LG Photon19Vision Schematic

COLOR MONIT OR

SER VICE MANUAL

CAUTION

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

MODEL: Photon19vision

CHASSIS NO. : CL-62

LIGHT VIEW

AUTO

SOURCE

MENU

SELECT

1. LCD CHARACTERISTICS

Type : TFT Color LCD Module
Size : 19inch(48cm)diagonal
Pixel Pitch : 0.294(H) x 0.294(V)
Color Depth : 8-bit, 16,777,216 colors
Electrical Interface : LVDS
Surface Treatment : Anti-Glare, Hard Coating(3H)
Operating Mode : Normally Black
Backlight Unit : 4-CCFL (Cold Cathode

Fluorescent Lamp)

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

10
Left : - 85° min., - 88°(Typ)
Right : +85° min., +88°(Typ)
Top : +85° min., +88°(Typ)
Bottom : - 85° min., - 88°(Typ)

2-2. Luminance : 185(min), 250(Typ)
2-3. Contrast Ratio : 250(min), 400(Typ)

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

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

3-2. Video Input Signal

1) Type : R, G, B Analog

2) Voltage Level : 0~0.7 V

a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.35 Vp-p
c) Color 15, 0 : 0.7 Vp-p

3) Input Impedance : 75 Ω

3-3. Operating Frequency

Horizontal(Analog) : 30 ~ 83kHz
Horizontal(Digital) : 30 ~ 71kHz
Vertical : 56 ~ 75Hz

4. MAX. RESOLUTION

D-sub Analog : 1280 x 1024@75Hz
DVI Digital/Analog : 1280 x 1024@60Hz

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: 10°C~35°C
6-2. Relative Humidity : 10%~80%
6-3. MTBF : 50,000 Hours

Lamp Life : 40,000 Hours(Min)

7. DIMENSIONS (with TILT/SWIVEL)

Width : 413 mm (16.26'')
Depth : 228 mm (8.98'')
Height : 435mm (17.13'')

8. WEIGHT (with TILT/SWIVEL)

Net. Weight : 8.3kg (18.30 lbs)
Gross Weight : 10.6kg (23.37 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 ................................................. 8

BLOCK DIAGRAM ................................................... 9

DESCRIPTION OF BLOCK DIAGRAM...................10

ADJUSTMENT ...................................................... 12

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

EXPLODED VIEW...................................................18

REPLACEMENT PARTS LIST ...............................20

SCHEMATIC DIAGRAM......................................... 23

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

DPM OFF

POWER S/W OFF

H/V SYNC

ON/ON
OFF/ON
ON/OFF

OFF/OFF

-

POWER CONSUMPTION

less than 45 W

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

LED COLOR

GREEN
AMBER
AMBER
AMBER

OFF

VIDEO

ACTIVE

OFF
OFF
OFF

-

- 3 -

Signal Connector Pin Assignment

Pin Signal (DVI-D)

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-D)

1

8

9

17

24

16

16
17
18
19
20
21
22
23
24

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. Clock-

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

• DVI-D Connector

- 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

- 5 -

VIDEO

SYNC

B

D

C

F

E

A

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

H + 31.469 800 640 16 96 48
V – 70.8Hz 449 350 37 2 60

H – 31.469 840 640 16 96 48
V – 59.94 525 480 10 2 33
H – 37.5 840 640 16 64 120
V – 75 500 480 1 3 16

H – 31.468 900 720 18 108 54
V + 70.09 449 400 12 2 35

H + 37.879 1056 800 40 128 88
V + 60.317 628 600 1 4 23
H + 46.875 1056 800 16 80 160
V + 75.0 625 600 1 3 21
H+/– 49.725 1152 832 32 64 224
V+/– 74.55 667 624 1 3 39
H – 48.363 1344 1024 24 136 160
V – 60.0 806 768 3 6 29
H – 60.123 1312 1024 16 96 176
V – 75.029 800 768 1 3 28

H+/– 68.681 1456 1152 32 128 144
V+/– 75.062 915 870 3 3 39
H+/– 61.805 1504 1152 18 134 200
V+/– 65.96 937 900 2 4 31
H + 63.981 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38

H + 79.976 1688 1280 16 144 248
V + 75.035 1066 1024 1 3 38

Mode

H/V

Sort

1

2

3

4

5

6

7

8

9

10

11

12

13

25.175

28.321

25.175

31.5

40.0

49.5

57.283

65.0

78.75

100.0

92.978

108.0

135.0

640x350

70Hz

640x480

60Hz

640x480

75Hz

720x400

70Hz

800x600

60Hz

800x600

75Hz

832x624

75Hz

1024x768

60Hz

1024x768

75Hz

1152x870

75Hz

1152x900

65Hz

1280x1024

60Hz

1280x1024

75Hz

Sync

Polarity

Frequency

Dot

Clock

Total Period

(E)

Video Active Time

(A)

Sync Duration

(D)

Back Porch

(F)

Front Porch

(C)

Resolution

- 6 -

FRONT VIEW REAR VIEW

OPERATING INSTRUCTIONS

See Front Control Panel

USB Port

DVI
Connect

D-Sub Signal
Connect

Power
Connect

Front Control Panel

1. Power Button

Use this button to turn the display on or off.

Power (DPMS) Indicator

This Indicator lights up green when the display operates
normally. If the display is in DPM (Energy Saving) mode,
this indicator color changes to amber.

2. MENU Button

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

3.

¡ ¡ª¢‚¢”

Button

Use these buttons to choose or adjust items in the On

Screen Display..

4. AUTO/SELECT Button

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

When adjusting your display settings,
always press the AUTO/SELECT button
before entering the 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 1280x1024.

5. SOURCE

Use this button to make Dsub or DVI connector active. This
feature is used when two computers are connected to the
display. The default setting is Dsub.

This feature lets you easily select the best desired image condition
optimized to the environment (ambient illumination, image types etc.).

• DAY : Bright ambient illumination

• NIGHT : Dark ambient illumination

• TEXT : For text images (Word processing etc.)

• MOVIE : For animation images in videos or movies

• PHOTO : For pictures or drawings

• USER MODE : For use under user setup image conditions

(Brightness, contrast and color tint are selected by the user in
OSD Screen Setup Menu.)

100

100

Bring up Contrast and Brightness adjustment.

:

LightView

- 7 -

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 Play 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.

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.

USB downstream Port

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

This is a simplified representation

of rear view.

To USB downstream port
of the USB compliant PC or
another hub cable

CONTROLS LOCKED/UNLOCKED :

MENU and

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.

M

MST9151

Control Board

J1

J706

J702

J705

Power Board

Main Board

- 8 -

WIRING DIAGRAM

Connector Ass’y P/N:

6631T20024B

Connector Ass’y P/N:

6631T20020Q

Connector Ass’y P/N:

6631T11012W

- 9 -

BLOCK DIAGRAM

D/S

D/S

USB

Bus-power USB

LCD Module

HUB

SS

SS
DD

DD
VV

VV
LL

LL

U/S

Micom

MTV312

DVI-D

ee

ee

ll

ll

gg

gg

aa

aa

ii

ii

aa

aa

))

))

tt

tt

tt

tt

ll

ll

gg

gg

nn

nn

o

oo

nn

nn

ee

ee

ii

ii

ll

ll

VV

rr

VV

rr

aa

aa

ee

ee

ff

ff

nn

nn

ww

ww

ff

ff

ii

gg

oo

ii

gg

oo

ii

ii

LL

LL

DD

DD

SS

((

SS

((

/TMDS )

including

MST9131B

/INPUT SWITCHING

(ADC/LVDS/SCALER

Digital Signal

5V

R,G,B

3.3V

5V

differential

Diode

3.3V

2.5V

KDS184

Reg.

3.3V

R,G,B, H/V Sync

2.5V

3.3V

D-SUB

5V

LIPS

12V

AC Input