LG 50PC5D Series User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS :PA75C
MODEL : 50PC5D 50PC5D-UL
website:http://biz.LGservice.com
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 same specified type.
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.
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
CANADA: LG Electronics Canada, Inc. 550 Matheson
Boulevard East Mississauga, Ontario L4Z 4G3
USA : LG Customer Interactive Center
P.O.Box 240007, 201 James Record Road Huntsville,
AL 35824
Digital TV Hotline [phone]
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

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SPECIFICATIONS.................................................................4
ADJUSTMENT INSTRUCTIONS ..........................................5
BLOCK DIAGRAM ..............................................................11
EXPLODED VIEW...............................................................20
EXPLODED VIEW PARTS LIST .........................................21
REPLACEMENT PARTS LIST............................................22
SCHEMATIC DIAGRAM..........................................................
PRINTED CIRCUIT BOARDS.................................................
TABLE OF CONTENTS

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SPECIFICATIONS
- The specifications shown above may be changed without prior notice for quality improvement.
42PB4DA
(42PB4DA-UA)
50PB4DA
(50PB4DA-UA)
60PB4DA
(60PB4DA-UA)
MODELS
44.5 x 30.2 x 12.2 inches
1130.0 x 768.1 x 310.4mm
44.5 x 28.1 x 3.3 inches
1130.0 x 715.0 x 85.0 mm
75.8 pounds / 34.4 kg
68.0 pounds / 30.8 kg
51.5 x 35.7 x 14.6 inches
1308.0 x 906.1 x 370.0 mm
51.5 x 33.3 x 3.5 inches
1308.0 x 845.0 x 89.5 mm
93.5 pounds / 42.4 kg
83.1 pounds / 37.7 kg
60.9 x 41.8 x 17.6 inches
1548.0 x 1061.0 x 448.0 mm
60.9 x 38.9 x 3.9 inches
1548.0 x 988.0 x 98.5 mm
163.1 pounds / 81.0 kg
135.6 pounds / 61.5 kg
AC100-240V ~ 50/60Hz
NTSC-M, ATSC, 64 & 256 QAM
VHF 2-13, UHF 14-69, CATV 1-135, DTV 2-69, CADTV 1-135
75 ohm
32 ~ 104°F (0 ~ 40°C)
Less than 80%
-4 ~ 140°F (-20 ~ 60°C)
Less than 85%
Dimensions
(Width x Height x Depth)
Weight
Power requirement
Television System
Program Coverage
External Antenna Impedance
Environment condition
Including stand
Excluding stand
including stand
excluding stand
Operating Temperature
Operating Humidity
Storage Temperature
Storage Humidity

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Application Range
This spec sheet is applied all of the PDP TV, PA75C 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 equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver be must kept 110V, 60Hz
when adjusting.
(5) The receiver must be operational for about 15 minutes
prior to the adjustments.
1) After receiving 100% white pattern, the receiver must be
operated prior to adjustment. (Or 8. Test Pattern
condition in EZ - Adjust)
2) Enter into White Pattern
- Press POWER ON Key on the Service Remote
Control (S R/C)
- Enter the Ez - Adjust by pressing ADJ Key on the
Service Remote Control (S R/C).
- Select 10. Test Pattern using the CH +/- Key and
select the White by pressing the direction Key.
Display the 100% Full White Pattern.
[Set is activated HEAT-RUN without signal generator in
this mode.
OHEAT RUN
Preliminary action is applied to the test for afterimage
discharge detection, and 100% FULL WHITE PATTERN
must be operated automatically.
OTest for afterimage discharge detection
1) Pressing Power On key
- Only operating by pressing Power On key
2) Full Test Pattern(2 min 30sec) --> Full Black
Pattern(30sec) --> Full White Pattern(maintenance)
- Full White Pattern when the main power is turned on
again after being turned off
3) Pattern Mode is deselected by pressing CH +/-, Exit Key.
[Set is activated HEAT-RUN without signal generator in this
mode.
ADJUSTMENT INSTRUCTIONS
If you turn on a still screen more than 20 minutes (Especially
Digital pattern(13 CH), Cross Hatch Pattern), an afterimage
may occur in the black level part of the screen.
Test Pattern 2min 30sec
Test Pattern 30sec

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. PSU(Power Supply Unit) Voltage
Adjustment (Va, Vs Voltage Adjustment)
Adjust the voltages Va and Vs supplied from the PSU to the
module within the specified range of each module to supply
the stable power
3-1. Test Equipment
(1) D.M.M 1EA
(2) Voltage adjustment bar
3-2. Adjustment(60”)
(1) Va Voltage Adjustment
1) Connect + terminal of D.M.M to Va pin of P812 and
connect – terminal to GND pin of P812.
2) Adjust VR901 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
(2) Vs Voltage Adjustment
1) Connect + terminal of D.M.M to Vs pin of P812 and
connect – terminal to GND pin of P812.
2) Adjust VR951 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
3-3. Adjustment (50”)
(1) Va Adjustment
1) Connect + terminal of D.M.M to Va pin of P12 and
connect – terminal to GND pin of P12.
2) Adjust VR951 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P12 and
connect – terminal to GND pin of P12.
2) Adjust VR901 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
3-4. Adjustment(42”)
(1) Va Voltage Adjustment
1) Connect + terminal of D.M.M to Va pin of P812 and
connect – terminal to GND pin of P812.
2) Adjust VR901 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
(2) Vs Voltage Adjustment
1) Connect + terminal of D.M.M to Vs pin of P812 and
connect – terminal to GND pin of P812.
2) Adjust VR951 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
ADJUSTMENT INSTRUCTIONS
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
Connection Diagram of Power Adjustment for Measuring
(Power Board): 60”
Connection Diagram of Power Adjustment for Measuring
(Power Board): 50”
Connection Diagram of Power Adjustment for Measuring
(Power Board): 42”(EAY32808901)

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. Component 480i/1080p RGB
1080p Adjustment
Component 480i/1080p RGB 1080p adjustment to set the
black level and the Gain to optimum.
4-1. Test Equipment
(1) Service R/C
(2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern
Generator (480i/1080i The Horizontal 100% Color Bar
Pattern adjust to within 0.7±0.1Vp-p)
[Because the above pattern can differ by the model and
pattern for each device, you must check the pattern first.
4-2. ADC 480i Component1 Adjustment
(1) Check the connection Component1 to the Test Equipment.
(MSPG-925FA => Model: 209, Pattern: 65)
(2) Select Component1 as the input with 100% Horizontal
Color Bar Pattern(HozTV31Bar) in 480i Mode and select
‘Normal’ in screen.
(3) After receiving signal for at least 1 second, press the ADJ
Key on the Service R/C to enter the ‘Ez - Adjust’ and select
the ‘3. ADC 480i Comp1’.
Pressing the Enter Key to adjust automatically.
(4) When the adjustment is over, 'ADC Component1 Success’
is displayed.
(5) If the adjustment has errors, 'ADC Component1 480i Fail’
is displayed. And error massage(‘Component1 Not
Connected’ or ‘Not Valid Format’ or ‘Check Signal Status’)
is displayed for 1 second.
4-3. ADC 1080i Component1/RGB
Adjustment
(1) Check the connection Component1, RGB to the Test
Equipment (MSPG-925FA => Model: 225, Pattern: 65)
(2) Select Component1 as the input with 100% Horizontal
Color Bar Pattern(HozTV31Bar) in 1080i Mode and select
‘Normal’ in screen.
(3) After receiving signal for at least 1 second, press the ADJ
Key on the Service R/C to enter the ‘Ez - Adjust’ and select
the ‘4. ADC 1080i Comp1/RGB’.
Pressing the Enter Key to adjust automatically component1.
(4) When the adjustment is over, 'ADC Component1 Success’
is displayed. If the adjustment has errors, 'ADC
Component1 1080i Fail’ is displayed.
(5) After the Component1 adjustment is over, convert the
RGB-DTV Mode and start RGB adjustment.
When the adjustment is over, 'ADC RGB 1080P Success’
is displayed.
(6) Readjust after confirming the case Pattern or adjustment
condition where the adjustment errors.
Error massage is ‘Component1 Not Connected’ or ‘Not
Valid Format’ or ‘Check Signal Status’.
(7) After adjustment is complete, exit the adjustment mode by
pressing the ADJ KEY.
5. EDID(The Extended Display
Identification Data)/DDC
(Display Data Channel) Download
It is the feature to implement the “Plug and Play” which
automatically reconfigures the user’sl environment to directly
use by exchanging information without any command directly
to the PC or the monitor by the user, which is established by
the VESA
5-1. HDMI EDID Data Input
(1) Required Test Equipment
1) PC, Jig for adjusting DDC. (PC serial to D-sub
Connection equipment)
2) S/W for writing DDC(EDID data write & read)
3) D-Sub cable
4) Jig for HDMI Cable connection
(2) Preparation for Adjustments &
Setting of Device
1) Set devices as below and turn on the PC and JIG.
2) Open S/W for writing DDC (EDID data write & read).
(operated in DOS mode)
ADJUSTMENT INSTRUCTIONS
<Fig. 1> Adjustment Pattern: 480i/1080i 60Hz Pattern
LCD TV SET
(or Digital Board)

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5-2. EDID DATA for PA75C
:EDID for HDMI-1 (DDC (Display Data Channel) Data)
EDID table =
:EDID for HDMI-2 (DDC (Display Data Channel) Data)
EDID table =
:EDID for HDMI-3 (DDC (Display Data Channel) Data)
EDID table =
:EDID DATA for RGB
EDID table =
ADJUSTMENT INSTRUCTIONS
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 8A
0123456789ABCDEF
0020316F1478405030220221023150750
10 65 03 0C 00 10 00 01 1D 00 72 51 D0 1E 20 6E 28
20 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
30 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A 20 E0
40 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A D0 8A
50 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18 26 36
60 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00 00 1A
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 8A
0123456789ABCDEF
0020316F1478405030220221023150750
10 65 03 0C 00 20 00 01 1D 00 72 51 D0 1E 20 6E 28
20 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
30 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A 20 E0
40 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A D0 8A
50 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18 26 36
60 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00 00 1A
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 8A
0123456789ABCDEF
0020316F1478405030220221023150750
10 65 03 0C 00 30 00 01 1D 00 72 51 D0 1E 20 6E 28
20 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
30 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A 20 E0
40 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A D0 8A
50 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18 26 36
60 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00 00 1A
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 F0
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 00 11 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1A 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 F6
0123456789ABCDEF
0020304000E1F008051001E3040803700
10 C4 8E 21 00 00 1C F1 27 00 A0 51 00 25 30 50 80
20 37 00 C4 8E 21 00 00 1C 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 31

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
6. Adjustment of White Balance
6-1. Required Test Equipment
(1) Color Analyzer : CA-210 (CH 9)
=> To adjust color temperature of PDP, CS-1000 is the
Color Analyzer(CA-210) and should be set to use CH 9
in which white, red, green, and blue color are corrected.
Conduct the adjustment according to the coordinates for
White Balance adjustment in the table below.
(2) Computer for adjusting (necessary for the automatic
adjustment, possible to communicate with the RS-232C,
Baud Rate : 115200)
(3) Video Signal Generator MSPG-925F 720p, 216Gray
(Model :217, Pattern 78)
6-2. Connection Diagram of Equipment
for Measuring (Automatic Adjustment)
6-3. White Balance Adjustment Method
Basically it uses the internal pattern but when internal pattern
is not possible, you can select HDMI input for adjustment.
Through the option at the most bottom part of the Ez Adjust
Menu 7.White Balance menu, you can select NONE, INNER
and HDMI, and the default is set to INNER. When the
adjustment cannot be done with the internal pattern, you can
select HDMI input for adjustment.
For manual adjustment, press the ADJ KEY of the adjustment
R/C to enter Ez Adjust 7.White-Balance, and the pattern is
automatically displayed. (When you set the Option to INNER,
the default is always set to INNER)
(1) Connect the set according to the internal pattern or HDMI
input in accordance with measuring device connection
diagram.
(2) Set the Baud Rate of RS-232C to 115200. It is set to
115200 as default.
(3) Connect the RS-232C Cable to the set.
(4) Connect the HDMI Cable to the set. (Limited to the set with
HDMI option)
(5) Select and adjust the model applicable to PA75C chassis
from the adjuster.
[RS-232C command used for the automatic adjustment]
ÔWb 00 00-----white balance Automatic Adjustment Start
ÔWb 00 10-----Gain Adjustment start (Internal pattern)
ÔJa 00 ff------Adjustment Data
ÔJb 00 c0
Ô...
ÔWb 00 1f-----Gain Adjustment End
Ô*(wb 00 20(Start), wb 00 2f(End))----- When adjust Off-set
ÔWb 00 ff------White Balance Automatic Adjustment End
(Disappear Inside pattern)
[Adjustment Map]
ADJUSTMENT INSTRUCTIONS
(internal pattern)
Connection Diagram for Internal Pattern
Connection Diagram for HDMI Input
wb
wb
wb
wb
wb
wb
00
00
00
00
00
00
00
10
1f
20
2f
ff
White Balance Adjustment Start
Gain Adjustment Start(Internal white pattern)
Gain Adjustment End
Offset Adjustment Start(Internal white pattern)
Offset Adjustment End
White Balance Adjustment End
(Disappear Internal pattern)
RS-232C COMMAND
[CMD ID DATA]
Meaning
R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
Jg
Jh
Ji
Cool
Ja
Jb
Jc
Mid
RS-232C COMMAND
[CMD ID DATA]
CENTER
(DEFAULT)
Jd
Je
Jf
00
00
00
192
192
192
127
127
127
Warm
Min Max
184
187
192
64
64
64
Cool
192
183
161
64
64
64
Mid
192
159
95
64
64
64
Warm

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
6-4. Automatic Adjustment
(1) Execute POWER ON(Â) of the adjustment R/C to execute
automatic adjustment.
(2) Set the Baud Rate to 115200.
(3) Always start adjustment with “wb 00 00” and end
adjustment with “wb 00 ff”
(4) Adjust the offset if necessary
6-5. Manual Adjustment
(1) Required Test Equipment: CA-210
=> To adjust color temperature of PDP, CS-1000 is the
Color Analyzer(CA-210) and should be set to use CH 9
in which white, red, green, and blue color are corrected.
Conduct the adjustment according to the coordinates for
White Balance adjustment in the table below.
(2) Enter the ‘Ez - Adjust’ by pressing the ADJ on the Service
R/C.
(3) Select 10.TEST PATTERN using the CH + / - KEY and
press the Enter KEY to execute a heat run for more than
30 minutes.
(4) Execute a Zero Calibration for CA-210 and put it at
distance of less than 10Cm from the PDP module surface
center during the adjustment.
(5) Select ‘7. White-Balance’ of ‘Ez - Adjust’ by pressing the
ADJ KEY on the Service R/C. Then enter adjustment mode
by pressing the Right KEY (
G ) .
(The internal pattern of full white appears by pressing
G )
(6) The adjustment is conducted in three levels of color
temperature; COOL, MEDIUM, and WARM.
When the white balance is Cool,
Fix B Gain 192, fix R-Cut / G-Cut / B-Cut 64,
and use R Gain / G Gain to adjust the High Light.
When the white balance is Medium,
Fix R Gain 192, fix R-Cut / G-Cut / B-Cut 64,
and use G Gain / B Gain to adjust the High Light.
When the white balance is Warm,
Fix R Gain 192, fix R-Cut / G-Cut / B-Cut 64,
and use G Gain / B Gain to adjust High Light.
(7) Use the Vol. +, - key for adjustment.
(8) When the adjustment is completed, press the ENTER (Á
KEY) button to move to the Ez –Adjust screen. Press the
ADJ KEY to exit the adjustment mode.
Full White 216gray
[Cool]
X; 0.276±0.002 Y; 0.283±0.002
Color temperature: 11000°K
9uv: 0.000
[Medium]
X; 0.285±0.002 Y; 0.293±0.002
Color temperature: 9300°K
9uv: 0.000
[Warm]
X; 0.313±0.002 Y; 0.329±0.002
Color temperature: 6500°K
9uv: 0.000
ADJUSTMENT INSTRUCTIONS

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
Block Diagram - Overview
Audio L/R
Flash
(16MB) DDR(64MB)
DDR(64MB)
74LVC14APW
TEA6420
(Audio
SW) MC33078
(AMP)
CS5340
(A/D)
MTV416
(Micom)
NTP3000
(Digital AMP)
X-tal(54M)
TMDS341A
(3x1,S/W)
74F08D
EEPROM
AT/NT
Tuner
64Bit I/F
Reset
CVBS
CVBS/Y/C
Y/Cb/Cr
R/G/B
H/V Sync
RGB-PC
HDMI
0/1/2
COMP 1 COMP 2
AV 1 AV 2
RGB-PC
Audio L/R
I2S
MNT out
( L/R) SPDIF OUT
I2S
RS-232C Dead IC when Standby
Option
Alive IC when Standby
Video Audio
Video
Front
End
Dual
HDMI
Rx
HD/SD
Video
Encoder
Audio
DSP
BCM3553 MCLK
MCLK
HDMI CEC
HDMI CEC (To Micom)
To Micom
SDA SCL
SIF
IF(AT)
Buffer
Single LVDS
Connector
Digital out (W)XGA
Local KEY
IR
Buffer Buffer
24C16
AGC CTL (From BCM)
USB2.0
I2S Audio Input
VSB/QAM/NTSC/SIF
DDR(128MB)
DDR(128MB)

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
Signal path for CVBS, Component, RGB
Comp1_Y
H Sync
V Sync
BCM3553
Comp1_Pb
Comp1_Pr
74F08D
Component 1
Input
Component 2
Input
RGB Input
RGB H_Sync
Side AV CVBS Rear AV
Rear S_Video Y/C
Side S_Video Y/C
CVBS CVBS 2
L1/C1
CVBS 3
L2/C2
ANT/ Cable
TUNER
IF_P
IF_N
IF_P from TUNER for DTV
IF_N from TUNER for DTV
CVBS 1
EEPROM
FOR EDID
DDC SDA DDC SCL
RGB V_Sync
LVDS_Tx
Out
Only for HD
Component_1 S/W Component_2 S/W Rear_CVBS_ S/W
RGB S/W
GPIO[0:6]
Comp2_Y Comp2_Pb
Comp2_Pr RGB_G RGB_B RGB_R
DDC SCL to Micom
for Download
LPF 6 Mhz
LPF 30Mhz LPF 30Mhz LPF 30Mhz LPF 30Mhz LPF 30Mhz
LPF 30Mhz
LPF 6 Mhz
LPF 6 Mhz
LPF 6 Mhz
DDC SDA to Micom
for Download
DVO Out[0:29]
Rear_S-Video_ S/W Side_CVBS_ S/W
Side_S-Video_ S/W
31p
LVDS
Con.
31p
LVDS
Con.

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
Signal path for HDMI
BCM3553
TMDS0 RX0+/- TMDS0 RX1+/- TMDS0 RX2+/-
TMDS0 RXCLK+/-
DDC SDA0
DDC SCL0 EEPROM
For EDID
HDCP SDA
HDCP SCL
NDA
NCL
HDMI 0
HDMI 1
HDMi —CEC
+5V Power_0
Hot Plug Detect_0
TMDS1 RX0+/- TMDS1 RX1+/- TMDS1 RX2+/-
TMDS1 RXCLK+/-
DDC SDA1
DDC SCL1
EEPROM For EDID
HDMi —CEC
+5V Power_1
Hot Plug Detect_1
LVDS_Tx
Out
HDMI 2 TMDS2 RX0+/-
TMDS2 RX1+/- TMDS2 RX2+/-
TMDS2 RXCLK+/-
DDC SDA2 DDC SCL2 EEPROM
For EDID
HDMi —CEC
+5V Power_2
Hot Plug Detect_2
TMDS341A
TMDS0
INPUT
DDC SDA DDC SCL
TMDS1
INPUT
TMDS2
INPUT
TMDS RX0+/-
TMDS RX1+/- TMDS RX2+/- TMDS RXCLK+/-
Hot Plug Detect_0
TMDS
Out
TMDS_Rx Input
HDMi_Sel_0
HDMi_Sel_1 HDMi_Sel_2
Hot Plug Detect_1 Hot Plug Detect_2
+5V Power_0
+5V Power_1
+5V Power_2
GPIO[0:8]
Switch
Selection
DDC INPUT
MTV416
MTV416
Micom
HDMi —CEC
Parallel connections with
HDMi 0,1,2
Only for HD 31P
LVDS
Con.
31P
LVDS
Con.
DVO Out[0:29]
EEPROM
for HDCP
EEPROM
for HDCP
DDC SDA0
DDC SCL0 DDC SDA1
DDC SCL1
DDC SDA2 DDC SCL2
DDC OUT

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
AV1_Audio AV2_Audio
MNT_Audio
HDMI
(PC/DTV)
Comp2_Audio
RGB_Audio
Comp1_Audio
[L1 / R1] [L2 / R2] [L3 / R3] [L4 / R4] [L5 / R5]
Switch
Switch
[Rout/Lout] I2C SCL/SDA
Audio
Switch
[TEA6420]
AUDIO ADC
[CS5340]
I2S_CLK_IN/DATA_IN /LR IN
(I2S_MCLK)
SPDIF OUT
Buffer
Buffer
OP AMP
[MC33078] PWM MODULATOR/
POWER AMP
[NTP3000]
SIF IN
Broadcom
[BCM3553]
AUD_SPDIF
ANA L/R IN
ANA L/R
(MC33078)
ANA L/R
ANA L/R OUT
(CS5340)
BCM_MCLK
BCM_MCLK
I2S_CLK_IN I2S_DATA_IN I2S_LR_IN
RESET
RESET
I2S_CLK_OUT
I2S_DATA_OUT
I2S_LR_OUT
(NTP3000)
I2S_CLK_OUT/ DATA_OUT/ LRCH OUT
I2C SCL/SDA
OUT1A/B OUT2A/B
SPK R
SPK L
MNT_L/R OUT
HDMI Rx
Built in
Internal
I2S/SPDIF
Convert
HDMI_TMDS 0/1/2/CLK
TUNER (ATSC/NTSC )
I2C SCL/SDA
Buffer
Buffer SIF
IF_P
IF_N
AUD_LEFT/RIGHT P
HDMI_RX_DATA/CLK
ANA L/R OUT
BTSC
Decoder
MPEG2
Dolby
AUDIO
Processor
Signal path for AUDIO/ IF SPDIF OUT(coaxial)
BCM_MCLK
IF AGC
CVBS
FRONT END

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
BCM3553
AUDIO S/W(TEA6420)
NTP3000
NVRAM
4.7K‰
5.0V
I2C_Channel 0 I2C_Channel 1
ATSC/NTSC Tuner
I2C_Channel 2 I2C_Channel 3
I2C0_5V I2C1_5V
I2C2_2.5V
I2C2_3.3V I2C3_3.3V MTV416
4.7K‰
3.3VST
1K‰
3.3V
M62320
4.7K‰
5.0V
LM57(DS1621)
HDCP Key EEPROM
Address
0xC2 0x9A
0x74
0xA6
0x94
0x1C 0x54
0x??
0xD4
PDP MODULE
0x50
I2C MAP
CAT6431 Ready (only S/W mode)

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
Block Diagram Power Sequence and Flow Diagram
P_+19V
P_+19V IC501
NTP3000
(Sound IC)
BIAS
Speaker R/L
+12.0V
+12.0V
IC806
KA7809
IC500
TEA6420D
(Audio SW)
+9V
IC504
MC33078 (OP AMP)
Digital eye
LCD control B/D
IC901,902
KIA78R09F
(FAN REG)
FAN FAN
REG IC BIAS Side power

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
Block Diagram Power Sequence and Flow Diagram
ST_5V
ST_5V
REG IC BIAS Side power
Local key/IR power
IC202
ICL3232
RS-232C RX/TX
IC404
AZ1117H-3.3
IC406
AT24C16AN
(EEPROM)
+3.3VST_MICOM
IC407
MTV416GMF
( micom )
BIAS
HDMI CEC
Inv/RL/live-on
3.3V->5V
BIAS

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
Block Diagram Power Sequence and Flow Diagram
+6.0V
+6.0V
REG IC BIAS Side power
IC800
PQ05DZ1U
TUNER
+5V_TU
Power_CTL_3.3V
Tuner SIF
IC801
PQ05DZ1U
+5.0V
IC102
CAT24WC
(HDCP KEY EEPROM)
BIAS
BCM PCI 단
BCM SCL/SDA0~1
BCM DS-AGC,AUD_VDD
BIAS
IC200
TPS2052
(USB power CTL
analog SW)
IC403
AT24C512W
(EEPROM NVRAM)
Inv/RL/live-on
3.3V->5V
IC502
CS5340
(Audio ADC)
입력단자 HPD
IC601/602/603/701
AT24C02BN
(EEPROM EDID)
EDID EEPROM
W/P
IC600
3:1HDMI SW
SCL/SDA
IC700
74F08D
(RGB HV AND GATE)
IC808
FMS6400
(Tuner video buffer)
IC900
M62320FP
(FAN driver)
IC903
LM75CIMX-3
(FAN 온도센서)
IC804
AZ1117H-3.3
IC802
AZ1117H-3.3
D3.3V_BCM
IC101
Flash MEM 32M Reset SWBCM3553
IC401
74LVC14ADW
Reset 슈미트트리거
A3.3V_BCM
BCM3553
DAC/USB,AGC,HDMI
BOOT
STRAP
IC600
PICHDMI341
HDMI 3:1 SW
3.3V_TMDS_SW

Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BLOCK DIAGRAM
Block Diagram Power Sequence and Flow Diagram
+3.3V
+3.3V
REG IC BIAS Side power
Power_CTL_2.6V_1.2V
IC803
SC1566I5M
D2.6V_BCM
BCM3553 IC300,301,302,303
DDR IC 전원
IC200,201
TPS2052BD
(USB analog SW)
IC501
NTP3000
(sound IC)
IC502
CS5340
(Audio ADC)
IC503
TC74VHC04FT
(coxial SPDIF IC)
JK501
SPDIF power
IC407
MTV416GMF
+3.3V detect signal
BIAS
LVDS Tuner CTR
IC304
5C25955TR DDR Memory
DDR0_VTT DDR0_REF
BCM3553
A2.6V_BCM
IC805
SC4519STRT
DC-DC converter
BCM3553
D1.2V_BCM A1.2V_BCM
Power_CTL_2.6V_1.2V
IC807
AZ1117H-1.8
IC501
NTP3000
(sound IC)
+1.8V_NTP

Copyright ©LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
EXPLODED VIEW
600
300
306
570
560
120
601
603
602
301
302
202
203
240
204
590
501
502
520
205
206
250
208
400
900
901
101
580
207
201
200
303
304
A2