Sanyo LMU-TK12A User manual

SERVICE MANUAL
INDUSTRIAL MONITOR LMU-TK12A (Without Touch Panel) LMU-TK12AT (With Touch Panel)
(GENERAL)
REFERENCE NO. SM 920004
PRODUCT CODE NO.
LMU-TK12A 1 938 102 06
LMU-TK12AT 1 938 102 07

INDEX
Page
PRECAUTIONS ----------------------------------------------------------------------------------2
1, MAIN SPECIFICATION ---------------------------------------------------------------------3
2, TROUBLE SHOOTING ---------------------------------------------------------------------- 4,5
3, MAINTENANCE
Disassembling the major components ------------------------------------------------------6
4, BLOCK DIAGRAM ---------------------------------------------------------------------------- 7
5, CONNECTION DIAGRAM ------------------------------------------------------------------ 8
6, TABLE OF SIGNAL NAME ----------------------------------------------------------------- 9,10
7, EXPLODED VIEW AND PARTS LIST
7-1Exploded View ---------------------------------------------------------------------------11,12
7-2 Parts List ------------------------------------------------------------------------------------- 13,14
8, APPENDIX ------------------------------------------------------------------------------------- 15
Refer to the separate volume user’s guide for instruction.
-1-

PRECAUTIONS
Placement precautions
lAvoid placing the unit in humid or dusty places, or where it will be exposed to excessive heat
(direct sunlight, heaters, etc.)
lDo not step on or set anything on the AC cord.
DAMAGE TO THE AC CORD IS A SAFETY RISK AND CAN CAUSE A FIRE.
lDo 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.
lKeep 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
lAvoid bending, kinking or damaging the AC power cord.
lNever insert or remove the power cord with wet hands. Also, be sure to hold cord by the plug when
removing it from the outlet.
lDo not remove any parts that are held in place with screws. (The unit does not contain any user
serviceable items.)
lMaintain standard room temperature (5oC to 40oC, or 41oF to 104oF) during use. Do not subject the
unit to shock or vibration. Do not move the unit while it is in use.
lA 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
Model Name LMU-TK12AT LMU-TK12A
Display
Panel Type TFT
Screen Size 12.1"
Pixel Pitch 0.308 X 0.308 mm
Effective Viewing Area 246.0 X 184.5 mm
Pixel Format 800 X 600
Brightness 200cd/m2typ.
Response Time 50ms
Contrast 150 : 1 typ.
Viewing Angle (minimum) Left & Right :60 deg Up :30 deg Down :45 deg
Back Light CCFL x1
Panel Life Time 20,000 hours
Video Control System Analog RGB
Video 0.7Vp-p 75 ohm
Input Signal Sync.Type/Level Separate TTL (+/-)
Horizontal 24.8k - 53.7kHzSynchronization
Frequencies Vertical 56.4 - 85Hz
Colors 16.19million
Touch panel
Type Resistive -
Electrical Resolution 10bit (1,024 X 1,024) -
Communication Bi-directional asynchronous RS-
232C serial communication -
Baud rate 9,600 BPS (1,200 - 19,200 BPS) -
Data 7 bit (7bit or 8bit) -
Stop bit 2 bit (1bit or 2bit) -
Parity non (odd, even, or non) -
Touch Life Greater than 20 million touches
in any location. -
Touch Down Speed 15 ms -
Physical Video Signal 15pin mini D-Sub
Serial 9pin D-SubInput Power Supply DC Jack
operating : 5oCto 40oC
Operating
Temperature Storage : -20oCto 60oCEnvironment Humidity 30% to 80%RH
Model Name G140-US1225
Input 100-240V 1.0A-0.55A, 50-60Hz
Power Supply
(AC Adapter) Output 12V 2.5A
20W max. 15W max.
Power Supply Consumption 5W in Energy Saving mode
Dimensions 295(W) X 233(D) X 42(H) mm
Weight 2.0 kg 1.8 kg
Accessories
AC Adapter, Power Cord, RGB
cable, Serial cable, OSD control box,
Adjustment FD, Touch Ware
CD-ROM, User's Guide
AC Adapter, Power Cord, RGB
cable, OSD control box,
Adjustment FD, User's Guide
- 3 -

The "TROUBLESHOOTING for LCD Monitor" is described in below. Please refer to the manual "TROUBLE SHOOTING
for Touch-Screen" in CD-ROM.
No. SYMPTOM CHECK POINTS TREATMENTS
1Is the Power to a LCD monitor "ON"? Check AC outlet, AC cord, DC Jack and
Power switch for a LCD monitor
2Is an AC Adapter defective? Replace an AC Adapter with the new
one
3Is the wire harness between main PCB
and DC-IN PCB secured firmly ? Check the connection
1No Picture with Power
Indicator OFF
4The Power Supply circuit on main PCB
may be defective Replace the main PCB with the new one
1Is the Power to a computer "ON"? Check AC outlet, AC cord, DC Jack and
Power switch for a computer
2Is a computer standing by ? Be out of standing by condition, by
operating to a computer
2No Picture with Power
Indicator in Amber
3The Image Processing circuit on main
PCB may be defective Replace the main PCB with the new one
1Is a screen saver programming
running ? Press any key or touch the mouse, to end the screen saver program
2Is a signal cable connected securely ? Check the connection of a signal cable
3Disconnected a signal cable ? or Bent a
terminal pin ? Replace a signal cable with the new one
4Is the computer's signal timing not
agreeable to the LCD's specification ? Adjust the computer's signal timing, if possible
5Is the wire harness between Inverter
PCB and a LCD module secured
firmly ?
Check the connection of wire harness
6Is the wire harness between main PCB
and Inverter PCB secured firmly ? Check the connection of wire harness
7The Brightness control volume may be
defective Replace the Volume PCB with new one, and check the screen
8The LCD module may be defective Replace a LCD module with the new
one
9The Inverter unit may be defective Replace an Inverter unit with the new
one
3No Picture with Power
Indicator in Green
10 The display circuit on main PCB may
be defective ? Replace the main PCB with the new one
1Is a computer standing by ? Be out of standing by condition, by
operating to a computer
2Is a signal cable connected securely ? Check the connection of a signal cable
4No Picture with Power
Indicator blinking in
Green
3Disconnected a signal cable ? or Bent a
terminal pin ? Replace a signal cable with the new one
It is possible to treated by end-user
It must be treated by Professional Technical Staff
It might be possible to treat by end-user in some case.
2. TROUBLE SHOOTING
- 4 -

No. SYMPTOM CHECK POINTS TREATMENTS
1Is the wire harness between main PCB
and LCD module secured firmly ? Check the connection of wire harness
2Is the LCD module defective ? Replace a LCD module with the new
one
5White/Grey on whole
screen
(Nothing on screen)
3Is the main PCBdefective ? Replace the main PCB with the new one
1Is the adjustment for screen performed
correctly ? Adjust the screen correctly
2Is the output level on image from a
computer not agreeable to LCD's
specification ?
Check the specification of a computer
6Screen's display range
is incorrect
3Is the size of screen set correctly ? Set the size of screen again(refer to
User's Manual for computer)
1Is the adjustment for screen performed
correctly ? Adjust the screen correctly
2Is a signal cable connected securely ? Check the connection of a signal cable
3Is a signal cable extended ? Don't extend a signal cable
4Is the output level on image from a
computer not agreeable to LCD's
specification ?
Check the specification of a computer
7Screen is distorted
5The Image Processing circuit on main
PCB may be defective Replace the main PCB with the new one
1Is a signal cable connected securely ? Check the connection of a signal cable
2Is the connection between main PCB
and a LCD module securely ? Check the connector
8Part of colors(R/G/B) is
not displayed
Black line is appeared
vertically 3The Image Processing circuit on main
PCB may be defective Replace the main PCB with the new one
It is possible to treated by end-user
It must be treated by Professional Technical Staff
It might be possible to treat by end-user in some case
- 5 -

3MAINTENANCE
3-2 LMU-TK12AT
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 and Touch Panel
1. A Touch panel is on a LCD panel. The clearance between a Touch Panel and
a bottom case are filled with 8 rubber pieces. Pull the left-side of a Touch panel
upward carefully, then turn it over at the right side of a bottom case.
2. Unscrew to secure the LCD panel(4-position)
3. Pull the LCD panel up carefully. Disconnect a FPC from main PCB, and pull a
connector out to inverter unit.
4. Unscrew to secure the earth terminal(1-position)
5. Disconnect the cable on the main PCB(Orange, Grey)
6. Disconnect the cable on the Touch controller PCB
(3) Inverter Unit
1. Unscrew to secure the Inverter Unit(3-position)
2. Disconnect the cable from the main PCB
(4) Main PCB
1. Pull a RGB signal cable out
2. Unscrew to secure the main PCB(4-position)
3. Disconnect the cables on the main PCB(6-position)
/ Two cables have already been disconnected
/ One connector from Joint PCB
/ One connector from the LCD panel
/ One connector from the DC-IN PCB
/ One connector from the Inverter PCB
4. Unscrew to secure the bracket for RGB Connector(2-position)
(5) Touch Controller PCB
1. Unscrew to secure the Touch controller PCB(2-position)
2. Disconnect a serial cable
(6) Serial Cable(Connector and Cable with bracket)
1. Unscrew to secure the bracket for serial cable(2-poswition)
(7) Joint PCB
1. Unscrew to secure the Joint PCB(2-position)
2. Disconnect the cables from the main PCB and the LED PCB
(8) VR PCB
1. Unscrew to secure the VR PCB(2-position)
2. Disconnect the cable to the main PCB
(9) DC-IN PCB
1. Unscrew to secure the DC-IN PCB(2-position)
2. Disconnect one cable from Power Switch, and another cable from the main PCB
(10) Power Switch
1.Remove the Power Switch, while pressing the hook of the Power Switch
(11) LED PCB
1. Unscrew to secure the LED PCB(1-position)
2. One cable has already been disconnected.
- 6 -

4BLOCK DIAGRAM
V
H
R
G
B
RS232C
(for LMU-TK12AT only)
OSD Key
EEROM
Micro
Controller LED
ROM
Video
Controller
Cheetah 2
PLL
Video
Amp
SVGA
TFT
LCD
Panel
ADC
Clock Gen. Volume Inverter
Control Board Touch Screen
- 7 -

Analogue
Interface
P.C.B
Inverter
Unit
Volume
P.C.B
AC
Adapter
TFT 12-inch
Liquid Crystal
Display
Personal
Computer
Power Switch
AC
Plug
J201
DC IN
P.C.B
Controller
Touch Screen
External OSD
Switch
LED
P.C.B
Touch Screen
Connector
P.C.B
SANDDUNE 1
GND
VR1
ON (5V)
+12V
VR2
N.C.
MENU SEL
DOWN
UP GND
LED-R VCC LED-G
MENU SEL
DOWN
SCL RED
RED
GREEN
BLUE
SDA
BLUE
SDA
GREEN
SCL
CTS
GND RXD
RTS
TXD
TXD
RXD
CTS DTR
DSR
DCD
N.C. N.C. N.C.
N.C.
N.C. N.C. N.C.
RTS N.C.
N.C.
PO WER GND CHAS SIS GND
H.V N.C.
LGND
B5 B1 VS YNC
G0
DE
R3
B2
G4 HSYN C G1 TEST
DCLK B4
R2 R0
B3 B0
G5 VDD R1 R4 R5 G3 G2
VSYNC
HSYN C
VSYNC
HSYN C
+12V
GND
GND
GND
GND GND
GND
GND
GND GND
GND
NC
GND
UP
GND GND
VRC VR2 VR1
N.C.
N.C.
N.C.
N.C.
+12V
VDD
N.C.
N.C.
LL UL LR UR
BACK
N.C. N.C. N.C. N.C.
N.C. VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS
GREEN
GND
RED
CN1
1
2
3
4
5
P1
1
2
3
4
5
P2
1 2 3 4 5 6 7 8
5 9 4 8 3 7 2 6 1
CN7
1 2 3 4 5 6 7
CON3
1
2
3
CN503
1
2
3
CN501
1 2 3 4 5 6 7 8
CN401
1
2
3
5 9 4 8 3 7 2 6 1
JP2
1 2 3 4 5 6 7 8 9
10 11 12
P6
8
15
7
14
6
13
5
12
4
11
3
10
2 9 1
P7
1
2
CN201
1 2
P8
1
2
CN202
1
2
5
9
4
8
3
7
2
6
1
CN502
1 2 3 4 5
8
15
7
14
6
13
5
12
4
11
3
10
2 9 1
P5
1 2 3
CN6
1 2 3
P4
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
5. CONNECTION DIAGRAM
(Note)
(Note)
Notes: for LMU-TK12AT only
- 8 -

6. TABLE OF SIGNAL NAME
Symbol Signal Name Location Notes
DCLK Data Clock P4-2
HSYNC Horizontal Sync. P4-4 This signal is invalid, input H or L.
VSYNC Vertical Sync. P4-5 This signal is invalid, input H or L.
R0 Red Data (LSB) P4-9
R1 Red Data P4-10
R2 Red Data P4-11
R3 Red Data P4-13
R4 Red Data P4-14
R5 Red Data (MSB) P4-15
G0 Green Data (LSB) P4-19
G1 Green Data P4-20
G2 Green Data P4-21
G3 Green Data P4-23
G4 Green Data P4-24
G5 Green Data (MSB) P4-25
B0 Blue Data (LSB) P4-29
B1 Blue Data P4-30
B2 Blue Data P4-31
B3 Blue Data P4-33
B4 Blue Data P4-34
B5 Blue Data (MSB) P4-35
DE Data Enable (positive) P4-37
TEST Display test P4-38 For display test, to be L.
VDD Power Supply P4-39 3.3V
VDD Power Supply P4-40 3.3V
VIN Inverter Power P1-1 12V
VR1,2 Controlled Voltage P13,4
ON Back Light Control P1-5 H : Light ON
VR1,2 Brightness Volume P5-1,3
VRC Brightness Volume P5-2
MENU MENU Key P2-1
SEL SELECT Key P2-2
DOWN DOWN Key P2-3
UP UP Key P2-4
LED-R LED Red P2-6
LED-G LED Green P2-8
RED VIDEO Red Signal P6-1
GREEN VIDEO Green Signal P6-2
BLUE VIDEO Blue Signal P6-3
HSYNC Horizontal Sync. P6-13
VSYNC Vertical Sync. P6-14
SDA DDC Data P6-12
SCL DDC Clock P6-15
VR1,2 Controlled Voltage P1-3,4
ON Back Light Control P1-5 H : Light ON
- 9 -