LG FLATRON L2323T User manual
Model Description
MODEL BRAND
Printing Specification
1. Trim Size (Format) : 215mm x 280mm
2. Printing Colors
•Cover : LG COLOR
•Inside : Black
3. Stock (Paper)
•Cover : Snow white paper 150 g/
•Inside : Snow white paper 100 g/
4. Printing Method :
5. Bindery : Saddle stitch
6. Language : English
7. Number of pages : 69
Part No.
1.
2.
Service Guide Specification
Service Guide Specification
Changes
4.
REV.
NO. MM/DD/YY
CHANGE NO. CHANGE CONTENTS
1
2
3
4
5
7
6
SUFFIX
L2323AL
ALUKT
LG 3828TSL096C
8
Special Instructions3.
Product Name FLATRON L2323T
http://www.wjel.net
1. LCD CHARACTERISTICS
Type : TFT Color LCD Module
Active Display Area : 23inchs diagonal
Pixel Pitch : 0.13(H) x 0.39(V)
Electrical Interface : LVDS
Color Depth : 8-bit, 16,777,216 colors
Size : 528.0(W)x326(H)x34.5(D)
Surface Treatment : Anti-Glare, Hard Coating(3H)
Operating Mode : Normally Black
Backlight Unit : 12-CCFL (Cold Cathode
Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥
10
Left : -88°(Typ) Right : +88°(Typ)
Top : +88°(Typ) Bottom : -88°(Typ)
2-2. Luminance : 450 cd/m
2
(Typ)
2-3. Contrast Ratio : 400:1(Typ.)
3. SIGNAL (Refer to the Timing Chart)
3-1. Video Input
1)Signal Input : 15pin D-sub Connector/
DVI-D Connector, DVD(SCART Jack)
Composite video, S-video, HDTV(Component)
2)Input Form : RGB Analog(0.7Vp-p/75 Ω), Digital,
S-VIDEO, CVBS, YPbPr(Y, Cb, Cr)
3-2. Sync Input
Horizontal : 30 ~ 66kHz
Vertical : 56 ~ 75Hz
Input Form : Separate TTL,
Positive/Negative Composite TTL,
Positive/Negative SOG(Sync On Green)
DIGITAL
4. Max.Resolution
Analog -1280 x 1024@60Hz
Digital(DVI-D) -1280 x 1024@60Hz
5. POWER SUPPLY
5-1. Power Adaptor
Display
Input : DC 24V 4A, DC5V 0.5A
Media station
Input : AC 100~240V, 50/60Hz , 1.5A
Output : DC 24V 4A, DC 5V 0.5A
5-2. Power Consumption
6. ENVIRONMENT
6-1. Operating Temperature: 10°C~35°C (50°F~95°F)
(Ambient)
6-2. Relative Humidity : 10%~80%
(Non-condensing)
6-3. MTBF : 50,000 Hours(Typ.)
7. DIMENSIONS
Display(with TILT/SWIVEL)
Width : 587.5 mm (23.13'')
Depth : 260 mm (10.24')
Height : 446.5 mm (17.58'')
Media Station
Width : 129.6 mm (5.10'')
Depth : 191.6 mm (7.57')
Height : 20.57 mm (8.09'')
8. WEIGHT
Display(with Tilt/Swivel) : 7.70kg (16.98 lbs)
Media station : 2.7kg (5.95 lbs)
CONTENTS
SPECIFICATIONS
- 2 -
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 4
TIMING CHART ....................................................... 5
OPERATING INSTRUCTIONS ................................ 6
BLOCK DIAGRAM ................................................. 13
DESCRIPTION OF BLOCK DIAGRAM...................14
ADJUSTMENT ...................................................... 15
TROUBLESHOOTING GUIDE .............................. 16
WIRING DIAGRAM ................................................23
EXPLODED VIEW(DISPLAY) .................................24
EXPLODED VIEW(MEDIA STATION).....................26
REPLACEMENT PARTS LIST ...............................28
PIN CONFIGURATION............................................41
SCHEMATIC DIAGRAM......................................... 46
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPM OFF
POWER OFF
POWER CUT OFF S/W OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
-
-
POWER CONSUMPTION
less than 110 W
less than 5 W
less than 5 W
less than 3 W
less than 3 W
less than 1 W
LED COLORVIDEO
ACTIVE
OFF
OFF
OFF
-
-
BLUE
AMBER
AMBER
AMBER
OFF
OFF
BLUE
DARK BLUE
DARK BLUE
DARK BLUE
DARK BLUE
OFF
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- 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. Data2-
T. M. D. S. Data2+
T. M. D. S. Data2/4 Shield
T. M. D. S. Data4-
T. M. D. S. Data4+
DDC Clock
DDC Data
Analog Vertical Sync.
T. M. D. S. Data1-
T. M. D. S. Data1+
T. M. D. S. Data1/3 Shield
T. M. D. S. Data3-
T. M. D. S. Data3+
+5V Power
Ground
(return for +5V,
H. Sync. and V. Sync.)
Pin Signal (DVI-D)
18
9
17 24
16
16
17
18
19
20
21
22
23
24
Hot Plug Detect
T. M. D. S. Data0-
T. M. D. S. Data0+
T. M. D. S. Data0/5 Shield
T. M. D. S. Data5-
T. 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
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- 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.
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TIMING CHART
- 5 -
VIDEO
SYNC
C
E
DF
A
B
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
H + 31.47 800 640 16 96 48
V–70.09 449 350 38 2 60
H–37.5 840 640 16 64 120
V–75 500 480 1 3 16
H–31.47 900 720 18 108 54
V + 70.08 449 400 13 2 34
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+/–63.98 1688 1280 48 112 248
V+/–60.02 1066 1024 1 3 38
Mode H/V
Sort
1
2
3
4
5
6
7
8
9
10
11
25.175
25.175
31.5
28.324
40.0
49.5
57.283
65.0
78.75
79.50
108.0
640x350
70Hz
720x400
70Hz
640x480
75Hz
640x480
60Hz
800x600
60Hz
800x600
75Hz
832x624
75Hz
1024x768
60Hz
1024x768
75Hz
1280x768
60Hz
1280x1024
60Hz
H–31.47 800 640 16 96 48
V–59.94 525 480 10 2 33
Sync
Polarity Frequency
Dot
Clock Total Period
(A)
Video Active Time
(B)
Sync Duration
(E)
Back Porch
(D)
Front Porch
(F)
Resolution
H + 47.78 1664 1280 64 128 192
V + 59.87 798 768 3 7 20
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OPERATING INSTRUCTIONS
- 6 -
FRONT VIEW
MEDIA STATION REAR VIEW
SIDE VIEW
Front Control Panel
AV1 AV2
(Video)
1. Connect the P&D cable
2. Connect to the speaker including a built-in
amplifier(AMP)
3. AV Input ports
4. PC signal inputs
5. Connect the audio cable to the *LINE OUT jack
of the PC sound card.
6.Connect the SCART cable
7. Power cut-off switch of the monitor
Connect various cables and the power cord and turn on
before using the monitor. Please turn the monitor off if you
intend not to use it for an extended period of time to
reduce power consumption.
8. HDTV(YPbPr) Input ports - 576p/720p/1080i
9. Connect the antenna cable (not included)
10.Connect the power cord
2
1
8
4
5
6
7
3
910
Fan: Should the temperature of the media station rise
above a preset level, the fan will start up
automatically to cool down the unit.
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1. Remote Control Sensor
2. Power Button
Use this button to turn the display on or off.
<Power (DPMS) Indicator>
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.
3. Source Button
Use this button to select an input signal
4. PIP Button
The sub-screen is changed in the
order shown below.
: SMALL -> LARGE -> OFF
The positions of SOURCE 1 and
SOURCE 2 can be transposed by
selecting SWAP on the remote control.
5. POP Button
The sub-screen is changed in the
order shown below.
: POP1 -> POP2 -> POP3 -> POP4 ->
OFF
The positions of SOURCE 1 and
SOURCE 2 can be transposed by
selecting SWAP on the remote control.
6. MENU Button
Use this button to enter or exit On Screen Display.
7. PR. -/PR+, VOL. -+
Use these buttons to choose or adjust items in the
On Screen Display.
8. AUTO Button
- 7 -
Front Control Panel
3 4 5 6 7 8 2 1
•DSUB ANALOG:
15-pin D-sub analog signal
•DVI-D DIGITAL: DVI-D digital signal
•HDTV YPbPr: HDTV
•S-VIDEO: S video
•AV1(SCART): SCART
•AV2(VIDEO): VIDEO
•TV:TV
•
Bring up Contrast and Brightness
adjustment. It is available to the PC signal
inputs only.
VOL. - / VOL. +
Use these buttons to decrease or
increase the volume level.
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). It is available to
the PC signal inputs only.
The best display mode is 1280x768 @60Hz.
Use this to enter a selection in the On Screen Display.
CONTROLS LOCKED/UNLOCKED :
MENU and VOL.+
This function allows you to secure the
current control settings, so that they
cannot be inadvertently changed.
Press and hold the MENU button and
VOL.+
button for 5
seconds: the message “CONTROLS LOCKED” appears.
You can unlock the OSD controls at any time by pushing
the MENU button and
VOL.+
button for 5 seconds:
the message “CONTROLS UNLOCKED” will appear.
PR. - / PR. +
PR. - / PR. + : To adjust the brightness
VOL. - / VOL. + : To adjust the contrast
•Use these buttons to go up and down the
channel when the TV source is available.
PR. - / PR. +
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- 8 -
SVC OSD
1) Turn off the power switch at the front side of the display.
2) Wait for about 5 seconds and press MENU, PR+ and VOL+ with in 1 second interval.
3) The SVC OSD menu contains additional menus that the User OSD menu as described below.
a) ELAP. TIME CLEAR: Displays or clears the used time.
b) AUTO GAIN/OFFSET: Automatically sets the gain and offset value. (Pattern is used for D-Sub
window pattern.)
c) AUSTRALIA TV: The default value is off. When watching the Australian TV, turn it on.
d) R/G/B-GAIN: Allows you to set the R/G/B gain value manually.
e) R/G/B-OFFSET: Allows you to set the R/G/B-OFFSET value manually.
f) FAN: The default value is set to Auto. If set to Auto, the fan runs according to the surrounding
temperature. If set to On, the fan will run indefinitely as long as the power is on. (You can use this
option to check fan operation status. Make sure to set to Auto after inspection.)
g) TXT LANG: Set the proper text language (0~16).
h) RESET: The default value is set to Off. You can change the setting only after setting on after SVC
OSD menu change.
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- 9 -
Remote Control
I/II
TV/AV
*
/SSM
AUTO
TEXT SLEEP MODE
UPDATE LIST TIME
SIZE Q.VIEW MIX
HOLD
INDEX
APC/PSM REVEAL
SWAP
PR
VOLVOL
PR
OK
M
X
?
i
MUTE
To select mute on or off.
POWER
Use this button to turn the display on or off.
MENU
Use this button to enter the On Screen Display menu.
EXIT
Use this button to exit the On Screen Display menu.
* / SSM (Sound Status Memory)
The audio will be automatically calibrated according
to the type of the playback video.
•Flat: The most commanding and natural audio.
•Music: Select this option to listen to music.
•Movie: Select this option to watch a movie.
•Speech: Select this option to ~ ..................
•User: Select this option to use the user-defined
audio settings.
SOURCE
Use this button to select an input signal.
TV/AV :
TV/AV button
I/II : Bilingual choice and sound mode
selection
Press this button
to switch from Stereo to Mono sound in case
of stereo transmission, or from Nicam Stereo
to Nicam Mono, in case of digital
transmission.
to switch from Nicam Dual Ito Nicam Dual II
or Nicam Dual I-II in case of Nicam Dual
transmission.
to choose between Dual I, Dual II or Dual I-II
in case of bilingual transmission :
Dual I sends the primary broadcast language
to the loudspeakers ;
Dual II sends the secondary broadcast
language to the loudspeakers ;
Dual I-II sends a separate language to each
loudspeakers.
NOTE : In case of weak stereo sound signals, with
stereo or Nicam stereo transmission, select mono
reception.
PR ( ) Buttons
VOL ( ) Buttons
OK Button
Number buttons
For detailed instructions of each button on the remote control, refer to the appropriate pages of
this manual.
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- 10 -
Remote Control
AUTO
TEXT SLEEP MODE
UPDATE LIST TIME
SIZE Q.VIEW MIX
HOLD
INDEX
REVEAL
SWAP
PR
VOLVOL
PR
OK
M
X
?
i
*
/SSM
APC/PSM
AUTO Button
•
This function is to automatically search the
available channels. It is available to the TV signal
inputs only.
•
This function is to automatically adjust your
display image to the ideal settings for the current
screen resolution size (display mode). It is
available to the PC analog signal input only.
SWAP function
To switch the main-screen and sub-screen in
PIP/POP mode.
SLEEP : SLEEP Timer
You can set a time period after which the
HDTV/S-VIDEO/AV1/AV2 /TV should switch itself
to standby. Press the key repeatedly to select the
number of minutes.
LIST : Programme list
To display the programme list (0~ 99).
Q.VIEW : QUICK VIEW Button
To display the previously selected TV channel.
APC (Auto Picture Control)
Use this button to select a screen color.
9300K <--> 6500K
The default color is 9300K. This function is not
supported in PC mode.
•9300K: Slightly bluish white.
•6500K: Slightly reddish white.
Note: TV channels displayed in blue have been
setup to skipped in the PR. EDIT menu
0
1
2
3
C 01
C 04
C 25
4
5
6
7
8
9
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- 11 -
Remote Control-PIP/POP Function
AUTO
TEXT SLEEP MODE
UPDATE LIST TIME
SIZE Q.VIEW MIX
HOLD
INDEX
REVEAL
SWAP
M
X
?
i
APC/PSM
PIP
POP
SWAP
When the signal of SOURCE 1 is supplied to
the main-screen, the sub-screen receives
the signal of SOURCE 2 only. Conversely,
when the signal of SOURCE 2 is supplied to
the main-screen, the sub-screen only
receives the signal of SOURCE 1. The
positions of SOURCE 1 and SOURCE 2 can
be transposed by selecting SWAP.
PIP (Picture in Picture)
The sub-screen is changed in the order shown
below.
: SMALL -> LARGE -> OFF
POP (Picture out Picture)
The sub-screen is changed in the order shown
below.
: POP1 -> POP2 -> POP3 -> POP4 -> OFF
SOURCE 2
SOURCE 1
AV
AV
DVI-D
DVI-D
HDTV
HDTV
TV
TV
D-SUB
D-SUB
S-VIDEO
S-VIDEO
1024x768
256x192
POP1
800x600
480x360
POP2
POP3
640x768 640x768
640x480 640x480
POP4
The POP4 menu will not be supported if the input
signal is HDTV and/or above 720p.
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- 12 -
TEXT
To select the teletext on or off. The main index page or the last
selected page appears on the screen together with an
information headline and an option line at the bottom of the
screen.
UPDATE
Press the button to appear the TV programme. At the top of
screen indicates that you are still in the teletext mode. Before
interrupting teletext, you may select a page number. When the
page has been found, the information line appears briefly on
your screen. Press the botton again to reappear teletext.
SIZE
Press the button repeatedly to display the upper part, the lower
part and then to return to the normal page size. When the
upper part is displayed, you can scroll the text, line by line
using the buttons.
HOLD
Press the button to stop the automatically rotating of the
subpages. Press the button again to continue the automatic
rotating again.
INDEX
To display the main index.
AUTO
TEXT SLEEP MODE
UPDATE LIST TIME
SIZE Q.VIEW MIX
HOLD
INDEX
REVEAL
SWAP
PR
VOLVOL
PR
OK
M
X
?
i
*
/SSM
APC/PSM
Remote Control-TELETEXT Function
MODE
The mode will be switched in the Teletext mode.
TIME
When viewing a TV programme, press this button to display
the time at the top right hand corner of the screen. Press
this button again to remove the display. In the teletext mode,
press this button to select a sub page number. The sub
page number is displayed at the bottom of the screen. To
hold or change the sub page, press the RED/GREEN,
or NUMBER buttons. Press again to exit this function.
MIX
Display the teletext pages superimposed on the TV picture.
To switch the TV picture off press this button again.
REVEAL
Press the button to reveal/conceal the hidden information,
such as solutions to riddles and puzzles. Press this button
again to remove the information from the display.
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BLOCK DIAGRAM
- 13 -
Main Video
Input
AC IN
Power
control
5VST
24VS
24VM
D-Rx,D-Tx
Tele-txt
&
I2C
Sub Video
Input
8MB 8MB
Frame Buffer
Memory(SDRAM)
5VC
2.5V
5VST
LCM/Inverter/etc . Control signal
Scaler
(MX88L285U)
D-SUB DVI-D Display
Output
ADC
(AD9888
140MHz)
ADC
(AD9883
140MHz)
Power
control
VideoOut
CONNECTING
B/D
SCALER
B/D
POWER
B/D
8MB
Frame Bu Audio-In/Out
Video-In/Out
ffer
Memory(SDRAM)
S-Video
2.5V
5VC
24VS
5VST
DC/DC
(LM2676-5V)
DC/DC
(LM2596-5V)
DC/DC
(LM2596
Adjustable)
Video
Out
Deinterlacer
(FLI2310)
VideoDecoder
(VPC3230D)
Tun er
AV B/D
Flash
ROM
(256KB)
Source
Flash
ROM
(512KB)
OSD
MCU
(89C662)
8bit
Latch
Audio Decoder
(MSP3410G-C12)
SIF
VIF
24V-AMP
5VA
TMDS RX
(SIL161B)
LVDS TX
(THC63LVDM)
23inch
WXGA
LCD Module
(1280 X 768)
&
Inverter
24VI
24VI
LVDS
CONTROL
5VST Remote
Remote
5VST
AUDIO
B/D
BRIDGE B/D
KEY CONTROL B/D POWERKEY B/D
DTV(576p~1080i)
TVTEXTPRO
(SDA555X)
YPbPr
I2C
DTV
Audio in
16MB
AV
Audio
in
PC
Audio
in
SCART(AV1)
Audio-Out
Audio-Out
DC/DC
(LM2676-12V) LVDM+12V
SPIN(23.0)
YPbPr
Y/C
CVBS(AV2)
CVBS IN
VPC-Y/C
(7..0)
AVSCALER
74ALVC162839
74ALVC162839
74ALVC162839 24BIT AV PIN(15..0)
MPINA(
23
..
0
)
AV PIN
(15..0)
MPINA(
15
..
0
)
HPTVIN(
15
..
0
)
15
..
0
)
SPIN(
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- 14 -
DESCRIPTION OF BLOCK DIAGRAM
1. Input Selection Circuit
This block is composed of 74VHCT126A(U10)and
peripheral devices. There are two inputs, Analog and
Digital H/V Sync.
74VHCT126A(U10) chooses one input and outputs
selected input through sync selection pin (Pin1,4,13).
2. A/D Converter
This block is composed of AD9888 (U12) and
peripheral devices. AD9888(U12) includes A/D
converter, Pre-amp, and PLL.The basic RGB signal
(0.7Vp-p) is input to R,G,B pin of AD9888(U12).
Input video signal is amplified, Phase locked , A/D
converted to 8bits digital signal by this IC(U12) And
send the Digital video signal to MX88L285(U201).
U12 makes clock for MX88L285(U201)
3. TMDS Receiver
This Block is composed of SiI161B (U2) and
peripheral devices.
This ICs decodes TMDS Input signal from DVI-D Pin
(J1) and make 8bit digital signal to send Digital signal
to MX88L285(U201).
4. DDC controller
This block is composed of P89C662(U43) and
peripheral devices. P89C662(U43) controls peripheral
devices through IIC line.
Major functions are (1) to control Flash memory
through DDC-SCLA, DDC-SDAA of D-sub And (2) to
store EDID data in the EEPROM (U34,U49)
5. Video Decoder
This block is composed of VPC3230D(U601) and
peripheral devices.
P89C662(U43) controls this IC through IIC Line. This
IC analyzes input signal of CVBS, Y/C, Y/Pb/Pr and
output analyzed signal (8bit interlace signal) to De-
interlace block.
Analyzed signal has video control signals like
Contrast, Brightness, Sharpness, Color signals
Including Adaptive Comb Filter.
6. DTV Circuit
This block is composed of AD9883(U14) and
peripheral devices. AD9883(U14) includes A/D
converter, Pre-amp, and PLL.
Input video signal is amplified, Phase locked , A/D
converted to 8bits digital signal by this IC(U14) And
send the Digital video signal to MX88L285(U201).
U14 makes clock for MX88L285(U201)
7. Audio Decoder
This block is composed of MSP3410G (U3) and
peripheral devices. P89C662(U43) controls this IC
through IIC Line.
This IC analyzes Audio input signal through A/V Jack
and PC audio, DVD/ DTV(SCART Jack) audio.
8. De-interlacer
This block is composed of FLI2310(U302) and
peripheral devices.
P89C662(U43) controls this IC through IIC Line. And
this IC convert 8 Bit Interlace Y/UV signal to
Deinterlace signal.
It output converted signal to Format Converter
MX88L285(U201).
9. Format Converter
This block is composed of MX88L285(U201),
MX29LV004B(U28), EM638325(U26,U27) and
peripheral devices. P89C662 controls this IC through
parallel line.
MX88L285(U201) processes outputs of A/D
Converter and TMDS Receiver, DTV circuit, De-
interlace output and output processed 48 Bit Digital
signal to LVDS Transmitter THC63LVDM83(U801).
MX88L285(U201) is Format Converter IC that receive
Digital signal and output proper frame signal to LCD
Module(1280X768).
10. Panel-Link Circuit
LVDS Transmitter THC63LVDM83(U801) is the IC
that receives output digital signal of MX88L285(U201)
and output to LCD Module.
The signal format is Panel-link. LCD Module has
Panel-link receiver that is same output of
MX88L285(U201).
This is the best for reduction EMI problem and the
number of pin connector.
11. DC/DC Converter block
DC/DC Converters convert the input 24V to proper
2.5V, 3.3V, 5V, 8V for main board. For shooting heat
trouble, we use the DC/DC converting IC.
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- 15 -
ADJUSTMENT
DVI-D Connector
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
V-Sync On/Off Switch
(Switch must be ON.)
F
A
B
C5V
E
F
A
B
C
1510
5
569
1
1
1
14
13
25
6
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Figure 1. Cable Connection
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
e) Click Start button.
f) Click Exit button.
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
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- 16 -
TROUBLESHOOTING GUIDE
1. OUT OF ORDER ON POWER
Check Ctrl signal
‘PCB-PWR’
NO POWER
(POWER INDICATOR OFF)
Replace
the Power B’d
Check Stand-by
5V on Power B’d
Check
Connector or
5V Output
On Power B’d
Check
24V Output
On Power B’d
Fail
Fail
Fail
Replace
the Power B’d
Fail
Check
Reset signal for U43
(AV B’d :
U801 Pin#8)
Check
DC/DC Converter
Output
Check Device
AV B’d
:U803,U804,U805
Bridge B’d : U905
Fail
Check
I2C Line
NCTL & PCTL
Level : >4V
& D-SCL, D-SDA,
M-ACK,
S-ACK
Check Device
Main B’d :
U3,U4,U43,U44,U12
AV B’d : U702
Bridge B’d : U904
Key-control B’d : U1,U2
Check Device
Main B’d :
U3,U4,U43,U44,U12
Check Device
AV B’d : U601,U302
Audio B’d : U25, U3
Trouble
On D-SCL, D-SDA,
M-ACK, S-ACK
*Check the PND
Cable connection
*Check the B’d to B’d
connection
Fail
Pass Pass
Pass
Pass
Pass
Pass
Pass
Check Point
(U43 Pin2, 3, 4, 5 )
Trouble
on NCTL
Trouble
on PCTL
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- 17 -
2. NO RASTER STATE
Check
U12(AD9888)
.MHS
.MVS
.MCLK
.DATA
NO RASTER ON ANALOG
SIGNAL
Replace Device
Main B’d :
U801, U4
Check
Power Line
(U801)
Check LED
Status on
Display Head
Check
Ctrl signal
U801 Pin#32
(LVDS PDWN)
Blue 3.3V LOW
Replace Device
Main B’d
: U201,U801
Replace the
U201(Scaler)
Find a
Soldering Error
or check the
oscillator(X6)
*Check the DTV Jack
Connection
- Y/Pb/Pr Jack check
*Check the other Device
- U26,U27(SDRAM)
- U2,U17(TMDS Receiver)
Check
Scaler(U201)
Output
. LHSYNC
. LVSYNC
. LCKA
. DATA
Fail
Fail
High
*Check Connector
*Check Ctrl Signal
of Module &
Inverter
Check
Inverter or
LCD Module Fail
Fail
Fail
Replace Device
Main B’d :U12
Amber
Pass
Pass
Pass
‘A’Process
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