LG FLATRON L1515S, FLATRON L1516S, FLATRON L1515SL-AL series, FLATRON L1516SL-AL series 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-32

MODEL: L1515S (L1515SL-AL**R)

L1516S (L1516SL-AL**R)

*( ) **Same model for Service

*To apply the Mstar Chip.

CONTENTS

SPECIFICATIONS

- 2 -

1. LCD CHARACTERISTICS

Type : TFT XGA LCD Module
Size : 352.0(H) x 263.5(V) x 14.0(T)
Pixel Pitch : 0.297mm x 0.297mm
Color Depth :

6bits(with FRC)/ 16M colors

Active Video Area : 15.0inch

(304.128 x 228.096)
Surface Treatment : Anti-Glare, Hard Coating (3H)
Backlight Unit : Top/Bottom edge side 2CCFL
Electrical Interface : LVDS interface

2. OPTICAL CHARACTERISTICS

2-1. Viewing Angle by Contrast Ratio

≥

10
Left : 55° min. Right : 55° min.
Top : 40° min. Bottom : 40° min.

2-2. Luminance

:

200(min.), 250(typ.) at Center point

2-3. Contrast Ratio :250(min.), 350(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 : 0~0.7 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 : 30 ~ 63kHz
Vertical : 56 ~ 75Hz

4. POWER SUPPLY

4-1. Power

100~240V, 50/60Hz 0.6A

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. MTBF : 50,000 Hours (Min.)

Lamp Life : 40,000 Hours (Min.)

6. DIMENSIONS (with TILT/SWIVEL)

(FULL Up Position)
Width : 350mm (13.78'')
Depth : 133mm (5.24'')
Height : 318mm (12.52'')

(Folded Position)
Width : 350mm (13.78'')
Depth : 64mm (2.52'')
Height : 334mm (13.15'')

7. WEIGHT (with TILT/SWIVEL)

Net. Weight : 2.5kg (5.51 lbs)
Gross Weight : 5.5kg (12.13 lbs)

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

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

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

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

WIRING DIAGRAM ................................................. 6

BLOCK DIAGRAM ................................................... 7

DESCRIPTION OF BLOCK DIAGRAM ................... 8

ADJUSTMENT ........................................................ 9

TROUBLESHOOTING GUIDE .............................. 10

PRINTED CIRCUIT BOARD................................... 14

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

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

PIN CONFIGURATION............................................22

SCHEMATIC DIAGRAM......................................... 24

MODE

POWER ON (NORMAL)

STAND-BY

SUSPEND

DPM OFF

H/V SYNC

ON/ON
OFF/ON
ON/OFF

-

POWER CONSUMPTION

less than 25 W

less than 3 W
less than 3 W

less than 3 W

LED COLOR

GREEN
AMBER
AMBER
AMBER

VIDEO

ACTIVE

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 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

- 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

35.156KHz

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

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

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

1024

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

(MAC)

(TEXT)

- 5 -

Bring up Contrast and Brightness adjustment.
:

1. Power ON/OFF Button

Use this button to turn the monitor on or off.

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.

2. MENU Button

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

3.

▼▲◀▶

Button

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

4. SELECT

/ AUTO

Button

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

FRONT VIEW REAR VIEW

OPERATING INSTRUCTIONS

D-Sub Signal
Connect

Front Control Panel

132 4

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 1024x768@60Hz.

This function optimizes the brightness, contrast or color
value to the surrounding conditions and settings and
enables you to enjoy the most suitable picture by
adjusting the surroundings (DAY/NIGHT/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 and
Color value on the On Screen Display.

See Front Control Panel

Power Connect

L1515S

L1516S

3 1

2 4

100

100

- 6 -

J706

J704

CN1

CN2

J707

J8

J1

WIRING DIAGRAM

Connector Ass’y P/N:

6631T20024B

Connector Ass’y P/N:

6631T11012R

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/UNLOCKED
:

MENU and

- 7 -

BLOCK DIAGRAM

D-SUB

MST9011

including

(ADC/LVDS/SCALER )

MTV312

Micom

LCD Module

R,G,B

differential

LVDS

(Low Voltage

Differential

Signaling)

LIPS

5V

5V

AC Input

3.3V

Reg.

2.5V

Reg.

5V

5V

12V

R,G,B, H/V Sync

3.3V

2.5V

3.3V

2.5V

DESCRIPTION OF BLOCK DIAGRAM

- 8 -

1. Video Controller Part & Display Data Transmitter Part.(MST9011)

This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to

the digital video signal using a pixel clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 80MHz.
This part consists of the Scaler.
The Scaler gets the video signal converted analog to digital, interpolates input to 1024 x 768 resolution signal and

outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller/ Transmitter are merged to one chip “MST9011” by MSTAR.
This part transmit digital signal from the Scaler to the receiver of module.

2. Micom Part

This Part consists of EEPROM IC which stores control data, Reset IC and the Micom.
The Micom distinguishes polarity and frequency of the H/V Sync are supplied from signal cable.
The controlled data of each modes is stored in EEPROM.

3. Power Part

This part consists of the one 3.3V and one 2.5 regulators to convert power which is provided 5V in LIPS Board.
5V is provided for LCD Panel and Micom part.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.

- 9 -

ADJUSTMENT

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 10 minutes.
Alignment appliances and tools.

- IBM Compatible PC

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

- E(E)PROM with each mode data saved.

- Alignment Adapter and Software.

1. Adjustment for Factory Preset Mode

1) Run alignment program for L1515/16SL on the IBM
compatible PC.

2) Select EEPROM All Init. command and Enter.

3) Display cross hatch pattern at Mode 1.

4) Select EDID WRITE command and Enter.

2. Adjustment for White Balance

1) Display color 0,0 pattern at Mode 12.

2) Set External Bright to MAX position and Contrast to
MAX Position.

3) Select PRESET START → BIAS CAL command
and Enter.

4) No attempt to manually adjust, BIAS data is auto­matically adjusted and saved to the EEPROM.

5) Display color 15,0 pattern at Mode 13.

6) Select DRIVE CAL command and Enter.

7) Color 1 (9300K) and Color 2 (6500K) are
automatically adjusted and saved to the EEPROM.

8) Select PRESET EXIT command and Enter.

Figure 1. Cable Connection

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