LG 42PC1DV Schematic

PLASMA TV

SERVICE MANUAL

CAUTION

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

CHASSIS : PB61A

MODEL : 42PC1DV

42PC1DV-AA

website:http://biz.LGservice.com

e-mail:http://www.LGEservice.com/techsup.html

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CONTENTS

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

DESCRIPTION OF CONTROLS ..........................................................................4

SPECIFICATIONS ..............................................................................................10

ADJUSTMENT INSTRUCTIONS .......................................................................12

TROUBLE SHOOTING GUIDE..........................................................................17

PRINTED CIRCUIT DIAGRAM ..........................................................................23

BLOCK DIAGRAM.............................................................................................27

EXPLODED VIEW..............................................................................................30

EXPLODED VIEW PARTS LIST ........................................................................31

REPLACEMENT PARTS LIST...........................................................................32

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

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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

TVD/A

INPUT

DVD

ARC

EXIT

VOL

SIZE

INDEX

TIME

REVEAL PIP PR +

PIP INPUT

SWAP

PIP PR -

Q.VIEW

MUTE

SLEEP

LIST

I/II

TEXT PIP

GUIDE

INFO

VCR

POWER

123

456

789

FAVAPM

D/A INPUT

(Digital TV /

Analogue TV)

INPUT

POWER

ARC

+/-

THUMBSTICK

(Up/Down/Left

Right/OK)

VOLUME +/-

Q.VIEW

MUTE

Programme +/-

APM

FAV

(FAVOURITE)

PIP PR +/-

PIP INPUT

SWAP

Selects digital or analogue mode.

External input modes rotate in regular sequence: Digital, Analogue, AV1-2, Component 1-2, RGBDTV (or RGB-PC), HDMI/DVI.

Switches the set between ON and STANDBY.

Selects your desired picture format.

Adjusts brightness on screen. It returns to the default settings brightness by

changing mode source.

Control some video cassette recorders or DVD players ("RECORD" button is not available for DVD player).

Accepts your selection or displays the current mode.

Adjusts menu settings. Selects menu item.

Increase/decrease the sound level.

Returns to the previously viewed programme.

Switches the sound on or off.

Selects a programme.

Concurrently, compare with the Dynamic, Standard, Mild, User1 and User2 on the screen.

Displays the selected favourite programmes.

Selects a programme for the sub picture.

Selects the input mode for the sub picture.

Alternates between main and sub picture in PIP/Twin picture mode.

NUMBER button

VCR/DVD

control buttons

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DESCRIPTION OF CONTROLS

- 5 -

Open the battery compartment cover on the back side and install the batteries matching correct polarity (+with +,-with -).

Install two 1.5V AA batteries. Don’t mix old or used batteries with new ones.

Close cover.

Use a remote control up to 7 meters distance and 30 degree (left/right) within the receiving unit scope.

Dispose of used batteries in a recycle bin to preserve environment.

TVD/A

INPUT

DVD

ARC

LIST

I/II

TEXT PIP

GUIDE

INFO

VCR

POWER

TVD/A

INPUT

DVD

ARC

TEXT PIP

GUIDE

INFO

VCR

POWER

Installing Batteries Remote control effective range

TV, DVD,

VCR,

PIP

GUIDE

INFO

COLOURE

Button

EXIT

LIST

I/II

SLEEP

TELETEXT

BUTTONS

Selects the remote operating mode: TV, VCR, DVD. Select other operating modes, for the remote to operate external devices.

Switches to PIP, POP and Twin picture modes or off mode.

Shows a programme schedule.

Shows the present screen information.

They are used as per the indications or functions displayed on the TV screen in the case of Text displays (Teletext, EPG) and programme edit.

Returns to TV viewing from any menu.

Displays the programme table.

Selects a menu.

Selects the sound output or the audio mode.

Sets the sleep timer.

These buttons are used for teletext. Text button is used to enable teletext services while other buttons are for teletext

functions. * For further details, see the ‘Teletext’ section

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Front Panel Controls

VOLOK

INPUT

Remote Control Sensor

POWER Button

INPUT Button

MENU Button

OK Button

VOLUME (

FF,GG

)Buttons

PROGRAMME (

EE,DD

)Buttons

Power Standby Indicator

Illuminates red in standby mode. When the TV is turned on, the indicator blinks white and then illuminates white before the picture is displayed.

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Back Connection Panel

- 8 -

ACCESSORIES

Owner’s Manual

Owner’s Manual Batteries

TVD/A

INPUT

DVD

ARC

EXIT

VOL

SIZE

INDEX

TIME

REVEAL PIP PR +

PIP INPUT

SWAP

PIP PR -

Q.VIEW

MUTE

SLEEP

LIST

I/II

TEXT PIP

GUIDE

INFO

VCR

POWER

123

456

789

FAVAPM

Remote Control Power Cord

For 42PC1D/42PC1DG/42PC1DV/50PC1D

2-Wall brackets

2- Bolts

42PC1DG

/42PC1DV only

42PC1DG

/50PC1D only

Polishing Cloth

Polish the screen with

the cloth.

2-eye-bolts

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STAND INSTALLATION (OPTION)

Figures shown here may be slightly different from your set.

When closing the stand for storage

First remove the screws in the holes (B) on the bottom

of the stand. And then pull two Hooks (D) of the stand

bottom

and fold the stand into the back of the set.

After folding, push two Locks (A) of the stand bottom

outward.

O Place the set with the screen facing down on a cushion or soft cloth as shown in Figures 1.

Before unfolding the stand, please make sure two locks (A) on the bottom of the stand push outward.

O Pull the stand out as shown above in Figures 2 ~ 3.

After unfolding the stand, please insert and tighten the screws in the holes (B) on the bottom of the stand.

O When connecting cables to the set, Do not disengage the lock (C).

This may cause the set to fall, causing serious bodily injury and serious damage to the set.

3 4

* NOTE

SPECIFICATIONS

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

V Application Range

This spec is applied to the 42” PLASMA TV used PB61A 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. Module Specification

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Display area

Outline dimension

Number of Pixels

Cell pitch

Color arrangement

Weight(net)

Weight(gross)

Operation Environment Temperature

Humidity

Pressure

Storage Environmnet Temperature

Humidity

Pressure

I mage stick minimization Start time

mode Low Brightness

Arrival Time

920.1 (H) * 518.4(V) ± 0.5

1005(H) * 597(V) * 60.7(D) ±1

852(H) * 480(V)

320(H) * 1080(V)

RGB closed type

13.1 13.6 14.1

82.5 87.5 92.5

0 ~ 55

20 ~ 80

800 ~ 1100

-20 ~ 60

10 ~ 90

700 ~ 1100

4.5 5 5.5

14 15 16

No Item Remark

1Pixel=3RGB Cells

Green Cell basis

5EA 1 Box

Altitude : 0 to 2000M

Altitude : 0 to 3000M

Chassis

PB61A 42PC1DV-AA Australia LG

Model Name Market Brand Remark

42PC1DV-AA Safety : IEC60065,EN60065

EMC : CISPR 13 Class B

Australia

Model ApplianceMarket Remark

deg

hPa

deg

hPa

min

Min Typ Max Unit

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2. Model General Specification

Broadcasting system

Available Channel

Tuner IF

Input Voltage

PDP Module

Aspect ratio

Operating Temperature

Operating Humidity

Storage Temperature

Storage Humidity

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

240V~, 50Hz

PDP42V8

16:9 (wide)

0 40 deg

85 %

-20 60 deg

85 %

Item

Remark

Maker : LGE

RGB Closed Type

Specification

Min Typ Max Unit

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ADJUSTMENT INSTRUCTIONS

1. Application Object

These instructions are applied to all of the 42” PLASMA TV, PB61A

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 applied to the test for afterimage

discharge detection, and 100% FULL WHITE PATTERN must be operated automatically.

O Test for afterimage discharge detection

1) After pressing Power Only key(only operating by pressing Power Only key), Full Test Pattern(2 min 30sec) --> Full Black Pattern(30sec) --> After this state, Full White Pattern is displayed. (but you must preset the program for Full White State when you press the Main Power Off/On)

2) Pattern Mode is deselected by pressing CH +/-, Exit Key.

[ Set is activated HEAT-RUN without signal generator in

this mode.

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.

3. CPLD Download

(1) Test Equipment: PC, Jig for download (2) Connect the power of VSC B/D. (3) Execute download program of PC. (4) After executing the hot key on the Programmer, click icon. (5) End after confirming.

4. Sub-ucom(MTV) Download

(1) Test Equipment: PC, Jig for download (2) Connect the power of VSC B/D. (3) Execute download program of PC. (4) After executing the hot key on the Programmer, click icon. (5) End after confirming.

5. MST3362M-Set Adjustment

5-1. Synopsis

MST3362M-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-925 Pattern Generator. ( 480i, 1080i 60Hz Color Bar Pattern output will be possible and the output level will accurately have to be revised with

0.7±0.1Vp-p)

5-3. Adjustment

(1) How to adjustment the Component1

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, 'Component1 Adjustment OK’ is displayed. If the adjustment has errors, 'Component1 Adjustment Failed! Try Again!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

(2) How to adjustment the Component2, RGB

1) Select Component2, RGB-DTV as the input with Color Bar Pattern in 1080i 60Hz mode and select ‘Component2’ 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 ‘2. ADC 1080i Comp2/RGB’. Pressing the Vol+ Key to adjust the component2.

3) When the adjustment is over, 'Component2 Adjustment OK’ is displayed. If the adjustment has errors, 'Component2 Adjustment Failed! Try Again!’ is displayed. and If the adjustment has errors, 'RGB Adjustment Failed! Try Again!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

VSC

B/D

JIG cable(CPLD D/L )

<Fig. 1> Connection Diagram of CPLD Download

(Fig. 2) Adjust Pattern : 480i, 1080i 60Hz Color Bar Pattern

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6. Video(uPD)-Set

6-1. Synopsis

This is a adjustment to reduce the color difference of video signal Main/Sub Display.

6-2. Required Equipment

Service R/C, MSPG-925 Pattern Generator. (It’s available to output the Color Bar Pattern of the NTSC,PAL)

6-3. Adjustment

(1) How to adjustment the uPD PAL

1) Select AV1 as the input with 100% 8 Color Bar Pattern in PAL mode and select ‘AV1’ 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 ‘3. uPD PAL(Main&Sub)-Set’. Pressing the Vol+ Key to adjust the uPD PAL.

3) When the adjustment is over, 'uPD64015 PAL Main Adjustment OK’ and ‘uPD64015 PAL Sub Adjustment OK’ is displayed. If the adjustment has errors, 'uPD64015 PAL Main Error!’ or 'uPD64015 PAL Main Error!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

(2) How to adjustment the uPD NTSC

1) Select AV1 as the input with 100% 8 Color Bar Pattern in NTSC mode and select ‘AV1’ 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 ‘4. uPD NTSC(Main&Sub)-Set’. Pressing the Vol+ Key to adjust the uPD NTSC.

3) When the adjustment is over, 'uPD64015 NTSC Main Adjustment OK’ and ‘uPD64015 NTSC Sub Adjustment OK’ is displayed. If the adjustment has errors, 'uPD64015 NTSC Main Error!’ or 'uPD64015 NTSC Main Error!’ is displayed.

4) Readjust after confirming the case Pattern or adjustment condition where the adjustment had errors.

5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.

7. POWER PCB Assy Voltage Adjustment (Va, Vs Voltage Adjustment)

7-1. Test equipment: D.M.M 1EA

7-2. Connection Diagram for Measuring

Refer to Fig.5

7-3. Adjustment Method

Adjustment Method for Power Board( P/No: 6709900019A)

(1) Va Adjustment

1) After receiving 100% Full White Pattern, HEAT RUN.

2) Connect + terminal of D.M.M to Va pin of P812, connect

- terminal to GND pin of P812.

3) After turning VR0901, 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 P812, connect – terminal to GND pin of P812.

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)

(Fig. 3) Adjust Pattern :100% 8 Color Bar Pattern

Each PCB Assy must be checked by Check JIG Set before assembly. (Especially, be careful Power PCB Assy which can cause Damage to the PDP Module.)

Vs AD J

VR951

Va A DJ

VR901

GND

P821

GND

P822

P811

P812

Vs AD J

VR951

Va A DJ

VR901

GND

P821

GND

P822

P811

P812

(Fig. 5) Connection Diagram of Power Adjustment for Measuring

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8. EDID(The Extended Display Identification Data)/DDC (Display Data Channel) Download

This is the function that enables “Plug and Play".

8-1. Required Test Equipment

(1) PC, Jig for adjusting DDC.

(PC serial to D-sub Connection equipment)

(2) DVI to HDMI Connector.

8-2. Setting of Device

8-3. EDID DATA

(1) HDMI EDID DATA.

(2) HDMI EDID DATA.

8-4. Act or set the EDID S/W

1) As above Fig. 6, Connect the Set, EDID Download Jig, PC & Cable.

2) Turn on the PC & EDID Download Jig. And Execute the S/W : EDID TESTER Ver,2.5.

3) Set up S/W option.

Repeat Number : 3 Device Address : A0 PageByte : 8

8-5. How to use the EDID S/W

1) Init the data.

2) Load the EDID data.(Open File)

42PC1DV_AA_HDMI(0145).DVI

42PC1DV_AA_RGB(31).ana

3) Press the “Write Data & Verify”button. and input the

data.

4) If the writing is finished, you will see the “OK” message.

Analog EDID

D-sub to D-sub

HDMI EDID

DVI-D to HDMI

JIG

PDP

SET

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9. Adjustment of White Balance

9-1. Required Equipment

(1) Color analyzer (CA-210 or similar product) (2) Automatic adjustor (with automatic adjustment hour

necessity and the RS-232C communication being possible)

9-2. Connection Diagram of Equipment

for Measuring (Automatic Adjustment)

9-3. Process of automatic adjustment

(1) As using the white pattern for adjustment the inner part,

HDMI connection need not. But as lower part, the RS-232C Command is used.

Wb 00 00 start of automatic adjustment the white balance. Wb 00 10 Start of gain adjustment.(inside pattern) Ja 00 ff Adjustment Date. Jb 00 c0 ... Wb 00 1f Ending gain adjustment. As occasion demands , adjust the offset. ( Wb 00 20(Start) , Wb 00 2f(end))

Caution) When you adjust, automatically, RS-232C

Command is used.

[[

RS-232C Command (Automatic Adjustment)

9-4. Adjustment of White Balance

(Automatic Adjustment)

Calibrate of the CA-210, then attach sensor to PDP module surface when you adjust.

Manual adjustment is also possible by the following sequence.

(1) HEAT RUN at least 30 minutes by pressing the Power only

Key on the Service Remote Control and adjust. and use power only or tint key and establish BaudRate to 115200.

(2) It must start “ 00 00”, complete “wb 00 ff”. (3) Adjust offset.

9-5. Adjustment of White Balance

(Passivity Adjustment)

(1) HEAT RUN at least 30 minutes by pressing the ‘7. White-

Pattern’ on the Service Remote Control and adjust.

(2) After attaching sensor to center of screen, select ‘7. White-

Balance’ of ‘Ez - Adjust’ by pressing the ADJ KEY on the Service R/C. Then enter adjustment mode by pressing the Right KEY (

). This time white pattern is displayed.

(3) Adjust the High Light using B Gain/G Gain - [Cool].

(B Gain 192, R-Cut/G-Cut/B-Cut: 64/62/65 Fix.)

Adjust the High Light using B Gain/R Gain - [Medium].

(B Gain 192, R-Cut/G-Cut/B-Cut: 65/62/66 Fix.)

Adjust the High Light using G Gain/B Gain - [Warm].

(B Gain 192, R-Cut/G-Cut/B-Cut: 62/62/65 Fix.)

(4) Adjust using Volume +/- KEY.

Value of bright : High Level -> 216gray

[Cool]

X; 0.278±0.0015 Y; 0.279±0.0015 Color temperature: 11000°K ±1000°K dUV: -3dUV

[Medium]

X; 0.287±0.0015 Y; 0.289±0.0015 Color temperature: 9300°K±1000°K dUV: -3dUV

[Warm]

X; 0.314±0.0015 Y; 0.318±0.0015 Color temperature: 6500°K±1000°K dUV: -3dUV

(5) After adjustment is complete, exit the adjustment mode by

pressing the ADJ KEY.

216 FULL WHITE

CVBS Part

PDP MONITOR

COLOR

ANALYZER

TYPE; CA-100

<Fig. 6> Connection Diagram of Automatic Adjustment

R Gain

G Gain

B Gain

R Offset

G Offset

B Offset

CENTER

(DEFAULT)(Hex)

Min

Max

(Hex)

C0(Fix)

Cool

C0(Fix)

Mid

C0(Fix)

Warm

RS-232C COMMAND

[CMD ID DATA]

Cool

Mid

Warm

- 16 -

10. Check the adjustment of the plant shipping mode

: This adjustment is checking the set state after take a adjustment of examination, check state of this model as shown below pressing the IN_STOP button on the adjustment Remote Controller.

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

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