• 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.
Page 4
TIMING CHART
- 4 -
VIDEO
SYNC
B
D
C
F
E
A
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
This Indicator lights up blue 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.
See front control panel
D-sub Connect
Power Connect
1432
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.
:
Page 6
J707
J702
CN1
CN2
CN4
CN5
CN3
Connector Ass’y :
P/N: 6631T11016C
Connector Ass’y :
P/N: 6631T20008G
Connector Ass’y :
P/N: 6631T20023A
Connector Ass’y :
P/N: 6631T20024C
Page 7
D-SUB
MST9111
including
(ADC/LVDS/SCALER )
MTV312
Micom
LCD Module
R,G,B
differential
LVDS
(Low Voltage
Differential
Signaling)
LIPS
5V
5V
5V
AC Input
3.3V
Reg.
2.5V
Reg.
5V
5V
R,G,B, H/V Sync
3.3V
2.5V
3.3V
2.5V
Page 8
DESCRIPTION OF BLOCK DIAGRAM
1. Video Controller Part & Display Data Transmitter Part.(MST9111)
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 135MHz.
This part consists of the Scaler.
The Scaler gets the video signal converted analog to digital,
interpolates input to 1280 x 1024 resolution signal and outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller/ Transmitter are merged to one chip “MST9111” 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.
Page 9
EMI
COMPONENTS
LINE
100 ~ 240V
INPUT RECTIFIER
AND FILTER
ENERGY
TRANSFER
OUTPUT RECTIFIER
AND FILTER
12V
5V
GND
SIGNAL
COLLECTI
ON
PHOTO-
COUPLER
ISOLATION
PWM
CONTROL
CIRCUIT
HVDC
100KHz
PRIMARYSECONDARY
50 ~ 60Hz
LIPS Board Block Diagram
Operation description_LIPS
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
achieve the stabilized 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.
Page 10
ADJUSTMENT
Windows EDID V1.0 User Manual
Operating System: MS Windows 98, 2000, XP
Port Setup: Windows 98 => Don’t need setup
Windows 2000, XP => Need to Port Setup.
This program is available to LCD Monitor only.
1. Port Setup
a) Copy “UserPort.sys” file to
“c:\WINNT\system32\drivers” folder
b) Run Userport.exe
c) Remove all default number
d) Add 300-3FF
2. EDID Read & Write
1) Run WinEDID.exe
2) Edit Week of Manufacture, Year of Manufacture,
Serial Number
a) Input User Info Data
b) Click “Update” button
c) Click “ Write” button
e) Click Start button.
f) Click Exit button.
Page 11
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
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
Video Signal
Generator
Figure 1. Cable Connection
SERVICE OSD
- When entering Service mode: You can check the OSD as described below by pressing down the
power key and the menu key while the power is off.
1. MODULE : Whenever you press the left/right key, the module applied to the current model will be
all module settings.
2. ADC OFFSET/ADC GAIN : Adjusts the offset and gain values that are the basis of the color coordination
displayed. When the module applied to the current set is displayed, turn the power on and off to execute
value. The result differs according to the pattern and video card signal level. These two menus are not
used separately but executed when the ADC CAL is executed.
3. ADC CAL.: Carried out when adjusting the color coordination.
4. ELAPSED CLEAR: Resets the usage time after monitor assembly to "0".
5. ELAPSED TIME: Displays the usage time after the monitor is shipped out. When executing the ELAPSED
CLEAR menu, this will be shown as "0".
6. VERSION: Displays the MICOM version of the set by model name, version name and date.
Page 12
TROUBLESHOOTING GUIDE
NO POWER
(POWER INDICATOR OFF)
CHECK J705
VOLTAGE
PIN5, PIN6 (5V)?
YES
1. NO POWER
NO
CHECK POWER
BOARD, AND FIND
OUT A SHORT POINT
AS OPENING
EACH POWER LINE
CHECK
U501 PIN 8 Voltage
(5V) ?
YES
CHECK KEY CONTROL
CONNECTOR ROUTINE
IS U201
PIN114 (3.3V)
VOLTAGE REPEATED
AS PULSE
SHAPE ?
YES
NO
NO
CHECK 5VS LINE
(OPEN CHECK)
NO PROBLEM
CHECK IIC LINE
CONNECTION
(U501, U502)
CHECK U201 VCC,
XTAL, RESET
Page 13
2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
NO RASTER
(OSD IS NOT DISPLAYED)
J705
PIN5, PIN 6
5V?
YES
J705 PIN9
5V?
YES
J705 PIN10
5V?
YES
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?
NO
NO
NO
NO
CHECK LIPS
CHECK MICOM INV
ON/OFF PORT.
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT
LIPS
YES
REPLACE CCFL LAMP
IN THE LCD MODULE
Page 14
3. NO RASTER (OSD IS NOT DISPLAYED) – MST9111
NO RASTER
(OSD IS NOT DISPLAYED)
U201
POWER PIN 8,114
3.3V?
YES
U201
PIN122, 123
OSCILLATE AS
12MHZ?
YES
U501
PIN43 IS 48KHz H-SYNC?
PIN44 IS 60Hz V-SYNC?
IS PULSE APPEARED
AT SIGNAL PINS?
AT MODE 12?
NO
NO
NO
CHECK U804
1. CHECK PIN122, 123
SOLDERING CONDITION
2. CHECK X501
3. TROUBLE IN U201
CHECK CONNECTION LINE
FROM D-SUB TO U501
YES
TROUBLE IN CABLE
OR LCD MODULE
Page 15
TROUBLE IN DPM
4. TROUBLE IN DPM
CHECK
R734, R741
(SYNC) ?
YES
CHECK
U501 PIN 24
(0V) ?
YES
TROUBLE IN PC
NO
NO
CHECK PC
PC IS NOT GOING
INTO DPM OFF MODE
TROUBLE IN
SIGNAL CABLE
Page 16
R708
C711C708
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
C228C229
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
R701R703R706
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
ZD703ZD704
C506
J703
Page 17
EXPLODED VIEW
4
1
2
3
12
10
11
13
5
6
8
9
7
Page 18
- 18 -
EXPLODED VIEW PARTS LIST
Ref. No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Part No.
3091TKL086A
6304FLP058A
or 6304FLP086A
or 6304FLP085A
or 6304FLP076A