LG 42PJ350-AB Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : PA01A

MODEL : 42PJ350 42PJ350-AB

North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com

Internal Use Only

Printed in Korea

P/NO : MFL62882004(1001-REV00)

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Only for training and service purposes

CONTENTS

CONTENTS ............................................................................................................................... 2

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

SPECIFICATION.........................................................................................................................4

ADJUSTMENT INSTRUCTION ..................................................................................................6

TROUBLESHOOTING GUIDE..................................................................................................11

BLOCK DIAGRAM ...................................................................................................................22

EXPLODED VIEW ...................................................................................................................23

SVC. SHEET ................................................................................................................................

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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 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.

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

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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 PDP TV used PA01A 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 Test Method

No Item Specification Remark

1. Broadcasting system PAL-B/B, DTV : DVB-T

2. Available Channel 1)DTV

-.VHF : 6 ~ 12

-.UHF : 27 ~ 69

2) ATV

-.VHF : 0 ~ 20

-.UHD : 21 ~ 75

3. Tuner IF 1) PAL : 38.90MHz(Picture),

34.40MHz(Sound)

2) DVB-T : 36.125MHz

4. Input Voltage AC 100 ~ 240 V, 50/60Hz Mark : 240V, 50Hz

5. Screen Size 42 inch XGA(1024 x 768)

50 inch Wide(1365 x 768)

50 inch Wide(1920 × 1080) 60 inch Wide(1920 × 1080)

6. Aspect Ratio 16:9

7. Module 42/50T1, 50/60R1

8. Operating Environment 1) Temp : 0 ~ 40 deg

2) Humidity : ~ 80 %

9. Storage Environment 1) Temp : -20 ~ 60 deg

2) Humidity : ~ 85 %

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Only for training and service purposes

V Chroma & Brightness

(1) HD Module (42T1 Module, 38% Glass Filter )

* Warning : When measuring following test items, Dynamic Colour & Dynamic Contrast should be turned off.

No Item Min Typ Max Unit Remark

1. White peak brightness 315 - cd/m

(*) Peak Brightness Mode

-1/100 white Window pattern

(Typically 1% Window size)

-100IRE (255Gray)

-Picture: Vivid (Medium)

-Input: HDMI-PC(1920*1080 60Hz)

*Peak Brightness Condition may Slightly

different between sets.

148 161 -25/100 white Window pattern

2. White average brightness 46 50 cd/m

- 100% Window White Pattern

- 100IRE(255Gray)

- Picture: Vivid(Medium )

3. Brightness uniformity -10 0 +10 %

- 85IRE(216Gray) 100% Window White Pattern

- Picture: Vivid(Medium)

4. Color White X 0.270 0.285 0.300 - White : 85IRE(216Gray) 100% Window

Coordinate Y 0.283 0.293 0.303 White Pattern

Red X 0.635 0.640 - - R/G/B : 100IRE(255Gray) 100% Window

Y 0.318 0.333 0.345 White Pattern

Green X 0.242 0.300 0.305 - Picture: Vivid(Medium )

Y 0.595 0.600 - - 100% Window

Blue X - 0.150 0.158

Y - 0.065 0.075

5. Color coordinate uniformity -0.01 Average +0.01 - 85IRE 100% Window White Pattern

- Picture: Vivid(Medium)

6. Contrast ratio at dark room 100k: 1 1,000k: 1 -1/100 white window pattern(Peak mode)

-100IRE(255Gray)

-Picture: Vivid(Medium)

-Input: HDMI-PC (1920*1080 60Hz)

7. Color Cool X 0.261 0.276 0.291 - 85IRE 100% Window White Pattern

Temperature Y 0.268 0.283 0.298 Warm : ColorGamut => WIDE

Medium X 0.270 0.285 0.300 Cool : Color temperature C30

Y 0.278 0.293 0.308 Meduum : Color temperature 0

Warm X 0.298 0.313 0.328 Warm : Color temperature W30

Y 0.314 0.329 0.344

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Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Range

This spec. sheet is applied to all of the PA01A chassis manufactured at LG TV Plant all over the world.

2. Designation

Caution: The module keeping condition

1. The module keeping condition: The normal temperature condition(more than 15°C)

-> Immediately the line supply.

2. The module keeping condition: 0°C

-> The module must be kept for more than 2 hours at the normal temperature.

3. The module keeping condition: -20°C

-> The module must be kept for more than 3 hours at the normal temperature.

4. The case of Gu-mi factory at the winter season.

-> The module must be kept for more than 5 minutes at the heating zone(40°C~45°C).

(1) The adjustment is according to the order which is

designated and which must be followed, according to the plan which can be changed only on agreeing.

(2) If there is no specific designation, the adjustment must be

performed in the circumstance of 25 ±5∞C of temperature and 65±10% of relative humidity.

(3) The input voltage of the set must keep 100~240V,

50/60Hz. (4) Input signal Unit: Product Specification Standard. (5) The set must be operated for about 5 minutes prior to the

adjustment. .

* After turning on RGB Full Window pattern in HEAT-RUN

Mode, the receiver must be operated.

* Enter into HEAT-RUN MODE

1) Press the ‘POWER ON’ button on R/C for adjustment.

2) Press the ‘ADJ’ button on R/C and enter EZ ADJUST

- Select "7. Test Pattern" by using

F/G(CH +/-) and

press ENTER(

- Select "White" by using

F/G (VOL +/-) and press

ENTER(

O Set heat run should be activated without a signal generator.

O Single color patterns (RED / BLUE / GREEN) of HEAT RUN

MODE are used to check a plasma panel.

O Caution: If you turn on a still screen more than 20 minutes

(Especially digital pattern, cross hatch pattern), an after image may be made in the black level part of the screen.

Caution

- Use 'power on' button of a service R/C to power on TV set.

- Do not connect any external input cable if there is no any specifics.

3. Update S/W using auto download

through the USB.

Caution: S/W version of USB file (xxx.epk) must be bigger than

one which is downloaded previously.

1. Insert the USB stick to the USB socket

2. A downloaded file in USB stick will be detected automatically.

3. If S/W version of USB file (xxx.epk) is bigger than one which is downloaded previously, the message, “Copying files from memory”, will appear.

4. If an update procedure was completed, TV set will be turned off and on automatically.

5. If TV set is turned on, check an updated version.

* If a downloaded version is more bigger than one of which

TV set had, TV set can lost channel data. In this case, you have to scan channels again.

4. After downloading S/W, adjust TOOL OPTION.

(1) Push "IN-START" button on a service R/C. (2) Select "Tool Option 1" and Push “OK” button. (3) Put the number of a below table in order of a suffix of the

“Tool Option(X)”.

(Each model has a different number.)

Model

Tool Option1 Tool Option2 Tool Option3 Tool Option4

42PJ350-AB 25024 2632 51404 4384

42PJ650-AA 24896 2632 51408 4384

50PJ350-AB 37312 2632 51404 4384

50PJ650-AA 37184 2632 51408 4384

50PK550-AA 36992 2632 51404 4384

60PK550-AA 49280 2632 51404 4384

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Only for training and service purposes

5. ADC Calibration Procedure

(1) Input the component (480i/Horizontal Color Bar) signal to a

TV set.

1) Input Signal Timing : Component 480i (Other external connection is unnecessary except the

component before executing ADC calibration.)

2) Input Signal Pattern

@ MODEL: 209 in Pattern Generator(480i Mode) @ PATTERN : 65 in Pattern Generator(MSPG-925

SERISE)

(2) Push “ADJ” button on a service R/C. (3) Enter internal ADC mode by selecting ‘5. ADC Calibration’. (4) If you select ‘Start’ on a dialog box of the screen, ADC

calibration will be begun.

Caution: Don’t connect any external input cable except the

component input(480i/Horizontal_Color_Bar) to adjust ADC calibration

O Auto ADC Calibration Map(RS-232C)

# Adjust Sequence

- aa 00 00 [Enter Adjust Mode]

- xb 00 40 [Component1 Input (480i)]

- ad 00 10 [Adjust 480i Comp1]

- xb 00 60 [RGB Input (1024*768)]

- ad 00 10 [Adjust 1024*768 RGB]

- aa 00 90 End Adjust mode

6. EDID Download Procedure

(1) Push “ADJ” button on a service R/C. (2) Enter EDID auto download mode by selecting ‘8. EDID

D/L’.

(3) If you select ‘Start’ on a dialog box of the screen, EDID

download will be begun automatically.

(4) Press ‘EXIT’ button on a service R/C.

(5) EDID Data

1) HDMI (HD Models, 256 bytes)

2) RGB (HD Models, 128 bytes)

O EDID Data detailing (ⓐ, ⓑ, ⓒ, ⓓ, ⓔ, ⓕ)

NO Item

CMD1

AA00

CMD2 Data0

Enter

Adjust MODE

Adjust

‘Mode In’

When transfer the ‘Made

In’, Carry the command.

Automatically adjustment

ADC

Adjust

ADC Adjust

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Only for training and service purposes

ⓐ Product ID

ⓑ Serial No

=> Controlled on production line

=> Controlled on production line:

ⓓ Model Name

ⓔ Checksum

=> Changeable by total EDID data

ⓕ HDMI Port No.

O Auto EDID Download Map(RS-232C)

7. POWER Supply Unit PCB Ass’y Va/Vs Voltage Adjustment

Caution: Both Vs and Va voltage adjustment are necessary.

7-1. Va/Vs Adjustment Procedure

(1) Connect positive(+) terminal of DMM to Vs/Va pin, connect

negative(-) terminal to GND.

(2) Turning ‘Vs/Va Adjust’ and adjust Vs/Va voltages to a

value which is written on a right/top label of a module. (deviation ; ±0.5V)

Caution

- Each Power Supply Unit PCB assembly must be checked by check JIG set. (Because power PCB Ass’y damages to PDP Module, especially be careful)

- Set up “RF mode(noise)” before a voltage adjustment.

- Test equipment: DMM 1EA

8. White Balance Adjustment

Caution: Press the POWER ON KEY on R/C before W/B adjustment.

O Test Equipment

Color Analyzer (CS-1000, CA-100+(CH.10), CA-210(CH.10))

O Please adjust CA-100+ / CA-210 by CS-1000 before

measuring

You should use Channel 10 which is Matrix compensated (White, Red, Green, Blue revised) by CS-1000 and adjust

in accordance with White balance adjustment coordinate.

8-1. Color Temperature Standards According

to CSM and Module(TBD)

MODEL

EDID MODEL

PRODUCT_ID FUNCTION

ALL Model LG DTV 0001(0x01, 0x00) Analog

ALL Model LG DTV 0001(0x01, 0x00) Digital

FHD HD

HDMI1 0xE2 0xB4 0xAF 0xE2

HDMI2 0xE2 0xA4 0xAF 0xE2

HDMI3 0xE2 0x94 0xAF 0xE2

HDMI4 - - - -

RGB 0x62 0x2F

NO Item

CMD1

AA00

1000

CMD2 Data0

Enter

download

MODE

Download

‘Mode In’

When transfer the ‘Made

In’, Carry the command.

Automatically download

(The use of a internal

Data)

Download

EDID data and

Model option

download

6500KWarm

9300KMedium

11000KCool

PLASMACSM

8-2. Change Target Luminance and Range

of the Auto Adjustment W/B Equipment

8-3. White Balance Adjustment Coordinate

and Color Temperature

8-4. White Balance Adjustment Coordinate

and Color Temperature

[ PC (for communication through RS-232C) ? UART Baud

rate : 115200 bps

8-5. Automatic W/B Adjustment

(1) Internal PATTERN should be used when W/B is adjusted.

Connect to auto controller like below.

(2) Start White-Balance adjustment, then the full white window

pattern will appear on the screen.

(3) Adjust in the place where the influx of light like floodlight

around is blocked.

(illumination is less than 10ux).

(4) Measure and adjust after sticking the Color Analyzer (CA-

100+, CA210 ) to the side of the module.

O Auto W/B Adjustment Map(RS-232C)

RS-232C COMMAND [ CMD ID DATA ]

Wb 00 00 White Balance Start Wb 00 FF White Balance End

8-6. Manual W/B Adjustment

(1) Execute the zero calibration of CA-100+ / CA-210. (2) Press the ‘ADJ’ button on a service R/C and enter EZ

ASJUST by selecting ‘6. White Balance’. (3) Then, 216 gray pattern will appear on the screen. (4) Change the R/G/B-Gain as passing in 3 color coordinates

and temperatures, COOL, MEDIUM and WARM.

< Temperature: COOL >

- R-Cut / G-Cut / B-Cut is set to 64

- Control R-Gain and G-Gain.

- Each gain is limited to 192

< Temperature: MEDIUM >

- R-Cut / G-Cut / B-Cut is set to 64

- Control R-Gain and G-Gain.

- Each gain is limited to 192

< Temperature: WARM >

- R-Cut / G-Cut / B-Cut is set to 64

- Control G-Gain and B-Gain.

- Each gain is limited to 192

(5) Press ‘EXIT’ button on a service R/C

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Only for training and service purposes

20Range

50Target luminance

20Range

50Target luminance

128646464B Cut

128646464G Cut

128646464R Cut

50H3 60H3

25519219219200jfJcjiB Gain

25519219219200jeJbjhG Gain

25519219219200jdJajgR Gain

WarmMedCoolWarmMedCool

MAX

CENTER

(DEFAULT)

Min

RS-232C COMMAND

[CMD ID DATA]

<Notice> Module Heat-Run Condition for W/B

1. The adjustment must be performed in the circumstance of 25±5°C of temperature and 65±10% of relative humidity if there is no any specifics.

2. Before an W/B adjustment, the module which will be used should be placed in the circumstance of 15°C~25°C for above 2 hours.

3. If a module was placed in the circumstance of below 15°C, it should be placed in the circumstance of 15°C~25°C for above 2 hours or be run for above 5 minutes in an aging environment of 60°C.

4. Before an W/B adjustment, TV set should be run for 5 minutes at least.

9. Serial Number Download

9-1. Download Procedure

(1) Press “Power on” button of a service R/C.(Baud rate :

115200 bps) (2) Connect RS232-C Signal Cable. (3) Write Serial number through RS-232C. (4) Check the serial number at the Diagnostics of ‘SETUP’

menu. (Refer to below).

Caution : Don’t download HDMI/RGB EEPROM to write a model

name. Model name dois unnecessary because this model use ‘Tool Option’ to call a model name.

9-2. Signal TABLE

CMD : A0h LENGTH : 85~94h (1~16 bytes) ADH : EEPROM Sub Address high (00~1F) ADL : EEPROM Sub Address low (00~FF) Data : Write data CS : CMD + LENGTH + ADH + ADL + Data_1 + ... +

Data_n

Delay : 20ms

9-3. Command Set

[Description]

FOS Default write : <7mode data> write Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, Phase Data write : Model Name and Serial Number write in EEPROM,.

10. Check Information

(Serial No. & Model name)

(1) Push the menu button in DTV mode. (2) Select the SETUP -> Diagnostics -> To set (3) Check the Serial Numbe

11. SET factoring condition

(1) This Adjustment result is set through factory shipment

mode.

(2) Push the ‘IN-STOP’ button on a service R/C before the

factory shipment and power button mush be pushed.

Caution: If ‘IN-STOP’ button is pushed, preset CH map will be

lost.

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Only for training and service purposes

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