lg PDP42V7 Service Manual

PDP MODULE

English

SERVICE MANUAL

MODEL : PDP42V7####

CAUTION

1. BEFORE SERVICING THE PDP MODULE,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

2. WHEN REPLACEMENT PARTS ARE REQUIRED, BE SURE TO USE
REPLACEMENT PARTS SPECIFIED BY THE MANUFACTURER.

- 2 -

[PDP42V7#### Module]

CONTENTS

Ⅰ. Safety Precautions/Technical Feature
Ⅱ. Formation and Specification of Module
Ⅲ. Adjustment
Ⅳ. Trouble Shooting

1. Checking for No Picture

2. Hitch Diagnosis Following Display Condition

2-1. All or 1/2 of the screen doesn’t be shown
2-2. Screen doesn’t be shown as Data TCP
2-3. It is generated unusual pattern of Data TCP IC unit
2-4. Regular Stripe is generated about the quantity of one Data TCP IC or more
2-5. Screen doesn’t be shown at all as Scan FPC
2-6. Regular stripe is generated at regular internal on the whole screen
2-7. Data copy is generated to stripe direction
2-8. One or more stripe is generated on the screen
2-9. One or more horizontal line is generated on screen
2-10. Lightness of screen is wholly darken though there is input-signal-pattern
2-11. Different color is shown partially during full-white-screen or electric discharge is generated

during full-black-screen

2-12. Some lightness of some color doesn’t not generated well

3. Checking for component damage

3-1. Y IPM(IC15) or Z IPM(IC2) damage
3-2. Pass Top FET(Y B/D: HS2) damage
3-3. FET Ass’y(Y B/D: HS1) damage
3-4. SCAN IC(Y DRV B/D: IC1~8) damage
3-5. TCP damage
3-6. Crystal(CTRL B/D: X1) damage

4. Shift breakdown component compatibility consideration

4-1. Scan IC follows in application, compatibility of Y DRV Top, Bottom B/D

Ⅴ. Block Diagram
Ⅵ. Safety Components List
Ⅶ. Records of Revision for Boards, Components and ROM DATA

* Annexing : Schematic Diagram

English

- 3 -

1. Safety Precautions

When servicing of PDP Module, it should be not enforced into
another way aside next rule, or a unaccustomed person
should not repairing.
When using/handling this PDP Module, pay attention to the
below warning and cautions.

Warning

Indicates a hazard that may lead to death or injury if the
warning is ignored and the product is handled incorrectly.

Caution

Indicates a hazard that can lead to injury or damage to
property if the caution is ignored and the product is handled
incorrectly.

1) WARNING

(1) Do not touch Signal and Power Connnector while this

product operates.
Do not touch EMI ground part and Heat Sink of Film Filter.

(2) Do not supply a voltage higher than that specified to this

product. This may damage the product and may cause a
fire.

(3) Do not use this product in locations where the humidity is

extremely high, where it may be splashed with water, or
where flammable materials surround it.
Do not install or use the product in a location that does no
satisfy the specified environmental conditions. This may
damage the product and may cause a fire.

(4) If a foreign substance (such as water, metal, or liquid) gets

inside the product, immediately turn off the power.
Continuing to use the product, it is may cause fire or
electric shock.

(5) If the product emits smoke, and abnormal smell, or makes

an abnormal sound, immediately turn off the power.
Continuing to use the product, it may cause fire or electric
shock.

(6) Do not disconnect or connect the connector while power to

the product is on. It takes some time for the voltage to drop
to a sufficiently low level after the power has been turned
off.
Confirm that the voltage has dropped to a safe level before
disconnecting or connecting the connector.

(7) Do not pull out or insert the power cable from/to an outlet

with wet hands. It may cause electric shock.

(8) Do not damage or modify the power cable. It may cause

fire or electric shock.

(9) If the power cable is damaged, or if the connector is loose,

do not use the product: otherwise, this can lead to fire or
electric shock.

(10) If the power connector or the connector of the power

cable becomes dirty or dusty, wipe it with a dry cloth.
Otherwise, this can lead to fire.

(11) PDP Module uses a high voltage (Max.450V dc). Keep

the cautions concerning electric shock and do not touch
the Device circuitry when handling the PDP Unit. And
because the capacitor of the Device circuitry may remain
charged at the moment of Power OFF, standing by for 1
minute is required in order to touch the Device circuitry.

2) CAUTIONS

(1) Do not place this product in a location that is subject to

heavy vibration, or on an unstable surface such as an
inclined surface. The product may fall off or fall over,
causing injuries.

(2) Before disconnecting cable from the product, be sure to

turn off the power. Be sure to hold the connector when
disconnecting cables. Pulling a cable with excessive force
may cause the core of the cable to be exposed or break
the cable, and this can lead to fire or electric shock.

(3) This product should be moved by two or more persons. If

one person attempts to carry this product alone, he/she
may be injured.

(4) This product contains glass. The glass may break, causing

injuries, if shock, vibration, heat, or distortion is applied to
the product.

(5) The temperature of the glass of the display may rise to

80°C or more depending on the conditions of use.
If you touch the glass inadvertently, you may be burned.

(6) If glass surface of the display breaks or is scratched, do

not touch the broken pieces or the scratches with bare
hands. You may be injured.

(7) PDP Module requires to be handled with care not to be

touched with metal or hard materials, and must not be
stressed by heat or mechanical impact.

(8) There are some exposed components on the rear panel of

this product. Touching these components may cause an
electric shock.

(9) When moving the product, be sure to turn off the power

and disconnect all the cables. While moving the product,
watch your step. The product may be dropped or all,
leading to injuries of electric shock.

Ⅰ. Safety Precautions/Technical Feature

(10) In order to protect static electricity due to C-MOS circuitry of

the Drive part, wear a wrist band to protect static electricity
when handling.

(11) If cleaning the Panel, wipe it with a soft cloth moistened with

water or a neutral detergent and squeezed, being careful not
to touch the connector part of the Panel. And don’t use
chemical materials like thinner or benzene.

(12) If this product is used as a display board to display a static

image, “image sticking” occurs. This means that the luminance
of areas of the display that remain lit for a long time drops
compared with luminance of areas that are lit for a shorter
time, causing uneven luminance across the display.
The degree to which this occurs is in proportion to the
luminance at which the display is used. To prevent this
phenomenon, therefore, avoid static images as much as
possible and design your system so that it is used at a low
luminance, by reducing signal level difference between bright
area and less bright area through signal processing.

(13) Because PDP Module emits heat from the Glass Panel part

and the Drive circuitry, the environmental temperature must
not be over 40°C.
The temperature of the Glass Panel part is especially high
owing to heat from internal Drive circuitry. And because the
PDP Module is driven by high voltage, it must avoid
conductive materials.

(14) If inserting components or circuit board in order to repair, be

sure to fix a lead line to the connector before soldering.

(15) If inserting high-power resistor(metal-oxide film resistor or

metal film resistor) in order to repair, insert it as 10mm away
as from a board.

(16) During repairs, high voltage or high temperature components

must be put away from a lead line.

(17) This is a Cold Chassis but you had better use a cold

transformer for safety during repairs. If repairing electricity
source part, you must use the cold transformer.

(18) Do not place an object on the glass surface of the display.

The glass may break or be scratched.

(19) This product may be damaged if it is subject to excessive

stresses (such as excessive voltage, current, or temperature).
The absolute maximum ratings specify the limits of these
stresses.

(20) The recommended operating conditions are conditions in

which the normal operation of this product is guaranteed. All
the rated values of the electrical specifications are guaranteed
within these conditions.
Always use the product within the range of the recommended
operating conditions. Otherwise, the reliability of the product
may be degraded.

(21) This product has a glass display surface. Design your

system so that excessive shock and load are not applied to
the glass. Exercise care that the vent at the corner of the glass
panel is not damaged.
If the glass panel or vent is damaged, the product is
inoperable.

(22) Do not cover or wrap the product with a cloth or other

covering while power is supplied to the product.

(23) Before turning on power to the product, check the wiring of

the product and confirm that the supply voltage is within the
rated voltage range. If the wiring is wrong or if a voltage
outside the rated range is applied, the product may
malfunction or be damaged.

(24) Do not store this product in a location where temperature

and humidity are high. This may cause the product to
malfunction. Because this product uses a discharge
phenomenon, it may take time to light (operation may be
delayed) when the product is used after it has been stored for
a long time. In this case, it is recommended to light all cells for
about 2 hours (aging).

(25) This product is made from various materials such as glass,

metal, and plastic. When discarding it, be sure to contact a
professional waste disposal operator.

(26) If faults occur due to arbitrary modification or disassembly,

LG Electronics is not responsible for function, quality or other
items.

(27) Use of the product with a combination of parameters,

conditions, or logic not specified in the specifications of this
product is not guaranteed. If intending to use the product in
such a way, be sure to consult LGE in advance.

(28) Within the warranty period, general faults that occur due to

defects in components such as ICs will be rectified by LGE
without charge. However, IMAGE STICKING due to
misapplying the above (12) provision is not included in the
warranty. Repairs due to the other faults may be charged for
depending on responsibility for the faults.

(29) In assembling Module into SET, in case Film Filter and as a

protective film is bared, static electricity of exfoliated protective
film which is bared from beginning X-Board down ward getting
TCP to no getting TCP should not influence on TCP.
Also Filter after protective film is bared or in the storage can
be charged with electricity, so the EMI ground part of Film
Filter should be used after Grounding.

- 4 -

English

2. Technical Feature

PDP Module is a display device to be divided into a Panel part and a Drive part. The Panel part consists of
Electrodes, Phosphor, various dielectrics and gas, and the Drive part includes electronic circuitry and PCB.
PDP42V7#### model produced in the LG electronic is 42inches color Plasma display module of WVGA(852(H)x480(V)), and it is a
display device giving concrete to bright image by using AC Plasma technology of LG electronic.

1) General Specification

(1) Model Name : PDP42V7####
(2) Number of Pixel : 852(H) x 480(V) (1pixel=3 RGB cells)
(3) Pixel Pitch : 1080μm(H) x 1080μm(V)
(4) Cell Pitch : 320μm(H) x 1080μm(V) (Base: Green Cell)
(5) Display area : 920.1(H) x 518.4(V)±0.5mm
(6) Outline dimension : 1005(H) x 597(V)x 60.6(D)±1mm
(7) Color arrangement : RGB Closed type
(8) Number of COLRO : (R)1024 x (G)1024 x (B)1024
(9) Weight : 14.7Kg±0.5Kg

: 100Kg±5Kg(5EA/1BOX)
(10) Aspect Ratio : 16:9
(11) Peak Brightness : Typical 1500dc/㎡(1/10 White Window)

: Avergae 100:1(Light room 100 Lx at center)
(12) Contrast Ratio : Typical 10000:1(Dark room 1/10 White Window)

(White Window Pattern at Center)

(13) POWER CONSUMPTION : Typical 200 W(Full White)

* Note 1)

(14) Lifetime : Over 60,000 Hrs (Initial brightness 1/2)

2) Block Diagram

- 5 -

LVDS Input

Controller Signal

Full White standard

Mentioned voltage follows
a standard of each Board input voltage

* Note 1) It can be changed maximum 300W according to input image.

Ⅱ. Formation and Specification of Module

- 6 -

No

1
2
3
4

Connector

P1[Z SUS B/D]
P5[Y SUS B/D]
P6[Y SUS B/D]

P9[CTRL B/D]

Input Voltage & Signal

5V, Va, Vs

Vs
5V

Control Signal

No

1

2

3

4

5

6

7

6871QCH053A
6871QCH073A
6871QCH053B
6871QCH053C
6871QDH084A
6871QDH105A
6871QDH085A
6871QDH106A
6871QRH055A
6871QRH055B
6871QRH066A
6871QLH047A
6871QLH047B
6871QLH056A
6871QYH036A
6871QYH036B
6871QYH050A
6871QZH041A
6871QZH052A

PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y
PWB(PCB) ASS’Y

LVDS CTRL B/D ASS’Y
HITACHI COPPER LVDS CTRL B/D ASS’Y
LVDS OUTER SIDE CTRL B/D ASS’Y
PB-FREE FFC & CON LVDS OUTER SIDE CTRL B/D ASS’Y
YDRV TOP B/D ASS’Y
HITACHI COPPER YDRV TOP B/D ASS’Y
YDRV BTM B/D ASS’Y
HITACHI COPPER YDRV BTM B/D ASS’Y
XR B/D ASS’Y
PB-FREE FFC & CON XR B/D ASS’Y
HITACHI COPPER XR B/D ASS’Y
XL B/D ASS’Y
PB-FREE FFC & CON XL B/D ASS’Y
HITACHI COPPER XL B/D ASS’Y
YSUS B/D ASS’Y
PB-FREE FFC & CON YSUS B/D ASS’Y
HITACHI COPPER YSUS B/D ASS’Y
ZSUS B/D ASS’Y
HITACHI COPPER ZSUS B/D ASS’Y

Part No. Description

※ The composition and specification of Initial production module

Revision information refers to ‘Ⅶ Revision for Boards, Components and ROM DATA’

Ⅲ. Adjustment

1. Application Object

This standard is applied to the PDP42V7#### PDP Module
which is manufactured by the manufacturing team of PDP
promotion department or elsewhere.

2. Notes

(1) Without any special specification, the Module should be at

the condition of preliminaries more than 10minutes before
adjusting.

- Service signal : 100% Full White signal

- Service DC voltage : Vcc: 5V, Va: 65V, Vs: 187V

- DC/DC Pack voltage : Vsc=115V

- Preliminaries environment : Temp (25!5°C), Relative

humidity (65!10%)

(2) Module should get the Aging for the equilibrium after finish

the assembling. Aging condition is shown below.

- Service signal: 100% Full White, Red, Green, Blue pattern
signal(Service time of each pattern : within 5minutes/cycle)

- Service DC voltage : Match the voltage with the set up
voltage in the first adjustment.

- Aging time : More than 30 minutes

- Aging environment : Temp (25!2°C), Relative humidity­Less than 65%

(3) Module adjustment should be followed by below sequence.

- Setting up the Vsc/-Vy voltage(Vsc=115V, -Vy=-85V)

-

Adjusting the voltage wave form(Refer to adjustment)

-

25!5°C, 65!10%

(4) Without any special specification, you should adjust the

Module in the environment of Temp (25!5°C) and Relative
humidity (65!10%)

Caution) If you let the still image more than 10 minutes(especially

The Digital pattern or Cross Hatch Pattern which has
clear gradation), after image can be presented in the
black level part of screen.

-Vy: -85V

3-2. Connection diagram of measuring

instrument and setting up the initial
voltage

(1) For connection diagram of measuring instrument,

refer to Fig. 1.(Connection diagram of measuring
instrument that adjusting the voltage wave form)

(2) Setting up the initial voltage(Voltage Label)

Vcc: 5V, Va: 65V, Vs: 187V
But, Initially setting up voltage can be changed by the set
up range according to the Module’s characteristic.

3-3. How to Adjust

(1) Adjusting Vset-up Voltage Wave form

① Connect the measuring instrument to be (Fig. 1).
② Turn on the measuring instrument with Caution of (Fig. 1).
③ Connect the oscilloscope probe to B39(Bead) of Y B/D

bottom and GND.

④ Turn the VR1 of Y B/D and make the “A“ waveform Fig.

2 to be 10!2µs.

(2) Adjusting Vset-down Voltage Wave form

① Turn the VR2 of YSUS B/D and make the “B“ waveform

Fig. 2 to be 100!2µs.

English

3. Adjustment after Assembling

3-1. Using Tools

(1) Digital oscilloscope : More than 200MHz
(2) DVM(Digital Multimeter) : Fluke 87 or similar one
(3) Signal generator : VG-825 or similar one
(4) DC power supply or PSU

- DC power supply for Vs (1) : Should be changeable
between 0V to 200V/ more than 10A

- DC power supply for Va (1) : Should be changeable
between 0V to 100V/ more than 5A

- DC power supply for 5V (1) :Should be changeable
between 0V to 10V/ more than 10A

- DC-DC Converter Jig (1) : The Jig which has equivalent
voltage output of PDP42V7#### Module after taking the
Vs, Va, 5V voltage

- Voltage stability of power supply : Within !1% for Vs/Va,
within !3% for 5V

(Fig. 2) Y, Z set-up Waveform

(3) Checking the DC/DC pack voltage

① Convert the signal of signal generator to the 100% Full

White signal.

② Connect the GND terminal of DVM to the right leg of R53

on the Y B/D and set the Plus terminal to the left leg of
R53 to check the Vsc voltage(115!1V) and when there is
abnormality in voltage turn the variable resistor(VR3) of
DC/DC Pack(Vsc) PS1 on Y B/D to adjust.

③ Connect the GND terminal of DVM to the right leg of

R78 on the Y B/D and set the Plus terminal to the left
leg of R78 to check the -Vy voltage(-85!1V) and when
there is abnormality in voltage turn the variable
resistor(VR4) of DC/DC Pack(-Vy) PS1 on Y B/D to
adjust.

- 7 -

- 8 -

<Caution>

(1) The power of the signal generator should be turned on before turning on the power of DC power supply.
(2) The voltage of DC power supply , in standard of Module input voltage, should be preset as below.

Vcc: 5V, Va: 65V, Vs: 187V

(3) The power of power supply must turned on by this sequence. Reverse direction When turning off.

* Module on : 5V

(Va(

Vs, Module off: Vs(Va(5V

(4) Signal generator should be selected with 852)480(WVGA) mode.

(Fig. 1) Connection diagram of measuring instrument

DC Power Supply for 5V

DC Power Supply for Va

DC Power Supply for Vs

Power

Signal Generator(VG-825)

※ Also the PSU(Power Supply Unit) use is possible