LG 42PN450D-ZA Schematic

5 (2)

Internal Use Only

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PLASMA TV

SERVICE MANUAL

CHASSIS : PD31B

MODEL : 42PN450D 42PN450D-ZA

CAUTION

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

Printed in KoreaP/NO : MFL67682001 (1211-REV00)

CONTENTS

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

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

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

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

BLOCK DIAGRAM .................................................................................. 14

EXPLODED VIEW .................................................................................. 15

SCHEMATIC CIRCUIT DIAGRAM ..............................................................

Only for training and service purposes

- 2 -

To Instrument's exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

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 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 sh orts of the cir cui try that may be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock.

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 1 M 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.

Ω and 5.2 MΩ.

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 1.5 K / 10 watt resistor in parallel with a 0.15 uF 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

0.5 mA. 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

Only for training and service purposes

- 3 -

SPECIFICATION

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

1. Application range

This spec sheet is applied all of the PDP TV with PD31B chassis.

2. Requirement for Test

Each part is tested as below without special appointment.

(1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C (2) Relative Humidity: 65 % ± 10 % (3) Power Voltage

: Standard input voltage (AC 100-240 V~, 50/60 Hz) * Standard Voltage of each products is marked by models.

(4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with

BOM.

(5) The receiver must be operated for about 5 minutes prior to the adjustment.

3. Test method

(1) Performance: LGE TV test method followed (2) Demanded other specification

- Safety : CE, IEC specification

- EMC : CE, IEC

4. Module General Specification

- 42" 2D HD

No Item Specication Remark

1 Display Screen Device 106 cm (42 inch) wide Color Display Module PDP

2 Aspect Ratio 16:9

3 PDP Module PDP42T4####,

RGB Closed (Well) Type, Glass Filter (38%) Pixel Format: 1024 horiz. By 768 ver.

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

2) Humidity : 20 ~ 80%

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

2) Humidity : 10 ~ 90 %

6 Input Voltage AC100 ~ 240V, 50/60Hz Maker LG

LGE SPEC

Only for training and service purposes

- 4 -

5. Model General Specification

No Item Specication Remark

1 Market Albania, Austria, Belgium, Bosnia, Bulgaria, Coratia,

Czech, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Kazakhstan, Latvia, Lithuania, Luxembourg, Morocco, Netherlands, Norway, Poland, Portugal, Romania, Russia, Serbia, Slovenia, Spain, Sweden, Slovakia, Switzerland, Turkey, Ukraine, UK

Australia, New Zealand, Malaysia, Indonesia, Singapore, South Africa, Israel, Iran, Vietnam, Kenya, Asia,Non-EU analog, CHINA(cormmercial)

2 Broadcasting system 1) PAL/SECAM BG

2) PAL/SECAM DK

3) PAL I / II

4) SECAM L/L’

5) DVB T

6) DVB C

7) DVB T2

8) DVB S2

1) PAL/SECAM BG

2) PAL/SECAM DK

3) PAL I

4) NTSC M

5) DVB T

3 Receiving system Analog : Upper Heterodyne

Digital : COFDM

4 Scart Jack (1EA) PAL, SECAM EU ONLY

5 Component Input (1EA) Y/Cb/Cr, Y/ Pb/Pr

6 RGB Input (1EA) RGB-PC Commercial Model ONLY

7 RS232C (1EA) SVC Commercial Model ONLY

8 AV (2EA) CVBS ( Hybrid :1) EU model have 1 AV ( Hybrid)

9 HDMI Input (2 or 3EA) HDMI-PC

HDMI-DTV

10 Audio Input (1EA) DVI Audio, Component L/R Input

11 SPDIF Out (1 EA) SPDIF Out

12 USB (1EA) for SVC, S/W Download, DivX

13 LAN only DVB-T2 (UK, Irend) Model

14 PCMCI (1EA) DVB-T/C Decryption Interface, CI+ EU ONLY

36 Country

Non-EU

Programme Coverage (EU) Digital TV

- PD31B/C are not support SECAM L/L`

- Only PD31B support DVB-T2

- Only PD31C support DVB-S2 Analogue TV VHF: E2 to E12, UHF: E21 to E69, CATV: S1 to S20, HYPER: S21 to S47

Programme Coverage (NON-EU) Digital TV VHF 04 to 13, UHF 27 to 69 Analogue TV VHF/UHF 1 to 78, CATV 01 to 71

HDMI/PC 1, HDMI2

Only for training and service purposes

- 5 -

ADJUSTMENT INSTRUCTION

1. Application Range

This spec. sheet applies to PD31B chassis applied PDP TV all models manufactured in TV factory.

2. Designation

(1) Th e ad justm ent is accord ing to the order whic h is

designated and which must be followed, according to the

plan which can be changed only on agreeing. (2) Power adjustment : Free Voltage. (3) Magnetic Field Condition: Nil. (4) Input signal Unit: Product Specification Standard. (5) Reserve after operation: Above 5 Minutes (Heat Run)

Temperature : at 25 °C ± 5 °C Relative humidity : 65 % ± 10 % Input voltage : 220V, 60Hz

(6) Adjustment equipment s : Color Ana lyzer (CA -210 or

CA-110), DDC Adjustment Jig equipment, SVC remote

controller. (7) The receiver must be operated for about 5 minutes prior to

the adjustment when module is in the circumstance of over

- In case of keeping module is in the circumstance of 0°C, it

should be placed in the circumstance of above 15°C for 2 hours.

- In case of keeping module is in the circumstance of below

-20°C, it should be placed in the circumstance of above 15°C for 3 hours.

3. Main PCB check process

* APC - After Manual-Insult, executing APC

* Boot file Download

(1) Execute ISP program “Mstar ISP Utility” and then click

“Config” tab.

(2) Set as below, and then click “Auto Detect” and check “OK”

message

If “Error” is displayed, Check connection between computer,

jig, and set.

(3) Click “Read” tab, and then load download file (XXXX.bin)

by clicking “Read”

(4) Click “Connect” tab. If “Can’t ” is displayed, Check

connection between computer, jig, and set.

■ After RGB Full White in HEAT-RUN Mode, the receiver must

be operated prior to the adjustment.

■ Enter into HEAT-RUN MODE

1) Press the POWER ON KEY on R/C for adjustment.

2) OSD display and screen display PATTERN MODE.

● Set is activated HEAT run without signal generator in this

mode.

● Single color pattern ( WHITE ) of HEAT RUN MODE uses to

check panel.

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

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

(8) Push The “IN STOP KEY” – For memory initialization.

Case1 : Software version up

1) After downloading S/W by USB , Multi-vision set will reboot

automatically

2) Push “In-stop” key

3) Push “Power on” key

4) Function inspection

5) After function inspection, Push “In-stop” key.

Case2 : Function check at the assembly line

1) When TV set is entering on the assembly line, Push “In-

stop” ke y at rst.

2) Push “Power on” key for turning it on.

-> If you push “Power on” key, TV set will recover channel information by itself.

3) After function inspection, Push “In-stop” key.

(5) Click “Auto” tab and set as below. (6) Click "Run". (7) After downloading, check "OK" message.

Only for training and service purposes

- 6 -

* USB DOWNLOAD(*.epk file download)

(1) Put the USB Stick to the USB socket (2) Automatically detecting update file in USB Stick

- If your downloaded program version in USB Stick is Low,

it didn’t work.

- But your downloade d version is High, USB data is

automatically detecting

(3) Show the message “Copying files from memory”

(4) Updating is staring.

(5) Updating C om pl et ed, T he Mu lt i- vi si on will restart

automatically.

(6) If your Multi-vision is turned on, check your updated

version and Tool option. (explain the Tool option, next stage)

* After downloading, have to adjust TOOL OPTION again.

1) Push "IN-START" key in service remote controller.

2) Select "Tool Option 1" and Push “OK” button.

3) Punch in the number. (Each of mode ls has th eir number.)

4) Completed selecting Tool option.

42PN450D-Z*

HD/FHD HD

Tool option 1 24576

Tool option 2 21800

Tool option 3 3313

Tool option 4 51846

Tool option 5 42(170)

* UK Model

* Caution : Using ‘power on’ button of the Adjustment R/C ,

power on Multi-vision.

* ADC Calibration Protocol (RS232)

NO Enter

Adjust MODE

Item Adjust ‘Mode In’ ADC Adjust

CMD 1 A A

CMD 2 A D

Data 0 0 1

0 0

When transfer the ‘Mode In’, Carry the command.

- Adjust Sequence

▪aa 00 00 [Enter Adjust Mode] ▪xb 00 40 [Component1 Input (480i)] ▪ad 00 10 [Adjust 480i Comp1] ▪aa 00 90 End Adjust mode

* Required equipment : Adjustment R/C.

ADC adjust

Automatically adjustment (The use of a internal pattern)

3.2. Function Check

3.2.1. Check display and sound

■ Check Input and Signal items. (cf. work instructions)

1) TV

2)AV (SCART/ CVBS)

3) COMPONENT (480i)

4) HDMI

5) PC Audio In * Display and Sound check is executed by Remote controller.

* Caution : Not to push the INSTOP KEY after completion if

the function inspection.

3.1. ADC Process

3.1.1. ADC

■ Enter Service Mode by pushing “ADJ” key, ■ Enter Internal ADC mode by pushing “►” key at “5. ADC

Calibration”

Only for training and service purposes

- 7 -

4. Total Assembly line process

4.1. POWER PCB Assy voltage adjustment

(Vs voltage adjustment)

4.1.1.Test equipment : D.M.M 1EA

4.1.2. Condition for adjustment

- No signal with the snow noise in RF mode

4.1.3. Connection Diagram for Measuring

: refer to g.7

4.1.4. Adjustment method

4.1.4.1 Vs adjustment (1) Connect + terminal of D. M..M. to Vs TP, connect -terminal

to GND.

(2) After turning VR901, voltage of D.M.M adjustment as same

as Vs voltage which on label of panel right/top ( deviation ; ±0.5V)

4.1.4.2 Va adjustment (1) Connect + terminal of D. M..M. to Va TP, connect -terminal

to GND.

(2) After turning VR502, voltage of D.M.M adjustment as same

as Va voltage which on label of panel right/top ( deviation ; ±0.5V)

4.2. Adjustment Preparation

● Required Equipment

- Remote controller for adjustment

- Color Analyzer ( CS-1000, CA-100,100+,CA-210 or same product : CH 11 (PDP)

* Please adjust CA-210, CA-100+ by CS-1000 before measur-

ing

- Auto W/B adjustment instrument(only for Auto adjustment)

- 9 Pin D-Sub Jack(RS232C) is connected to the AUTO W/B EQUIPMENT.

Before Adjust of White Balance, Please press POWER ONLY key

- Adjust Process will start by execute RS232C Command.

● Color temperature standards according to CSM and Module

CSM PLASMA

Cool 11000K

Medium 9300K

Warm 6500K

● CS-1000/CA-100+/CA-210(CH 10) White balance adjust-

ment coordinates and color temperature.

CSM Color Coordination Temp ± Color

x y

COOL 0.276 0.283 11000K 0.002

MEDIUM 0.285 0.293 9300K 0.002

WARM 0.313 0.329 6500K 0.002

Coordination

* Connecting picture of the measuring instrument (On Auto-

matic control)

- Inside PATTERN is used when W/B is controlled. Connect to auto controller or push Adjustment R/C POWERON -> Enter the mode of White-Balance, the pattern will come out.

Only for training and service purposes

- 8 -

* Auto-control interface and directions

1) Adjust in the place where the inux of light like oodlight

around is blocked. (Illumination is less than 100Lux).

2) Adhere closely the Color Analyzer ( CA210 ) to the module less than 10cm distance, keep it with the surface of the Module and Color Analyzer’s Prove vertically. (80~100°).

3) Aging time

- After aging start, keep the power on (no suspension of power supply) and heat-run over 5 minutes.

- Using ‘no signal’ or ‘full white pattern’ or the others, check the back light on.

■ Auto adjustment Map(RS-232C)

RS-232C COMMAND

[ CMD ID DATA ]

Wb 00 00 White Balance Start Wb 00 ff White Balance End

RS-232C

COMMAND

[CMD ID DATA]

Cool Mid Warm Cool Mid Warm

R Gain jg Ja jd 00 172 192 192 192

G Gain jh Jb je 00 172 192 192 192

B Gain ji Jc jf 00 192 192 172 192

R Cut 64 64 64 128

G Cut 64 64 64 128

B Cut 64 64 64 128

* Caution

- Color Temperature : COOL, Medium, Warm.

- One of R Gain/G Gain/ B Gain should be kept on 0xC0, and adjust other two lower than C0. (when R/G/B Gain are all C0, it is the FULL Dynamic Range of Module)

* Manual W/B process using adjusts Remote control.

■ After enter Service Mode by pushing “ADJ” key, ■ Enter White Balance by pushing “►” key at “6. White

Balance”.

■ Stick the sensor to the center of the screen and select

each items(Red/Green/Blue Gain) using ▲/▼(CH +/-)

key on R/C.

■ Adjust R/G/B Gain using◄/►(VOL +/-) key on R/C. ■ Adjust three modes all(Cool/Medium/Warm) : Fix the one

of R/G/B Gain and Change the others.

■ When the adjustment is completed, Enter “COPY ALL”. ■ Exit adjustment mode using EXIT key on R/C.

CENTER

(DEFAULT)

A X

* After You nish all adjustments, Press “In-start” button and

compare Tool option and Area option value with its BOM, if it is correctly same 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’s module from factory JIG model. * Push The “IN STOP KEY” after completing the function

inspection. And Mechanical Power Switch must be set “ON”

* To check the coordinates of White Balance, you have to

measure at the below conditions.

- Picture mode : Vivid, Energy Saving : Off, Below the Ad-

vanced control, Dynamic Contrast : Off, Dynamic Colour : Off

Colour Temp.

Cool 30

Medium 0

Warm 30

-> Picture Mode change : Vivid -> Vivid(User)

4.3. DDC EDID Write (HDMI 256Byte)

-> Not used any more, Use Auto D/L

■ Connect HDMI Signal Cable to HDMI Jack. ■ Write EDID DATA to EEPROM(24C02) by using DDC2B

protocol.

■ Check whether written EDID data is correct or not.

* For SVC main Ass’y, EDID have to be downloaded to Insert

Process in advance.

4.4. EDID DATA

(1) All Data : HEXA Value (2) Changeable Data : * : Serial No : Controlled / Data:01 ** : Month : Controlled / Data:00 *** : Year : Controlled **** : Check sum

4.5. EDID DATA Auto Download

(1) Press Adj. key on the Adj. R/C, (2) Select EDID D/L menu. (3) By pressing Enter key, EDID download will begin (4) If Download is successful, OK is display, but If Download is

failure, NG is displayed.

(5) If Download is failure, Re-try downloads.

Only for training and service purposes

- 9 -

4.6 LNB voltage and 22KHz tone check

(1) Test method

1) Press "Power on" button of a service R/C.(Baud rate : 115200 bps)

2) Connect cable between satellite ANT and test JIG.

3) Connect RS232-C Signal Cable.

4) Write LNB ON control command through RS-232-C.

5) check LED light ‘ON’ at 18V menu.

6) check LED light ‘ON’ at 22KHz tone menu.

7) Write LNB OFF control command through RS-232-C.

8) check LED light ‘OFF’ at 18V menu.

9) check LED light ‘OFF’ at 22KHz tone menu.

(2) RS-232 command for test LNB

Command Set ACK

LNB On [A][I][ ][Set ID][ ][30][Cr] [O][K][x] or NG : [N][G][x] LNB Off [A][I][ ][Set ID][ ][40][Cr] [O][K][x] or NG : [N][G][x]

(3) Test result

- After send LNB On command, ‘18V LED’ and ‘22KHz

tone LED’ should be ON.

- After send LNB Off command, ‘18V LED’ and ‘22KHz tone

LED’ should be OFF.

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■ Edid data and Model option download (RS232 Zender)

NO Enter

download MODE

EDID data and

Model option download

Item download ‘Mode In’ download

CMD 1 A A

CMD 2 A E

Data 0 0 00

0 10

When transfer the

‘Mode In’,

Carry the command.

Automatically download

(The use of a internal

Data)

- Manual Download * Caution

● Use the proper signal cable for EDID Download

- Digital EDID : Pin3 exists

* Caution

- Never connect HDMI & D-sub Cable at the same time.

- Use the proper cables below for EDID Writing.

- Download HDMI1, HDMI2 separately because HDMI1 is different from HDMI2.

For HDMI EDID

DVI-D to HDMI or HDMI to HDMI

<Remark> After the measurement conditions witnessed in the last state.

* Caution : Never connect HDMI & D-sub Cable when EDID

downloaded.

No. Item Condition Hex Data

1 Manufacturer ID GSM 1E6D

2 Version Digital : 1 01

3 Revision Digital : 3 03

Only for training and service purposes

- 10 -

* 2D HD EDID data

- 2D HD HDMI1 EDID data

- 2D HD HDMI2 EDID data

4.7. GND & Hi-pot test

■ GND TEST = POWER CORD GND and SIGNAL CABLE

GND

■ Hi-pot TEST = POWER CORD GND and LIVE&NUETRAL ■ Test Process

1. Check the POWER CABLE and SIGNAL CABLE insertion condition.

2. Connect the AV JACK Tester

3. Controller(GWS103-4) on

4. GND TEST(Auto)

- If Test is failed, Buzzer operate

- If Test is passed, execute next process(HI-pot test)

- Remove A/V CORD from A/V JACK BOX

5. HI-POT test(Auto)

- If Test is failed, Buzzer operate

- If Test is passed, GOOD Lamp on and move to next process automatically.

■ Checkpoint

(1) Test voltage

1) 3 Poles

- GND: 1.5KV/min at 100mA

- SIGNAL: 3KV/min at 100mA

2) 2 Poles

- SIGNAL: 3KV/min at 100mA

(2) TEST time: 1 second (3) TEST POINT

1) 3 Poles

- GND Test = POWER CORD GND and SIGNAL

CABLE GND.

- Hi-pot Test = POWER CORD GND and LIVE &

NEUTRAL.

2) 2 Poles

- Hi-pot Test = Accessible Metal and LIVE & NEUTRAL.

(4) LEAKAGE CURRENT: At 0.5mArms

* Vender ID

Input HEX

HDMI1 10

HDMI2 20

HDMI3 30

* Checksum: Changeable by total EDID data.

EDID C/S data 2D-HD

HDMI

check sum

(Hex)

Only for training and service purposes

Block 0 0x3E

Block 1 0x24(HDMI1)

0x14(HDMI2)

- 11 -

+ 25 hidden pages