LG Flatron L1510B User manual

COLOR MONITOR
SERVICE 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: L1510B (L1510BL-AL**R)
( ) **Same model for SVC

CONTENTS
SPECIFICATIONS
- 2 -
1. LCD CHARACTERISTICS
Type : TFT XGA LCD Module
Size : 331.0(H) x 257.9(V) x 11.0(D)
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 : 0~0.714 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 : 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)
Width : 356mm (14.01'')
Depth : 229mm (9.01'')
Height : 380mm (14.96'')
Width : 356mm (14.01'')
Depth : 291.4mm (11.47'')
Height : 103.3mm (4.06'')
7. WEIGHT (with TILT/SWIVEL)
Net. Weight : 5.1kg (11.24 lbs)
Gross Weight : 6.6kg (14.55 lbs)
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 3
TIMING CHART ....................................................... 4
OPERATING INSTRUCTIONS ................................ 5
WIRING DIAGRAM ................................................. 8
BLOCK DIAGRAM ................................................... 9
DESCRIPTION OF BLOCK DIAGRAM ................. 10
ADJUSTMENT ....................................................... 11
TROUBLESHOOTING GUIDE .............................. 12
PRINTED CIRCUIT BOARD................................... 16
EXPLODED VIEW...................................................18
REPLACEMENT PARTS LIST ...............................21
PIN CONFIGURATION............................................24
SCHEMATIC DIAGRAM......................................... 26
MODE
POWER ON (MAX)
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPM OFF
H/V SYNC
ON/ON
ON/ON
OFF/ON
ON/OFF
-
POWER CONSUMPTION
less than 30 W
less than 25 W
less than 3 W
less than 3 W
less than 3 W
LED COLOR
GREEN
GREEN
AMBER
AMBER
AMBER
VIDEO
ACTIVE
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
CFE
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)

See front control panel
- 5 -
OPERATING INSTRUCTIONS
FRONT VIEW REAR VIEW
Power Connector
D-Sub Signal Connector
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. Button
Use these buttons to choose or adjust items in the
On Screen Display.
3. Menu Button
Use this button to enter or exit 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 1024x768/60Hz.
1143 2
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.
100
100
Bring up Contrast and Brightness adjustment.
:

- 6 -
6. Control Lock(Menu button, button)
Press the 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 for 3 seconds:
the message “CONTROLS UNLOCKED”will
appear.
Ergonomic
It is recommended that in order to maintain an ergonomic and comfortable viewing position, the forward tilt angle of the monitor should
not exceed 5 degrees.
Height Range : maximun 3.39inch (86.1mm)
Landscape & Portrait : You can rotate the panel 90o clockwise.
(* For detailed information, please refer to the Pivot Sofeware CD provided.)
※Adjust the position of the panel in various ways for maximum comfort.
Tilt Range : -24˚~145˚
145˚-24˚
* Make sure not to
touch the floor
when the head
rotates to use the
Pivot function.
Positioning your display

- 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 Play 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.
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.
IMPORTANT: These USB connectors are not designed for use with high-power USB devices such as a video camera, scanner, etc.
LGE recommends connecting high-power USB devices directly to the computer.
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

- 8 -
WIRING DIAGRAM
J1
CN2
CN3
J706 J704
J705
Connector Ass’y :
P/N: 6631T11016C
Connector Ass’y :
P/N: 6631T20022G

- 9 -
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
- 10 -
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.
Also, 5V is converted 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.

- 11 -
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 L1510BL 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 13.
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 auto-
matically 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
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
1510
5
569
1
1
1
14
13
25
6
5V
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Video Signal
Generator

- 12 -
TROUBLESHOOTING GUIDE
1. NO POWER
CHECK U801.
CHECK
U801 PIN 1,
U803 PIN 3
VOLTAGE
(5V) ?
NO
NO POWER
(POWER INDICATOR OFF)
CHECK POWER
BOARD, AND FIND
OUT A SHORT POINT
AS OPENING
EACH POWER LINE
CHECK J707
VOLTAGE
PIN5, PIN6 (5V)?
NO
CHECK 5VS LINE
(OPEN CHECK)
CHECK
U802 PIN 3(3V),
U803 PIN 4(2.5V)
VOLTAGE
?
NO
CHECK IIC LINE
CONNECTION
(U501, U502)
CHECK U201 VCC,
XTAL, RESET
IS U201
PIN 42
VOLTAGE REPEATED
AS PULSE
SHAPE ?
NO
YES
YES
YES NO PROBLEM
NO
CHECK KEY CONTROL
CONNECTOR ROUTINE

- 13 -
2. NO RASTER (OSD IS NOT DISPLAYED) –LIPS
CHECK MICOM INV
ON/OFF PORT.
(U501 PIN25)
J705 PIN2
5V? NO
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK LIPS
J705
PIN5, PIN 6
5V?
NO
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT(U501 PIN41)
J705 PIN1
5V? NO
LIPS
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?
NO
REPLACE CCFL LAMP
IN THE LCD MODULE
YES
YES
YES
YES

- 14 -
1. CHECK PIN122, 123
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U201
U201
POWER PINS
3.3V?
NO CHECK U803, U801
U201
PIN122, 123
OSCILLATE AS
12MHZ?
CHECK CONNECTION LINE
FROM U201 TO U501
TROUBLE IN CABLE
OR LCD MODULE
CHECK 5VR LINE
U501 PIN8
5V?
YES
YES
YES
YES
3. NO RASTER (OSD IS NOT DISPLAYED) –MST9011
NO RASTER
(OSD IS NOT DISPLAYED)
U501
PIN41 IS 48KHz H-SYNC?
PIN42 IS 60Hz V-SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?
NO
NO
NO

- 15 -
CHECK U803, U801
U201
POWER PIN114(3.3V)
PIN111(2.5V)
?
NO
1. CHECK PC
2. CHECK SIGNAL CABLE
& D-SUB CONNECTOR
LINE
CHECK
R,G,B INPUT?
U201 PIN 33,30,28 NO
CHECK H-SYNC LINE
(D-SUB→U501 →U201
PIN126)
CHECK
H-SYNC INPUT
U201 PIN 126?
NO
YES
YES
YES
CHECK V-SYNC LINE
(D-SUB→U501 →U201
PIN127)
CHECK
V-SYNC INPUT
U201 PIN 127?
NO
YES
NO RASTER
(OSD IS DISPLAYED)
4. NO RASTER (OSD IS DISPLAYED) –MST9011
TROUBLE IN
LCD MODULE
YES

PRINTED CIRCUIT BOARD
- 16 -
R708
C711 C708
C709
J706
Q703
R709
C710
C803
R812
U802
C828
J704
C821
C822
R769
J705
Q704
R747
R748
U801
1
R744
R745
R811
R801
R802
R804
C804
C829
R749
C832
C818
1
C820
R770
R840
R846
R847
R841
U804
R803
C230
C801
C817
C221
C831
100
C819
C222 C217
90 80
C227
70
U201
J707
1
R735
U502
C516
C760
R842
R848
R844
R845
R843
R849
U803
R511
C225
C226
C219
C802
110
C223C218
60
C727
Q705
R753
R779
C732
R533
R534
R537
Q506
R510
X501
Q503
R535
R532R550
C550
X201
C228 C229
120
R739
C220 J702
50
R502
R750 R751
U501
R501
C512
C502
C503
15
R536C513
10
Q502
C501
C514
5
R592
R593
R204
R205
C211
10
1
C212
C215
20
C207
30
C208
1
40
Q505
R525
R541
20
R581
R571
R531
D707
R530
R580
R570
R520
R504
R509
R590 R591
Q701
R207
R733
R522
C216
A
Q702
R716
R740
C201
C712
C202
C203
C209
C713
C210
C714
1
R528
R529
25
C703
40
D703
R725
R705
R722
ZD702
C505
C715
D706
R717
ZD701
D701D702
R701R703 R706
R202 R203 R208 R209 R210 R240
C205 C206 C232 C233 C240 C231
R201C204
MODEL:L-CHASSIS-ANALOG
P/N :6870T628A11
DATE :2003.02.24
Q504
R515
30
R734
R540 R551
35
A
R707
R741
U702
C707
C731 C730
R723
R724
R726
R727
R523
R524
ZD703 ZD704
C506
J703
1. MAIN BOARD (Component Side)

- 17 -
1
C214
C224
C213
2. MAIN 기판 (동박측)
SW2
LED1
MODEL:L1510SL
P/N:6870T628C10
DATA:2003.01.22
SW6 SW3
SW4
R6
R4
SW7
R7
SW5
R3
R5
R1
R2
ZD1 SW1
ZD2
J1
3.CONTROL 기판 (부품측)

- 18 -
4.POWER 기판 (부품측)
5.POWER 기판 (부품측)

- 19 -
EXPLODED VIEW
3
2
10
a
11
6
5
9
7
1
8
4
b
13
14
15
21
18 16
17
19
12
20
22

- 20 -
EXPLODED VIEW PARTS LIST
Description
CABINET ASSEMBLY, L1510BL BRAND L038 .
LCD(LIQUID CRYSTAL DISPLAY), LM150X06-A3M1 LG PHILPS TFT COLOR 15.0 INCH XGA LVDS SMM
LCD(LIQUID CRYSTAL DISPLAY), LM150X06-A4C3 LG PHILPS TFT COLOR LPL
BACK COVER ASSEMBLY, L1510SL 3808TKL029 .
TILT SWIVEL ASSEMBLY, LB504J . PIVOT&2-HINGE
METAL ASSEMBLY, FRAME MAIN (L1510SL,LPL P4)
PWB(PCB) ASSEMBLY,POWER, 15" LPL(L1510SL) POWER TOTAL SPI FSP017-2PI02
PWB(PCB) ASSEMBLY,POWER, L1510SL POWER TOTAL POWERNET PWI1510LG 12V/1.2A 5V/1A LIPS FOR L-CHASSIS LPL
PWB(PCB) ASSEMBLY,POWER, ADP-30EP POWER TOTAL DELTA L1510SL LIPS
MAIN TOTAL ASSEMBLY, L1510SL BRAND CL-32
METAL, SHIELD REAR(LB504N)
CONNECTOR ASSEMBLY, 20P H-H 100MM UL20276 I/FACE CABLE LB500K
PWB(PCB) ASSEMBLY,SUB, L1510SL CONTROL TOTAL BRAND CL-32
CABLE,D-SUB, UL20276-9C(5.8MM) DT 1560MM GRAY(85964) LB500L DM
CABLE,D-SUB, UL20276-9C(5.8MM) DT 1870MM GRAY(85964) LB500K DM
CABLE,D-SUB, UL20276SB10P+2C AWG#30 DT 1870MM GRAY(85964) BRAND DM
COVER, LB504J HINGE ROTATE
COVER, LB504J STAND REAR .
COVER, LB504J HINGE BASE
PWB(PCB) ASSEMBLY,USB, LB886F SUB TOTAL BRAND CL-29
COVER, LB504J BASE TOP .
COVER, LB504J STAND FRONT WITH USB
METAL, BASE LB504J
METAL, STAND LB504J
METAL ASSEMBLY, TILT UNIT BASE HINGE
METAL ASSEMBLY, TILT UNIT PORTRAIT&UPPER HINGE
SCREW, PPB+3*8 (MSWR/FZMW1)
SCREW,DRAWING, PVS+4*10(MSWR/BK)
Part No.
3091TKL067H
6304FLP025A
or 6304FLP068A
3809TKL026Y
3043TKK095A
4951TKS091R
6871TPT242B
or 6871TPT234D
or 6871TPT236B
3313TL5061A
4950TKK424F
6631T11016C
6871TST383A
6850TD9004D
or 6850TD9004A
6866TDU002D
3550TKK264A
3550TKK266A
3550TKK268A
6871TUT015A
3550TKK267A
3550TKK265A
4950TKK444A
4950TKK443A
4951TKK089A
4951TKK088A
332-068U
332-105G
Ref. No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
a
b