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SERVICE MANUAL
LMU-TK15A3 (GENERAL)
INDUSTRIAL LCD MONITOR LMU-TK15A3TC (With Touch Screen)
(GENERAL)
LMU-TK15A3TS (With Touch Screen)
(GENERAL)
PRODUCT CODE NO.
LMU-TK15A3 1 938 102 77
LMU-TK15A3TC 1 938 102 78
LMU-TK15A3TS 1 938 102 83
REFERENCE No. SM920018
INDEX
Page
PRECAUTIONS ---------------------------------------------------------------------------------- 2
1, MAIN SPECIFICATION --------------------------------------------------------------------- 3,4
2, TROUBLESHOOTING ----------------------------------------------------------------------- 5,6
3, MAINTENANCE
3-1 LUM-TK15A3 ------------------------------------------------------------------------------ 7
3-2 LUM-TK15A3TC -------------------------------------------------------------------------- 8
3-3 LUM-TK15A3TS -------------------------------------------------------------------------- 9
4, BLOCK DIAGRAM ---------------------------------------------------------------------------- 10
5, CONNECTION DIAGRAM
5-1 LUM-TK15A3 ------------------------------------------------------------------------------ 11
5-2 LUM-TK15A3TC -------------------------------------------------------------------------- 12
5-3 LUM-TK15A3TS -------------------------------------------------------------------------- 13
6, TABLE OF SIGNAL NAME ------------------------------------------------------------------ 14,15
7, EXPLODED VIEW AND PARTS LIST
7-1 Exploded View
7-1-1 LUM-TK15A3 ------------------------------------------------------------------------- 16
7-1-2 LUM-TK15A3TC --------------------------------------------------------------------- 17
7-1-3 LUM-TK15A3TS --------------------------------------------------------------------- 18
7-2 Parts List
7-2-1 LUM-TK15A3 ------------------------------------------------------------------------- 19
7-2-2 LUM-TK15A3TC --------------------------------------------------------------------- 20
7-2-3 LUM-TK15A3TS --------------------------------------------------------------------- 21
8, APPENDIX -------------------------------------------------------------------------------------- 22
Refer to the separate volume User's Manual and CD-ROM
that included for instruction.
_ 1 _
PRECAUTIONS
Placement precautions
Avoid placing the unit in humid or dusty places, or where it will be exposed to excessive heat
(direct sunlight, heaters, etc.)
Do not step on or set anything on the AC cord.
DAMAGE TO THE AC CORD IS A SAFETY RISK AND CAN CAUSE A FIRE.
Do not connect the unit to the same AC as outlet with appliances that generate large amounts of
interference (such as heaters with thermostats, appliances with motors, etc.). It is best to use a
completely separate electrical outlet.
Keep the unit away from water. If water accidentally enters the unit, unplug the AC power cord
immediately. DO NOT PLUG IN THE UNIT AGAIN.
Handling precautions
Avoid bending, kinking or damaging the AC power cord.
Never insert or remove the power cord with wet hands. Also, be sure to hold cord by the plug when
removing it from the outlet.
Do not remove any parts that are held in place with screws. (The unit does not contain any user
serviceable items.)
Maintain standard room temperature (5oC to 35 oC, or 41oF to 95 oF) during use. Do not subject the
unit to shock or vibration. Do not move the unit while it is in use.
A rapid increase in room temperature in cool weather can cause condensation to from inside the unit.
If this occurs, wait at least 15 minutes after turning the unit on before attempting to operate it.
_ 2 _
1. MAIN SPECIFICATION
LMU-TK15A3
LCD
Liquid Crystal Panel TFT
Display Size 15.0''
Pixel Configuration 1,024 x 768
Pixel Pitch 0.297 x 0.297 mm
Brightness 250 cd/m2
Response Time 40 ms
Contrast 350 : 1 typ.
Angle of Visibility Up 50, Down 55, Right 60, Left 60 degrees
(contrast ratio of less than 10)
Video
Vertical signal 56 - 75Hz
Horizontal signal 31.4 - 60.2kHz
Video Signal Analog RGB 75ohm 0.7Vp-p
No. of Colors 16.77 million
OSD Language English, German, French, Spanish
Plug & Play VESA DDC1, DDC2B
Power Management VESA DPMS
Physical
Dimensions 384 (W) x 308 (H) x 46 (D) mm
Weight 3.7kg
Operating Conditions Operating Temperature: 5°C to 40°C
Humidity: 30% to 85% RH (no condensation)
Power Supply/AC Adapter Model Name: GI40-US1225
Input: 115-240VAC 1.0A-0.55A, 50-60Hz
Output: DC 12V 2.5A
Power Consumption 28W (5W in Energy Saving mode)
Note : To improve this LCD monitor's performance level, its specifications and
appearance are subject to change without notice.
_ 3 _
LMU-TK15A3TC/LMU-TK15A3TS
LCD
Liquid Crystal Panel TFT
Display Size 15.0''
Pixel Configuration 1,024 x 768
Pixel Pitch 0.297 x 0.297 mm
Brightness 250 cd/m2
Response Time 40 ms
Contrast 350 : 1 typ.
Angle of Visibility Up 50, Down 55, Right 60, Left 60 degrees
(contrast ratio of less than 10)
Video
Vertical signal 56 - 75Hz
Horizontal signal 31.4 - 60.2kHz
Video Signal Analog RGB 75ohm 0.7Vp-p
No. of Colors 16.77 million
OSD Language English, German, French, Spanish
Plug & Play VESA DDC1, DDC2B
Power Management VESA DPMS
Touch Screen
Type Capacitive (LMU-TK15A3TC) Surface Wave (LMU-TK15A3TS)
Electrical Resolution 10bit (1,024 x 1,024) 0.86 x 0.86 mm
Communication Bi-directional asynchronous RS-232C serial communication
Physical
Dimensions 385 (W) x 309 (H) x 54 (D) mm
Weight 4.2kg
Operating Conditions Operating Temperature: 5°C to 40°C
Humidity: 30% to 85% RH (no condensation)
Power Supply/AC Adapter Model Name: GI40-US1225
Input: 115-240VAC 1.0A-0.55A, 50-60Hz
Output: DC 12V 2.5A
Power Consumption 30W (5W in Energy Saving mode)
Note : To improve this LCD monitor's performance level, its specifications and
appearance are subject to change without notice.
_ 4 _
2. TROUBLESHOOTING
Check the following for troubles of LCD monitor.
No. Symptom Check Points Treatments Class
1 No Picture with Back light OFF
Check AC outlet, AC cord, DC Jack and
1 Is the Power "ON" to a LCD Monitor ? A
Power switch for a LCD monitor
2 Is the Power "ON" to a Computer ? Check the Power for a Computer A
3 Is a signal cable connected securely ? Check the connection of a signal cable A
Be out of standing by condition, by operating
4 Is a computer standing by ? A
to a computer
Disconnected a signal cable ? or Bent a
5 Ensure the connection of a signal cable B
terminal pin ?
6 Is an AC Adapter defective? Replace an AC Adapter with the new one C
Is the wire harness between main PCB and
7 Check the connection of wire harness C
LCD module secured firmly ?
Is the wire harness between LCD module and
8 Check the connection of wire harness C
DC/DC Comnv. secured firmly ?
Is the wire harness between DC IN PCB and
9 Check the connection of wire harness C
DC/DC Conv. PCB secured firmly ?
Is the wire harness between main PCB and DC
10 Check the connection of wire harness C
IN PCB secured firmly ?
11 Is the LCD module defective ? Replace a LCD module with the new one C
12 Is the Inverter block on LCD module defective ? Replace a LCD module with the new one C
Replace a DC/DC Conv. PCB with the new
13 Is the DC/DC Conv. PCB defective ? C
one
14 Is the display circuit on main PCB defective ? Replace the main PCB with the new one C
Is the Power Supply circuit on main PCB
15 Replace the main PCB with the new one C
defective ?
2 No Picture with Back light ON
Press any key or touch the mouse, to end the
1 Is a screen saver programming running ? A
screen saver program
Is the computer's signal timing not agreeable to Adjust the computer's signal timing, if
2 B
the LCD's specification ? possible
Is the Image Processing circuit on main PCB
3 Replace the main PCB with the new one C
defective ?
3 White/Grey on whole screen(Nothing on screen)
Is the wire harness between main PCB and
1 Ensure the connection of wire harness C
LCD module secured firmly ?
2 Is the LCD module defective ? Replace a LCD module with the new one C
Is the Image Processing block circuit on main
3 Replace the main PCB with the new one C
PCB defective ?
A It is possible to treated by end-user
B It might be possible to treat by end-user in some case.
C It must be treated by Professional Technical Staff
_ 5 _
No. Symptom Check Points Treatments Class
4 Dark screen
Is the wire harness between inverter and a LCD
1 Ensure the connection of a wire harness C
module secured firmly ?
Is the wire harness between one of inverters
2 Ensure the connection of a wire harness C
and main PCB secured firmly ?
3 Is the display circuit on main PCB defective ? Replace the main PCB with the new one C
5 Screen's display range is incorrect
Is the adjustment for screen performed
1 Adjust the screen correctly A
correctly ?
Is the output level on image from a computer
2 Check the specification of a computer B
not agreeable to LCD's specification ?
Set the size of screen again(refer to User's
3 Is the size of screen set correctly ? A
Manual for computer)
6 Screen is distorted
Is the adjustment for screen performed
1 Adjust the screen correctly A
correctly ?
2 Is a signal cable connected securely ? Check the connection of a signal cable A
3 Is a sigil cable extended ? Don't extend a signal cable A
Is the output level on image from a computer
4 Check the specification of a computer B
not agreeable to LCD's specification ?
Is the Image Processing circuit on main PCB
5 Replace the main PCB with the new one C
defective ?
7 Part of colors (R/G/B) is not displayed. Black line appears in vertically
1 Is a signal cable connected securely ? Check the connection of a signal cable A
Is the connection between main PCB and a
2 Ensure the connector of wire harness C
LCD module securely ?
Is the Image Processing circuit on main PCB
3 Replace the main PCB with the new one C
defective ?
A It is possible to treated by end-user
B It might be possible to treat by end-user in some case.
C It must be treated by Professional Technical Staff
_ 6 _
3. MAINTENANCE
3-1 LMU-TK15A3
Disassembling the major components
(1) Cabinet
1. Unscrew to secure the cabinet (8-position)
2. Pull the cabinet upward to remove it
(2) LCD Panel
1. Unscrew to secure the LCD panel (4-position)
2. Pull the LCD panel up, and pull two connectors out from inverter unit
3. Disconnect two cables from the Main PCB
(3) Main PCB
1. Pull the RGB signal cable out
2. Unscrew to secure the Main PCB (5-position)
3. Disconnect the cables on the Main PCB (6-position)
/ Two connectors from the LCD module
/ One connector from the VR PCB
/ One connector from the DC-IN PCB
/ One connector from the Inverter PCB
/ One connector from the CN PCB
4. Unscrew to secure the bracket for RGB Connector (2-position)
(4) VR PCB
1. Unscrew to secure the VR PCB (2-position)
2. Disconnect the cable from the Main PCB
(5) DC-IN PCB
1. Unscrew to secure the DC-IN PCB (2-position)
2. Disconnect two cables, one is from power switch and another one is from the Main PCB
(6) CN PCB
1. Unscrew to secure the bracket for CN PCB (2-position)
2. Disconnect the cable from the Main PCB
(7) DC-AC Inverter
1. Unscrew to secure the DC-AC Inverter (4-position)
2. Disconnect the cable from the Main PCB
_ 7 _
3-2 LMU-TK15A3TC
Disassembling the major components
(1) Cabinet
1. Unscrew to secure the cabinet (8-position)
2. Pull the cabinet upward to remove it
(2) LCD Panel
1. Unscrew to secure the LCD panel (4-position)
2. Pull the LCD panel up, and pull two connectors out from inverter unit
3. Disconnect two cables from the Main PCB
(3) Main PCB
1. Pull the RGB signal cable out
2. Unscrew to secure the Main PCB (5-position)
3. Disconnect the cables on the Main PCB (6-position)
/ Two connectors from the LCD module
/ One connector from the VR PCB
/ One connector from the DC-IN PCB
/ One connector from the Inverter PCB
/ One connector from the CN PCB
4. Unscrew to secure the bracket for RGB Connector (2-position)
(4) VR PCB
1. Unscrew to secure the VR PCB (2-position)
2. Disconnect the cable from the Main PCB
(5) DC-IN PCB
1. Unscrew to secure the DC-IN PCB (2-position)
2. Disconnect two cables, one is from power switch and another one is from the Main PCB
(6) CN PCB
1. Unscrew to secure the bracket for CN PCB (2-position)
2. Disconnect the cable from the Main PCB
(7) DC-AC Inverter
1. Unscrew to secure the DC-AC Inverter (4-position)
3. Disconnect the cable from the Main PCB
(8) Touch Controller
1. Unscrew to secure the Touch Controller (2-position)
2. Disconnect two cables from Touch Controller
_ 8 _
3-3 LMU-TK15A3TS
Disassembling the major components
(1) Cabinet
1. Unscrew to secure the cabinet (8-position)
2. Pull the cabinet upward to remove it
(2) LCD Panel
1. Unscrew to secure the LCD panel (4-position)
2. Pull the LCD panel up, and pull two connectors out from inverter unit
3. Disconnect two cables from the Main PCB
(3) Main PCB
1. Pull the RGB signal cable out
2. Unscrew to secure the Main PCB (5-position)
3. Disconnect the cables on the Main PCB (6-position)
/ Two connectors from the LCD module
/ One connector from the VR PCB
/ One connector from the DC-IN PCB
/ One connector from the Inverter PCB
/ One connector from the CN PCB
4. Unscrew to secure the bracket for RGB Connector (2-position)
(4) VR PCB
1. Unscrew to secure the VR PCB (2-position)
2. Disconnect the cable from the Main PCB
(5) DC-IN PCB
1. Unscrew to secure the DC-IN PCB (2-position)
2. Disconnect two cables, one is from power switch and another one is from the Main PCB
(6) CN PCB
1. Unscrew to secure the bracket for CN PCB (2-position)
2. Disconnect the cable from the Main PCB
(7) DC-AC Inverter
1. Unscrew to secure the DC-AC Inverter (4-position)
2. Disconnect the cable from the Main PCB
(8) Touch Controller
1. Unscrew to secure the Touch Controller (4-position)
2. Disconnect three cables from Touch Controller
_ 9 _
4. BLOCK DIAGRAM
Main Board
DDC EEPROM
OSD Buttons
Micro
ROM
Controller
Video Controller ASIC
R G B Even Data 15inch
IRQ R G B B Odd Data
HCLK Host Panel XGA
HFS Interface Interface ODCK TFT
HDATA LCD_DE LCD
Panel
RED
Clock
BLUE ADC
Generator
GREEN Inverter
Hsync
Vsync Rotally
Volume
DC/DC Converter
Power Supply
RS232C Micro
ROM
Controller
TOUCH CONTROLLER AMP Touch Senser
A/D Conv.
Touch Senset Interface NVRAM
Micro Controller Interface
Touch Control Board (for LMU-TK15A3TC, LMU-TK15A3TS only)
_ 10 _
_ 11 _
Personal
Computer
GND 8 GND
DDCLK 15 1 DCLK 1
CN1
GND 7 2 GND 2
VGA
3 3
CN200
VSYNC 14 DE
GND 6 4 GND 4
5 5
HSYNC 13 N.C.
GND 5 6 GND 6
DDDA 12 7 N.C. 7
8 8
CN100
1
9
2
3
4
5
6
7
8
N.C. 4 GND
Mini D-SUB 15pin
10
11
12
13
14
15
N.C. 11 9 9
10 10
BLUE 3 GND
GND 10 11 BO7 11
GREEN 2 12 BO6 12
N.C. 9 13 BO5 13
N.C.
N.C.
N.C.
RED
GND
GND
GND
GND
GND
14 14
BLUE
DDDA
RED 1 BO4
DDCLK
VSYNC
HSYNC
GREEN
15 15
GND
16 BO3 16
17 BO2 17
18 BO1 18
19 BO0 19
20 20
GND
21 GO7 21
22 GO6 22
23 GO5 23
24 GO4 24
25 25
GND
MENU 26 GO3 26
1 1 SEL 1 27 GO2 27
2 2 DOWN 2 28 GO1 28
3 3 UP 3 29 GO0 29
4 4 4 30 30
CN502
GND GND
P.C.B
5 5 N.C 5 31 RO7 31
6 32 32
CN301
N.C RO6
N.C 7 33 RO5 33
Display
8 34 RO4 34
35 35
Connector
GND
36 36
CN501
RO3
37 RO2 37
38 RO1 38
39 RO0 39
40 VCC 40
41 VCC 41
42 42
43 43
MAIN P.C.B
44 44
45 45
P.C.B
VR1 GND
1 VRC 1 1 BE7 1
2 2 2 2
CN6
CN2
VR2 BE6
3 3 3 3
CN451
Switch
N.C BE5
4 4 4
CN201
BE4
5 N.C 5 GND 5
6 BE3 6
VR1
7 7
BE2
8 BE1 8
9 BE0 9
10 GND 10
External OSD
11 GE7 11
12 12
GE6
TFT 15.0-inch Liquid Crystal
13 13
Brightness Volume
GE5
14 GE4 14
15 GND 15
16 GE3 16
17 17
GE2
18 GE1 18
19 GE0 19
20 GND 20
+12V 21 RE7 21
1 GND 1 22 22
RE6
1 2 2 23 23
CN400
RE5
2 24 24
CN201
CN202
RE4
25 GND 25
26 RE3 26
27 RE2 27
28 RE1 28
29 RE0 29
J201
30 30
CN4
CN3
P.C.B
DC IN
3
2
1
3
2
1
5
4
3
2
1
CN450
V_LOW
V_LOW
V_HIGH
V_HIGH
VIN
N.C.
GND
CONT
PPWR
5
4
3
2
1
3
2
1
3
2
1
AC
Power Switch
CN1
CN3
CN2
Adapter
P.C.B
Inverter
AC
Plug
5-1 LUM-TK15A3
5. CONNECTION DIAGRAM
_ 12 _
N.C. 1 1
6 6 RTS LL LL
N.C. 2 2 RXD 1 12 UL UL
JP1
JP2
7 7 TXD 2 11
LR LR
3 3 3 10
UR
4 9 UR
8 8 GND BACK BACK
4 4 5 8 +12V
N.C. 6 7
9 9 GND
RTS
CTS
TXD
RXD
N.C. 5 5 7 6 GND
5
4 EVDD
NOVDATA
3 NOVCE
2 NOVCLK
For LMU-TK15A3TC only
1
+12V
CABLE NVRAM
Touch Screen
POWER GND
Controller
CHASSIS GND
N.C.
DTR
DSR
DCD
GND
1
6
2
7
3
8
4
9
5
2
1
D-SUB 9PIN
CN402
SERIAL PORT
Personal
Computer
GND 8 GND
DDCLK 15 1 DCLK 1
CN1