Lg Pdp Training Manual 2005

Great Company Great People

2005.06.27

Jinha Hwang

E-Mail: [email protected]

Training Manual (PDP)Training Manual (PDP)Training Manual (PDP)

Display Div. SCR Gr.Display Div. SCR Gr.


No image in the specific area (see the screen location2)

1. Check the related X-Board’s Power connector.2. Check the signal cable between Controller PCB & X-Board3. Replace X-Board

Correlation between screen & X-Board

1) Top left 3/10 X Top-Right/ Bottom-left board

2) Center Top 2/5 X-Center Top board

3) Top right 3/10 X Top-left/Bottom right board

X Top-left/Bottom right board4) Bottom left 3/10

X-Center Bottom board5) Center Bottom 2/5

6) Bottom right 3/10 X Top-right/Bottom left board

Screen Location X-Board

2. Known Tips as to no data and partial display No image/Data COF IC.

1) Caused by X-Board’s having no power or connections

Data COF is totally or partially not displayed

2) Check the connector between COF IC & X-Board3) Data COF IC is defective , replace the related X-Boards

Examples.

2 3

4 5 6

1

Non-image

Non-image white

Partially displayed

Fig #1Fig #1

Fig #2Fig #2

Regular vertical line with one or more Data COF IC


1) Check the related X Board’s power connector.2) Check the signal cable between Controller PCB & X-Board.3) Replace X-Board

1) This is caused by X Board out put IC being defective. When COF IC’s have data this means the data transfer between theController PCB and X Board is missing

2) Check all related X Board connections.3) Replace that X Board or CTRL PCB or both if needed.

3

4 5 6

1

Fig #3Fig #3

2 Correlation between screen & X-Board

1) Top left 3/10 X Top-Right/ Bottom-left board

2) Center Top 2/5 X-Center Top board

3) Top right 3/10 X Top-left/Bottom right board

X Top-left/Bottom right board4) Bottom left 3/10

X-Center Bottom board5) Center Bottom 2/5

6) Bottom right 3/10 X Top-right/Bottom left board

Screen Location X-Board

Partial error or total error with One or moreIC’s defective

Fig #4Fig #4


Related X-Board power supply voltage checkRelated X-Board power supply voltage check

Related X Board Connector checkRelated X Board Connector check

Related X Board & Connector checkRelated X Board & Connector check

Related X-Board replacementRelated X-Board replacement

Module (Panel) checkModule (Panel) check

Address Bar (Vertical) & Partial no-picture

Bottom left 3/10 of the screen with vertical bar Bottom left 3/10 of the screen with no-picture

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left

X Top - RightX- Left X Top - Center

VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Fig #5Fig #5 Fig #6Fig #6

Fig #7Fig #7

<XL_TOP B/D>

<XL_BOTTOM B/D>

<XR_TOP B/D>

<XR_BOTTOM B/D>

As the above, the space charging screen display is allocated for each X Board ( XL_TOP, XL_CNT, XL_BOT, XR_TOP, XR_CNT, XR_BOT ).

Thus, if the occurring screen problems are limited only to the space X B/D, For example, regular vertical line or abnormal screen in Data COF IC unit, Data COF unit can be the problems of X B/D.The inspection method will be explained in next chapter how to inspect when screen display doesn’t work at all about each X B/D, giving examples of XL_Top B/D.

<XC_TOP B/D>

<XC_BOTTOM B/D>

screen screenscreen

screenscreen

screen

Address Bar (Vertical) & Partial no-picture



X X

Y

X X

Y

X

Y

X

60” 50”

42” 40”

10. Grid X and Y Layout by screen size

X X X

Y

71”

Vertical Lines

9. Verticla Data copy1) This happens when scan wave is not reproduced property

2) Replace Y-BoardFig #8Fig #8


Only bottom image is displaying

Only Top image is displaying

Y-Board & Y-Drive Board Connector checkY-Board & Y-Drive Board Connector check

Y-Drive Board (TOP) Drive IC checkY-Drive Board (TOP) Drive IC check

Y-Drive Board replacementY-Drive Board replacement

Bar (Horizontal) half-picture

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Fig #10Fig #10

Fig #9Fig #9

Fig #10Fig #10


Vertical Lines

6.One or more vertical lines in the screen

1) Irregular vertical lines is not related to controller PCB or X-Board) 2) It is mainly caused by the followings open (or short)

-. Panel tsself defect-. Data COF FPC attached to panel is open or short.-. Data COF attached to panel itself is defective.

7. One or more horizontal lines in the screen

1) Irregular vertical line is not related to Controller PCB or Y-Board.2) It is mainly caused by the followings open (or short)

-. Y FPC Connector -� reinsertion-. Open because of Y-Drive’s connector dry joint �Drive Board replacement-. Panel itself is defective, Y-FPC attached to panel itself is open or short

8. Regular vertical lines in the whole screen. (mainly in one specific color, regular line is flicking)1) This problem is related to CONTROL PCB2) Replace CONTROL PCB

Regular vertical lines in the whole screen.

There can be several horizontal lines.

There can be several line in ¼ inch wide areaIt can be screen on the both side, right and left.The area is sometimes over ¼ inch wide

Fig #11Fig #11

Fig #12Fig #12

Fig #12Fig #12

Module Control Inspection Method

☞. Regular vertical lines occurs at regular intervals on whole screen.

(Generally, regular flickering phenomenon occurs in specific color)

1) Occurring regular vertical lines at regular intervals is the problem related to DA of Controller B/D.

2) Because DA is related to IC202, 205(Red), IC201,204(Green), IC200,203(Blue), confirm if these parts are soldered smoothly.

※ Confirm the parts related to the color of vertical lines occurring on the screen mainly and see the below as to related parts.

3) Confirm if the connection between above parts are Shorted with 3.3v or Ground.

4) Confirm if the adjacent two pins are shorted each other in connection with above parts.

5) Confirm if specific pin is not soldered in connection with above parts.

6) Confirm if the pin connected IC200-IC205 of DA is generated well and soldered smoothly.

7) Check the PCB pattern .

8) Change the Controller B/D.

※ display type of screen

Vertical lines occurs at regular intervals on whole screen

The color of vertical line

RED

GREEN

BLUE

IC202, 205

IC201, 204

IC200, 203

※ The relation between color of vertical lineoccurring on screen and SGRAM (IC200-IC205)


Dark picture

10. Input signal pattern is displayed bud the screen is dark.1) It happens when Z Board is not operating well2) Check whether Z-Board’s power connector is plugged properly3) Check whether the signal connector between Controller PCB & Z-Board is plugged.4) Replace Z-Board Controller PCB

11. Input signal is white pattern but other colors are displayed in spots, missing data.

1) Check the slope & waveform of Y-Board and set up, set down 2) Check the slope of Z-Board’s ramp waveform3) Measure each Board’s output waveform by over 200MHz Oscilloscope and reference Fig12 and 13.

It is possible to control Y-Board’s set up slope by adjusting VR2 and Z-Board’s ramp slope by adjusting VR1.

Fig #12Fig #12

Y-Board measurement point : B61 (SUS_UP OUT PUT)

V-setup(200V~240V)

Vs(170~185V)

OV

140uS 170±5uS

10V

Vcc(90~110V)20±5uS

Fig #13Fig #13

Z-Board measurement point : B61 (SUS_UP OUT PUT)

Vs(170~185V)

3±2uS

23uS

Z-Ramp voltage waveY Sustain voltage wave


Panel TestingEtching Correction (Activating Heat Run) for Defective Panel

To enter in to White Balance (Heat Run), Press Power On (1).Then,Press adjust right(2) to activate Blue, Green and Red.With the Heat Run activated on White Balance run for 6 hoursAnd check color background by pressing adjust right(2) forTesting picture quality. Complete and repeat if needed not to exceed 24 hours.

OLD NEW

Panel Testing (Adjustment)

Z-Board Operation Principles☞. The structure and operation of Z B/D circuit

Z BOARD receives switch open and shut order signal from CONTROL BOARD and makes single SUS_OUT output wave form of

high voltage.

The switches used for forming wave form are 6 kinds and POWER FET for high voltage-high current is used.

6 signals connected from CONTROL BOARD ( SUS_UP, SUS_DN, E/R_UP, E/R_DN, RAMP, Z_BIAS ) adds to the gate of each

FET through buffer(IC1) and FET DRIVER IC (HCPL314J). The rest of 4 switch excluding RAMP and Z_BIAS have high

frequency of drive and many current frequency and much heat, so it is module type with IC and this module has FET and FET

DRIVER IC (IR2113S).

On the other hand,when SUS_UP and SUS_DN comes in HIGH at the same time,it is supposed to Shut-down the FET

DRIVER IC (IR2113S) to prevent them from turning ON at the same time.

The condenser for E/R (Energy Recovery) is fixed for pin 16(ER_COM)of IC4,5,6 to raise energy efficiency,and coils are put in

the passage to the SUS_OUT line to fix output ascending and descending roll off when E/R part switching.

The SUS_OUT output formed in Z BOARD is supplied to all the ROW of every panel equally.

Z Board BLOCK DIAGRAM

Vs(170-190V)

SUS_UP

SUS_DN

E/R_UP

E/R_DN

RAMP Connected to PANEL.

`

3

1-b

2-b

1-a

2-a

Vz ( Vs-12V )

Z_BAIS

4

Z_SUS_OUT

Z-Board Operation Principles

ER_UP

ER_DN

SUS_UP

SUS_DN

Vs

Vs

IPM for Sustain Pulse Generation and ER

The part for Ramp of Erase Pulse

L

SUS_OUT

LM317VzbVs

The part for Vzb

VR

Z bias

RAMP

_UP

■Schematic Diagram of Z Sustain Board

Great Company Great People1


Picture is dark and wrong discharge(phenomenon) Picture is dark and wrong discharge(phenomenon)

IPMCheck the B+ terminal & Cable connectorCheck the B+ terminal & Cable connector

Connector of badness : Picture is dark & has too much noise


Check the Z-Board and cable connectorCheck the Z-Board and cable connector

Z-Board


Insert to Z-Board and X-Board linking connector is badPicture is dark and wrong discharge(phenomenon)

Z-Board

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Check the B+ teminal & Cable connectorCheck the B+ teminal & Cable connector



Check the Z-Board and cable connectorCheck the Z-Board and cable connector

Y-Sustain Board

Vs

Vsetup

Vsc

-Ve

+

+

+

-Vy

+

Er_up

Er_dn

Sus_up

Sus_dn

Pass_top

Pass_btm

Ramp_up

Ramp_dn SW

SE

SE

SCAN

NSCAN

FGND

FGND2

+15V(F2) 15V(F2)

15V(F5)

15V(F)

FGND5

SUS_UP

15V(F)

15V(F)

FGND3

15V(F3)

FGND4

15V(F4)15V(F)

voltage LEVEL : Vs, Vsc, Vsetup, -Vy, Ve, +5V, +5V(F),15V, GNDFGND, +15V(F), FGND2, +15V(F2), FGND3, +15V(F3)FGND4, +15V(F4), FGND5, +15V(F5), VPP

I P MI P M SCAN DRIVER IC

(SN755864APZP)

YSUS_DN

■ Schematic Diagram of Y Board

Y-Sustain Board

Y0V

Set-up Scan Sustain

Set-upSet-up □It is the process of charge form in internal wall and initial reset.

□It affects greatly wall charge form part.

ScanScan

SustainSustain

■ Role of Y Board

□It is for PDP Module brightness and graduation form.

(ex. If it has more Sustain , it gets brighter and it indicates graduation and luminance.)

□It is also called address section , confirms if there is X part data.(It is the section that determines existence of operation in sustainsection due to the first discharge.

Y-Sustain Board

<Set down stage>

the state sagging the voltage gradually and decreasing the formed wall charge in uniform cost without discharge

the stage preparing for Scan ,having uniform cost of wall charge in discharge space

< Scan stage >

the stage other line Scanned Nothing happens

< Scan stage >

the stage present line is scanned

External operation discharge occurs by the voltage authorized to polarity inversion and wall charge of Y polarity inversion part

< Sustain stage >

surface charge occurs between Y polarity inversion and Z polarity inversion by the voltage authorized to Y polarity inversion and wall charge of Y polarity inversion part

< Sustain stage >

surface charge occurs between Y polarity inversion and Z polarity inversion by the voltage authorized to Z polarity inversion and wall charge of Z polarity inversion part

< Erase stage >

the stage

swelling the

voltage gradually

and dissipating

all the wall

charge

< Set up state >

the stage swelling the voltage gradually and increasing the amount of wall charge

Scan polarity inversion(Y)

A2 wave form

Common sustain polarity inversion (Z)

Data polarity inversion (Y)

180 V

180 V

280 V

70 V

70 V

180 V

180 V

Setup Scan ( Address ) Sustain Erase

Set downSet up

X

Y Z460 V 180 V

X

Y Z180 V 180 V

0 VX

Y Z0 V 180 V

0 VX

Y Z70 V 180 V

70 VX

Y Z0 V 180 V

70 VX

Y Z180 V 0 V

0 VX

Y Z0 V 180 V

0 VX

Y Z0 V 0 V

0 V

(1) (4) (5)(3) (7) (8) (9)

(9)(8)(7)(5)(4)(3)(2)(1)

(2)

the stage wall charge has

increased by scan stage

X

Y Z180 V 0 V

0 V

(6)

(6)

Y-Sustain Board

PDP

CRT

..... .....

brig

htness

brig

htness

time

time

1/60 seconds

1/60 seconds

Mechanism of brightness(graduation) expressionDisplay Device

PDP vs. CRT

◈ In the case of PDP, luminance control by current is difficult because of ultraviolet rays saturation by current and visible rays saturation to the ultraviolet lays . Discharge occurs all over the screen period and discharge frequency indicates luminous intensity.(luminance ∝ discharge frequency)

◈ CRT indicates luminous intensity by electron beam intensity and one pixel brightens only once on one screen.

4. The control method of VR position such as Y-Board V-Setup voltage, VSC voltage, -Vy voltage and voltage

V-SET UP voltage

R89 both end CHECK

VY,VE voltageR8,R9 both end CHECK

VSC voltageR60 both end CHECK

ONE POINT Check Method 42” KK

Flicker is bad Flicker is bad

Y Board

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Check the VS, V-SETUP, confirmation of voltageCheck the VS, V-SETUP, confirmation of voltage

When there is wrong discharge effect andPicture doesn’t appear


Check the Y-Sustain Board and cable connectorCheck the Y-Sustain Board and cable connector

ONE POINT SVC Guide


Flicker is badFlicker is bad

Y Board

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Check the VS, V-SETUP, confirmation of voltageCheck the VS, V-SETUP, confirmation of voltage



Check the Y-Sustain Board and cable connectorCheck the Y-Sustain Board and cable connector

ONE POINT SVC Guide

ONE POINT Check Method

1. The contents to check surely before Z-Board check when screen darkness generates

1) Check the signal Line generated at Module Control Board

2) Check the Cable connected from Module Control Board to X-Board

3) Check the X-Board

4) Check the Cable connected from X-Board to Z-Board

2. The contents to check when voltage of Module Control Board 15V Line is sagged

1) Check the Module Control Board 15V Line Short

2) Check the Y-Driver Board Short

3) Change the Y-Board and Z-Board at the same time when 15V Line voltage is sagged about 8~9V. If only Y-Board is changed, badness can generates again.

3. Module changing, if UP Greade S/W is pressed at VSC Board, LED lamp isn’t turned on and flickered gradually inside VSC Board

42” KK


Y-Driver Board Inspection Point

☞. The screen isn’t displayed at all Scan FPC wise.

1) If the screen isn’t displayed Scan FPC wise, it may be the problems between relevant Scan FPC and Y DRV B/D

2) Check if the connector of Scan FPC corresponding to the part that isn’t displayed is connected well with Y DRV B/D

3) Check if the Clock, Data signal of relevant Scan FPC input signal of Y DRV B/D is shorted with +5V or Ground.

4) Check if the output buffer of Y B/D related to relevant Scan Drive IC works normally.

5) Check if the signals are authorized well to relevant Scan Drive IC.

6) Check if the relevant Scan Drive IC Failed.

7) Check the PCB pattern.

※ examples of display type of screen

Normal part

The part that isn’t displayed at all


CURTAIN BAR Trouble Types

In the case of

Curtain Bar

In the case of

Curtain Bar

When setting up to Y-

Driver Board, Diode

Check the Down terminal,

it has a Short-circuit

When setting up to Y-

Driver Board, Diode

Check the Down terminal,

it has a Short-circuit

In the case of

wrong discharge

In the case of

wrong discharge

When setting up to Y-DriverBoard, Diode Check the Down terminal, it has aShort-circuit

When setting up to Y-DriverBoard, Diode Check the Down terminal, it has aShort-circuit

Both end Diode Check (when Short-circuiting,it has a problem)

ONE POINT SVC Guide

CURTAIN BAR Trouble Types

- 84 -Great Company Great People QAS 365QAS 365

ONE POINT SVC Guide


Picture when signal is input Horizontal bar

Check the Y-Drive board connection state moduleOr an alien substance

Check the Y-Drive board connection state moduleOr an alien substance

Badness : horizontal barBadness : horizontal bar

Check the Y-Drive Board and module connection filmCheck the Y-Drive Board and module connection film

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

ONE POINT SVC Guide

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board


Specific part is black and has no picture Specific part is black and has no picture

Check the SCAN Drive IC Check the SCAN Drive IC

Check the connectionCheck the connection

Y-Drive Board Y-Drive Board

ONE POINT SVC Guide

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board


Picture when signal is inputPicture when there’s no signal

Diode check Y-Sustain UP Terminal Diode check Y-Sustain UP Terminal

Diode check Y-Sustain Down TerminalDiode check Y-Sustain Down Terminal

Y-Drive Board Scan Drive IC bad , broken or short Y-Drive Board Scan Drive IC bad , broken or short

Y-Drive Board Y-Drive Board

ONE POINT SVC Guide

Module Control Board

4EA

4EA

Differntial input

TMDS 4Pair

LVDS 10Pair42” 5Pair

TMDSLVDS

SPTC4021

Frame Memory(1 Dealy)

3EA(arranged deletion)

3Bit(Serial communication)

Flash Mem

16

100MHz(OSC)

SSC

DA/MEM4011

DA/MEM4011

16*3(12*3)

16*3(12*3)

A

A

A

B

SF Mem(3)

SF Mem(3)

X, Y, Z Contro 8*3SF Mem(3)

SF Mem(3)8*3

8*3

8*3

Flash DownloadB

Temp Sense

Micom4

19

A74AC74

Demultiply dircuit

A

A

74LVTH541

Delay

74LVTH541

Delay

X Data((6*2)*11=132bit

X Data((6*2)*11=132bit

X clock Delay

X clock Delay

50/60KK CTRL Block chart

- 67 -Great Company Great People QAS 365QAS 365

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Great Company Great People QAS 365QAS 365


Flicker is bad

ONE POINT SVC Guide Module Control Board

- 69 -

Check the controller board connectionCheck the controller board connection

Check the controller board B+ VoltageCheck the controller board B+ Voltage

Replace controller board Replace controller board



MCM IC Problem

BARS appears at regular intervals

Check the controller board connectionCheck the controller board connection



Module Control Board ONE POINT SVC Guide

Great Company Great People QAS 365QAS 365


ONE POINT SVC Guide Module Control Board

- 71 -

BARS appears at regular intervals

Control board & VSC connect cable CheckControl board & VSC connect cable Check




VSC Board Flicker is bad

VSC Board

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Control board & VSC connect cable CheckControl board & VSC connect cable Check

Check the VSC B+ VoltageCheck the VSC B+ Voltage

Replace VSC board Replace VSC board

#. VSC : Video scan controller

ONE POINT SVC Guide


Bad work film is torn.When black ADD BAR appears

Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Check the firm linking X-board & moduleCheck the firm linking X-board & module

Check the COF resistorCheck the COF resistor

Replace moduleReplace module

Check the firm linking X-board & control boardCheck the firm linking X-board & control board

ONE POINT SVC Guide


Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board

Check & Adjust : PFC /VS /VA Voltage topanel specification


Check Y-Sustain Sub-amp waveformCheck Y-Sustain Sub-amp waveform

Replace Y-Sustain amp Replace Y-Sustain amp

Not Resolved? Replace Control boardNot Resolved? Replace Control board

ONE POINT SVC Guide


Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board




Okey? Replace Y-Sustain amp Okey? Replace Y-Sustain amp


ONE POINT SVC Guide


Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board






ONE POINT SVC Guide


Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board






Y-Sustain waveform test point Y-Sustain waveform

ONE POINT SVC Guide


Controller Board

X-RightX- Left

Y-SUS Z-SUS

X- Left


VSC

V setup -Vy

-Ve

VS

VaVSC Board

Tuner Board



Check the connection VSC & Control boardCheck the connection VSC & Control board

Okey? Replace VSC BoardOkey? Replace VSC Board


VSC Connector VSC Board Control Board

ONE POINT SVC Guide




Check the X-board waveformCheck the X-board waveform

Okey? Replace X- BoardOkey? Replace X- Board

Not Resolved? Check for C.O.F IC ShortNot Resolved? Check for C.O.F IC Short

Waveform C.O.F CheckX-board connection

ONE POINT SVC Guide

Check & Adjust : PFC/VS/ VA Voltage to panelSpecification

Check & Adjust : PFC/VS/ VA Voltage to panelSpecification

Check Y-Sustain Sub-amp wave formCheck Y-Sustain Sub-amp wave form

Okay? Replace Y-Sustain AmpOkay? Replace Y-Sustain Amp

Not Resolved? Replace Controller BoardNot Resolved? Replace Controller Board

Not Resolved? PanelNot Resolved? Panel

Y Sustain waveform test point Y Sustain waveform Control board

ONE POINT SVC Guide

In the case of wrong discharge trouble

ONE POINT SVC Guide

Documents

Lg Pdp Training Manual 2005