ~ 90%
100-240V~, 50/60Hz
PDP
Glass Filter
LGE SPEC.
Maker : LGIT
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
60 inch 16:9 Color Plasma Display Module
16:9
PDP60X7#22#,
RGB Closed(Well) Type
1)Temp. : 0 ~ 60deg
2)Humidity : 20 ~ 80%
3)Temp. : -20 ~ 60deg
4)Humidity : 10 ~ 90%
100-240V~, 50/60Hz
PDP
Glass Filter
LGE SPEC.
Maker : Sanken

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
V Model General Specification

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the PP81C Chassis.
2. Specification
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25±5cC of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz.
(5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. ADC calibration
3-1. PC input ADC
(1) Auto RGB Gain/Offset Adjustment
1) Convert to PC in Input-source
2) Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
(1024 x 768 @ 60Hz Black and White Pattern)
Pattern : 54 in Pattern Generator (MSPG-925 SERISE)
[1/2 Black & White Pattern (Refer below picture)].
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction.
(2) Confirmation
1) We confirm whether “0xF1(offset), 0xF2(gain)” address of
EEPROM “0xBC” is “0xAA” or not.
2) If “0xF1”, “0xF2” address of EEPROM “0xBC” isn’t “0xAA”,
we adjust once more
3) We can confirm the ADC values from “0x00~0x05”
addresses in a page “0xBC”
[Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “Auto-RGB” by
pushing “G” key at “Auto-RGB”.
3-2. COMPONENT input ADC
(1) Component Gain/Offset Adjustment
1) Convert to Component in Input-source
2) Signal equipment displays
Impress Resolution 720P
MODEL : 217 in Pattern Generator(720P/60Hz 100%
Color Bar Mode)
PATTERN : 65 in Pattern Generator( MSPG-925 SERISE)
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
(2) Confirmation
1) We confirm whether “0xF3(offset), 0xF4(gain)” address of
EEPROM “0xBC” is “0xAA” or not.
2) If “0xF3”, “0xF4” address of EEPROM “0xBC” isn’t “0xAA”,
we adjust once more
3) We can confirm the ADC values from “0x06~0x0B”
addresses in a page “0xBC”
[Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “Auto-RGB” by
pushing “G” key at “Auto-RGB”.
<Fig. 1> Adjustment pattern(RGB PC)
Adjustment pattern (COMPONENT)

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
4. PCB Assembly Adjustment Items
4-1. Option Adjustment Following BOM
Tool Option1
Tool Option2
Area Option
* Profile: Must be changed the option value because being
different with some setting value depend on module, inch
and market
* Equipment : Adjustment Remote Controller
(1) Push the IN-START key in the Adjust R/C.
(2) Input the Option Number that was specified in the BOM,
into the Shipping area.
(3) Select “Tool Option1/ Tool Option2/ Area Option” by using
D/E(CH+/-) key, and press the number key(0~9)
consecutively
ex) If the value of Tool Option1 is 7, input the data using
number key “7” (Fig. 2)
Caution: Don’t Push “IN-STOP” key after PCB assembly
adjustment.
(4) Adjustment method
Before PCBA check, have to change the Tool option and
Area option
[About PDP
After done all adjustments, Press IN-START button and
compare Tool option and Area option value with its BOM, if it
is correctly same then Change “RF mode” and then unplug
the AC cable.
If it is not same, then correct it same with BOM and unplug AC
cable.
For correct it to the model°Øs module from factory JIG model.
[Don’t push The IN-STOP KEY after completing the function
inspection.
5. S/W Program Download
5-1. Profile
This is for downloading the s/w to the flash memory of the
IC803
5-2. Equipment
(1) PC
(2) ISP_tool program
(3) Download jig
5-3. Connection Structure
5-4. Connection Condition
(1) IC name and circuit number : Flash Memory and IC803
(2) Use voltage : 3.3V (5 pin)
(3) SCL : 15 pin
(4) SDA : 12 pin
(5) Tact time : about 2min and 30seconds
6. Download Method (PCB Ass’y)
6-1. Preliminary Steps
- HD
- FHD
<Fig. 2>

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
(1) Connect the download jig to D-sub jack
(2) Connect the PC to USB jack
6-2. Download Steps
(1) Execute ‘ISP Tool’ program in PC, then a main window will
be opened
(2) Click the connect button and confirm “Dialog Box”.
(3) Click the config button and change speed
E2PROM Device setting: over the 350Khz
(4) Read and write bin file
Click “(1)Read” tab, and then load download file(XXXX.bin)
by clicking “Read”.
(5) Click “Auto(2)” tab and set as below
(6) Click “Run(3)”.
(7) After downloading, check “OK(4)” message.
[Notice : From this sentence, All working is mass production.

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
7. EDID(The Extended Display
Identification Data) / DDC
(Display Data Channel) Download
[Caution
- Use the proper signal cable for EDID Download
- Never connect HDMI & D-SUB Cable at the same time.
- Use the proper cables below for EDID Writing
7-1. Profile:To be possible for plug and play
7-2. Equipment
(1) Adjusting PC with S/W for writing EDID Data.(S/W: EDID
TESTER Ver.2.5)
(2) A Jig for EDID Download
(3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
7-3. Connection Structure
Caution: Never connect HDMI & D-SUB Cable at the same time.
7-4. EDID Data
OXGA/WXGA/Full HD EDID DATA
<Analog : 128bytes>
<HDMI 1 : 256bytes>
<HDMI 2 : 256bytes>
<HDMI 3 : 256bytes>
<Fig. 3> Connection Diagram of DDC Download

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ODetail EDID Options are below (ⓐ, ⓑ, ⓒ, ⓓ, ⓔ)
ⓐProduct ID
ⓑSerial No
=> Controlled on production line
ⓒMonth, Year
=> Controlled on production line:
ex) Monthly: ‘11’ -> ‘0B’
Year: ‘2007’ -> ‘11’
ⓓModel Name(Hex)
ⓔChecksum
=> Changeable by total EDID data
1) Analog(128Byte)
2) HDMI 1/2/3(256Byte)
7-5. Preparation for Adjustment
(1) As above Fig. 3, Connect the Set, EDID Download Jig,,
PC & Cable
(2) Turn on the PC & EDID Download Jig. And Execute the
S/W : EDID TESTER Ver.2.5
(3) Set up the S/W option
Repeat Number : 5
Device Address : A0
PageByte : 8
(4) Power on the Set
1) Sequence of Adjustment
1. DDC data of Analog-RGB
(1) Init the data
(2) Load the EDID data.(Open File).
(3) Set the S/W as below.

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
(4) Push the “Write Data & Verify” button. And confirm “Yes”.
(5) If the writing is finished, you will see the “OK” message.
8. HDCP(High-Bandwidth Digital Contents Protection)
[Confirmation
Before HDCP Download, you have to Set the Configuration
that CMD delay.
-> Configuration -> Option-> I2C delay(Write Byte : 0.5 ms,
Read Byte : 0.5ms, Read CMD Byte : 0.5ms)
(1) Connect D-sub Signal Cable to D-Sub Jack
(2) Input HDCP key with HDCP-key- in-program
(3) HDCP Key value is stored on Main M-STAR
IC(LGE6891DD) which is 0x80~0x90 addresses of
0x00~0x01 page(EEPROM MAP PAGE0~PAGE1 / START
:A080)
(4) AC off/on and on HDCP button of MSPG925 and confirm
whether picture is displayed or not of using MSPG925
(5) HDCP Key value is different among the sets

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
9. Adjustment of White Balance
9-1. Purpose and Principle for Adjustment
of the Color Temperature
(1) Purpose: Adjust the color temperature to reduce the
deviation of the module color temperature.
(2) Principle : To adjust the white balance without the
saturation, Fix the one of R/G/B gain to C0 and decrease
the others.
(3) Adjustment mode: Two modes of Cool and Warm
(Cool data is automatically calibrated by the Medium data)
9-2. Required Equipment
(1) Remote controller for adjustment
(2) Color Analyzer : CA-100+ or CA-210 or same product
- PLASMA TV(ch : 10)
(3) Auto W/B adjustment instrument(only for Auto adjustment)
- Do the white balance adjustment under the 10LUX
[Notice: When using the Color Analyzer with PDP,
recommend the CA-100 more than CA-210.
If CA-100 can not available, it is also good to use the CA-210.
(4) PC (for communication through RGB)
(5) Pattern Generator (MSPG-925FA etc.)
-Before white balance, press the ADJ key 2times and do
the reset like Fig. 4
-To enter White-balance mode, press the ADJ key 2times.
[Caution: System control Host should be “DDC” for adjustment.
9-3. Connecting Diagram of Equipment for
Measuring(For Automatic Adjustment)
(method 1, using IIC, You connect RGB Cable)
(1) Enter the adjustment mode of the white balance
- Enter the white balance adjustment mode at the same time
heat-run mode when pushing the power on by power only
key
- Maintain the white balance adjustment mode with same
condition of Heat-run
- Maintain after AC off/on in status of Heat-run pattern display
(2) Release the white balance adjustment mode
- Release the adjust mode after AC off/on or std-by off/on in
status of finishing the Hear-run mode
- push the “power on” key(IIC Mode) on Adjust remote-
controller.
- Release the Adjust mode when receiving the aging off
command(F3 00 00) from adjustment equipment)
(3) Enter the adjust mode of white balance
- Enter the white balance adjustment mode with aging
command(F3, 00, FF)
OColor Temperature & Color Coordinates Setting
- When adjusting the Color Temperature, Color Analyzer CA-
210(Matrix should be corrected through CH10 of CS-1000)
should be used. When CA-210 have used, it don’t need to fit
the CH10.
- Adjust the Color Temperature based below adjustment color
coordinates.
OTarget Value CA-210(LCD : CH 9, PDP : CH10), CA-100(PDP)
(Standard color coordinate and temperature when using the
CA-100+ or CA210 equipment)
OSynchronization relation between PSM and CSM
<Fig. 4>
PSM
Vivid
Mild
CSM
Cool
Warm

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ODDC Adjustment Command Set
[R/G/B GAIN max value : C0
9-4. Connecting Diagram of Equipment for
Measuring(For Automatic Adjustment)
(method2, using RS-232C, You connect RS-232C Cable)
(1) Enter the adjustment mode of the white balance
- Enter the white balance adjustment mode at the same time
heat-run mode when pushing the power on by power only
key
- Maintain the white balance adjustment mode with same
condition of Heat-run
- Maintain after AC off/on in status of Heat-run pattern display
(2) Release the white balance adjustment mode
- Release the adjust mode after AC off/on or std-by off/on in
status of finishing the Hear-run mode
- push the “Tilt” key (RS-232C Mode) on Adjust remote-
controller.
- Release the Adjust mode when receiving the aging off
command(F3 00 00) from adjustment equipment)
(3) Enter the adjust mode of white balance
- you need push “tilt” key on Adjust remote-controller.
- Enter the white balance adjustment mode with aging
command(F3, 00, FF)
Adjustment
Adjustment
Adjustment

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
9-5. Adjustment of White Balance for
Manual Adjustment(method 3)
Adjustment mode: Two modes of Medium(Vivid) and Warm
(Cool data is automatically calibrated by the Medium data)
- Equipment : 1) Color analyzer(CA100+, CA210) should be
used in the calibrated ch by CS-1000(.(LCD :
CH9, PDP : CH10)
2) Adjustment remocon
- For manual adjustment, it is also possible by the following
sequence.
Operate the zero-calibration of the CA-100+ or CA-210, then
stick sensor to the module when adjusting.
(1) Select white pattern of heat-run by pressing “POWER ON”
key on remote control for adjustment then operate heat run
longer than 15 minutes. (recommend)
(If not executed this step, the condition for W/B will be
different)
(2) Changing to the AV mode by remote control.(Push front-
AV)
(3) Input external pattern(85% white pattern).
(4) Stick sensor to center of the screen and select each items
(Red/Green/Blue Gain and Offset) using D/E(CH +/-) key
on R/C..
(5) Adjust R/ G/B Gain using F/G(VOL +/-) key on R/C.
(6) Adjust two modes of Medium(Vivid) and Warm as below
figure.
(Fix the one of R/G/B and change the others)
1) Default : Medium(Vivid)
2) Push the “VOL +” key twice : Warm
[Refer to the below case to know what value is fixed.
[CASE]
First adjust the coordinate much away from the target value(x, y).
1. x, y > target
1) Decrease the R, G.
2. x, y < target
1) First decrease the B gain,
2) Decrease the one of the others.
- In case of decreasing the x, decreasing the R : fix G
- In case of decreasing the y , decreasing the G : fix R
3. x > target , y < target
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R
4. x < target , y > target
1) First decrease B, so make x a little more than the target.
2) Adjust x value by decreasing the G
(7) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C.
Caution: Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)
10. POWER PCB Assy Voltage
Adjustment(Va, Vs voltage Adjustment)
10-1. Test Equipment:D.M.M 1EA
10-2. Connection Diagram for Measuring
Refer to Fig. 5
10-3. Adjustment Method
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D. M..M. to Va pin of P812,
connect -terminal to GND pin of P812.
3) After turning VR901,voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top
(deviation; ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D. M..M. to Vs pin of P812,
connect -terminal to GND pin of P812.
2) After turning VR951 401, voltage of D.M.M adjustment
as same as Vs voltage which on label of panel right/top
( deviation ; ±0.5V)
<Fig. 7> Connection Diagram of Power Adjustment for Measuring

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
BLOCK DIAGRAM
Block Diagram (In/Out)
AV1 in
SideAV in
(AV2 in)
Comp1 in Comp2 in
RGB in
(D/L)
AV out
CVBS IN
Y/Pb/Pr IN
R/G/B/HS/VS IN
CVBS IN
LINE OUT
LINE IN
LINE_MUTE
RS-232C Rx/Tx MX3232
RF
(Tuner)
PC Audio
in
DISPLAY MODULE
EDID NVM
EDID NVM
HDMI1 HDMI2 HDMI3
USB
TMDS351PAG
HDMI MUX
Zoran
VADDIS-966XD MPEG Decoder
DDR MEM
DDR MEM
SERIAL
FLASH
Mstar
Romeo
LGE6891CD
TW9910
Sub Decoder
NTP3000A
Digital
Audio AMP
MAIN NVM
MC74HC4066
Audio SW
LM324
X4 AMP
SERIAL
FLASH
BD2041
Protect IC
EDID NVM DDC/HDP/CEC
TMDS(HDMI in)
DDC/HPD/CEC
TMDS(HDMI in)
TMDS(HDMI in)
USB(AV I/O, Data I/O)
+5V
CVBS OUT
656 IN
SW_RESET
PART_I2C
PART_I2C
SW_RESET
I2S OUT
PART_I2C
LVDS
EN
MPEG RX/TX
MPEG RESET I2S IN
656 IN
TMDS(HDMI in)
DDC/HPD/CEC
DDC/HPD/CEC
[CEC not through HDMI MUX, direct JACK to MAIN IC]
DDC
DDC
DDC
UART_Rx/Tx
AUDIO_SW LINE IN
LINE IN
LINE IN
Y/Pb/Pr IN LINE IN
Y/C IN
LINE IN
EDID NVM
ROM_I2C
DSUB_DDC
x0.55 x0.55
x0.55
x0.55 S_VIDEO_DET LINE_MUTE
LINE OUT
CVBS OUT x4
x4
x0.55
LINE IN CVBS IN
SIF IN
TUNER_I2C
PART_I2C
ROM_I2C
HDMI_SEL

- 17 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Block Diagram (I2C & Communication Line)
AV1 in
SideAV in
(AV2 in)
Comp1 in Comp2 in
RGB in
(D/L)
AV out
CVBS IN
Y/Pb/Pr IN
R/G/B/HS/VS IN
CVBS IN
LINE OUT
LINE
IN
LINE_MUTE
RS-232C Rx/Tx MX3232
RF
(Tuner)
PC Audio
in
DISPLAY MODULE
EDID NVM
EDID NVM
HDMI1 HDMI2 HDMI3
USB
TMDS351PAG
HDMI MUX
Zoran
VADDIS-966XD MPEG Decoder
DDR MEM
DDR MEM
SERIAL
FLASH
Mstar
Romeo
LGE6891CD
TW9910
Sub Decoder
NTP3000A
Digital
Audio AMP
MAIN NVM
MC74HC4066
Audio SW
LM324
X4 AMP
SERIAL
FLASH
BD2041
Protect IC
EDID NVM DDC/HDP/CEC
TMDS(HDMI in)
DDC/HPD/CEC
TMDS(HDMI in)
TMDS(HDMI in)
USB(AV I/O, Data I/O)
+5V
CVBS
OUT
656 IN
SW_RESET
PART_I2C
PART_I2C
SW_RESET
I2S OUT
PART_I2C
LVDS
EN
MPEG RX/TX
MPEG RESET I2S IN
656 IN
TMDS(HDMI in)
DDC/HPD/CEC
DDC/HPD/CEC
[CEC not through HDMI MUX, direct JACK to MAIN IC]
DDC
DDC
DDC
UART_Rx/Tx
AUDIO_SW LINE
IN
LINE
IN
LINE
IN
Y/Pb/Pr IN LINE
IN
Y/C IN
LINE
IN
EDID NVM
ROM_I2C
DSUB_DDC
x0.55 x0.55
x0.55
x0.55 S_VIDEO_DET LINE_MUTE
LINE OUT
CVBS OUT x4
x4
x0.55
LINE
IN
CVBS IN
SIF IN
TUNER_I2C
PART_I2C
ROM_I2C
HDMI_SEL

- 18 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
EXPLODED VIEW
A2
580
240
501
590
603
200
206
201
204
207
208
209
205
205
207
206
202
203
250
304
305
300
120
121
570
571
560 301
302
303
306
602
601
520
400
900
901
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE

- 20 -
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only

- 21 -
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only