BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Page 2
CONTENTS
SPECIFICATIONS
1. LCD CHARACTERISTICS
Type: TFT Color LCD Module
Size: 335.0(H) x 273.5(V) x 11.2(D)
Pixel Pitch: 0.243mm x 0.243mm
Color Depth: 8-bit, 16,777,216 colors
Active Video Area: 15.7inch (39.88cm)
(39.832diagnal 311mm x 284.8mm)
Surface Treatment : Anti-Glare, Hard Coating (3H)
Backlight Unit : Two-CCFL (Cold Cathode
Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥
10
Left: 60° typ., 60° min.
Right: 60° typ., 60° min.
Top: 45° typ., 45° min.
Bottom: 45° typ., 45° min.
2-2. Luminance: 200 cd/m
2
typ.
2-3. Angle at Half Luminance
Left: 45° min.
Right: 45° min.
Top: 45° min.
Bottom: 45° min.
2-4. Contrast Ratio: 250 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 ~ 80kHz
Vertical: 56 ~ 85Hz
4. POWER SUPPLY
4-1. Power Adaptor
Input : AC 100~240V, 50/60Hz 1.2A
Output : DC 24V 1.2A
• 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 Gate Way. 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: 6913TZZ003A)
Bottom (Lower) Backlight Ass’y
(P/N: 6913TZZ003B)
IF BRIGHTNESS OF THE LCD MODULE DARKEN,
REPLACE THE BACKLIGHT ONE OR ALL.
Page 4
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)
H (Pixels)
V (Lines)
H (Pixels)
V (Lines)
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.Button
Use these buttons to choose or adjust items in the on screen
display.
4
AUTO/SET Button
Use this button to enter a selection in the on screen display.
5. OSD Button
Use this button to enter or exit the on screen display.
Buttons
OSD Button
AUTO/SET Button
Power Button
Power Indicator
DC Power Connecter
-
+
D-Sub Signal
Connector
154
3
2
100
100
<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 adjustment function
Touch the AUTO/SET 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 areunsatisfactory, adjust your monitor’s Position, Clock
and Phase manually.
PROCESSING
AUTO CONFIGURATION
Page 6
On-Screen-Display (OSD) Control
88
100
BRIGHTNESS CONTRAST
9300K 6500K
COLOR
PRESET
RED
GREEN
BLUE
RGB
61
39
POSITION
To adjust an image size, position, and operating
parameters are quick and easy with the On-ScreenDisplay control system, using the OSD button and the
Adjustment control button. A quick example is given below
to familiarize you with use of the controls.
Example;
Note:
Allow the monitor to stabilize for at least 30 minutes
before making image adjustment.
To make adjustments in the On Screen Display, follow these
steps:
Listed below are icons, icon names, and icon descriptions
of the OSD menu.
BRIGHTNESS CONTRAST
Brightness
Used to adjust the brightness of the
screen.
Contrast
Adjust the display to the contrast
desired.
COLOR
1. Press the OSD Button, then the main menu of the OSD
appears.
2.
To acces a control, use the or Buttons. When the icon
you want becomes highlighted, press the AUTO/SET Button.
3.
Use the Buttons to adjust the item to the desired
level.
4.
Accept the changes by pressing the AUTO/SET Button.
5.
Exit the OSD by Pressing the OSD Button.
PRESET
RED
GREEN
BLUE
POSITION
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.
Page 7
TRACKING
TRACKING
CLOCK
PHASE
LANGUAGEENGLISH
FULL
OSD POSITION
48.3kHz / 60.0Hz
PRESET MODE
MODE INFOON
IMAGE SIZE
SETUP
SETUP
CLOCK
PHASE
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.
LANGUAGE
To choose the language in which the
control names are displayed.
IMAGE SIZE
This function displays the image in its
original size or enlarged size so as to
fit in the full screen of the LCD panel.
OSD POSITION
To adjust position of the OSD
window on the screen.
MODE INFO
There is information of video modespreset and user modes.
Page 8
CONTROL LOCATIONS
CN3
J10
J4
J2
CN2
CN1
J301
MAIN PCB
CONTROL PCB
125
67
3
4
WIRING DIAGRAM
NO.
1
2
3
4
5
6
7
Ref. No.
SW301
SW304
SW303
SW306
SW302
SW307
SW305
Control Function
OSD BUTTON
ADJUST LEFT
ADJUST UP
ADJUST DOWN
ADJUST RIGHT
AUTO/SET
POWER SWITCH
Page 9
DISASSEMBLY
(a)
(a)
(a)
(a)
(a)
(a)
(a)
(a)
1. TILT/SWIVEL REMOVAL
(1) Remove two screws (a).
(2) Remove the Tilt/swivel.
(a)
2. BACK COVER REMOVAL
(1) Remove four sheet (a) from Back Cover.
(2) Remove four screws (b) from the Back Cover.
(3) Remove the Back Cover.
Back Cover
(b)
(a)
(b)
(a)
3. METAL REAR ASSEMBLY REMOVAL
(1) Remove eight screws (a).
(2) Remove the Metal rear Ass’y.
4. CONTROL, MAIN PCB ASSEMBLY
REMOVAL
(1) Disconnect J2, J4 and J10.
(2) Remove four screws (a).
(3) Remove the Main PCB Ass’y.
(4) Remove three screws (b).
(5) Remove the Control PCB Ass’y.
J2
J4
J10
(b)
(b)
(a)
(b)
(a)
(a)
(a)
Page 10
(b)
(b)
(b)
(b)
(b)
(a)
5.METAL FRAME ASSEMBLY
REMOVAL
(1) Remove five screws (a).
(2) Remove six screws (b).
(a)
(3)Remove theMetal Frame Ass’y
(b)
5. INVERYTER REMOVAL
(1) Disconnect CN2,CN3 .
(1) Remove two screws (a).
(2) Remove the Inverter.
CN3
(a)
(a)
(a)
6. BACKLIGHT REMOVAL
(1) Remove two screws (a).
(2) Remove the Backlight from the LCD Module.
LCD Module
Top (Upper) Backlight Ass’y
(a)
CN2
(a)
(a)
(a)
Bottom (Lower) Backlight Ass’y
Page 11
D-SUB
Video Controller
MX88L282
LVDS
(LVDS83)
LVDS
(LVDS83)
Memory
(KM416S102BT)
H-Sync
A/D
converter
AD9884
M-CLK
Out - CLK
DE ,H/V Sync out
R,G,B odd
Out - CLK
DE ,H/V Sync out
R,G,B Even
LCD Module
R,G,B
differential
L VDS:Low Voltage Differential Signaling
Data 48 BitAddress
H-Sync
R,G,B
3.3V
3.3V
3.3V
ADC CLK
ADC CLK
R,G,B
even, odd
Micom
68HC08-BD48
Inverter CTL
Module CTL
V-Sync
Power CTL
H-Sync
3.3V
Inverter
24V
DC-DC
Converter
3.3V
Reg.
3.3V
24V Input
5.0V
5.0V
Video Signal
3.3V
3.3V
Page 12
DESCRIPTION OF BLOCK DIAGRAM
- 12 -
1. Pre-amp/ ADC / PLL Part.
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.
2. Video Controller Part.
This part consists of the Scaler and frame buffers which converts frame rate of input signal to 60Hz frame rate.
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.
3. Display Data Transmitter Part.
This part transmit digital signal from the Scaler to the receiver of module.
4. Power Part.
This part consists of the DC/DC converter and several 3.3V regulators .
The DC/DC converter coverts 24V to be entered power adapter to 5V.
5V, output of DC/DC converter, supply to the micom and 3.3V regulators.
The output voltage of 3.3V regulator supply to IC of each part.
5. 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 mode is stored in EEPROM.
6. Inverter
The inverter converts from 24V to AC 700Vrms and drive back-light lamp of module.
Page 13
ADJUSTMENT
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
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 FPD1570 on the IBM
compatible PC.
2) Select EEPROM all clear command and Enter.
3) Display cross hatch pattern at Mode 1.
4) Select COMMAND PRESET START command.
5) Select FOS DEFAULT command and Enter.
6) Press "Y" key, it will automatically save all FOS data
to EEPROM.
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 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
Page 14
TROUBLESHOOTING GUIDE
NO POWER
(POWER INDICATOR OFF)
1. NO POWER
CHECK U15
INPUT VOLTAGE
(24V) ?
YES
CHECK
5VST VOLTAGE
(5V) ?
YES
CHECK
U4 PIN 6.
IS THIS PIN
OSCILLATED?
NO
NO
NO
TROUBLE IN
ADAPTOR or
INVERTER
TROUBLE IN
U15
TROUBLE IN
U4 or X2
YES
TROUBLE
SOMEWHERE ELSE
Page 15
NO RASTER
2. NO RASTER
CHECK
J4 PIN 10
(24V) ?
YES
CHECK
J4 PIN 5 (5V) ?
YES
CHECK
U4 PIN 42
H. PULSE ?
YES
CHECK
U5 PIN 117
H.PULSE?
YES
NO
NO
NO
NO
TROUBLE IN
POWER ADATER
TROUBLE IN
INON PATTERN
TROUBLE IN
U106, U105, U101,
U109
TROUBLE IN
U5
CHECK
U5 PIN 115
AD CLOCK ?
YES
NO
TROUBLE IN
U5
Page 16
YES
CHECK
U1 PIN 254
DOT CLOCK ?
YES
CHECK
MEMORYCLK
U6, U7, U8
PIN 35 ?
YES
CHECK
U1 PIN 93, 94
DOT CLOCK ?
YES
NO
NO
NO
CHECK
ADC-CLK PATTERN
TROUBLE IN
U1
TROUBLE IN
U1
CHECK
U1 PIN 124
D26 (H.PULSE) ?
YES
NO
TROUBLE IN
U1
Page 17
YES
CHECK
U2, U11 PIN 27
H.PULSE ?
YES
CHECK
U2, U11 PIN 28
V.PULSE ?
YES
CHECK
U2, U11 PIN 31
DOT CLOCK?
YES
CHECK
U2, U11 PIN 30
H.PULSE?
NO
NO
NO
NO
TROUBLE IN
U1
TROUBLE IN
U1
TROUBLE IN
U1
TROUBLE IN
U1
YES
TROUBLE IN
LCD MODULE
Page 18
NO DOT CLOCK
YES
3. NO CLOCK (CLOCK GENERATOR)
CHECK
U5Vcc
3.3V ?
CHECK
U5 PIN 115
CLOCK ?
YES
NO
NO
TROUBLE IN
U23
TROUBLE IN
U5
Page 19
TROUBLE IN DPM
CHECK
U617 (MICOM)
PIN 1, 42 (H/V INPUT)
SIGNAL ?
YES
4. TROUBLE IN DPM
NO
TROUBLE IN
U17
CHECK
U4 PIN 6
WAVEFORM
(24MHz) ?
YES
CHECK
U4 PIN 26
(5V) ?
YES
TROUBLE IN PC
NO
NO
TROUBLE IN
X2
TROUBLE IN
SIGNAL CABLE
Page 20
C66
C62
C47
R13
R20
J2
U23
U20
U19
U13
R12
C150
C209
C35
R15
C1
C49
R101
C65
C201
R104
U2
BA18
C151
C153
C152
U11
C175
C174
CA17
C50
BA36
R103
C193
C194
R100
C64
R64R63
L5
C235
L24
C234
L6
C99
J5
BA19
BA20 BA21 BA22 BA23 BA24 BA40 BA41
BA43BA42
BA45
BA44
X1
CA11
CA18
BA30
BA33
R76
C73
C74
60
50
D5
C3
R98
C198
C195
C63
R102
R62
C233
R66
R65
Model:LB680A Ver:1.3
U8
P/N:6870T285A10
Date:2000.09.20
BA7
120
110
100
90
70
R16
C15
CA12CA15
C13
BA27BA35
70
30
D4
D3
ZD2
ZD1
BA8
BA9
140
130
6050
CA16CA9
BA29RA32
90
80
20
U6
BA12
BA11
BA10
160 150
40
30
CA10CA13
BA26BA34
U5
100
51
10
BA14
BA13
BA15
170
2010
CA14
CA7
BA28
BA31
L3
120
110
C72
125
D1
D2
BA16
BA17
U1
1
CA8
BA25
C67
C96
R92
D6
J3
R94
U7
BA3
C101
C181
BA1
210
200
BA37BA38
230
220
BA39
C60
255
R24
U3
R91
C196
Q7Q3
R93
Q8
C197
C95
C184
BA5
BA4BA6
C190
C177
C42
ZD3
R37
R27R31
R26
R36
L1
U17
J1
C89
C48
C59
C127
U14
U10
R30
U9
L7
Q6
R52
R59
R32
R60
U24
U16
U12
C61
C31
R50
R49
R83
C56
C55
C32
X2
R84
Q2
R68
C36
Q5
R58
C37
L26
C57
C38
C40
Q4
C58
L9
U15
R80C30
R47
Q1
R48
L12
L13
C192
C135
J4
1
C41 L27
L23
C188
ZD6
U4
L4
J10
1. MAIN BOARD (Component Side)
Page 21
C186C51
C118
C204
R1
C24
C27
R14
C25
C230
C229
C53
C129
C128
C126
C21
C5
L2
C142
C143
L8
C103
C26
C166
C167
C168
C54
C52
C124C123
C133
C131
C130
C125
C136
C140
C137
C146
C145
C155
C156
C149
C154
C160
C169
C170
C173
C172
C171
C83
C94
C93
C92
R23
C110
C134
C122
C144
C139
C138
C147
C141
C23
C158
C157
C148
C163 C161
C164
C162
C165
C17
C85
R74
C88
C90
C91
C117C120
C114C116
C121
C16
C19
C14
C22
C20
C159
C18
C81
C79
R73C87
C86
C84
R18
R19
C11
C70
C77
C76
C78
C80
C82
R90
C111
C115
C112
C98
C97
C102
R8
R7
L10
C9
R17
R10
R11
C12
C68
C75
C69
C71
C203
R97
R96
C109
C108
C105
C104
C107
C106
C8
R4
C4
R9
C6
R6
C7
C10
R2
R67
R21
R78
C202
R110
C182
C180
C100
R3
R5
R130
R132
R56
R55
R53
R38
R135
R133
R45
R46
R61
C33
R109
R108
R89
R99
C224
R111
C39
R88
C113C183
R70
C119
C176
R54
R25
R77
R125
R42
R41
R43
R44
R126
R121
R28
C132
C231
C178
C179
C200
R86
R85
R82
R35
R87
R39
R40
C191
R29
R33
R34
R57
R51
R95
C2
C232
R22
C199
R81
R79
R75
R69
R72
C189
C187
C185
R124
C46
C45
C44
C43
C34
C29
C28
L17L16
R71
2. MAIN BOARD (Solder Side)
Page 22
EXPLODED VIEW
1
23
4
5
A
8
9
10
10-1
13
12
7
6
EXPLODED VIEW PARTS LIST
Ref. No.
1
2
3
4
5
6
7
8
9
10
10-1
11
12
13
A
Part No.
3091TKL021C
6304TLT157A
6632Z-1502D
6871TST198A
4951TKS062A
6871TMT213A
6631T11010E
4951TKK044A
3809TKL016C
5410TKK020B
332-113F
3043TKK070B
332-105F
6634TBZ009E
3313TL5022A
Description
CABINET ASS’Y, LB680A G/WAY 3090TKL019A PC+ABS, 12446B
LCD , LGPHILIPS TFT LCD LM157E2-A2, 15.7” 1280x1024 W/O I
INVERTER, NMC1502 15.1”
PWB(PCB)ASS’Y, SUB LB680A XAGT BRAND CONTROL
METAL ASS’Y, FRAME LB680A
PWB(PCB)ASS’Y, MAIN LB680A XGWC G/WAY CL-18 TOTAL
CONNECTOR ASS’Y, 30P H-H 140MM UL-20276 LB680A
METAL ASS’Y, REAR LB680A
BACK COVER ASS’Y, LB680A 017A G-WAY, 12446B
INSULATION, PVC SHEET LB680
SCREW, PVP+3x12(MSWR/FZMY)
TILT SWIVEL ASS’Y, LG680, (G/WAY, 12446B)
SCREW, PVS+4x10(MSWR/FZMW)
ADAPTER, AC-DC, PSCV360107 SAMSUNG 100-240V 24V 1.5A FOR G/WAY
MAIN TOTAL ASS’Y, LB680A G/WAY CL-18
Page 23
REPLACEMENT PARTS LIST
CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS,
READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL.