LG FLATRON L2010P LB200A-WP, FLATRON L2010P Service Manual

MENU

SOURCE

AUTO

LIGHT VIEW

SELECT

COLOR MONIT OR

SER VICE MANUAL

CHASSIS NO. : CL-35
F ACT OR Y MODEL: LB200A

MODEL: L2010P(LB200A-WP)

CAUTION

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

1. LCD CHARACTERISTICS

Type : TFT Color LCD Module
Size : 20.1inch
Pixel Pitch : 0.255(H) x 0.255(V)
Color Depth : 8-bit, 16,777,216 colors
Electrical Interface : LVDS
Surface Treatment : Anti-Glare, Hard Coating(2H)
Operating Mode : Normally Black
Backlight Unit : Six-CCFL (Cold Cathode

Fluorescent Lamp)

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

10

Left : -70° min., -85°(Typ)
Right : +70° min., +85°(Typ)
Top : +70° min., +85°(Typ)
Bottom : -70° min., -85°(Typ)

2-2. Luminance : 160(min), 220(Typ) -6500K

: more than 110cd/m2 -9300K

2-3. Contrast Ratio : 350(Typ)

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

• Type : Separate, Positive/Negative
Composite, SOG (Sync On Green)
Digital

3-2. Video Input Signal

1) Type : R, G, B Analog

2) Voltage Level : 0~0.71 V

a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.467 Vp-p
c) Color 15, 0 : 0.714 Vp-p

3) Input Impedance : 75 Ω

3-3. Operating Frequency

Horizontal : 30 ~ 96kHz (Analog)

: 30 ~ 80kHz (Digital)

Vertical : 56 ~ 85Hz

4. MAX. RESOLUTION

Analog : 1600 x 1200

@75Hz

Digital : 1600 x 1200@60Hz

1280 x 1024@70Hz

5. POWER SUPPLY

5-1. Power Adaptor(Built-in Power)

Input : AC 100~240V, 50/60Hz , 1.0A

5-2. Power Consumption

6. ENVIRONMENT

6-1. Operating Temperature: 0°C~50°C (32°F~122°F)
6-2. Relative Humidity : 10%~80%

(Non-condensing)

6-3. MTBF : 50,000 Hours(Min)

7. DIMENSIONS (with TILT/SWIVEL)

Width : 446.0 mm (17.56'')
Depth : 222.5 mm (8.76'')
Height : 447.0 mm (17.6'')

8. WEIGHT (with TILT/SWIVEL)

Net. Weight : 9.3kg (20.50 lbs)
Gross Weight : 12kg (26.45 lbs)

9. USB

Upstream : 1 port, Downstream : 2 port
Speed : Full-12Mbps, Low-1.5Mbps

CONTENTS

SPECIFICATIONS

- 2 -

SPECIFICATIONS ................................................... 2

PRECAUTIONS ....................................................... 4

TIMING CHART ....................................................... 5

OPERATING INSTRUCTIONS ................................ 6

WIRING DIAGRAM ................................................. 9

BLOCK DIAGRAM ................................................. 10

DESCRIPTION OF BLOCK DIAGRAM...................11

ADJUSTMENT ...................................................... 13

TROUBLESHOOTING GUIDE .............................. 14

PRINTED CIRCUIT BOARD................................... 17

EXPLODED VIEW...................................................21

REPLACEMENT PARTS LIST ...............................23

PIN CONFIGURATION............................................29

SCHEMATIC DIAGRAM......................................... 35

MODE
POWER ON (NORMAL)
STAND-BY(With out USB)

SUSPEND(With out USB)

DPM OFF(With out USB)

POWER SWITCH OFF

POWER CUTOFF SWITCH OFF

H/V SYNC

ON/ON
OFF/ON
ON/OFF

OFF/OFF

-

-

POWER CONSUMPTION

less than 60 W

less than 5 W
less than 5 W

less than 3 W
less than 3 W
less than 1 W

LED COLOR

GREEN
AMBER
AMBER
AMBER

OFF
OFF

VIDEO

ACTIVE

OFF
OFF
OFF

-

-

Signal Connector Pin Assignment

Pin Signal (DVI-I)

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15

T. M. D. S. Data2­T. M. D. S. Data2+
T. M. D. S. Data2/4 Shield
T. M. D. S. Data4­T. M. D. S. Data4+
DDC Clock
DDC Data
Analog Vertical Sync.
T. M. D. S. Data1­T. M. D. S. Data1+
T. M. D. S. Data1/3 Shield
T. M. D. S. Data3­T. M. D. S. Data3+
+5V Power
Ground

(return for +5V,

H. Sync. and V. Sync.)

Pin Signal (DVI-I)

1

8

9

17

24

16

C1

C4

C3

C2

C5

16
17
18
19
20
21
22
23

24
C1
C2
C3
C4
C5

Hot Plug Detect
T. M. D. S. Data0­T. M. D. S. Data0+
T. M. D. S. Data0/5 Shield
T. M. D. S. Data5­T. M. D. S. Data5+
T. M. D. S. Clock Shield
T. M. D. S. Clock+
T. M. D. S. Clock­Analog Red
Analog Green
Analog Blue
Analog H. Sync.
Analog Ground

T. M. D. S. (Transition Minimized Differential Signaling)

• DVI-I Connector (Digital/Analog)

- 4 -

WARNING FOR THE SAFETY-RELATED COMPONENT.

• There are some special components used in LCD
monitor that are important for safety. These parts are

marked on the schematic diagram and the
replacement parts list. It is essential that these critical

parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.

• Do not modify original design without obtaining written
permission from manufacturer or you will void the
original parts and labor guarantee.

TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.

• Must mount the module using mounting holes arranged
in four corners.

• Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.

• Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.

• Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).

• Make certain that treatment person’s body are
grounded through wrist band.

• Do not leave the module in high temperature and in
areas of high humidity for a long time.

• The module not be exposed to the direct sunlight.

• Avoid contact with water as it may a short circuit within

the module.

• If the surface of panel become dirty, please wipe it off
with a softmaterial. (Cleaning with a dirty or rough cloth
may damage the panel.)

WARNING

BE CAREFUL ELECTRIC SHOCK !

• If you want to replace with the new backlight (CCFL) or
inverter circuit, must disconnect the AC adapter
because high voltage appears at inverter circuit about
650Vrms.

• Handle with care wires or connectors of the inverter
circuit. If the wires are pressed cause short and may
burn or take fire.

PRECAUTION

CAUTION

Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.

TIMING CHART

VIDEO

SYNC

B

D

C

F

E

A

<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>

Sync

Mode

10

11

12

13

14

15

16

17

18

19

20

H/V

Polarity

Sort

H + 31.47 800 640 16 96 48

1

V – 70.09 449 350 38 2 60
H – 31.47 800 640 16 96 48

2

V – 59.94 525 480 10 2 33
H – 37.5 840 640 16 64 120

3

V – 75 500 480 1 3 16
H – 43.27 832 640 56 56 80

4

V – 85.01 509 480 1 3 25
H – 31.47 900 720 18 108 54

5

V + 70.08 449 400 13 2 34
H + 37.88 1056 800 40 128 88

6

V + 60.32 628 600 1 4 23
H + 46.88 1056 800 16 80 160

7

V + 75.0 625 600 1 3 21
H + 53.67 1048 800 32 64 152

8

V + 85.06 631 600 1 3 27
H – 49.72 1152 832 32 64 224

9

V – 74.55 667 624 1 3 39
H – 48.36 1344 1024 24 136 160
V – 60.0 806 768 3 6 29
H + 60.02 1312 1024 16 96 176
V + 75.03 800 768 1 3 28
H + 68.68 1376 1024 48 96 208
V + 85.0 808 768 1 3 36
H – 68.68 1456 1152 32 128 144
V – 75.06 915 870 3 3 39
H+/– 61.80 1504 1152 18 134 200
V+/– 65.96 937 900 2 4 31
H + 63.98 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38
H + 79.98 1688 1280 16 144 248
V + 75.02 1066 1024 1 3 38
H + 62.11 1808 1600 90 30 88
V + 60.00 1040 1024 10 3 3
H + 75.0 2160 1600 64 192 304
V + 60.00 1250 1200 1 3 46
H + 93.75 2160 1600 64 192 304
V + 75.00 1250 1200 1 3 46
H + 74.97 1734 1600 20 90 24
V + 61.2 1225 1200 1 3 21

Dot

Clock

Frequency

25.175

25.175

31.5

36.0

28.324

40.0

49.5

56.25

57.283

65.0

78.75

94.5

100.0

92.978

108.0

135.0

112.27
162

(Analog only)

202.50

(Analog only)

130

(Digital only)

Total Period

(E)

Video Active Time

(A)

Front Porch

(C)

Sync Duration

(D)

Back Porch

(F)

Resolution

640x350

70Hz

640x480

60Hz

640x480

75Hz

640x480

85Hz

720x400

70Hz

800x600

60Hz

800x600

75Hz

800x600

85Hz

832x624

75Hz

1024x768

60Hz

1024x768

75Hz

1024x768

85Hz

1152x870

75Hz

1152x900

65Hz

1280x1024

60Hz

1280x1024

75Hz

1600x1024

60Hz

1600x1200

60Hz

1600x1200

75Hz

1600x1200

60Hz

OPERATING INSTRUCTIONS

MENU

SOURCE

AUTO

LIGHT VIEW

SELECT

FRONT VIEW

Front Control Panel

Power
Switch

Usb
Down
stream
Port

Usb
Down
stream
Port

Usb Up
stream
Port

REAR VIEW

D-Sub Signal

Connect

DVI

Connect

Stand

lock

Power

Connect

Front Control Panel

1. Power ON/OFF Button

Use this button to turn the monitor on or off.

2. Power Indicator

This indicator lights up green when the monitor
operates normally. If the display is in DPM(Energy

Saving)mode, this indicator color change to amber.

213 4876 5

4.

Buttons

Use these button to choose or adjust items in the On
Screen Display.

100

Bring up contrast and brightness
adjustment.

100

3. MENU Button

Use these button to enter or exit the On Screen Display.

5.

SELECT Button

Use this buttons to enter a selection in the On Screen
Display.

6. LIGHT VIEW

Button

This function optimizes the brightness, contrast of color

value to the surrounding conditions and settings
and enables you to enjoy the most suitable picture

by adjusting the

surroundings(DAY/LIGHT/USER MODE).

• TEXT: For viewing letters

• MOVIE: For viewing movies

• PHOTO: For viewing pictures or the photographs

• USER MODE: This function memorizes the manual
adjustment-Brightness, Contrast color value on the On
Screen Display

7. AUTO Adjustment

Button

When adjusting your display settings, always press
the AUTO button before entering On Screen
Display(OSD). This will automatically adjust your
display image to the ideal settings for the current
screen resolution size(display mode).
The best display mode is 1600 x 1200@60Hz.

8. SOURCE Selections:SOURCE →→SELECT
Use this button to make DVI

digital, DVI analog or D-sub
analog connector active.
This feature is used when two

computers are connected to the display. The default
setting is D-sub.

• DVI DIGITAL

• DVI ANALOG

• D-SUB ANALOG

.CONTROLS LOCKED /UNLOCKED: MENU & Button

Direct Access Function

INPUT SELECT

DVI DIGITAL
DVI ANALOG

DSUB ANALOG

AUTO IN PROGRESS

LIGHT VIEW

DAY TXT

NIGHT TEXT

USER MODE

PHOTO

PHOTO

MOVIE

MOVIE

This function allows you to secure the
current control settings, so that they
cannot be inadvertently changed.
Press and hold the MENU button and

button for 3 seconds: the message

“CONTROLS LOCKED” appears.
You can unlock the OSD controls at any time by pushing the

MENU button and button for 3 seconds:
the message “CONTROLS UNLOCKED” will appear.

CONTROLS LOCKED

CONTROLS UNLOCKED

Making use of USB (Universal Serial Bus)*

USB (Universal Serial Bus) is an innovation in connecting your different desktop peripherals conveniently to your computer.
By using the USB, you will be able to connect your mouse, keyboard, and other to your monitor instead of having to
connect them to your computer. This will give you greater flexibility in setting up your system. USB allows you to connect
chain up to 120 devices on a single USB port, and you can “hot” plug (attach them while the computer is running) or unplug
them while maintaining Plug and Plug auto detection and configuration. This monitor has an integrated BUS-powered USB
hub, allowing up to 2 other USB devices to be attached it.

USB connection

1. Connect the upstream port of the Display to the downstream port of the USB compliant PC or another hub using the
USB cable. (Computer must have a USB port)

2. Connect the USB compliant peripherals to the downstream ports of the monitor.

USB upstream Port

USB downstream Port

connect the cables from USB
compliant peripherals-such as
keyboard, mouse, etc

To USB downstream port
of the USB compliant PC

or another hub cable

NOTE

To activate the USB hub function, the monitor must be connected to a USB compliant PC(OS) or another hub with the USB
cable(enclosed).

When connecting the USB cable, check that the shape of the connector at the cable side matches the shape at the connecting
side.

Even if the monitor is in a power saving mode, USB compliant devices will function when they are connected the USB ports(both
the upstream and downstream) of the monitor.

- 8 -

J6

J5

J1

CN1

CN4

CN7

CN8

CN9

CN5

CN6

P904

P903

P902

WIRING DIAGRAM

J7

J19

CN1B

CN1A

Connector the Main PCB Ass’y and LCD Module

Connector Ass’y P/N:

6631T11016A

Connector Ass’y P/N:

6631T11016A

Connector Ass’y P/N:

6631T20015Y

Connector Ass’y P/N:

6631T20015X

Connector Ass’y P/N:

6631T25005F

Connector Ass’y P/N:

6631T20013P

Connector Ass’y P/N:

6631T25008Q

Video

Processor

With MICOM

(PW166B-30T)

FLASH

(M29W800B)

LCD

Module

(LQ201U1LW01)

Sharp

DVI-ID-Sub Control Board

TMDS

Receiver

(SiI161B)

LVDS

Transmitter

(THC63LVDM83R)

ADC

(AD9888XS-205)

SCL

SDA

3.3V DEN

DDC-SDAA2

Even

R,G,B

Even

R,G,B

Odd

Odd

Digital
Signal

ADC-CTL

3.3V_AD

3.3V

2.5VSTB

GVS

GHS

TXD
RXD

VSYNC-DVI

HSYNC-DVI

E

2

2

PROM

(24LC21)

DDC-SCLB

DDC-SDAB

Video Signal

R,G,B,H1/V1

R,G,B,H2/V2

COAST

KEY-CTRL

KEY-CTRL

E PROM
(24LC21)

LVDS

Transmitter

(THC63LVDM83R)

3.3V DEN

Analog

R,G,B

ROMOE

ROMWE

DDC-SCLA2

Multiplexer

(MC14066B)

DDC-SDAA

DDC-SCLA

5VST

TXD
RXD

DAT A

ADDRESS

E PROM

(24LC16B)

SCL
SDA

ASOG

COMPOSITE_SYNC

POWER
Boar d

5VS

5VS

11112222VVVVSS

SS

INVERTER

DC/DC

(4973D33)

GVS

GHS

Multiplexer

(74LVC257)x2

HS_DSUB

VS_DSUB

ASOG

COMPOSITE_
SYNC

Buffer

(74FCT541CT)

DAT A

3.3V

RDN
CS0N

HS/VS_DVI

COAST

Sync_Sel
GREF

GREF

DEN

Sync_Sel

RDN
CS0N

TMDSRX_PDNN

TMDSRX_PDNN

3.3V

Power switch

IRF7314

LCD_VDD

BBBBLLLLOOOONN

NN

BLO N

REGULATOR

(LM317)

V2.5STB

REGULATOR
(LM2937IMD)

11112222VVVVSS

SS

3.3V_AD

3.3V

3.3V

3.3V

USB Board

TPS2036

TPS2042

UP

Down

TPS76433

5VS

DESCRIPTION OF BLOCK DIAGRAM

1. Input Selection Circuit

This block is composed of 74LVC257(U1) and peripheral devices.
There are two input, Analog and Digital H/V Sync. LVC257 IC chooses one input and outputs selected input through
sync selection pin (Pin 1).

2. A/D Converter

This block is composed of AD9888 (U4) and passive devices.
Input video signal is amplified, Phase locked, A/D converted in this IC.
And send the Digital video signal to PW166B.

3. TMDS Receiver

This Block is composed of SiI161B (U201) and Peripheral devices.
This IC decodes CompositeInput signal from DVI-I Pin (J10) and make 8bit digital signal to send Digital signal to
PW166B.

4. Format Converter

This block is composed of PW166B (U8), M29W800AT (U9) and passive devices.

Micom in PW166B(Scaler)(U8) processes A/D Converter output, output of TMDS Receiver,
PW166B is Format Converter IC that receive Digital signal and output proper frame signal to LCD Module

(1600x1200).

5. Panel-Link Circuit

LVDS Transmitter(U401) is the IC that receives output digital signal of PW166B(U8) and output
composite signal to LCD Module.
Composite signal is the standard format for LCD Panel.

6. DC/DC Converter block

DC/DC Converters convert the input 12V to proper 2.5V, 3.3V, 5V, 12V for main board.
For shooting heat trouble, we use the DC/DC converting IC.

- 12 -

EMI

COMPONENTS

LINE

100 ~ 240V

INPUT RECTIFIE R

AND FILTER

ENERGY

TRANSFER

OUTPUT RECTIFI ER

AND FILTER

12V

5V

GND

SIGNAL

COLLENTION

PHOTO-COUPLER

ISOLATION

PWM CONTROL

CIRCUIT

HVDC

100KHz

PRIMARY

SECONDARY

50 ~ 60Hz

Operation description_Power

1. EMI components.

This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR,
the circuit included a line-filter, across line capacitor and of course the primary protection fuse.

2. Input rectifier and filter.

This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor.

3. Energy Transfer.

This part function is transfer the primary energy to secondary through a power transformer.

4. Output rectifier and filter.

This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to
adjust the duty cycle during different AC input and output loading condition to achive the dc output stablize, and also
the over power protection is also monitor by this part.

5. Photo-Coupler isolation.

This part function is to feed back the dc output changing status through a photo transistor to primary controller to
achive the stablized dc output voltage.

6. Signal collection.

This part function is to collect the any change from the dc output and feed back to the primary through photo
transistor

ADJUSTMENT

220

IBM
Compatible PC

Video Signal
Generator

PARALLEL PORT

Power inlet (required)

Power LED

ST Switch

Power Select Switch
(110V/220V)

Control Line

Not used

RS232C

PARALLEL

V-SYNC

POWER

ST

VGS

MONITOR

E

E

V-Sync On/Off Switch
(Switch must be ON.)

F

F

A

A

B

B

C

C

15

10

5

5

69

1

1

1

14

13

25

6

5V

5V

5V

4.7K

4.7K

4.7K

74LS06

74LS06

OFF ON

OFF

ON

11

All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several minor adjustment may be required.
Adjustment should be following procedure and after
warming up for a minimum of 30 minutes.

• Alignment appliances and tools.

- IBM compatible PC

- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)

- Oscilloscope.

- White Balance Meter. (CA-110)

1. Adjustment for Factory Preset Mode

No read to adjust FOS data for Factory Preset Mode.

2. Adjustment for White Balance

1) Set External Bright to MAX position and Contrast to
MAX position.

2) Display Color 0,0 pattern at Mode 18.

3) Press Menu key, Up key, Right key in sequence.

4) Select “WHITE BALANCE ADJUST” and press SET
KEY.

5) After “INPUT WHITE PATTERN” message, Display
Color 15, 0 pattern at Mode 18.

6) No attempt to manually adjust, BIAS and Drive data
is automatically adjustde and saved to the EEPROM.

7) After “OK” message, Press SET KEY.

8) Select “SERVICE MODE EXIT” and Press SET KEY.

Figure 1. Cable Connection

TROUBLESHOOTING GUIDE

1. OUT OF ORDER ON POWER

POWER LAMB OFF STATE

POWER CHECK

KEY CONTROL CHECK

CONN(J6) CHECK

KEY_CONTROL CHECK

PW166B(U8)

INPUT POWER

CHECK

U20(3.3V)

GND

M29W800AT(U9)

INPUT POWER

CHECK

U20(3.3V)

GND

OTHER CIRCUIT CHECK

INVERTER

INPUT POWER

CHECK

U34(12V)

GND

CONN(J1) CHECK

INVERTER CHECK

MODULE

INPUT POWER

CHECK

U34(12V)

GND

CONN (J4) CHECK

MODULD CHECK

(REF)
U20 (L4973) : INPUT(12V), OUTPUT(3.3V)
U34 (IRF7814) : PIN OUTPUT (12V_MOD)

PIN OUTPUT (12V_INV)