LG 50PB4D Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : PB73B

MODEL : 50PB4D 50PB4D-AA

website:http://biz.LGservice.com

Internal Use Only

- 2 -

Only for training and service purposes

CONTENTS

SAFETY PRECAUTIONS ....................................................................................3

SPECIFICATIONS ................................................................................................4

ADJUSTMENT INSTRUCTIONS .........................................................................6

TROUBLE SHOOTING GUIDE ..........................................................................11

BLOCK DIAGRAM ............................................................................................31

EXPLODED VIEW .............................................................................................40

EXPLODED VIEW PARTS LIST ........................................................................41

REPLACEMENT PARTS LIST...........................................................................42

SCHEMATIC DIAGRAM.........................................................................................

PRINTED CIRCUIT DIAGRAM ..............................................................................

- 3 -

Only for training and service purposes

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 isolation 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 circuitry 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 position, 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 1MΩ and 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 exposed 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 specified, 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

- 4 -

Only for training and service purposes

SPECIFICATIONS

NOTE : Specifications and others are subject to change without notice for improvement

V Application Range

This spec is applied to the 50” PLASMA TV used PB73B 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.

V Test Method

1) Performance : LGE TV test method followed.

2) Demanded other specification

Safety : CB specification EMC : CISPR 13 specification

V General Specification

1. Model General Specification

Chassis

PB73B 50PB4D-AA Australia LG

Fanless Model

Model Name Market Brand Remark

50PB4D-AA Safety : IEC60065,EN60950

EMC : CISPR 13 Class B

Australia

Model ApplianceMarket Remark

Broadcasting system

Available Channel

Tuner IF

Input Voltage

Screen Size

Aspect ratio

Module

Operating Environment

Storage Environment

PAL-B/G, DTV : DVB-T

1) VHF : 00 ~ 12

2) UHF : 20 ~ 75

3) CATV : 02 ~ 44

4) DTV : 06 ~12, 27 ~ 69

1) PAL : 38.90MHz(Picture),

34.40MHz(Sound)

2) DVB-T : 36.125MHz

100-240V~, 50Hz

50” Wide(1365x768)

16:9

50X4(LGE)

1) Temp : 0~40deg

2) Humidity : ~80%

1) Temp : -20~60deg

2) Humidity : ~85%

Mark : 240V, 50Hz

Model Specification Remark

- 5 -

Only for training and service purposes

2. Module Specification ( PDP42X4)

2-1. General Specification

2-2. Electro Optical Characteristic Specifications

White peak Brightness

White average brightness

Brightness uniformity

Color Coordinate WHITE X

Color coordinate uniformity

Contrast ratio

Color Temperature Medium

Cool

Warm

Color Distortion, DG

Color Distortion, DP

Color S/N, AM/FM

Color Killer Sensitivity

260

58.5(65)

-10

0.265

0.270

-0.010

2600:1

8,300

10000

5,500

43.0

-80

320

64.8(72)

0.278

0.279

average

3500:1

9,300

11,000

6,500

+10

0.289

0.294

0.010

10,300

12,000

7,500

10.0

No Item Remark

1% white window, HDMI input

Full white Pattern, 50Hz( 60Hz)

85 IRE Full white Pattern

Full white(216 gray)

1% white window, HDMI input

HDMI input,

85% Full white pattern

cd/m

deg

dBm

Min Typ Max Unit

Model Name

Number of Pixels

Pixel Pitch

Cell Pitch

Display Area

Outline Dimension

Pixel Type

Number of Gradations

Weight

Aspect Ratio

Peak Brightness

Contrast Ratio

Power Consumption

Expected Life-time

PDP50X4#1##(50X4 Clear Model)

1366(H) x 768(V) (1pixel=3 RGB cells)

810um(H) x 810um(V)

270um(H) x 810um(V) (Green Cell basis)

1106.5 (H) x 622.1(V) ± 0.5mm

1190(H) x 703(V) x 52(D) ±1mm

RGB Closed(Well) type

(R)1,024 x (G)1,024 x (B) 1,024 colors

21.0 ± 0.5 Kg(Net 1EA)

16:9

Typical 450cd/m

(1/100 White Window pattern at center)

Average 340:1 (In a bright room with 100Lux at center)

Typical 15,000:1 (In a dark room 1/100 White Window pattern at center)

Max. 400W (Full-White)

Warranty life time 60,000 Houres with contonuous operation

GENERAL SPECIFICATIONS

- 6 -

Only for training and service purposes

ADJUSTMENT INSTRUCTIONS

1. Application Object

These instructions are applied to all of the 50” PLASMA TV, PB73B Chassis

2. Notes

(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 220V~,

60Hz when adjusting. (5) The receiver must be operational for about 15 minutes

prior to the adjustments.

O Preliminary action is 100% FULL WHITE PATTERN must

be operated automatically.(Ez-Adjust 10. Test Pattern)

O Test for afterimage discharge detection

1) How to Adj R/C pressing Power key.

Press the ADJ KEY of the adjusting R/C to enter into the

Ez-Adjust, use the CH +/- key to select ‘10. WHITE PATTERN’, and press the confirmation (

A) key. Then,

‘100% FULL WHITE PATTERN’ is displayed

[ Set is activated HEAT-RUN without signal generator in

this mode.

3. EDID(The Extended Display

Identification Data)/DDC (Display Data Channel) Download

This has been established by VESA and is the function created to “Plug and Play” by making the computer reconfigure user environment through communication with the monitor automatically without having the user set commands directly to the PC or the monitor so that the user can use it immediately. * When writing EDID, use DDC2B protocol.

3-1. HDMI EDID Data Input

(1) Required Test Equipment

- PC, Jig for adjusting DDC. (PC serial to D-sub Connection equipment)

- S/W for writing DDC (EDID data write & read)

- D-Sub cable

- Jig for HDMI Cable connection

(2)

Adjustment preparation & device configuration

- Configure as Fig. 7, and turn on the PC

- Turn on the JIG.

- Run the DDC recording S/W (EDID Data Write & Read). (Execute in DOS mode)

3-2. EDID DATA for PB75A

A EDID for HDMI-1 (DDC (Display Data Channel) Data)

EDID table =

A EDID for HDMI-2 (DDC (Display Data Channel) Data)

EDID table =

If you turn on a still screen more than 20 minutes (Especially Digital pattern, Cross Hatch Pattern), an afterimage may occur in the black level part of the screen.

VSC

B/D

JIG cable(CPLD D/L)

<Fig.1> Connection Diagram of CPLD Download

012 34 5 6 7 8 9 ABCD EF

0 00FFFFFFFFFFFF001E6D01 000101 0101 10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CE 00 31 40 45 40 61 40 81 80 A9 40 30 D1 C0 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 AA

012 34 5 6 7 8 9 ABCD EF

002031EF14E2022101F01020304051293 10 14 07 16 23 15 07 50 66 03 0C 00 10 00 80 01 1D 20 00 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 30 01 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 40 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 50 42 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 60 C4 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 70 25 80 C4 8E 21 00 00 9E 00 00 00 00 00 00 00 58

012 34 5 6 7 8 9 ABCD EF

002031EF14E2022101F01020304051293 10 14 07 16 23 15 07 50 66 03 0C 00 20 00 80 01 1D 20 00 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 30 01 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 40 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 50 42 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 60 C4 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 70 25 80 C4 8E 21 00 00 9E 00 00 00 00 00 00 00 48

- 7 -

Only for training and service purposes

A EDID for HDMI-3 (DDC (Display Data Channel) Data)

EDID table =

A EDID for RGB (DDC (Display Data Channel) Data)

EDID table =

4. POWER PCB Assy Voltage Adjustments

(Va, Vs Voltage adjustments)

4-1. Test Equipment : D.M.M. 1EA

4-2.Connection Diagram for Measuring

: refer to Fig.2

4-3. 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 P805, connect

- terminal to GND pin of P805.

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 P805, connect – terminal to GND pin of P805.

2) After turning VR951, voltage of D.M.M adjustment as same as Va voltage which on label of panel right/top. (Deviation; ±0.5V)

5. MST3361M-Set Adjustment

5-1. Synopsis

MST3361M-Set adjustment to set the black level and the Gain of optimum with an automatic movement from the analog => digital converter.

5-2. Test Equipment

Service R/C, 801GF(802B,802F,802R), MSPG-925FA,MSPG-1025D Pattern Generator. ( 480i, 1080p Horizontal 60Hz Color Bar Pattern output will be possible and the output level will accurately have to be revised with 0.7±0.1Vp-p) * It should be checked because the above pattern may be different according to the model and the pattern of the used equipment.

5-3. Adjustment method

(1) Component1 adjustment method.

1) Select Component1 as the input with Color Bar Pattern in 480i 60Hz mode and select ‘Component1’ on screen.

2) 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 ‘1. ADC 480i Comp1’. Pressing the Vol+ Key to adjust the component1.

3) When the adjustment is over, 'ADC Component1 Success’ is displayed.

4) When the adjustment is not normally completed, a message saying ‘ADC Component1 480i Fail’ is displayed. When the component is not connected, a message saying ‘Component1 Not Connected’, when the input format is not 480i, a message saying ‘Not Valid Format’ and when the input signal is not coming out, a message saying ‘Check Signal Status’ is displayed for 1 second. (MSPG-925FA : -> model : 209, pattern : 65)

012 34 5 6 7 8 9 ABCD EF

0 00FFFFFFFFFFFF001E6D010001010101 10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23 20 09 48 4C AF CE 00 31 40 45 40 61 40 81 80 A9 40 30 D1 C0 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 00

012 34 5 6 7 8 9 ABCD EF

002031EF14E2022101F01020304051293 10 14 07 16 23 15 07 50 66 03 0C 00 30 00 80 01 1D 20 00 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 30 01 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 40 00 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 50 42 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 60 C4 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 70 25 80 C4 8E 21 00 00 9E 00 00 00 00 00 00 00 38

012 34 5 6 7 8 9 ABCD EF

0 00FFFFFFFFFFFF001E6D010001010101 10 0E 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 D1 C0 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 59

012 34 5 6 7 8 9 ABCD EF

0 020304000E1F0080 51 001E3040803700 10 C4 8E 21 00 00 1C 00 00 00 00 00 00 00 00 00 00 20 00 00 00 00 00 00 00 00 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 25

<Fig.3> Adjust Pattern : 480i, 1080p 60Hz Color Bar Pattern

(Fig.2) Connection diagram of power adjustment for measuring

50” FHD : EAY38800401

- 8 -

Only for training and service purposes

(2) Component1, RGB adjustment method.

1) Select Component1, RGB as the input with Color Bar Pattern in 1080p 60Hz mode and select ‘Component1’ as input mode.

2) 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 ‘2. ADC 480i Comp1/RGB’. Pressing the Vol+ Key to adjust the component1.

3) When the adjustment is normally completed, the message ‘ADC Component1 Success’ is displayed, or if not, the message ‘ADC Component1 1080P Fail’ is displayed. After adjusting the Component1 is completed, it is automatically switched to the RGB-DTV mode, and the RGB adjustment starts. If adjusting is normally completed, the message ‘ADC RGB 1080P Success’ is displayed.

4) When the adjustment is not normally completed, check the pattern or the adjustment condition, and then adjust it again. The error message is same to (4)) of (1)

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY. (MSPG-925FA : -> model : 225, pattern : 65)

6. Video Set Adjustment

It is the adjustment to reduce the color difference of the RF and the video signal, which adjusts Analog RF, AV-PAL, and AV-NTSC.

6-1. Adjustment method

(1) Analog RF and AV-PAL adjustment method.

1) Connect the Video Signal Generator (Master) to the AV input of the TV via the AV output. At this time, when entering the input pattern with Model : 202(PAL) and Pattern : 33(100% color Bar), the following screen is displayed.

* It should be checked because the above pattern may be different according to the model and the pattern of the used equipment.

2) After entering the in-house signal, when it is checked that the signal is received, press the ADJ KEY of the adjusting R/C to enter into ‘EZ-ADJUST’ Select ‘3. Adjust RF and AV_PAL’ and press the right arrow key (

G) to enter into the adjustment mode.

3) When it enters into the adjustment mode, the screen is automatically switched to TV 3CH and the following window is displayed.

4) When the automatic adjustment starts, the main screen is adjusted, and if adjusting is completed, the message ‘RF-PAL Configuration Success’ is displayed. If adjusting is failed, the message ‘RF-PAL Configuration Fail’ is displayed.

5) When the automatic adjustment of the RF signal is completed, it is automatically switched to AV1 Mode and the automatic adjustment is performed to the AVPAL. When the automatic adjustment is completed, the message ‘AV-PAL Configuration Success’ is displayed. If the adjustment is failed, the message ‘AV-PAL Configuration Fail’ is displayed.

(2) AV-NTSC adjustment method.

1) Connect the Video Signal Generator (Master) to the AV input of the TV via the AV output. At this time, when entering the input pattern with Model : 201(NTSC) and Pattern : 33(100% color Bar), the following screen is displayed.

* It should be checked because the above pattern may be different according to the model and the pattern of the used equipment.

2) Press the ADJ KEY of the adjusting R/C to enter into ‘EZ-ADJUST’ Select ‘4. Adjust AV_NTSC’ and press the right arrow key (

G) to enter into the adjustment mode.

3) When the automatic adjustment is completed, the message ‘AV-NTSC Configuration Success’ is displayed. If the adjustment is failed, the message ‘AVNTSC Configuration Fail’ is displayed.

<Fig.4> Model : 202(PAL), Pattern : 33(100% Color Bar)

<Fig.5> Model : 201(NTSC), Pattern : 33(100% Color Bar)

- 9 -

Only for training and service purposes

7. Adjustment of White Balance

7-1. Required Equipment

1) Color Analyzer : CA-100(CH 10)

2) When adjusting the PLASMA color temperature, the No. 10 channel with the matrix compensated (White, Red, Green and Blue compensated) should be used for the CS-1000 as Color analyzer (CA-100), which should be adjusted based on the white balance adjustment coordinate as described below.

2) Automatic adjuster (necessary for the automatic adjustment, possible to communicate via the RS-232C)

3) Video Signal Generator MSPG-925F 720p, 216Gray(Model : 217, Pattern : 78)

7-2 Measuring device connection diagram

(for automatic adjustment)

7-3 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 7-3 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 PB75A chassis from the adjuster.

Caution) For automatic adjustment, RS-232C Command and

Chassis are commonly applied

- Wb 00 00 Start automatic adjustment of white balance

- Wb 00 10 Start gain adjustment (Internal pattern)

- Ja 00 ff Adjustment data

- Jb 00 c0

- …

- Wb 00 1f End gain adjustment * Adjust offset as necessary (wb 00 20(Start), wb 00 2f(End))

- Wb 00 ff End automatic adjustment of white balance (Internal pattern disappears)

Caution) Adjustment map

* White Balance adjustment (For automatic adjustment)

- Execute Power Only Key of the adjustment R/C to execute

automatic adjustment. Set the Baud Rate to 115200.

- Always start adjustment with “wb 00 00” and end adjustment with “wb 00 ff”

- Adjust the offset if necessary.

Color Analyer

RS-232C

Full White Pattern (Inner pattern)

<Fig. 6> Connection diagram for internal pattern

<Fig. 7> Connection diagram for HDMI input

216Gray White Pattern (HDMI Pattern)

Color Analyer

MSPG-925FSMSPG-925FS Video Signal Generatorideo Signal Generator Model : 217Model : 217 Pattern : 78Pattern : 78

RS-232CRS-232C Baud Rate : 1Baud Rate : 11520015200

Remark

RS-232C Command

[CMD ID DATA]

wb wb wb wb wb wb

00 00 00 00 00 00

00 10

Start white balance adjustment Start Gain adjustment(Internal white pattern) End Gain adjustment Start Offset adjustment (Internal white pattern) End Offset adjustment End white Balance adjustment (Internal pattern disappear)

R Gain

G Gain

B Gain

R Cut

G Cut

B Cut

Cool

Mid

RS-232C COMMAND

[CMD ID DATA]

CENTER

(DEFAULT)

192

127

Warm

Min Max

192

Cool

192

Mid

192

Warm

- 10 -

Only for training and service purposes

7-4. Adjustment of White Balance

(For manual adjustment)

- Required Equipment : When adjusting the PLASMA color temperature, the No. 10 channel with the matrix compensated (White, Red, Green and Blue compensated) should be used for the CS-1000 as Color analyzer (CA-100), which should be adjusted based on the white balance adjustment coordinate as described below.

(1) Enter to ‘EZ-ADJUST’ by pressing ADJ key of R/C. (2) HEAT RUN at least 30 minutes by pressing the ‘11. TEST

Pattern’ on the Service Remote Control and adjust.

(3) Set CA-100 in Zero Calibration, when adjust PDP module

make it contacting completely in the surface.

(4) Select ‘6. White-Balance’ of ‘Ez - Adjust’ by pressing the

ADJ KEY on the Service R/C. Then enter adjustment mode by pressing the Right KEY (

). This time white pattern is

displayed. (When press

key, the screen enters to Full

White internal pattern.)

(5) The adjustment completes in three color temperatures as

Cool, Medium, and Warm.

(6) When R GAIN is fixed at 192:

keep G GAIN and B GAIN less than 192 and find proper values for adjustment.

When G GAIN is fixed at 192:

keep R GAIN and B GAIN less than 192 and find proper values for adjustment.

When B GAIN is fixed at 192:

keep R GAIN and G GAIN less than 192 and find proper

values for adjustment. (7) Adjust using Volume +/- KEY. (8) When the adjustment is completed, press the OK (

A KEY)

button to move to the Ez –Adjust screen. Press the ADJ KEY to exit the adjustment mode.

[Ref.] White Balance Adjustment Pixel and Color Temperature

(1) Standard white balance standard white balance coordinate

when using CS-1000 device:

(2) Directed color coordinate when using CA-100 CH 10

Brightness: Full white 216gray

(3) Directed color coordinate when using CA-210 CH 10

8. Check the adjustment of the plant shipping mode

Color temperature Color analyzer Color coordinate

COOL CA-100 0.276±0.002 0.283±0.002

MEDIUM CA-100 0.285±0.002 0.293±0.002

WARM CA-100 0.313±0.002 0.329±0.002

Color temperature Color analyzer Color coordinate

COOL CA-210 0.276±0.002 0.283±0.002

MEDIUM CA-210 0.285±0.002 0.293±0.002

WARM CA-210 0.313±0.002 0.329±0.002

Color temperature

Measuring instrument

Color coordinate

COOL 11000K,

∆

uv=0.000 0.276 0.283

MEDIUM 9300K,

∆

uv=0.000 0.285 0.293

WARM 6500K,

∆

uv=0.000 0.313 0.329

Digital

Off

16:9

Dynamic

Cool

Off

Auto

Standard

Off

16:9

Off

Normal

Off

C0, C5, C6, S11,

C20, C35, C52, C68

C43

Item ConditionNo

Remark

Input Mode

Volume Level

Mute

Aspect Ratio

SET ID

Picture PSM

Color Temp.

Advanced Cinema

Black level

Sound SSM

AVL

Balance

TV Speaker

Time Auto Clock

Manual Clock

Off Timer / On Timer

Sleep Timer / Auto Off

Option Sub title

Child Lock

ARC

Demo

ISM Method

Low Power

Channel Memory Analog

Digital

- 11 -

Only for training and service purposes

ATI

X260

ATI

X260

SIF

NTP3000

I2S

SPDIF

I2S

CVBS(NT Main)

DDR2

64MBx2

DDR2

64MBx2

Flex Bus

RGB 30bit

TPA

Analog

Front

End

USB 1.1

I2C Port0

I2C CH1

I2C CH2

I2C CH3

MTV415

Micom

MTV415

Micom

USB (upgrade ready!!)

Dead IC when Standby

Video

Scaler

Video

Scaler

1 or 2

Alive IC when Standby

Audio

Video

AV2 / L/R

MNT Out L/R

COMP1 L/R

COMP2 L/R

RGB L/R

TP_IN1

AV1

AV2

AV1, Y/C1

AV2, Y/C2

Flash

(NOR 32MB)

Flash

(NOR 32MB)

Latch

Latch x2

24C512

1. Video (1)NO OSD <FHD>

TROUBLE SHOOTING GUIDE

- 12 -

Only for training and service purposes

Check L729

Check

Power connector

Replace Power board

Check THC63LVD1023 (IC601)

#9(DE), #15(Clk), #7(Hsync),

#8(Vsync)

Check X260 (IC101)

Check P600 #47(DISP_EN),

#33(TXAC-) , #32(TXAC+) ,

#17(TXBC-) , #16(TXBC+)

Check THC63LVD1023 (IC601)

Check LVDS Cable

Check PDP/LCD Module

Control board

1 : _Check the L729 HIGH.

_Check Power connector.

2 : _Check the THC63LVD1023 (IC601)

input signal

#(Clk) :

74.25MHz

3 : _Check the P600 input signal

#47(DISP_EN) :

#33 (TXAC-) :

74.25MHz

3.3V

GND

#32 (TXAC+) :

4 : _Check the LVDS Cable

5 : _Check the PDP Module control board

#17 (TXBC-) :

#16 (TXBC+) :

74.25MHz

1. Video (2)NO OSD <FHD>

- 13 -

Only for training and service purposes

EXT

1/2

X260

TP A

Comp1/2

RGB

CVBS

TP C

TP B / 656

AT/NT/

TUNER

MST

3361

HS,VS

DVI

HS,VS

YCbCr2

YCbCr or RGB

FRC9445H

RGB

CVBS

YCbCr1

DVO

Y/C1, Y/C2

AV1/2

HDMI

1/2/3

TMDS341A

1. Video (3)Video Path

- 14 -

Only for training and service purposes

Check Antenna Cable

Check Tuner

5V, Video out

Check X260 inputs

M_TU_CVBS(C2117)

Check CVBS Video Path

1 : _Check Tuners Vcc and Video out

1. Video (4)RF Mode

- 15 -

Only for training and service purposes

EXT

1/2

X260

TP A

Comp1/2

RGB

CVBS

TP C

TP B / 656

AT/NT/

TUNER

MST

3361

HS,VS

DVI

HS,VS

YCbCr2

YCbCr or RGB

FRC9445H

RGB

CVBS

YCbCr1

DVO

Y/C1, Y/C2

AV1/2

HDMI

1/2/3

TMDS341A

1. Video (5) DTV/CAD TV

- 16 -

Only for training and service purposes

Check Antenna Cable

Check Tuner(TU600), 5V, IF out

3._ Check X260 Input (CLK, SOP, Valid, Error, Data)

Check X260 INPUT CLK, SOP,

Valid, Error, Data

1. Video (6) DTV

- 17 -

Only for training and service purposes

EXT

1/2

X260

TP A

Comp1/2

RGB

CVBS

TP C

TP B / 656

AT/NT/

TUNER

MST

3367

HS,VS

DVI

HS,VS

YCbCr2

YCbCr or RGB

FRC9445H

RGB

CVBS

YCbCr1

DVO

Y/C1, Y/C2

AV1/2

HDMI

1/2/3

TMDS341A

1. Video (7) Component/RGB

- 18 -

Only for training and service purposes

5 : _Check the MST3361(IC402) Output Signals

(Vsync) :

(DE) :

(Clk) :

(Hsync)

59.94Hz

Frequency : Different according to

format !!

(Data) :

4 : _Check MST3361(IC402) Power pins, Input Signals, Signal Shape is Same (above)

6 : _Check X260 (IC101) Inputs

_Signal shape is same (above)

Check Signal format

(supported format?)

Check STMAV335(IC403) Power

Pins, Comp1(#2,#5,#11),

Comp2(#3,#6,#10), RGB(#9,#4,#7)

RGB_V,H(R400,R401)

Check STMAV335(IC403) outputs

#14(MUX_OUT_Y),

#13(MUX_OUT_Pb),

#8(MUX_OUT_Pr)

Check MST3361(IC402)

OSC, Power pins,#44( Y_in),

#41(Cb_in),#46(Cr_in)

#37(H),#38(V)

Check MST3361(IC402) Outputs V-

out (#99) , H-out (#98) , Clock (#96) ,

Data (30Bit) , DE(#97)

Check X260 (IC101) Inputs

MST3361_HS(#T6) ,

MST3361_VS(#T5) , Clock (#P3) ,

Data (30Bit) , DE(#U6)

3 : Check STMAV335(IC403) outputs

Signal shape is same (above)

1. Check Signal format (ref. owenr’s manual)

2. Check STMAV335(IC403) Power Input Signal

1. Video (8) Component/RGB

- 19 -

Only for training and service purposes

EXT

1/2

X260

TP A

Comp1/2

RGB

HDMI

1/2/3

CVBS

TP C

TP B / 656

AT/NT/

TUNER

MST

3367

HS,VS

DVI

HS,VS

YCbCr2

YCbCr or RGB

FRC9445H

RGB

CVBS

YCbCr1

DVO

Y/C1, Y/C2

AV1/2

TMDS341A

1. Video (9) HDMI/DVI

+ 42 hidden pages

LG 50PB4D Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual