LG StudioWorks 560LS, LB570F-EA Service Manual

+

COLOR MONIT OR

SER VICE MANUAL

Website:http://biz.LGservice.com

E-mail:http://www.LGEservice.com/techsup.html

CAUTION

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

CHASSIS NO. : CL-18
F ACTORY MODEL: LB570F

MODEL: StudioWorks 560LS (LB570F-EA)

*( ) ID LABEL MODEL No.

CONTENTS

SPECIFICATIONS

- 2 -

1. LCD CHARACTERISTICS

Type : Color Active Matrix TFT LCD
Size : 15.1inch (38.35cm)
Pixel Pitch : 0.3mm x 0.3mm
Pixel Format : 1024 x 768 pixels (XGA)

RGB Stripe Arrangement
Color Depth : 6-bit, 262,000 colors
Active Video Area : 307mm x 230mm
Surface Treatment : Anti-Glare, Hard Coating (3H)
Backlight Unit : CCFL (Cold Cathode

Fluorescent Lamp)

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

10
Left : 60° typ., 55° min.
Right : 60° typ., 55° min.
Top : 45° typ., 40°min.
Bottom : 45° typ., 40° min.

2-2. Luminance : 200 cd/m

2

typ.

2-3. Angle at Half Luminance

Left : 75° min.
Right : 75° min.
Top : 55° min.
Bottom : 55° min.

2-4. Contrast Ratio : 200° typ.

3. SIGNAL (Refer to the Timing Chart)

3-1. Sync Signal

1) Type : Separate Sync. (Horizontal & Vertical)

2) Input Voltage Level: Low=0~0.8V, High=2.1~5.5V

3) Sync Polarity : Positive or Negative

3-2. Video Input Signal

1) Type : R, G, B Analog

2) Voltage Level : 0~0.714 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 : 31 ~ 61kHz
Vertical : 56 ~ 75Hz

4. POWER SUPPLY

4-1. Power Adaptor

Input : AC 100~240V, 50/60Hz 1.2A
Output : DC 24V 1.2A

4-2. Power Consumption

5. ENVIRONMENT

5-1. Operating Temperature: 10°C~35°C (50°F~95°F)

(Ambient)

5-2. Relative Humidity : 10%~80%

(Non-condensing)

5-3. Altitude : 0~10,000ft (3,030m)

6. DIMENSIONS (with TILT/SWIVEL)

Width : 405.2mm (15.95'')
Depth : 182.4mm (7.18'')
Height : 361.6mm (14.24'')

7. WEIGHT (with TILT/SWIVEL)

Net. Weight : 5.2kg (11.46 lbs)
Gross Weight : 7.1kg (15.65 lbs)

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

PRECAUTIONS ....................................................... 3

TIMING CHART ....................................................... 4

OPERATING INSTRUCTIONS ................................ 5

CONTROL LOCATIONS ......................................... 7

WIRING DIAGRAM ................................................. 7

DISASSEMBLY ....................................................... 8

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

DESCRIPTION OF BLOCK DIAGRAM...................12

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

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

PRINTED CIRCUIT BOARD................................... 18

EXPLODED VIEW...................................................20

REPLACEMENT PARTS LIST ...............................22

PIN CONFIGURATION............................................27

SCHEMATIC DIAGRAM......................................... 29

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

OFF

POWER OFF

H/V SYNC

ON/ON
OFF/ON
ON/OFF

OFF/OFF

-

POWER CONSUMPTION

less than 30 W

less than 3 W
less than 3 W

less than 3 W
less than 3 W

LED COLOR

GREEN
ORANGE
ORANGE
ORANGE

OFF

VIDEO

ACTIVE

OFF
OFF
OFF

-

- 3 -

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 LG 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.

CAUTION

• There is two backlight, must distinguish between
the top (upper) and the bottom (lower), and be
careful of treatment it.

• MTBF (Mean Time Between Failure) of a backlight
is about 25,000 hours.

Top (Upper) Backlight Ass’y

(P/N: 6913TZZ001D)

Bottom (Lower) Backlight Ass’y

(P/N: 6913TZZ001E)

IF BRIGHTNESS OF THE LCD MODULE DARKEN,
REPLACE THE BACKLIGHT ONE OR ALL.

TIMING CHART

- 4 -

VIDEO

SYNC

B

D

C

F

E

A

H / V

H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)

Sync

Polarity

+

–
–

+

–
–
–
–
–
–
–
–

+
+
+
+
+
+
+
+

–
–
–
–
–
–

+
+

Dot

Clock

25.175

28.322

25.175

30.24

31.5

31.5

36.0

40.0

50.0

49.5

57.2832

65

75

78.75

Frequency

31.468 KHz

70.0 Hz

31.468 KHz

70.0 Hz

31.469 KHz

60.0 Hz

35.00 KHz

66.67 Hz

37.861 KHz

72.8 Hz

37.50 KHz

75.0 Hz

35.156 KHz

56.25 Hz

37.879 KHz

60.3 Hz

48.077 KHz

72.188 Hz

46.875 KHz

75.0 Hz

49.725 KHz

74.55 Hz

48.363 KHz

60.0 Hz

56.476 KHz

70.0 Hz

60.023 KHz

75.0 Hz

Resolution

640 x 350

720 x 400

(TEXT)

640 x 480

640 x 480

640 x 480

640 x 480

800 x 600

800 x 600

800 x 600

800 x 600

832 x 624

(MAC)

1024 x 768

1024 x 768

1024 x 768

Total

Period

( E )

800
449
900
449
800
525
864
525
832
520
840
500

1024

625

1056

628

1040

666

1056

625

1152

667

1344

806

1328

806

1312

800

Video

Active

Time ( A )

640
350
720
400
640
480
640
480
640
480
640
480
800
600
800
600
800
600
800
600
832
624

1024

768

1024

768

1204

768

Blanking

Time

( B )

160

99

180

49

160

45

224

45

192

40

200

20

224

25

256

28

240

66

256

25

320

43

320

38

304

38

288

32

Sync

Duration

( D )

96

2

108

2

96

2

64

3

40

3

64

3

72

2

128

4

120

6

80

3

64

3

136

6

136

6

96

3

Back

Porch

( F )

48
60
55
34
48
33
96
39

128

28

120

16

128

22
88
23
64
23

160

21

224

39

160

29

144

29

176

28

Front

Porch

( C )

16
37
17
13
16
10
64

3

24

9

16

1

24

1

40

1
56
37
16

1
32

1
24

3
24

3
16

1

MODE

1

2

3

4

5

6

7

8

9

10

11

12

13

14

+

OPERATING INSTRUCTIONS

- 5 -

FRONT VIEW REAR VIEW

Front Control Panel

ID Label

Power (DPMS) Indicator

1. Power ON/OFF Button

This button is used to turn the monitor ON and OFF.

2. Power Indicator

This indicator lights up green when the monitor
operates normally; in DPMS (Energy Saving) mode,

-stand-by, suspend, or power off mode -its color
changes to orange.

3. AUTO/SET Button

Use this button to enter a selection in the on screen
display.

* AUTO adjustment function

Touch the AUTO button

before using OSD menu.
This button is for the automatic
adjustment of the screen position, clock and phase.

Note: Some signal from some graphics boards may not function

properly. If the results are unsatisfactory, adjust your
monitor’s Position, Clock and Phase manually.

4. OSD Select/Adjustment Buttons

Use these buttons to choose or adjust
items in the on screen display.

5. OSD Select/Adjustment Buttons

Use this button to enter and from the on screen display
(OSD).

Power ON/OFF Button

Front Control Panel

DC Power Connector

D-Sub
Signal Connector

-

+

AUTO/SET

5. OSD Button

3. AUTO/SET Button

1. Power ON/OFF Enter Button

2. Power (DPMS) Indicator

4. OSD Select/Adjustment Buttons

<Shortcut Keys>

• Brightness and Contrast can be adjusted
directly without entering the On Screen
Display (OSD) system. Touch the
buttons to adjust the settings and then the
OSD button to save all changes. The
Brightness and Contrast functions are also
available in the On Screen Display (OSD)
menu.

AUTO/SET

- 6 -

On-Screen-Display (OSD) Control

Making adjustments to the image size, position and operating
parameters of the monitor are quick and easy with the On
Screen Display Control system. A quick example is given below
to familiarize you with the use of the controls. Following section
is an outline of the available adjustments and selections you can
make using the OSD.

To make adjustments in the On Screen Display, follow these
steps:

NOTE

Allow the monitor to stabilize for at least 30 minutes before
making image adjustment.

/

AUTO

AUTO

1.

Press the Button, then the main menu of the
OSD appears.

2.

To acces a control, use the Buttons.
When the icon you want becomes highlighted, press
the AUTO Button.

3.

Use the Buttons to adjust
the item to the desired level.

4. Accept the changes by pressing the AUTO Button.

5.

Exit the OSD by Pressing the Button.

Listed below are the icons, icon names, and icon
descriptions of the items that are shown on the Menu.

Brightness

Used to adjust the brightness of the
screen.

Contrast

Adjust the display to the contrast
desired.

PRESET

RED
GREEN
BLUE

9300K/ 6500K

To appear the displays color temperature.

• 9300K:Slightly bluish white.

• 6500K:Slightly reddish white.

To set your own color levels.
To set your own color levels.
To set your own color levels.

Vertical Position

To move image up and down.

Horizontal Position

To move picture image left and right.

TRACKING

CLOCK

PHASE

LANGUAGE ENGLISH
OSD POSITION

48.3kHz / 60.0Hz
PRESET MODE

SETUP

To minimize any vertical bars or stripes
visible on the screen background.The
horizontal screen size will also change.

To adjust the focus of the display. This item
allows you to remove any horizontal noise and
clear or sharpen the image of characters.

To choose the language in which the
control names are displayed.

To adjust position of the OSD window
on the screen.

LANGUAGE

OSD POSITION

CLOCK

PHASE

COLOR

PRESET

RED
GREEN
BLUE

9300K 6500K

POSITION

61

39

BRIGHTNESS CONTRAST

88

100

- 7 -

CONTROL LOCATIONS

NO.

1
2
3
4
5
6
7

Ref. No.

S9
S3
S4
S5
S6
S7
S8

Control Function

POWER SWITCH
AUTO BUTTON
OSD

+

OSD

-

OSD RIGHT
OSD LEFT
OSD ON/OFF

WIRING DIAGRAM

CN1

CN2

P1

P2

J6

CN3

J4

J5

P3

MAIN PCB

CONTROL PCB

1

234567

- 8 -

DISASSEMBLY

(a)

1. TILT/SWIVEL REMOVAL

(1) Remove four screws (a).
(2) Remove the Tilt/swivel.

2. BACK COVER REMOVAL

(1) Remove four screws (a) from the Back Cover.
(2) Remove the Back Cover.

3. TOP SHIELD & INVERTER SHIELD REMOVAL

(1) Remove six screws (a).
(2) Remove the Top Shield.
(3) Disconnect P1. (P1: See control Board)
(4) Remove two screws (b).
(5) Release two latchs (c).
(6) Remove the Inverter Shield.

(b)

(b)

(a)

(a)

(a)

(a)

(a)

(c)

(a)

(a)

(a)

Back Cover

- 9 -

5. BACKLIGHT REMOVAL

(1) Remove two screws (a).
(2) Remove the Backlight from the LCD Module.

6. LCD MODULE REMOVAL

(1) Remove four screws (a).
(2) Separate the LCD Module from the Main Frame.

Bottom (Lower) Backlight Ass’y

Top (Upper) Backlight Ass’y

LCD Module

(a)

(a)

(a)

(a)

(a)

(a)

(a)

(d)

(d)

(a)

(a)

CN2

J6

CN3

J4

J5

(a)

(d)

(b)

(b)

(d)

(c)

(c)

4. INVERTER, POWER, CONTROL, AND MAIN PCB
ASSEMBLY REMOVAL

(1) Disconnect J4, J6 and J5.
(2) Remove four screws (a).
(3) Remove the Main PCB Ass’y.
(4) Disconnect CN2 and CN3.
(5) Remove two screws (b).
(6) Remove the Inverter PCB Ass’y.
(7) Remove two screws (c).
(8) Remove the Control and Power PCB Ass’y.
(9) Remove four screws (d).
(10) Remove the Front Cabinet..

BLOCK DIAGRAM

- 10 -

POWER CORD

15-pin D-SUB SIGNAL CABLE

POWER

SUPPLY

CONTROL PCB

INVERTER PCB

MAIN LOGIC

PCB

LCD MODULE

System Block Diagram

- 11 -

BLOCK DIAGRAM