LG 42 INCH PDP TRAINING Datasheet

42

42 Inch(Wide)

42 42

Inch(Wide) PDP SVC Training Manual

Inch(Wide)Inch(Wide)

PDP SVC Training Manual

PDP SVC Training Manual PDP SVC Training Manual

LG Electronics / DND QA

Contents

ContentsContents

Ⅰ

Ⅰ. Usage/Service Points to be concerned

ⅠⅠ

Ⅱ

Ⅱ. Module formation & spec

ⅡⅡ

Ⅲ

Ⅲ. Screen defect diagnosis

ⅢⅢ

1. 4/7 or 3/7 of screen is not displayed.

2. Screen by Data COF is not displayed.

3. one or more of Data COF IC have regular vertical lines.

4. Data COF IC unit error pattern

5. The screen by Scan COF is not displayed.

6. Regular- interval vertical line in the whole screen.

7. Vertical data copy

8. One or more vertical bars.

9. One or more horizontal bars.

10. Input signal pattern is displayed but the whole brightness of screen is dark.

11. In full white pattern, foreign color is displayed or in full black pattern, misdischarge is partially occurred..

12. In full white pattern, the brightness is getting darker toward the center.

13. A specific brightness of one color is not clear.

Ⅳ

Ⅳ. Non-picture defect diag nosis

ⅣⅣ

!

!. One Point Service Guide(42 Inch, 40 Inch)

!!

Ⅰ

Ⅰ.

. Usage/Service points to be concerned

ⅠⅠ

Usage/Service points to be concerned

. .

Usage/Service points to be concernedUsage/Service points to be concerned

Color PDP is a display device consisting of Panel section & Drive section. Panel section is composed of electrode, fluorescent substances ,dielectrics and gases, and drive section is a combination of electrical circuit section and PCB section. We call this concrete as PDP Module Ass’y and the following shows warning.

SUGGGESTIONS

1. Static precaution Drive section circuit is C-MOS circuit, so to protect against static electricity, wear static-proof wrist band.

2. Cleaning

when wiping panel, do not use liquid cleaner or other chemicals . Use a damp cloth for cleaning .

3. handling Color PDP uses high voltage(Max.500V). Be aware of electronic shock when handling PDP Unit and don’t touch drive circuit. and even driver circuit’s capacitor is turned off but charge still remains there, so to touch drive circuit, be sure to wait at least 1 minute.

4. Warning when connecting signal & Power Connector in operation do not touch connector while Color PDP is operating.

5. PDP servicing and guarantee Glass Panel and Drive Circuit section are linked and operating together.

if you disassemble and assemble the product in your own hands , LGE is exempted from the guarantee of function, quality and etc.

6. Damage in still image Color PDP uses fluorescent material. The quality of PDP fluorescence by nature becomes deteriorated if using it in the same condition of CRT. To prevent this symptom, input full-screen regularly or use screensaver software.

So do not display the still image for a long time.

7. Temperature & ventilation

Color PDP’s Glass Panel section and Drive circuit section emit the heat so the temperature shall be kept under 40.

the temperature of glass panel section is pretty high because built-in drive circuit emits the heat. PDP is operating with high voltage therefore be sure to keep it away from conductive objects.

8. Warning when handling Module

be aware that PDP shall not be touched by metal or hard objects and shocked by the heat or mechanical force. be careful when disassembling or handling. be sure to wear glove for preventing injury when the glass’s broken.

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Service warning

1. When inserting parts or PCB, fasten the lead line to terminal before soldering.

2. When inserting high- voltage resistance(metal oxide film resistance or metal film resistance), keep 10mm away from PCB

3. High-voltage or high-temperature parts shall be away from the lead line.

4. This chassis is insulation(cold) chassis but for safety, it is better to use insulation trance. when servicing power board, be sure to use insulation trance.

5. While PDP Module is in operati o n, d o not co nn ect or remov e li n es.

"

" With COF or panel defect, report it to LGE PDP module service department.

""

Defect diagnosis tool

1. One DVM ( FLUKE 87 or similar type )

2. Digital Oscilloscope ( over 200MHZ )

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693.5

693.5693.5

635

635635

#259

#259#259

#056

#056#056

Power : 220V 60Hz

Power : 220V 60HzPower : 220V 60Hz

Power consumption : 340W

Power consumption : 340WPower consumption : 340W

MN

MN----42PZ10 Spec & Features

MNMN

42PZ10 Spec & Features

42PZ10 Spec & Features42PZ10 Spec & Features

9#.5

9#.59#.5

82

8282

220

220220

aspect ratio: #6:9

aspect ratio: #6:9 aspect ratio: #6:9 screen size (H X V) : 920.# X 5#8.4mm

screen size (H X V) : 920.# X 5#8.4mm

screen size (H X V) : 920.# X 5#8.4mmscreen size (H X V) : 920.# X 5#8.4mm

resolution : 852 X 480 (VGA)

resolution : 852 X 480 (VGA)resolution : 852 X 480 (VGA)

Cell Pitch (H X V) : 0.36 X #.08

Cell Pitch (H X V) : 0.36 X #.08Cell Pitch (H X V) : 0.36 X #.08 displayable colors (R,G,B) : #,677K (256 X 256 X 256)

displayable colors (R,G,B) : #,677K (256 X 256 X 256)

displayable colors (R,G,B) : #,677K (256 X 256 X 256)displayable colors (R,G,B) : #,677K (256 X 256 X 256) brightness : 250

brightness : 250 cd

brightness : 250 brightness : 250

contrast ratio : 250:# (w/o filter ; 700:# )

contrast ratio : 250:# (w/o filter ; 700:# )contrast ratio : 250:# (w/o filter ; 700:# )

cd////$$$$ (w/o filter : 550

(w/o filter : 550 cd

cdcd

(w/o filter : 550 (w/o filter : 550

cd////$$$$ ))))

cdcd

779.5

779.5779.5

#379

#379#379

color temperature : over 8500

color temperature : over 8500%%%% K

color temperature : over 8500color temperature : over 8500

viewing angle : over #60

viewing angle : over #60%%%%

viewing angle : over #60viewing angle : over #60

input signal : NTSC, HD, VGA ,SVGA

input signal : NTSC, HD, VGA ,SVGAinput signal : NTSC, HD, VGA ,SVGA

Twin Picture : PC/AV

Twin Picture : PC/AVTwin Picture : PC/AV PC input : D

PC input : D----SUB #5

PC input : DPC input : D Control : D

Control : D----SUB25 / STB connection

Control : DControl : D Video input : CVBS

Video input : CVBS

Video input : CVBSVideo input : CVBS

SUB #5

SUB #5SUB #5

SUB25 / STB connection

SUB25 / STB connectionSUB25 / STB connection

K

K K

##4.8

##4.8##4.8

28#

28#28#

SSSS----Video input

Video input

Video inputVideo input

DVD input(Y,

DVD input(Y,Cb

DVD input(Y,DVD input(Y, Audio input : R/L

Audio input : R/L

Audio input : R/LAudio input : R/L

Power Cable : 3

Power Cable : 3&&&& ((((Ground terminal)

Power Cable : 3Power Cable : 3 Sound Output (Speaker) : R.L Out

Sound Output (Speaker) : R.L Out

Sound Output (Speaker) : R.L OutSound Output (Speaker) : R.L Out R,G,B input : D

R,G,B input : D----SUB25 (RGBHV) : STB connection

R,G,B input : DR,G,B input : D

AC Input : 220V 60Hz

AC Input : 220V 60HzAC Input : 220V 60Hz

Cb,Cr)/R,L : Y/Y.

,Cr)/R,L : Y/Y. Pb

CbCb

,Cr)/R,L : Y/Y. ,Cr)/R,L : Y/Y.

Ground terminal)

Ground terminal)Ground terminal)

SUB25 (RGBHV) : STB connection

SUB25 (RGBHV) : STB connectionSUB25 (RGBHV) : STB connection

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Pb////Cb

Cb, Pr/Cr+R/L

PbPb

, Pr/Cr+R/L

CbCb

, Pr/Cr+R/L, Pr/Cr+R/L

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Spec of Models

Spec of ModelsSpec of Models

MN-42PZ10(42”W PDP MNT)

Market : Korea / N_ America / S_America

Market : Korea / N_ America / S_AmericaMarket : Korea / N_ America / S_America

(200#. July ~)

(200#. July ~)(200#. July ~)

((((Example of Desk Top Type)

Example of Desk Top Type)

Example of Desk Top Type)Example of Desk Top Type)

RN

RN----BA##(3 System Multi STB)

BA##(3 System Multi STB)

RNRN

BA##(3 System Multi STB)BA##(3 System Multi STB)

430(W)X78(H)X280mm(D)

ITEMS SPECIFICATIONS(Tentative)

Screen Size: 42 inch/ 106cm diagonal Aspect Ratio: 16 :9 (width:height) Resolution: 852 x 480 Pixels(SD grade) Peak Brightness : typ.240cd/m² (with filter 60%) Contrast Ratio: 700:1(Dark Room & with filter 45%) Viewing Angle: 160° horizontally and vertically Displayable Colors: 16.7 million Weight: kg (MNT), kg(D/stand), kg(spk.)x2 Life: >25,000 hours

(elapsed time to 50% of initial brightness)

Dimensions(MNT) : 105.6cm wide, 63.4cm high, 8.2cm deep Input Terminals : RF terminal(PAL/SECAM/NTSC)

(Set Top Box) Composite Video input(RCA) X 2, S-Video

Audio L&R input(RCA) X 2 Component Video (Y,Pb,Pr) + R/L for DVD Component Video (Y,Pb,Pr)+ R/L for HDTV Stb. RGB-SUB 15 pin for HDTV Stb.(480p/720p/1080i) Analog RGB-SUB 15pin(PC VGA ~SVGA) Stereo Input for PC Audio

Output Terminals : Analog RGB-SUB 15 pin(PC/DTV input bypass)

(Set Top Box) Audio L&R(RCA)

RGB-SUB 25 Pin for MNT(RGB/HV in & Control) Composite Video output + R/L output

Input Terminals : Analog RGB-SUB 15 pin (Compatible with PC

(MNT) VGA ~SVGA, Compressed XGA)

RGB-SUB 25 Pin for STB(RGB/HV in & Control) Component Video (Y,Pb,Pr) for DVD & DTV Stb. Composite Video input(PAL/SECAM/NTSC) Audio L&R input(RCA)X2

Display Frequency : 15.73kHz to 60kHz horizontally, 50Hz to 75Hz(V) Picture : PIP(2Tuner:STB), Twin Picture, Digital Comb filter,

Digital Video Enhancer(Jagging free )

Sound : A2 stereo, AVL, Dolby Virtual, 2x10Wrms Remote Control : Included(Unified) External Control : D-sub 25-pin connector Power Source : 110-240V , 50/60 Hz Power Consumption: 300 watts( with Max. Audio : 320W)

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SET TOP BOX

SET TOP BOX Compatible Model

SET TOP BOX SET TOP BOX

DIGITAL SET TOP BOX ( SK

DIGITAL SET TOP BOX ( SK----0#0T )

DIGITAL SET TOP BOX ( SKDIGITAL SET TOP BOX ( SK

DIGITAL SET TOP BOX ( SK

DIGITAL SET TOP BOX ( SK----0##T )

DIGITAL SET TOP BOX ( SKDIGITAL SET TOP BOX ( SK

0#0T )

0#0T )0#0T )

0##T )

0##T )0##T )

PDP STB type & compatible model

PDP STB type & compatible modelPDP STB type & compatible model

Compatible Model

Compatible Model Compatible Model

MN

MN----40X3M , MN

40X3M , MN----40PA#0, MN

MNMN

40X3M , MN40X3M , MN

all Model can be connected but because of noise problem with int

all Model can be connected but because of noise problem with internal

all Model can be connected but because of noise problem with intall Model can be connected but because of noise problem with int

fan, it is terminated.Be sure that MN

fan, it is terminated.Be sure that MN----40X3M is not compatible with SK

fan, it is terminated.Be sure that MNfan, it is terminated.Be sure that MN

Separately : dedicated cable (AP

Separately : dedicated cable (AP----EA#0)

Separately : dedicated cable (APSeparately : dedicated cable (AP

MN

MN----40PA#0, MN

40PA#0, MN----40PA#0A, MN

MNMN

40PA#0, MN40PA#0, MN

All but MN

All but MN----40X3M can be used

All but MNAll but MN

separately : dedicated cable (AP

separately : dedicated cable (AP----EA#0)

separately : dedicated cable (APseparately : dedicated cable (AP

40X3M can be used

40X3M can be used40X3M can be used

40PA#0, MN----40PA#0A, MN

40PA#0, MN40PA#0, MN

40PA#0A, MN----42PZ#0, MN

40PA#0A, MN40PA#0A, MN

40PA#0A, MN----42PZ#0, MN

40PA#0A, MN40PA#0A, MN

40X3M is not compatible with SK----0##T

40X3M is not compatible with SK40X3M is not compatible with SK

EA#0)

EA#0)EA#0)

42PZ#0, MN----60PZ#0

42PZ#0, MN42PZ#0, MN

EA#0)

EA#0)EA#0)

42PZ#0, MN----60PZ#0

42PZ#0, MN42PZ#0, MN

60PZ#0

60PZ#060PZ#0

60PZ#0

60PZ#060PZ#0

ernal

ernalernal

0##T

0##T 0##T

ANALOG SET TOP BOX ( RN

ANALOG SET TOP BOX ( RN----BA#0 )

ANALOG SET TOP BOX ( RNANALOG SET TOP BOX ( RN

ANALOG SET TOP BOX ( RN

ANALOG SET TOP BOX ( RN----BA## )

ANALOG SET TOP BOX ( RNANALOG SET TOP BOX ( RN

BA#0 )

BA#0 )BA#0 )

BA## )

BA## )BA## )

MN

MN----40PA#0, MN

40PA#0, MN----40PA#0A only

MNMN

40PA#0, MN40PA#0, MN

Only related model can be used.

Only related model can be used.Only related model can be used.

MN

MN----42PZ#0 only

42PZ#0 only

MNMN

42PZ#0 only42PZ#0 only

Only related model can be used

Only related model can be usedOnly related model can be used

40PA#0A only

40PA#0A only40PA#0A only

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Ⅱ

Ⅱ.... Module diagram & spec

ⅡⅡ

Module diagram & spec

Module diagram & specModule diagram & spec

P3 P2

P5

P4

ZCNT TOP B/D ASSY

Label

P300

Y DRV Upper B/D ASSYY DRV Lower B/D ASSY

Y SUS B/D ASSY CTRL B/D ASSY

VR2 VR1

P6

P1

X LEFT B/D ASS’Y

YDRV B/D ASSY

5XT5 R )'4(C 'B45(CO))5CTIO)

5XT5 R )'4(C 'B45(CO))5CTIO)5XT5R)'4(C 'B45(CO))5CTIO)

,+../,-+* 0upp7y(08g.a7

P1~P2[X(B23] 5V,(15V,(V' P3[Y(SUS(B23] VSC,(VS5TUP P2[Y(SUS(B23] 5V,(15V,(VS P1[Z(SUS(B23] 5V,(15V,(VS P300[CTR4(B23] 5V P100[CTR4(B23] ((((((((((((VI35O(SI6)'4

P100

X RIGHT B/D ASSY

ZSUS B/D ASSY

P1

P2

ZCNT BOTTOM B/D ASSY

P'RT()O. p*+du,-(.am/0-a.da*d

1 6871QTH003B PWB(PCB)('SSY ZC)T(TOP(B23('SSY

26871QZH002B PWB(PCB)('SSY ZSUS(B23('SSY( 36871QTH004B PWB(PCB)('SSY ZC)T(BOTTOM(B23('SSY( 46871Q4H012' PWB(PCB)('SSY X(45FT(BOTTOM(B23('SSY 56871QRH010' PWB(PCB)('SSY X(RI6HT(BOTTOM(B23('SSY 66871Q3P016B PWB(PCB)('SSY Y3RV(Upp/*(B23('SSY( 76871Q3P017B PWB(PCB)('SSY Y3RV(4+w/*(B23('SSY( 86871QYH015' PWB(PCB)('SSY YSUS(B23('SSY(

VR1

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YY

Y-

Y

--

- Drive

DriveDrive

Drive

YY

Y-

Y

--

- Drive

DriveDrive

Drive

YYYY----Board

Board

BoardBoard

X

X – Board ( L )

X X

Controller

ControllerController

Board ( L )

Board ( L )Board ( L )

Board

BoardBoard

VSC

VSCVSC

Board

BoardBoard

POWER

POWERPOWER

Board

BoardBoard

CN#

CN#C N#

CN2

CN2C N2

EMI Filter

EMI FilterEMI Filter

X

X – Board ( R )

Board ( R )

X X

Board ( R )Board ( R )

ZZZZ----Board

Board

BoardBoard

Local key

Local keyLocal key

Main Power

Main PowerMain Power

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STB

STBSTB

STB

STBSTB

PC

PCPC

PC

PCPC

LA7222

LA7222LA7222

LA7222

LA7222LA7222

LA4282

LA4282LA4282

LA4282

LA4282LA4282

CXA2022S

CXA2022SCXA2022S

CXA2022S

CXA2022SCXA2022S

MICOM

MICOMMICOM

CXP7500#0

CXP7500#0CXP7500#0

Monitor Block diagram

Monitor Block diagramMonitor Block diagram

2222MMMM----SDRAM

SDRAM

SDRAMSDRAM

2222MMMM----SDRAM

SDRAM

SDRAMSDRAM

Buffer

BufferBuffer

Buffer

MX88L284

MX88L284MX88L284

MX88L284

MX88L284MX88L284

BufferBuffer

HC54#

HC54#HC54#

HC54#

HC54#HC54#

PDP MPDULEPDP MPDULE

PDP MPDULE

Video

VideoVideo

Video

VideoVideo

DVD

DVDDVD

DVD

DVDDVD

VPC3230

VPC3230VPC3230

VPC3230

VPC3230VPC3230

SDA94#0

SDA94#0SDA94#0

SDA94#0

SDA94#0SDA94#0

CXA2#0#

CXA2#0#CXA2#0#

CXA2#0#

CXA2#0#CXA2#0#

HC74

HC74HC74

HC74

HC74HC74

THS8083

THS8083THS8083

THS8083

THS8083THS8083

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MN-42PZ10 VSC(JAG200 & FLI2200) Block Diagram

CVBS

YCbCr/

YPbPr

RGBHV

5

RGBHV

5

YUV

2

VIDEO

SWITCH

(M52758FP)

COLOR DECODER

(VPC3230D)

3 H/V

SOG

H/V/

FIELD/

LLC1

4

3RGB

DEINTERLACE

(FLI2200)

MEMORY

(4M-BYTE)

MONOSTALE MULTIBIB.

SOG_OUT

A/D CONVERTER

(CXA3516R)

H

ENHANCER

(FLI2220)

2H/V

CLAMP_AD

3RGB

5

H/V/CLK/

HBLK/VBLK

5Y,U,V,H,V

MEMORY (6M-B YTE )

2PLLH/CLK

5

RGBHV

COLOR CONTROL

SCALER

(JAG200)

&

VIDEO SWITCH

(CXA2101Q)

Buffer

(74F574 x 4)

4

H/V/DE/CLK

V

H

2H/V

H V

Clamp

(GEN. CLAMP)

DISP_EN

EPLD

41P

8

R

AUDIO AMP

LA4282(L&R)

L

AUDIO

Sound

Processor

(MSP3401G)

3Y,Pb,Pr(MNT)

Y,Pb,Pr(STB)

(74HCT373)

ROM

(AT29C010)

3

PORT EXP

MICOM

(M62320X3)

EEPROM

X2416P

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PC

TUNER.1

TUNER.2

TV (M)

L/R(tv)

TV (S)

RN-BA11(Tuner Receiver) Block - Diagram

L / R

2’nd SiF

L/R

L/R(tv)

MSP3401G

Sound

Processor

RGB(PC)

M52758FP

RGB/YUV

S/W

RGB (DTV)

Ro

Lo

S-VHS

==== AUDIO >?

9:;<

9:;<1

9:;<9:;<

9:;<

9:;<2

9:;<9:;<

>?

>?>?

MNT_OUT

DVD/DTV

(RCA JACK)

Y / C

V, L/R

CXA2069Q

A/V SW

CVBS

Y/C

OPTION

Y/C

CVBS

Y/C

DVD_Y

Y,Cr,Cb (DVD)

DCF

VPC3230D

(MAIN)

Vido

Proessor

VPC3230D

(SUB) Video

Proessor

WE

RE

Y,Pb,Pr(DTV)

MS81V04160

FRAME

MEMORY

M52756FP

RGB/YUV

S/W

RGB(OSD)

LGTV1001

DRP

CXA2119M

S/W

+

RGB

YUV

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Product back & monitor in/output section

Product back & monitor in/output sectionProduct back & monitor in/output section

Connecting 25 Pin cable

Connecting 25 Pin cableConnecting 25 Pin cable

(when connecting 25 Pin cable,

(when connecting 25 Pin cable,(when connecting 25 Pin cable, Connect external equipment to STB)

Connect external equipment to STB)

Connect external equipment to STB)Connect external equipment to STB)

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YYYY----Drive (TOP)

Drive (TOP)

Drive (TOP)Drive (TOP)

Controller Board

Controller BoardController Board

Connection diagram (back cover

Connection diagram (back cover’s open)

Connection diagram (back coverConnection diagram (back cover

ZZZZ----Board

Board

BoardBoard

Power Board

Power BoardPower Board

VSC Board

VSC BoardVSC Board

s open)

s open)s open)

YYYY----Board

Board

BoardBoard

YYYY----Drive (Bottom)

Drive (Bottom)

Drive (Bottom)Drive (Bottom)

EMI Filter

EMI FilterEMI Filter

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Exploded view (Back Cover, VSC, EMI, Power )

Exploded view (Back Cover, VSC, EMI, Power )Exploded view (Back Cover, VSC, EMI, Power )

VSC BOARDEMI Filter

VSC BOARDVSC BOARD

EMI Filter

EMI FilterEMI Filter

POWER BOARD

POWER BOARDVSC BOARD

POWER BOARDPOWER BOARD

BACK COVER

BACK COVERBACK COVER

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PANEL

PANELPANEL

CONTROL

CONTROLCONTROL

BOARD

BOARDBOARD

Exploded view (Module)

Exploded view (Module)Exploded view (Module)

ZZZZ----BOARD

BOARD

BOARDBOARD

YYYY----Drive BOARD

Drive BOARD

Drive BOARDDrive BOARD

YYYY----Drive BOARD

Drive BOARD

Drive BOARDDrive BOARD

YYYY----BOARD

BOARD

BOARDBOARD

XXXX----BOARD

BOARD

BOARDBOARD

BOARD

BOARDBOARD

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Drive Board (Top)

Drive Board (Top)Drive Board (Top)

Board Control Board(Back)

BoardBoard

Control Board(Back)YYYY----Drive Board (Top)

Control Board(Back)Control Board(Back)

Parts (back covers open)

Parts (back covers open)Parts (back covers open)

Power Board

Power Board ZZZZ----Board

Power BoardPower Board

BoardYYYY----Board

BoardBoard

YYYY----3*8v/(B+a*d

3*8v/(B+a*d

3*8v/(B+a*d3*8v/(B+a*d

VSC Board(Front)

VSC Board(Front)VSC Board(Front)

EMI Filter

EMI FilterEMI Filter

Main Power

Main Power Main Power Switch

Switch

SwitchSwitch

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Drive Board

Drive BoardDrive Board

BoardYYYY----Drive Board

BoardBoard

EMI Filter & VSC Board are separated

EMI Filter & VSC Board are separatedEMI Filter & VSC Board are separated

Control Board

Control Board ZZZZ----Board

Control BoardControl Board

BoardYYYY----Board

BoardBoard

XXXX----Board ( Left )

Board ( Left )

Board ( Left )Board ( Left )

XXXX----Board ( Right)

Board ( Right)

Board ( Right) Board ( Right)

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Power Board ( SMPS )

Power Board ( SMPS )Power Board ( SMPS )

Power well power Board-Korean market Murata Power Board

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Ⅲ

Ⅲ.... Screen defect diagnosis

ⅢⅢ

1. The 4/7 or 3/7 of screen is not displayed.

1) Check the X B/D power connector.

2) Check the connector between CTRL B/D and X B/D.

3) Replace the X B/D.

"

" relations between screen and X B/D

""

screen X B/D

left 4/7 of screen ↔ Right X B/D

right 3/7 of screen ↔ Left X B/D

"

" type

""

i) screen’s left(4/7)

ii) Screen’s right(3/7)

Displaying part Non-displaying part

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2. No image by Data COF. (the case one Data COF is totally or partially not displayed included)

1) It is mainly caused by related Data COF and X B/D connection error.

2) Check the connector between that Data COF & X B/D.

3) When Data COF has a defect, replace the related X B/D.

"

" examples of screen display type

""

( beside the below, any out of 7 Data COF can be occurred. )

ok partially displaying

Non-image

"

" Data COF IC test method

""

②

resistance

Set ① pattern( GND ) to ANODE, ② Pattern (resistance joint part ) to CATHOD, Test diode forward and backward. Measure @ resistance value.(10A)

① GND

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3. Data COF IC unit error

1) As pictures below, this is caused by the clock error of Data COF IC

2) With <case 1>, <case 2>, <case 3>, check Data COF connector and replace the X B/D.

3) With <case 4>, <case 5>, check the connector between CTRL B/D & X B/D and replace X B/D or CTRL B/D.

"

" Cases

""

One IC error in one COF

Two every-second IC error in one

4 IC errors in one COF

Data COF IC unit error in the whole X B/D

Data COF IC unit error in the whole screen.

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4. Regular vertical line with one or more Data COF IC

1) Regular vertical line with one Data COF IC is mainly caused by X B/D output terminal buffer’s output error. When two Data COF ICs have regular vertical lines, it means the data transfer from Controller B/D to X B/D has an error.

2) Check the related X B/D connector.

3) Replace that X B/D or CTRL B/D

"

" relation between screen & X B/D

""

screen X B/D

left 4/7 of bottom screen ↔ Right X B/D

right 3/7 of bottom screen ↔ Left X B/D

"

" case

""

Partial error or total error with One or more ICs defect.

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5. The screen by Scan FFC is not displayed

1) It is mainly caused by the bad connection between Scan FFC & Y B/D.

2) Check the related connector between Scan COF & Y B/D.

3) When Scan IC has a defect, replace the related Y DRV B/D.

"

" case

""

"

" SCAN IC check

""

1/8 of the screen

B B B

OK

total or partial non- image

Set Vpp Pin to ANODE, GND pin to CATHOD and test diode forward and backward.

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6. Regular vertical lines in the whole screen. (mainly in one specific color, regular line is flicking)

1) This problem is related to CONTROL B/D.

2) Replace CONTROL B/D

"

"case

""

Regular vertical lines in the whole screen

7. Vertical Dat a copy

1) It possibly happens when scan wave does not form properly.

2) Replace Y DRVB/D or Y SUS B/D

"

" case

""

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8. One or more vertical lines in th e screen.

1) Irregular vertical line is not related to Controller B/D or X B/D.

2) It is mainly caused by the followings open(or short).

- Panel itself defect

- DATA COF FPC attached to panel is open or short.

- DATA COF attached to panel itself defect

3) Replace module

"

" case

""

9. One or more horizontal lines in the screen.

1) Irregular borizontal line is not related to Controller B/D or Y B/D.

2) It is mainly caused by the followings open(or short).

- Panel itself defect

- SCAN FPC attached to panel is open or short.

- SCAN IC attached to panel itself defect

There are several types. Several lines in ¼ area. It can be seen on the both side, right and left. The area is sometimes over ¼.

3) Replace Y DRV B/D

"

" case

""

Not always like this. There can be several horizontal lines

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10. Input signal pattern is displayed but the whole brightness of the screen is dark.

1) It happens when Z B/D is not operating well.

2) Check whether Z B/D’s power connector is plugged .

3) Check whether the connector between Controller B/D & Z B/D is plugged.

4) Replace Controller B/D or Z B/D.

11. In full white pattern, foreign color is displayed or in full black pattern, mis-discharge is partially occurred.

1) Check the slope of Y B/D set up, set down waveform.

2) Check the slope of Z B/D’s ramp waveform

3) Measure each B/D’s output waveform by over 200MHz oscilloscope and compare it to the below picture. it is possible to control Y B/D’s setup slope by adjustinng VR2, setdown slope by VR1 and Z B/D’s ramp slope by VR1..

- Y B/D measurement point : TP ( Connector P4 36 pin )

- Z B/D measurement point : panel connection part ( SUS_OUT )

230V

Vsetup

175V

0V

Vs

setup

25µs

setdown

230µs

Y output voltage wave

175V

Vs

15µs

20µs

Z RAMP voltage wave

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12. In full white pattern, the brightness is getting darker toward the center.

1) It happens with Z B/D’s ramp waveform

2) Check the connection between CTRL B/D and Z B/D’s connection cable.

3) Replace Z B/D.

"

" case

""

13. A specific brightness of one color is not clear.

1) Check CTRL B/D’s input signal connector.

2) Replace CTRL B/D.

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ⅣⅣⅣⅣ.

. Non

Non----picture

. .

NonNon

picture Defect diagnosis.

picturepicture

Defect diagnosis.

Defect diagnosis.Defect diagnosis.

Non- image or same symptom when power off or black pattern.

1) Check CTRL B/D’s LED(D1~D4).

2) Check the power or signal cable input into CTRL B/D.

3) Check X B/D, Y B/D and Z B/D’s power connector.

4) Check the connector between CTRL B/D and X B/D, Y B/D, Z B/D respectively.

5) Measure each X, Y, Z B/D’s output waveform with over 200MHz oscilloscope and compare it to the below picture to detect the defect and replace that.

- Y B/D measurement point : TP ( Connector P4 36 pin )

- Z B/D measurement point : panel connection part ( SUS_OUT )

- X B/D measurement point : L1(RIGHT), L2(LEFT BOTTOM)

6)Test scan(Y) IC.

7)Test data(X) COF IC

8)Replace CTRL B/D.

1Frame(16.7ms)

5) Test scan(Y) IC.

6) Test data(X) COF IC.

7) Replace CTRL B/D.

< A: Y B/D output waveform - 1 FRAME >

< B: Y B/D output waveform - 1 SF >

< B: Y B/D output waveform - 2 SF(non-Setup SF) >

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< A: Y B/D output waveform - 1Frame >

< B: Y B/D output waveform - 7~12 SF(SE) >

< A: Z B/D output waveform - 1Frame >

< B: Z B/D output waveform - 1SF >

< X B/D output waveform - 1 FRAME >

< X B/D output waveform - 1 SF >

< X B/D output waveform - amplification >

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ⅤⅤⅤⅤ.

. One Point Service Guide

One Point Service Guide

. .

One Point Service GuideOne Point Service Guide

PDP Flicker and

42

4242

42

4242

PDP Flicker and

”

PDP Flicker and PDP Flicker and

PDP Flicker and

”

PDP Flicker and PDP Flicker and

No Raster Troubleshooting

No Raster TroubleshootingNo Raster Troubleshooting

No Raster Troubleshooting

No Raster TroubleshootingNo Raster Troubleshooting

P6

P4

Guide

GuideGuide

Guide

GuideGuide

42

42 Inch

Inch

42 42

InchInch

cause : bad connection between

Y-Board

# 1, 2 drive board Connector pin

Rework should be done

Y-Board

Y-Driver Board

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D

P 6

C

D

amplified

D

C : outside Leg D : inside Leg

•P 6, P 4 both are the first pin, when wiring, it should be done as picture shown.

(bend the wire to Y-Driver B/D not

to Y-B/D . If not there can be noise)

•Don’t be confused with Pin number

•Improved since Dec,2001.

C

P 4

C

D

C

amplified

C

D

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D

C

D

C

Be sure not to misconnect the line.

Be sure not to misconnect the line.Be sure not to misconnect the line. See the picture precisely and then connect jump wire at the exac

See the picture precisely and then connect jump wire at the exact point

See the picture precisely and then connect jump wire at the exacSee the picture precisely and then connect jump wire at the exac

t point

t pointt point

D

C

LG Electronics/DND QA

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Gr

GrGr

Intermittent no

Intermittent no----image/image error while watching

Intermittent noIntermittent no

image/image error while watching

image/image error while watchingimage/image error while watching

CANVAS

X

The screen is intermittently disappeared . LED is green

The screen is intermittently disappeared . LED is greenThe screen is intermittently disappeared . LED is green

cause : bad connection between Y

cause : bad connection between Y----Board and ##, 2 pin of

cause : bad connection between Ycause : bad connection between Y

YYYY----Drive Board Connector

Drive Board Connector

Drive Board Connector Drive Board Connector

Board and ##, 2 pin of

Board and ##, 2 pin ofBoard and ##, 2 pin of

CAVBAS

X

screen is distorted

screen is distorted weiderly

screen is distorted screen is distorted

CANVAS

X

weiderly (happened 2 a day)

weiderlyweiderly

(happened 2 a day)

(happened 2 a day)(happened 2 a day)

troubleshooting : connect bad linking between Y

troubleshooting : connect bad linking between Y----Board &

troubleshooting : connect bad linking between Ytroubleshooting : connect bad linking between Y YYYY----Drive with jump wire (all 4 parts)

Drive with jump wire (all 4 parts)

Drive with jump wire (all 4 parts)Drive with jump wire (all 4 parts)

see working instruction(revised since Dec,200#. #)

see working instruction(revised since Dec,200#. #)see working instruction(revised since Dec,200#. #)

Board &

Board & Board &

normal

normalnormal

LG Electronics/DND QA

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Gr

GrGr

No Power

No PowerNo Power

CANVAS

X

No Power

No Power No Power

( in ST

( in ST----BY mode, but no LED)

( in ST( in ST

Check the power supply & main power S/W on

Check the power supply & main power S/W onCheck the power supply & main power S/W on

BY mode, but no LED)

BY mode, but no LED)BY mode, but no LED)

CANVAS

X

normal

normalnormal

Check EMI board fuse (check the rated capacity )

Check EMI board fuse (check the rated capacity )Check EMI board fuse (check the rated capacity )

Be sure to use rated fuse.

Be sure to use rated fuse.Be sure to use rated fuse.

Fuse #5 A

Fuse #5 AFuse #5 A

LG Electronics/DND QA

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GrGr

No Raster

No RasterNo Raster

CAVBAS

X

when Power

when Power’s on, after 2 ~ 3 sec, it

when Powerwhen Power

( LED changing green into red )

( LED changing green into red )( LED changing green into red )

CHECK : remove STB and operate monitor individually.

CHECK : remove STB and operate monitor individually.CHECK : remove STB and operate monitor individually.

(check STB defect or Monitor defect )

(check STB defect or Monitor defect )(check STB defect or Monitor defect )

s on, after 2 ~ 3 sec, it’s off

s on, after 2 ~ 3 sec, its on, after 2 ~ 3 sec, it

s off

s offs off

CANVAS

X

normal

normalnormal

When using ANALOG STB, check STB only

When using ANALOG STB, check STB onlyWhen using ANALOG STB, check STB only

MN

MN----42PZ#0 only STB : RN

42PZ#0 only STB : RN----BA##

MNMN

42PZ#0 only STB : RN42PZ#0 only STB : RN

Remove each Board

Remove each Board’s power supply connector and check the power is off.

Remove each BoardRemove each Board When the power is not off,replace the related board.

When the power is not off,replace the related board.

When the power is not off,replace the related board.When the power is not off,replace the related board.

s power supply connector and check the power is off.

s power supply connector and check the power is off.s power supply connector and check the power is off.

BA##

BA##BA##

LG Electronics/DND QA

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LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

CANVAS

X

no picture (LED

no picture (LED’s green)

no picture (LEDno picture (LED

s green)

s green)s green)

CANVAS

X

normal

normalnormal

No Picture

No PictureNo Picture

Core checkpoint : remove STB and operate monitor individually.

Core checkpoint : remove STB and operate monitor individually.Core checkpoint : remove STB and operate monitor individually.

(check whether

(check whether STB

(check whether (check whether

With monitor defect, check VSC and then

With monitor defect, check VSC and then Controller Board.

With monitor defect, check VSC and thenWith monitor defect, check VSC and then

Troubleshooting : replace VSC Board

Troubleshooting : replace VSC Board Troubleshooting : replace VSC Board

STB’s

s a defect or monitor

STBSTB

a defect or monitor’s one)

s s

a defect or monitora defect or monitor

s one)

s one)s one)

Controller Board.

Controller Board.Controller Board.

LG Electronics/DND QA

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LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

Address Bar ( Horizontal Bar )

Address Bar ( Horizontal Bar )Address Bar ( Horizontal Bar )

CANVAS

X

no image (LED

no image (LED’s green)

no image (LEDno image (LED

s green)

s green)s green)

CANVAS

X

normal

normalnormal

Cause : Y

Cause : Y----Drive ( Bottom ) defect

Cause : YCause : Y

Troubleshooting : Y

Troubleshooting : Y----Drive (lower part) replacement

Troubleshooting : YTroubleshooting : Y

This problem is shown in the bottom of screen,

This problem is shown in the bottom of screen,This problem is shown in the bottom of screen, So it is caused by Y

So it is caused by Y----Drive

So it is caused by YSo it is caused by Y

Drive ( Bottom ) defect

Drive ( Bottom ) defectDrive ( Bottom ) defect

Drive (lower part) replacement

Drive (lower part) replacement Drive (lower part) replacement

Drive

Drive Drive

YYYY----Drive Board ( Bottom )

Drive Board ( Bottom )

Drive Board ( Bottom )Drive Board ( Bottom )

LG Electronics/DND QA

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LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

Address Bar ( Horizontal Bar )

Address Bar ( Horizontal Bar )Address Bar ( Horizontal Bar )

CANVAS

X

no image (LED

no image (LED’s green)

no image (LEDno image (LED

Cause : Y

Cause : Y----Drive Board (upper part) defect

Cause : YCause : Y

Drive Board (upper part) defect

Drive Board (upper part) defectDrive Board (upper part) defect

s green)

s green)s green)

CANVAS

X

normal

normalnormal

YYYY----Drive Board ( Top )

Drive Board ( Top )

Drive Board ( Top )Drive Board ( Top )

Troubleshooting : Y

Troubleshooting : Y----Drive Board replacement

Troubleshooting : YTroubleshooting : Y

Drive Board replacement

Drive Board replacementDrive Board replacement

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

CANVAS

X

no image (LED

no image (LED’s green)

no image (LEDno image (LED

s green)

s green)s green)

CANVAS

X

normal

normalnormal

PD50# Connector

PD50# ConnectorPD50# Connector

No Picture

No PictureNo Picture

cause : PD

cause : PD----50# Connector contact point defect

cause : PDcause : PD

troubleshooting : PD

troubleshooting : PD----50# Connector replacement

troubleshooting : PDtroubleshooting : PD

(with PD

(with PD----50# Connector contact point defect,

(with PD(with PD

Various defect symptoms can be seen)

Various defect symptoms can be seen)Various defect symptoms can be seen)

50# Connector contact point defect

50# Connector contact point defect50# Connector contact point defect

50# Connector replacement

50# Connector replacement50# Connector replacement

50# Connector contact point defect,

50# Connector contact point defect,50# Connector contact point defect,

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

High frequency noise (

High frequency noise (“Bee

High frequency noise (High frequency noise (

Bee” sound)

BeeBee

sound)

sound)sound)

CANVAS

X

normal picture with high frequency noise (

normal picture with high frequency noise (“bee

normal picture with high frequency noise (normal picture with high frequency noise (

SMPS is supposed to operate

SMPS is supposed to operateSMPS is supposed to operate with high frequency so

with high frequency so

with high frequency sowith high frequency so small noise is not considered

small noise is not considered

small noise is not considered small noise is not considered as a defect.

as a defect.

as a defect.as a defect.

bee”)

beebee

CANVAS

X

)

))

normal

normalnormal

Power (SMPS) Board

Power (SMPS) BoardPower (SMPS) Board

#. C8#78 0.22

#. C8#78 0.22EEEE/50V add

#. C8#78 0.22#. C8#78 0.22

2. Open C8#39 right lead,

2. Open C8#39 right lead,2. Open C8#39 right lead, and then connect it to

and then connect it to

and then connect it toand then connect it to

R8#64 right lead.

R8#64 right lead.R8#64 right lead.

/50V add

/50V add/50V add

C8#78 0.22uF electrolytic

Improved since Nov,200#

Improved since Nov,200#Improved since Nov,200#

#.

#. Slight noise is not a defect and write down explanation

Slight noise is not a defect and write down explanation

#. #.

Slight noise is not a defect and write down explanationSlight noise is not a defect and write down explanation

capacitor insertion

Open C8#39 right lead and then wire R8#64 right lead

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

No picture in right

No picture in right----2/5 area

No picture in rightNo picture in right

2/5 area

2/5 area2/5 area

CANVAS

X

No picture in the right

No picture in the right----2/5 area

No picture in the rightNo picture in the right

XXXX----Board ( Left ) power supply check

Board ( Left ) power supply check

Board ( Left ) power supply checkBoard ( Left ) power supply check

2/5 area

2/5 area2/5 area

CANVAS

X

normal

normalnormal

XXXX----Board ( Left )Connector check

Board ( Left )Connector check

Board ( Left )Connector checkBoard ( Left )Connector check

XXXX----Board ( Left ) replacement

Board ( Left ) replacement

Board ( Left ) replacementBoard ( Left ) replacement

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

Address Bar (Vertical )

Address Bar (Vertical )Address Bar (Vertical )

CANVAS

X

stripe in right

stripe in right----2/5 area

stripe in rightstripe in right

XXXX----Board ( Left ) power supply check

Board ( Left ) power supply check

Board ( Left ) power supply checkBoard ( Left ) power supply check

XXXX----Board ( Left ) Connector check

Board ( Left ) Connector check

Board ( Left ) Connector checkBoard ( Left ) Connector check

2/5 area

2/5 area2/5 area

CANVAS

X

normal

normalnormal

XXXX----Board ( Left ) replacement

Board ( Left ) replacement

Board ( Left ) replacementBoard ( Left ) replacement

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

No picture in left 3/5 of the screen

No picture in left 3/5 of the screenNo picture in left 3/5 of the screen

CANVAS

X

left 3/5 of screen with vertical stripes

left 3/5 of screen with vertical stripesleft 3/5 of screen with vertical stripes

CANVAS

X

normal

normalnormal

XXXX----Board ( Right ) power supply check

Board ( Right ) power supply check

Board ( Right ) power supply checkBoard ( Right ) power supply check

XXXX----Board ( Right )Connector check

Board ( Right )Connector check

Board ( Right )Connector checkBoard ( Right )Connector check

XXXX----Board ( Right ) replacement

Board ( Right ) replacement

Board ( Right ) replacementBoard ( Right ) replacement

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

Address Bar (Vertical )

Address Bar (Vertical )Address Bar (Vertical )

CANVAS

X

left 3/5 of screen with vertical stripes.

left 3/5 of screen with vertical stripes.left 3/5 of screen with vertical stripes.

CANVAS

X

normal

normalnormal

XXXX----Board ( Right ) power supply check

Board ( Right ) power supply check

Board ( Right ) power supply checkBoard ( Right ) power supply check

XXXX----Board ( Right )Connector check

Board ( Right )Connector check

Board ( Right )Connector checkBoard ( Right )Connector check

XXXX----Board ( Right ) replacement

Board ( Right ) replacement

Board ( Right ) replacementBoard ( Right ) replacement

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

No Red

No RedNo Red

CANVAS

X

no Red ( B or G )

no Red ( B or G )no Red ( B or G )

CANVAS

X

normal

normalnormal

Test Monitor individually.

Test Monitor individually.Test Monitor individually. If detect a problem with monitor, check VSC Board.

If detect a problem with monitor, check VSC Board.

If detect a problem with monitor, check VSC Board.If detect a problem with monitor, check VSC Board.

If it has a problem with STB connecting, focus on 25 Pin.

If it has a problem with STB connecting, focus on 25 Pin.If it has a problem with STB connecting, focus on 25 Pin.

Be sure not to connect 5 Pin (AP

Be sure not to connect 5 Pin (AP----EA#0) by force

Be sure not to connect 5 Pin (APBe sure not to connect 5 Pin (AP

25

25 Pin Cable P/No : GVZ AP

Pin Cable P/No : GVZ AP----EA#0

25 25

Pin Cable P/No : GVZ APPin Cable P/No : GVZ AP

EA#0) by force

EA#0) by forceEA#0) by force

EA#0

EA#0EA#0

Be sure not to bend it by force or internal

Be sure not to bend it by force or internal Be sure not to bend it by force or internal Insulated conductor can be down.

Insulated conductor can be down.

Insulated conductor can be down.Insulated conductor can be down.

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

1) X - Board COF Connector separation

42

42 Inch

Inch

42 42

InchInch

Lift up the right and left of X-BOARD CONNECTOR.

When you handle COF CONNECTOR, don’t pressure. First release LOCK and separate. If COF CONNECTOR is damaged, you should replace MODULE ASS’Y. So, be aware of this!!

Lift up X-BOARD CONNECTOR and separate COP CONNECTOR by pulling up.

COF Connector

Warning

When you exchange X-Board, first you should separate COF

Connector. Be careful to handle it.

COF Connector is attached to Module. When COF Connector is

broken, Module ASS’Y must be replaced a new one.

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

2) X - Board Connector separation

Lift up each edge of left/right. Lifted condition

Be careful to handle LOCK or it can be broken. When LOCK is broken, replace a new X-BOARD.

Warning

It’s easy to separate it by releasing Connector Lock . Do not pressure or it can be hurt.

When LOCK is hurt, replace a new X-BOARD

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

3) Y - Board COF Connector separation

Pull the white LOCK as shown in arrow

Pull the white LOCK as shown in arrow.

Separate COF CONNECTOR by pulling in the left.

Warning

Be careful to handle LOCK and COF Conne ct or. When LOCK pa rt is damaged, you should replace a new Y-Board. In case of COF Connector, Module Assembly.

LG Electronics/DND QA

LG Electronics/DND QA Gr

LG Electronics/DND QA LG Electronics/DND QA

Gr

GrGr

4) Z - Board COF Connector separation

Separate the fixed Screw of Z-Board. Pull out Lock as shown in arrow.

Warning

Be careful not to tear COF Connector. If COF Connector is torn, replace a new Module Assembly

Condition in Lock part is pulled Pull COF Connector as shown in arrow.

COF Connector

It’s easy to separate COF on condition that Z-Board Screw is separated. In case Z-Board is assembled, it’s really hard to separate.

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5) Connector separation Guide

Push LOCK and pull o ut

PUSH

PULL

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6) Control Board & VSC Board Connector

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7) Gas injection (Sealing up) condition

Be sealed up after gas injection

Warning

Be careful to handle the sealed-up part after gas injection. If it is broken, the gas escapes. So, replace the Module.

Be sealed up after gas injectio n

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8) Power off in 2 ~ 3 minutes(Protection)

Power is On and off 2~3 minutes.

(Protection)

P301 Connector Open Check.

P302 Connector Open Check

P303 Connector Open Check

P304 Connector Open Check

P102 Connector Open Check

P3, P2 Connector Open Check

P005, P003 Connector Open Check

OK

X - Board Top Right Change.

OK

X - Board Top Left Change.

OK

X - Board Bottom Right Change.

OK

X - Board Bottom Left Change.

OK

Z - Board Change.

OK

Z - Board Change.

Y - Board Change.

VSC- Board Change.

PROTECT operation;

When the load voltage is short.

When each voltage doesn’t work (in general)

P006 Connector Open Check

Power Board Change

OK

VSC - Board Change.

Sound Output IC Short Check

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9) Power off in 2 ~ 3 minutes(Protection)

L813 Cold Solder

Symptom : As soon as the power on,

it’s off in 2 - 3minutes. (PROTECT operation)

Cause : No VS voltage

L813 Coil cold soldering.

Check

Open the Conne ctor connecting to each Board to check the power is off. if each Board is same, check the Power Board and voltage.

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10) ADD BAR inspection and repair

HEATRUN : WHITE

Press the ADJ KEY and check the position of add bar by changing WHITE or RED or BLUE or GREEN

Top Right Top Left

Bottom Right

Bottom Left

MP-40PA10 uses 4 board such as left,right, top and bottom. Divide the screen in 4 and once you see ADD BAR check COF CONNECTOR between MODULE and X-BOARD. If there is no defect in COF CONNECTOR replace X-BOARD. But the problem still remains and check the connector between X-BOARD and CONTROL BOARD. And if you can’t find defect, check CONTROL.

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11) One Point Service Guide

Symptom : B color 1 Address line Open Cause : Dented COF

COF is dented

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IC14

Symptom : Inferior R Address color Cause : Inferior DATA output by cold soldering 16 pin of IC14 in X-L-TOP

( Normal waveform after tearing off IC Pin)

Countermeasure : Replace X-L-TOP board.

Cold Soldering

Abnorm al waveform by cold soldering

Normal waveform after tearing off IC pin

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Symptom Causes Countermeasure

The blue spreads on the screen (Mis-discharge) and power off in 2 ~ 3 seconds. If you turn on again, it will be same problem.

Check

If 15V line voltage reduces below 14V, Mis-discharge occurs and power off because of protection circuit.

Replace PSU (Power Supply Unit) and defective X-Board.

Defective X-Board

If when Power on, screen shows like above and turn off in 2 seconds, check if turning off or not by disconnecting all X & Y boards.

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Symptom

Cause

Countermeasure

The top left part of screen is broken (Top Right X-BOARD)

Check

Check Top right X-BOARD 5V.(If 0V, it happens)

No 5V supply to Top right X-Board.

Connect 5V line

Check 5V line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

Pinkish screen in the top left. (Top right X-BOARD)

Check

Check Top right X-BOARD Va(70V).(If 0V, it happens)

No Va(70V) supply to Top right X-Board.

Connect 70V line

Check 70V(Va) line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

The 3/5 top left in the screen is blank (Top Right X-BOARD)

Check

Check Top right X-BOARD 12V.( If 0V, it happens )

No 12V supply to Top right X-Board.

No Va(70V) supply to Top right X-Board.

Connect 12V line

Connect 70V line

Check Top right X-BOARD Va(70V).(If 0V, it happens)

Check 12V & 70V(Va) line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

The 3/5 top right of the screen is blank.

(Top left X-BOARD)

Check

Check Top left X-BOARD 12V.( If 0V, it happens )

No 12V supply to Top left X-Board.

No Va(70V) supply to Top left X-Board.

Connect 12V line

Connect 70V line

Check Top left X-BOARD Va(70V).(If 0V, it happens)

Check 12V & Va(70V) line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

P1 COF connector on Top left X-Board is open.

Pinkish screen in the 1/5 top right

(Top left X-BOARD)

Check

Check the contact point and Locking of P1 on Top left X-BOARD.

Reassemble it

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Symptom

Cause

Countermeasure

The 3/5 bottom left of screen is broken.

(BOTTOM RIGHT X-BOARD)

Check

No 5V supply to bottom right X-Board.

Connect 5V line

Check Bottom right X-BOARD 5V.( If 0V, it happens )

Check 5V line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

The 3/5 bottom left of the screen is Blank.

(Bottom Right X-BOARD)

Check

No 12V supply to bottom right X-Board.

No Va(70V) supply to bottom right X-Board.

Connect 12V line

Check Bottom right X-BOARD 12V.( If 0V, it happens )

Check 12V line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

Check

The 2/5 right of the screen is broken.

(Bottom left X-BOARD)

No 5V supply to bottom left X-Board.

Connect 5V line

Check Bottom left X-BOARD 5V.( If 0V, it happens )

Check 5V line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

The 2/5 right part of the screen is blank.

(Bottom left X-BOARD )

Check

No 12V supply to bottom left X-Board.

Connect 12V line

Check Bottom left X-BOARD 12V.( If 0V, it happens )

Check 12V line from SMPS to X-BOARD.

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Symptom

Cause

Countermeasure

ADDRESS bar appears in the right bottom of the screen.

(X-BOARD BOTTOM LEFT)

Check

Check connecting of the connector of bottom left X-BOARD.

The connecting of X-Board bottom left connector is bad.

Reassemble it.

X-BOARD BOTTOM LEFT CONNECTOR OPEN.

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Examples

ExamplesExamples

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Symptom

Cause

Countermeasure

Screen is divided in top and bottom, and vertical bar appears.

Check

P13 CONNECTOR contact point inferior CHECK.

Connector(P13) is OPEN or Connecting condition is bad

Reassemble P13.

P13 CONNECTOR SIGNAL CHEK.

P13 CONNECTOR

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Symptom

Screen is broken and has the vertical/horizontal bar.

Cause

VSC Board Connector is Open. Reassemble VSC Board

Countermeasure

Connector

Check

Check the connector connecting Reassemble the Connector

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Symptom

The screen is bluish(Mosaic screen)

Cause

Loose VSC Board Connector Reassemble VSC BOARD

Countermeasure

Connector

Check

Check the connection condition of the Connector.

Reassemble the Connector.

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Symptom

The mosaic appears in the screen when it connects to VIDEO Input. (The sensibility of Y-signal is low.) When connected to Component Input, it is O.K.

Cause

Bad IC203 Replace IC203(V PC3230D)

Countermeasure

Check

Check if X201 on VSC board oscillates. Check Video In/Out of IC203 on VSC board.

IC201 (VPC3230D) Decoder IC

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Examples

ExamplesExamples

IC201(VPC3230D) Decoder is inferior

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Abnormal Normal

Noise with division of colors

Symptom

Cause

Countermeasure

Bad Connector connecting Control Board and VSC B/D.

Change the Connect or

Check

Contact point and signal condition of Connector Control Board and VSC Board.

Bad Connector

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Name No signal Vertical Bar

Symptom Cause and Countermeasure

1.Cause : Bad IC2 (DA1) F IC2 DA1(Data Arrange) No.162 Pin output is changing

depending on the temperature.G abnormal X-B’d Buffer I C * Room temperature : 2.5V Output (Normal Pin = over 2.8V) * Heated : 1.5V Output(Normal Pin = 2.7V )

G

G Bad IC2 (DA1)

GG

2. Countermeasure : Replace IC2

8cm

Realization

When ASIC Chip(IC2 DA1 LGD4001) on Control Board gets high temperature, you can observe it (In normal temperatu r e it’s O.K. )

< Waveform of normal pin>

H

H heated

HH

Buffer(74ACT541) waveform abnormally narrows.

I

I In this case, it is impossible for Flip Flop(74AC574) on

II

X B/D to read data.

DA1

Buffer

< Waveform of abnormal pin >

H

H heated

HH

DA1

Buffer

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Name Add O pen (Green 1 Line)

Symptom Cause and Countermeasure

1.cause: Add. COF Drive IC inferior

Add. COF Drive IC

Normal Line Data waveform

F the output of inferior line less than that of the normal Line Add. COF Drive IC inferior F COF inspectionJKL : 24V Open check (normal 50V)

Open Line Data output waveform

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Name Vert ical bar when Power off/on(Mis-discharge)

Symptom Cause and Countermeasure

1.Cause : Control board malfunctions when Power off/on.

2.Countermeasure: Change some parts on Control board.

3.Changing parts : A32_CTRL_03 B/D (Marked on PCB)

-.R14,17,18,21 : 330 ==> 4 .7K (Chip Resistor)

-.R15,16,19,20 : 22K ==> 4. 7K (Chip Resistor)

-.C504, 505 : 0.1uF / 50V add (Chip Capacitor)

Control board

Realization

1.PDP Power on Mode external input (regardless of wire/wireless signal but it’s easy to reenact in wireless

signal)

2. Remove Power Cord (Power’s off)

3.after about 20minutes, insert Power cord (automatically the Power’s on and the vertical bar is shown as above)

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