LG 42PN4500-SA, 42PN4500, 42PN4500-UA, 42PN450P, 42PN450P-UA Service Manual

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

Internal Use Only

Printed in KoreaP/NO : MFL67648804 (1301-REV00)

CHASSIS : PB31A

MODEL : 42PN4500 42PN4500-SA

CAUTION

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

PLASMA TV

SERVICE MANUAL

- 2 -

Only for training and service purposes

CONTENTS

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

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

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

ADJUSTMENT INSTRUCTION ................................................................ 5

BLOCK DIAGRAM .................................................................................. 12

EXPLODED VIEW .................................................................................. 13

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

- 3 -

Only for training and service purposes

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

Ω and 5.2 MΩ.

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 1.5 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

IMPORTANT SAFETY NOTICE

To Instrument's exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

SAFETY PRECAUTIONS

- 4 -

Only for training and service purposes

SPECIFICATION

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

1. Application range

This spec sheet is applied all of the 42” 50”, 60” PDP TV with PB31A 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. Model General Specification

No Item Specication Remark

1 Receiving System 1) SBTVD / NTS-M / PAL-M / PAL-N 60PN6500-SC, 50/42PN4500-SA

60PN6500-SX, 50PN4500-SZ

2) DVB-T / NTSC-M / PAL-M / PAL-N 60PN6500-DC, 50/42PN4500-DA

2 Available Channel 1) VHF : 2~13

2) UHF : 14~69

3) DTV : 7-69

4) CATV : 1~135

60PN6500-SC, 50/42PN4500-SA 60PN6500-SX, 50PN4500-SZ

1) VHF : 2~13

2) UHF : 14~69

3) DTV : 14~69

4) CATV : 1~125

60PN6500-DC, 50/42PN4500-DA

3 Input Voltage 1) AC 100 ~ 240V 50/60Hz

4 Market Brazil / chile / Peru / Venezuela / Costarica / Uruguay 60PN6500-SC,50/42PN4500-SA

60PN6500-SX, 50PN4500-SZ

Colombia / Panama 60PN6500-DC, 50/42PN4500-DA

5 Screen Size 42 inch Wide(1024 × 768) 42PN all model

50 inch Wide(1024 × 768) 50PN4 all model

50 inch Wide(1920 × 1080) 50PN6 all model

60 inch Wide(1920 × 1080) 60PN6 all model

6 Aspect Ratio 16:9

7 Tuning System FS

8 Module PDP42T4#### (1024 × 768) 42PN all model

PDP50T4#### (1024 × 768) 50PN4 all model

PDP50R4#### (1920 × 1080) 50PN6 all model

PDP60R4#### (1920 × 1080) 60PN6 all model

9 Operating Environment 1) Temp : 0 ~ 40 deg

2) Humidity : ~ 80 %

10 Storage Environment 1) Temp : -20 ~ 60 deg

2) Humidity : ~ 85 %

- 5 -

Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Range

This spec. sheet applies to PB31A chassis applied PDP TV all models manufactured in TV factory.

2. Specification

(1) Because this is not a hot chassis, it is not necessary to

use an isolation transformer. However, the use of isolation transformer will help protect test instrument.

(2) Adjustment must be done in the correct order. But it is

flexible when its factory local problem occurs.

(3) T he adjustment must be performed in the circumstance of

25 °C ± 5 °C of temperature and 65 % ± 10 % of relative humidity if there is no specific designation.

(4) The input voltage of the receiver must keep AC 100-240

V~, 50/60 Hz.

(5) Before adjustment, execute Heat-Run for 5 minutes.

■ After Receive 100% Full white pattern (06CH) then process Heat-run

(or “8. Test pattern” condition of Ez-Adjust status)

■ How to make set white pattern

1) Press Power ON button of Service Remocon

2) Press ADJ button of Service remocon. Select “10. Test

pattern” and, after select “White ” using navigat ion button, and then you can see 100% Full White pattern.

* In this status you can maintain Heat-Run useless any

pattern generator

* Notice: if you maintain one picture over 20 minutes

(Especially sharp distinction black with white pattern – 13Ch, or Cross hatch pattern – 09Ch) then it can appear image stick near black level.

3. Adjustment items

3.1. PCB Assembly adjustment

■ Adjust 480i Comp1

■ Adjust 1080p Comp1/RGB

● If it is necessary, it can adjustment at Manufacture Line

● You can see set adju stm ent status at “9. ADJUST

CHECK” of the “In-start menu”

3.2. Set Assembly Adjustment

■ EDID (The Extended Display Identification Data )

■ Color Temperature (White Balance) Adjustment

■ Make sure RS-232C control

■ Selection Factory output option

4. PCB Assembly Adjustment

4.1. Using RS-232C

- Adjust 3 items at 3.1. PCB assembly adjustments " 4.1. ■ Adjustment sequence" one after the order.

■ Adjustment sequence

■ Necessary items before Adjustment items

● Pattern Generator : (MSPG-925FA)

● Adjust 480i comp1

(MSPG-925FA:model :209, pattern :65) - comp1 Mode

● Adjust 1080p comp1 (MSPG-925FA:model :225 , pattern :65) - comp1 Mode

● Addjust RGB (MSPG-925FA:model :225 , pattern :65)

- RGB-Pc Mode

* If you want more information then see the below Adjustment

method (Factory Adjustment)

■ Adjustment sequence

● aa 00 00: Enter the ADc Adjustment mode.

● xb 00 40: change the mode to component1 (No actions)

● ad 00 10: Adjust 480i comp

● ad 00 10: Adjust 1080p comp

● xb 00 60: change to RGB-Pc mode(No action)

● ad 00 10: Adjust 1080p RGB

● xb 00 90: Endo of Adjustmennt

Order command Set response

1. Inter the Adjustment mode

aa 00 00 a 00 OK00x

2. Change the Source

XB 00 40 XB 00 60

b 00 OK40x (Adjust 480i Comp1 ) (Adjust 1080p Comp1) b 00 OK60x (Adjust 1080p RGB)

3. Start

Adjustment

ad 00 10

4. Return the Response

OKx ( Success condition ) NGx ( Failed condition )

5. Read

Adjustment data

( main ) ad 00 20 ( main ) ad 00 30

(main : component1 480i, RGB 1080p) 000000000000000000000000007c007b006dx (main : component1 1080p) 000000070000000000000000007c00830077x

6. Conrm

Adjustment

ad 00 99 NG 03 00x (Failed condition)

NG 03 01x (Failed condition) NG 03 02x (Failed condition) OK 03 03x (Success condition)

7. End of

Adjustment

ad 00 90 d 00 OK90x

< See ADC Adjustment RS232C Protocol_Ver1.0 >

- 6 -

Only for training and service purposes

5. Factory Adjustment

-> PB31A : USE INTERNAL ADC(LM1) : using internal pattern.

5.1. Auto Adjust Component 480i/1080p RGB 1080p

■ Summary : Adjus tment component 480i/1080i and RGB 1080p is Gain and Black level setting at Analog to Digital converter, and compensate the RGB deviation

■ Using instrument

● Adjustment rem ocon, 801GF(802B, 802F, 802R) or

MSPG925FA pattern generator

( It can output 480i/1 080i hori zontal 100% color bar

pa tt ern signal, an d i ts ou tput level must se tt ing

0.7V±0.1V p-p correctly)

● You must make it sure its resolution and pattern cause every instrument can have different setting

● Adjustment method 480i Comp1, Adjust 1080p Comp1/

RGB (Factory adjustment)

● ADC 480i Component1 adjustment

- Check connection of Component1

- MSPG-925FA -> Model: 209, Pattern 65

● Set Component 480i mode and 100% Horizontal Color Bar Pat te rn( Ho zTV 31 Bar ), t he n s et T V s et t o Component1 mode and its screen to “NORMAL”

● ADC 1080p Component1 / RGB adjustment

- Check connection both of Component1 and RGB

- MSPG-925FA -> Model: 225, Pattern 65

● Set Component 1080p mode and 100% Horizontal Color Bar Pat te rn( Ho zTV 31 Bar ), t he n s et T V s et t o Component1 mode and its screen to “NORMAL”

● After get each the signal, wait more a second and enter

the “IN-START” with press IN-START key of Service remocon. After then se lect “7. External ADC” with navigator button and press “Enter”.

● After Then Press key of Service remocon “Right Arrow

(VOL+)”

● You can see “ADC Component1 Success”

● Component1 1080p, RGB 1080p Adjust is same method.

● Component 1080p Adjustment in Component1 input

mode

● RGB 1080p adjustment in RGB input mode

● If you success RGB 1080p Adjust. You can see “ADC

RGB-DTV Success”

* caution : Set Volume 0 after adjustment

5.2. Use Internal ADC(S7R)

- A DJ( EZ ADJ UST ) - > 6.A DC C ali bra tio n - > A DC Calibration(START)

* EDID (The Extended Display Identification Dat a)/DDC

(Display Data Channel) Download.

■ Summary

● It is established in VESA, for communication between

PC and Monitor without order from user for building user condition. It helps to make easily use realize “Plug and Play” function.

● For EDID data write, we use DDC2B protocol.

- Auto Download

■ After enter Service Mode by pushing “ADJ” key,

■ Enter EDID D/L mode.

■ Enter “START” by pushing “OK” key.

* Caution:

- Neve r conn ect HDMI & D-sub Cable whe n the user downloading .

- Use the proper cables below for EDID Writing

< Adjustment pattern : 480i / 1080p 60Hz Pattern >

- 7 -

Only for training and service purposes

■ It only needs to PCM EDID D/L for North America Product.

* Edid data and Model option download(RS232)

- Manual Download

■ Write HDMI EDID data

● Using instruments

- Jig. (PC Serial to D-Sub connection) for PC, DDC adjustment.

- S/W for DDC recording (EDID data write and read)

- D-sub jack

- Additional HDMI cable connection Jig.

● Preparing and setting.

- Set instruments and Jig. Like pic.5), then turn on PC and Jig.

- Operate DDC write S/W (EDID write & read)

- It will operate in the DOS mode.

■ EDID data (Model name = LG TV)

- MODEL NAME : 42/50PN4###

- HD_HDMI 1

- HD_HDMI 2

- See Working Guide if you want more information about EDID communication.

NO Enter

download MODE

EDID data Model

option download

Item download ‘Mode In’ download

CMD 1 A A

CMD 2 A E

Data 0 0 *Note1

0 *Note2

When transfer the

‘Mode In’,

Carry the command.

Automatically download

(The use of a internal

pattern)

< For write EDID data, setting Jig and another instruments >

Item Adjust ‘Mode Out’’ Adjustment Conrmation

CMD 1 A A

CMD 2 E E

Data 0 9 9

0 9

When transfer the

‘Mode In’,

Carry the command.

To check Download

on Assembly line.

00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01

01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26

0F 50 54 A1 08 00 31 40 45 40 61 40 01 01 01 01

01 01 01 01 01 01 64 19 00 40 41 00 26 30 18 88

36 00 B0 84 43 00 00 18 A0 0F 20 00 31 58 1C 20

28 80 14 00 B0 84 43 00 00 1E 00 00 00 FD 00 3A

3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC

00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 3E

02 03 21 F1 4D 10 1F 04 93 05 14 03 02 12 20 22

15 01 26 15 07 50 09 57 07 67 03 0C 00 10 00 80

2D 01 1D 00 72 51 D0 1E 20 6E 28 55 00 40 84 63

00 00 1E 02 3A 80 18 71 38 2D 40 58 2C 45 00 40

84 63 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25

00 40 84 63 00 00 9E 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 24

00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01

01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26

0F 50 54 A1 08 00 31 40 45 40 61 40 01 01 01 01

01 01 01 01 01 01 64 19 00 40 41 00 26 30 18 88

36 00 B0 84 43 00 00 18 A0 0F 20 00 31 58 1C 20

28 80 14 00 B0 84 43 00 00 1E 00 00 00 FD 00 3A

3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC

00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 3E

02 03 21 F1 4D 10 1F 04 93 05 14 03 02 12 20 22

15 01 26 15 07 50 09 57 07 67 03 0C 00 20 00 80

2D 01 1D 00 72 51 D0 1E 20 6E 28 55 00 40 84 63

00 00 1E 02 3A 80 18 71 38 2D 40 58 2C 45 00 40

84 63 00 00 1E 01 1D 80 18 71 1C 16 20 58 2C 25

00 40 84 63 00 00 9E 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 14

- 8 -

Only for training and service purposes

- Adjustment Color Temperature(White balance)

■ Using Instruments

● Color Analyzer: CA-210 (CH 10)

- Using LCD color temperature, Color Analyzer (CA-

210) must use CH 10, which Matrix compensated (White, Red, Green, Blue compensation) with CS-

2100. See the Coordination bellowed one.

● Auto-adjustment Equipment (It needs when Auto-adjustment – It is availed communicate with RS-232C : Baud rate: 115200)

● Video Signal Generator MSPG-925F 720p, 216Gray

(Model: 217, Pattern 78)

■ Connection Diagram (Auto Adjustment)

● Using Inner Pattern

● Using HDMI input

■ White Balance Adjustment

If you can’t adjust with inner pattern, then you can adjust it using HDMI pattern. You can select option at “Ez-Adjust Menu – 7. White Balance” there items “NONE, INNER, HDMI”. It is normally setting at inner basically. If you can’t adjust using inner pattern you can select HDMI item, and you can adjust.

In manual Adjust case, if you press ADJ button of service remocon, and enter “Ez-Adjust Menu – 7. White Balance”, then automatically inner pattern operates. (In case of “Inner” originally “Test-Pattern. On” will be selected in The “Test-Pattern. On/Off”.

● Connect all cables and equipments like Pic.5)

● Set Baud Rate of RS-232C to 115200. It may set 115200

orignally.

● Connect RS-232C cable to set

● Connect HDMI cable to set

■ RS-232C Command (Commonly apply)

● “wb 00 00”: Start Auto-adjustment of white balance.

● “wb 00 10”: Start Gain Adjustment (Inner pattern)

● “jb 00 c0” :

● …

● “wb 00 1f”: End of Adjustment

* If it needs, offset adjustment (wb 00 20-start, wb 00 2f-

end)

● “wb 00 ff”: End of white balance adjustment (inner pattern

disappear)

■ Adjustment Mapping information

< connection Diagram for Adjustment White balance >

RS-232C COMMAND

[CMD ID DATA]

Meaning

wb 00 00 White Balance adjustment start.

wb 00 10 Start of adjust gain

(Inner white pattern)

wb 00 1f End of gain adjust

wb 00 20 Start of offset adjust

(Inner white pattern)

wb 00 2f End of offset adjust

wb 00 ff End of White Balance adjust

(Inner pattern disappeared)

RS-232C

COMMAND

[CMD ID DATA]

CENTER

(DEFAULT)

A X

Cool Mid Warm Cool Mid Warm

R Gain jg Ja jd 00 184 192 192 192

G Gain jh Jb je 00 187 183 159 192

B Gain ji Jc jf 00 192 161 95 192

R Cut 64 64 64 127

G Cut 64 64 64 127

B Cut 64 64 64 127

- 9 -

Only for training and service purposes

● When Color temperature (White balance) Adjustment (Automatically)

- Press “Power only key” of service remocon and operate automatically adjustment.

- Set BaudRate to 115200.

● You must start “wb 00 00” and finish it “wb 00 ff”.

● If it needs, then adjustment “Offset”.

■ White Balance Adjustment (Manual adjustment)

● Test Equipment: CA-210

- Using PDP color temperature, Color Analyzer (CA-210) must use CH 10, which Matrix compensated (White, Red, Green, Blue compensation) with CS-2100. See the Coordination bellowed one.

● Manual adjustment sequence is like bellowed one.

- Turn to “Ez-Adjust” mode with press ADJ button of service remocon.

- Select “10.Test Pattern” with CH+/- button and press enter. Then set will go on Heat-run mode. Over 30 minutes set let on Heat-run mode.

- Let CA-210 to zero calibration and must has gap more 10cm from center of PDP module when adjustment.

- Press “ADJ” button of service remocon and select “7.White-Balance” in “Ez-Adjust” then press “►” button of navigation key. (When press “►” button then set will go to full white mode)

- Adjust at three mode (Cool, Medium, Warm)

- If “cool” mode

Let B-Gain to 192 and R, G, B-Cut to 64 and then control

R, G gain adjustment High Light adjustment.

- If “Medium” and “Warm” mode Let R-Gain to 192 and R, G, B-Cut to 64 and then control G, B gain adjustment High Light adjustment.

- All of the three mode

Let R-Gain to 192 and R, G, B-Cut to 64 and then control

G, B gain adjustment High Light adjustment.

- With volume button (+/-) you can adjust.

- After all adjustment finished, with Enter (■ key) turn to

Ez-Adjust mode. Then with ADJ button, exit from adjustment mode

* Attachment: White Balance adjustment coordination and

color temperature.

● Using CS-1000 Equipment.

- COOL : T=11000K, ∆uv=0.000, x=0.276 y=0.283

- MEDIUM : T=9300K, ∆uv=0.000, x=0.285 y=0.293

- WARM : T=6500K, ∆uv=0.000, x=0.313 y=0.329

● When tester will measure on Cool condition, adjust W30 on

TV display menu.

● When tester will measure on medium condition, adjust 0 on TV display menu.

● When tester will measure on warm condition, adjust W30 on TV display menu.

● Using CA-210 Equipment. (10 CH)

- Contrast value: 216 Gray

- Brightness spec.

5.3. Test of RS-232C control.

- Press In-Start button of Service Remocon then set the “4.Baud Rate” to 115200. Then check RS-232C control and

5.4. Selection of Country option.

- Selection of country option is allowed only North American model (Not allowed Korean model). It is selection of Country about Rating and Time Zone.

■ Models: All models which PU31A Chassis (See the rst

page.)

■ Press “In-Start” button of Service Remocon, then enter the

“Option” Menu with “PIP CH-“ Button

■ Select one of these three (USA, CANADA, MEXICO) de-

pends on its market using “Vol. +/-“button.

* Caution : Don’t push The INSTOP KEY after completing the

function inspection.

* Caution : Inspection only PAL M / NTSC

Color

temperature

Test

Equipment

Color Coordination

x y

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

Item White average

brightness

Brightness uniformity

Min 49 -20

Typ 60

Max +20

Unit cd/m² %

Remark - 100% Window White

Pattern

- 100IRE(255Gray)

- Picture: Vivid(Medium)

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

- Picture: Vivid(Medium)

- 10 -

Only for training and service purposes

6. GND and ESD Testing

6.1. Prepare GND and ESD Testing.

■ Check the connection between set and power cord

6.2. Operate GND and ESD auto-test.

■ Fully connected (Between set and power cord) set enter the

Auto-test sequence.

■ Connect D-Jack AV jack test equipment.

■ Turn on Auto-controller(GWS103-4)

■ Start Auto GND test.

■ If its result is NG, then notice with buzzer.

■ If its result is OK, then automatically it turns to ESD Test.

■ Operate ESD test

■ If its result is NG, then notice with buzzer.

■ If its result is OK, then process next steps. Notice it with

Good lamp and STOPER Down.

6.3. Check Items.

■ Test Voltage

● GND: 1.5KV/min at 100mA

● Signal: 3KV/min at 100mA

■ Test time: just 1 second.

■ Test point

● GND test: Test between Power cord GND and Signal

cable metal GND.

● ESD test: Test between Power cord GND and Live and

neutral.

■ Leakage current: Set to 0.5mA(rms)

6.4. POWER PCB Ass’y Voltage adjustment

(Va, Vs voltage adjustment)

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

6.4.2. Connection Diagram for Measuring

: refer to g.1

6.4.3. Adjustment method

6.4.3.1. Vs adjustment (refer g.1)

(1) Connect + terminal of D.M.M. to Vs pin of P811, connect

-terminal to GND pin of P811

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

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

6.4.3.2. Va adjustment (refer g.1)

(1) After receiving 100% Full White Pattern, HEAT RUN. (2) Connect + terminal of D.M.M. to Va pin of P811, connect

-terminal to GND pin of P811

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

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

7. Default Service option.

7.1. ADC-Set.

■ R-Gain adjustment Value (default 128)

■ G-Gain adjustment Value (default 128)

■ B-Gain adjustment Value (default 128)

■ R-Offset adjustment Value (default 128)

■ G-Offset adjustment Value (default 128)

■ B-Offset adjustment Value (default 128)

7.2. White balance. Value.

7.3. Temperature Threshold

■ Threshold Down Low 20

■ Threshold Up Low 23

■ Threshold Down High 70

■ Threshold Up High 75

8. USB DOWNLOAD(*.epk le download)

■ Put the USB Stick to the USB socket

■ Press Menu key, and move OPTION

■ Press “FAV” Press 7 times

(g.1) PCB Assy Voltage adjustment

Center(Default)

COOL Mid Warm

R Gain 192 192 192

G Gain 192 192 192

B Gain 192 192 192

R Cut 64 64 64

G Cut 64 64 64

B Cut 64 64 64

- 11 -

Only for training and service purposes

■ Select download le (epk le)

■ After download is nished, remove the USB stick.

■ Press “IN-START” key of ADJ remote control, check the

S/W version.

9. Tool option

42PN4500-SA

Tool option 1 24576

Tool option 2 5392

Tool option 3 3313

Tool option 4 50310

Tool option 5 2058

Country Group Code 3

Country Group BR

Country N/A

+ 23 hidden pages

LG 42PN4500-SA, 42PN4500, 42PN4500-UA, 42PN450P, 42PN450P-UA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual