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SERVICE MANUAL
INDUSTRIAL MONITOR

LMU-TK15C4 (GENERAL)

PRODUCT CODE No. LMU-TK15C4 1 938 102 49

REFERENCE NO. SM 920011

INDEX PRECAUTIONS 1, MAIN SPECIFICATION 2, TROUBLE SHOOTING 3, MAINTENANCE Disassembling the major components 4, BLOCK DIAGRAM 5, CONNECTION DIAGRAM 6, TABLE OF SIGNAL NAME 7, EXPLODED VIEW AND PARTS LIST 7-1 Exploded View 7-2 Parts List 8, APPENDEX 11 12 13 6 7 8 9,10 Page 2 3 4,5

Refer to the separate volume user's guide for instruction.

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PRECAUTIONS
Placement precautions
l l l 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. l 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
l l l l l 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 40 oC, or 41oF to 104 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.

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1. MAIN SPECIFICATION
Display Panel Type Screen Size Pixel Pitch Pixel Format Brightness Response Time Contrast Viewing Angle (minimum) Back Light Colors RGB Input RGB Type Signal Format Signal Sync. Type/Level Synchronization Signal Format Horizontal Freg. Vertical Freg. Power Management Plug & Play VIDEO Input
Composite Video Signal Format

TFT 15.0" 0.297 x 0.297 mm 1,024 x 768 250cd/m2 typ. 40ms 350 : 1 typ. Left & Right :70 deg Up : 55 deg Down : 65 deg (CR=5) CCFL x 2 16.77 million

Analog RGB 0.7Vp-p 75 ohm Separate / TTL 24.8k 60.2kHz 56 75Hz VESA DPMS VESA DDC1, DDC2B

S-Video Signal Format Physical VGA VIDEO Input S-VIDEO Power Supply OSD Operating Temperature Environment Humidity Model Name Power Supply Input (AC Adapter) Output Power Supply Consumption Dimensions Weight Accessories

75 ohm 1Vp-p (PAL, NTSC) Luminance : 75 ohm 1Vp-p Chrominance : 75 ohm 0.286Vp-p (PAL, NTSC)

Mini D-Sub 15pin RCA Mini Din 4pin DC IN Jack 4pin UB Connector Operating : 5 deg to 40 deg Storage : -20 deg to 60 deg 30% - 85% RH (No Condensation) GI40-US1225 AC115-240V 1.0A-0.55A, 50-60Hz DC 12V 2.5A 28W max. 5W in Energy Saving mode 385(W) x 308(D) x 46(H) mm 3.8kg AC Adapter, Power Cord, VGA Cable, OSD Control Box, User's Guide

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2. TROUBLESHOOTING
Check the following for troubles of LCD monitor.
Sympton Check Points Treatments Class

No Computer's Picture

1 Is the Power "ON" to a LCD Monitor and a Computer? 2 Is a computer standing by ? 3 Is a VGA cable connected securely ? 4 Disconnected a VGA cable ? or Bent a terminal pin ? 5 Is an AC Adapter defective? Is the wire harness between main PCB and DC IN PCB secured firmly 6 ? Is the wire harness between Inverter PCB and a LCD module secured 7 firmly ? Is the wire harness between main PCB and Inverter PCB secured 8 firmly ? Is the wire harness between main PCB and SW/LED PCB or main 9 PCB and Brightness control volume connected securely ? 10 Is the Power Supply circuit on main PCB defective ? 11 Is the Image Processing circuit on main PCB defective ? 12 Is the Brightness control volume defective ? 13 Is the LCD module defective ? 14 Is the Inverter unit defective ? 15 Is the display circuit on main PCB defective ?
White/Grey on whole screen(Nothing on screen)

Check Power supply and Power switch for a LCD monitor and Computer. Be out of standing by condition, by operating to a computer Ensure the connection of a VGA cable Replace a VGA cable with the new one Replace an AC Adapter with the new one Check the connection of wire harness Check the connection of wire harness Check the connection of wire harness Check the connection of a wire harness Replace the main PCB with the new one Replace the main PCB with the new one Replace the Volume PCB with new one, and check the screen Replace a LCD module with the new one Replace an Inverter unit with the new one Replace the main PCB with the new one Check the connection of wire harness Replace a LCD module with the new one Replace the main PCB with the new one

A A A B C C C C C C C C C C C C C C C C C A A B A

Is the wire harness between main PCB and LCD module secured firmly ? 2 Is the LCD module defective ? 1 3 Is the main PCB defective ?
Dark screen

Is the wire harness between inverter and a LCD module secured Check the connection of a wire harness firmly ? Is the wire harness between one of inverters and main PCB secured 2 Check the connection of a wire harness firmly ? 3 Is the display circuit on main PCB defective ? Replace the main PCB with the new one 1
Screen's display range is incorrect

1 Is the adjustment for screen performed correctly ? Adjust the screen correctly Is the computer's signal timing not agreeable to the LCD's 2 Check the computer's signal timing specification ? Is the output level on image from a computer not agreeable to LCD's 3 Check the specification of a computer specification ? Set the size of screen again(refer to User's 4 Is the size of screen set correctly ? Manual for computer)
A It is possible to treated by end-user B It might be possible to treate by end-user in some case. C It must be treated by Professional Technical Staff

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Sympton

Check Points

Treatments

Class

Screen is distorted

1 Is the adjustment for screen performed correctly ? 2 Is a VGA cable connected securely ?

Adjust the screen correctly Ensure the connection of a VGA cable

A A A B C A C C

3 Is a sigal cable extended ? Don't extend a VGA cable Is the output level on image from a computer not agreeable to LCD's 4 Check the specification of a computer specification ? 5 Is the Image Processing circuit on main PCB defective ? Replace the main PCB with the new one
Part of colors(R/G/B) is not displayed. Black line appears in vertically

1 Is a VGA cable connected securely ? 2 Is the connection between main PCB and a LCD module securely ? 3 Is the Image Processing circuit on main PCB defective ?

Check the connection of a VGAl cable Check the connection of a wire harness Replace the main PCB with the new one

Additon
Sympton Check Points Treatments Class

No Video Picture

1 Is the Power "ON" to a LCD Monitor and a Video Equipment? 2 Does a Video signal output from Video Equipment ? 3 Is a video cable connected securely ? 4 Is an AC Adapter defective? 6 Is the video decode circuit on Decoder PCB defective ? 7 Is the Image Processing circuit on main PCB defective ?

Check Power supply and Power switch for a LCD monitor and Video Equipment Ensure the Video signal Ensure the connection of video cable Replace an AC Adapter with the new one Replace theDecoder PCB with the new one Replace the main PCB with the new one

A A A C C C C C C C

5 Is the connection between main PCB and a decoder PCB securely ? Check the connection of a wire harness

Video input selecting portion is not displayed on OSD menu.(VIDEO or S-VIDEO is not able to select.)

1 Is the connection between main PCB and a decoder PCB securely ? Check the connection of a wire harness 2 Is the video decode circuit on Decoder PCB defective ? 3 Is the Image Processing circuit on main PCB defective ?
A It is possible to treated by end-user B It might be possible to treate by end-user in some case. C It must be treated by Professional Technical Staff

Replace theDecoder PCB with the new one Replace the main PCB with the new one

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3. MAINTENANCE
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) Inverter Unit 1.Unscrew to secure the Inverter Unit (4-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 (5-position) 3.Disconnect the cables on the Main PCB (7-position) / Two connectors from LCD module / One connector from the Switch PCB / One connector from the VR PCB / One connector from the DC-IN PCB / One connector from the Inverter PCB / One connector from the Video decoder 4.Unscrew to secure the bracket for RGB connector (2-position) (5) Connector PCB 1.Unscrew to secure the Connector PCB (2-position) 2.Disconnect the cable from Main PCB (6) VR PCB 1.Unscrew to secure the VR PCB (2-position) 2.Disconnect the cable from the Main PCB (7) 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 (8) Power PCB 1.Remove the power switch, while pressing the hock of the power switch (9) Video decoder PCB 1.Unscrew to secure the bottom lid(6-position) 2.Unscrew to secure the bracket for the Video decoder PCB (4-position) 3.Disconnect the cable from the Video decoder PCB

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EEPROM

OSD buttons
MICRO CONTROLLER

Main PCB (SANDDUNE HQMM)
ROM

4. BLOCK DIAGRAM

DB15 CHEETAH3 Video Contloller ASIC TFT XGA LCD PANEL

Vsync

Hsync

SAMPLING PLL

Red Green Blue

VIDEO PRE-AMP

8-bit, 135-MHz ADCs PLLS Enhanced IP scaling with line buffers Anti-smear, anti-color bleed Þlters Edge enhancement Þlter SmartSet processing SureSync processing Frame rate conversion OSD with memory Gamma correction look-up table Color enhancement/dithering PWMs TFT panel timing engine

-7Clock Gen. DEINTERLACER Interlace-to-Progressive Video Scan converter Memory Contloller Clock Gen. VIDEO DECODER ADC COMB Filter Clock Gen.

PANEL CONTROL

INVERTER

DDC

EEPROM for P&P

VRAM

Rotary Volume

Y/C

CVBS

DC/DC Conv.

POWER SUPPLY

Decoder PCB

VCC 20 VCC 19 VCC 18 VD0 17 VD1 16 VD2 15 GND 14 VD3 13 VD4 12 VD5 11 GND 10 VD6 9 VD7 8 GND 7 VCLK 6 MC_DATA 5 MC_SCLK 4 7114RESET# 3 N.C. 2 GND 1

VCC VCC VCC VD0 VD1 VD2 GND VD3 VD4 VD5 GND VD6 VD7 GND VCLK MC_DATA MC_SCLK 7114RESET# N.C. GND

20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

Connector P.C.B

1 2 3 4 5

1 2 3 4 5

MENU SEL DOWN UP GND N.C N.C N.C

1 2 3 4 5 6 7 8

TFT 15-inch Liquid Crystal Display

Analogue Interface P.C.B SANDDUNE HQMM

5. Connection Diagram

External OSD Switches box
Power Switch

Brightness Volume P.C.B

1 2 3 4 5

VR1 VRC VR2 N.C. N.C.

1 2 3

P10

+12V GND

1 2

CN201

1 2

-8Personal Computer
VGA Mini D-SUB 15pin
8 15 7 14 6 13 5 12 4 11 3 10 2 9 1 GND DDCLK GND VSYNC GND HSYNC GND DDDA N.C. N.C. BLUE GND GREEN N.C. RED

S-VIDEO P1

VIDEO
J2 CN502 VR1

GND DDCLK GND VSYNC GND HSYNC GND DDDA N.C. N.C. BLUE GND GREEN N.C. RED 8 15 7 14 6 13 5 12 4 11 3 10 2 9 1

P6

J1

J1

Video Decoder P.C.B
OSD BRIGHTNESS

P9

P2

CN501 CN6
2 1

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 42 43 44 45

GND DCLK GND DE GND VSYNC GND HSYNC GND NC GND BO7 BO6 BO5 BO4 GND BO3 BO2 BO1 BO0 GND GO7 GO6 GO5 GO4 GND GO3 GO2 GO1 GO0 GND RO7 RO6 RO5 RO4 GND RO3 RO2 RO1 RO0 VCC VCC TEST TEST TEST

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 42 43 44 45

P5 P7

CN202

DC IN P.C.B
P3

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

GND BE7 BE6 BE5 BE4 GND BE3 BE2 BE1 BE0 GND GE7 GE6 GE5 GE4 GND GE3 GE2 GE1 GE0 GND RE7 RE6 RE5 RE4 GND RE3 RE2 RE1 RE0

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 HOT1 COLD1

J201

DC IN

HOT1

COLD1

1 2 3 4 5 +12V GND VR1 VR2 ON(=5V) 1 2 3 4 5

N.C. 1 2 3

N.C. 1 2 3

AC Adapter AC Plug

CN1

CN2

CN3

Inverter Unit

SINV-75

6. TABLE OF SIGNAL NAME
Symbol RED GREEN BLUE DDDA(ID1) HSYNC VSYNC DDCK(ID3) BE7 BE6 BE5 BE4 BE3 BE2 BE1 BE0(EVEN) GE7 GE6 GE5 GE4 GE3 GE2 GE1 GE0(EVEN) RE7 RE6 RE5 RE4 RE3 RE2 RE1 RE0(EVEN) DCLK DENA VD HD BO7 BO6 BO5 BO4 BO3 BO2 BO1 BO0 GO7 Signal Name RED/Analog Video Signal GREEN/Analog Video Signal BLUE/Analog Video Signal DDC Data Horizontal Synchronizing Signal Vertical Synchronizing Signal DDC Data Clock BLUE Data[MSB]-Even BLUE Data BLUE Data BLUE Data BLUE Data BLUE Data BLUE Data BLUE Data[LSB]-Even GREEN Data[MSB]-Even GREEN Data GREEN Data GREEN Data GREEN Data GREEN Data GREEN Data GREEN Data[LSB]-Even RED Data[MSB]-Even RED Data RED Data RED Data RED Data RED Data RED Data RED Data[LSB]-Even Data Clock Data Enable Vertical Synchronizing Signal Horizontal Synchronizing Signal BLUE Data[MSB]-Odd BLUE Data BLUE Data BLUE Data BLUE Data BLUE Data BLUE Data BLUE Data[LSB]-Odd GREEN Data[MSB]-Odd Location P6-1 P6-2 P6-3 P6-12 P6-13 P6-14 P6-15 P10-2 P10-3 P10-4 P10-5 P10-7 P10-8 P10-9 P10-10 P10-12 P10-13 P10-14 P10-15 P10-17 P10-18 P10-19 P10-20 P10-22 P10-23 P10-24 P10-25 P10-27 P10-28 P10-29 P10-30 P9-2 P9-4 P9-6 P9-8 P9-12 P9-13 P9-14 P9-15 P9-17 P9-18 P9-19 P9-20 P9-22 Notes

POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY +

-9-

Symbol GO6 GO5 GO4 GO3 GO2 GO1 GO0 RO7 RO6 RO5 RO4 RO3 RO2 RO1 RO0 TEST TEST TEST +12V VR1,2 ON=5V VR1,2 VRC MENU SEL DOWN UP LED R LED G VD0 VD1 VD2 VD3 VD4 VD5 VD6 VD7 VCLK MC_DATA MC_SCLK 7114RESET#

Signal Name GREEN Data GREEN Data GREEN Data GREEN Data GREEN Data GREEN Data GREEN Data[LSB]-Odd RED Data[MSB]-Odd RED Data RED Data RED Data RED Data RED Data RED Data RED Data[LSB]-Odd Test Signal Out(*) Test Signal Out(*) Test Signal Out(*) for Output Voltage (+) for Cotrast Volume for Back-Light Control Brightness Control Brightness Control Menu Key Input Select Key Input Down Key Input Up Key Input LED/RED, Control Signal LED/GREEN, Control Signal Decoded Video Data Decoded Video Data Decoded Video Data Decoded Video Data Decoded Video Data Decoded Video Data Decoded Video Data Decoded Video Data Decoder Clock I2C Data I2C Clock Decoder Reset Signal

Location P9-23 P9-24 P9-25 P9-27 P9-28 P9-29 P9-30 P9-32 P9-33 P9-34 P9-35 P9-37 P9-38 P9-39 P9-40 P9-43 P9-44 P9-45 P3-1 P3-3,4 P3-5 P5-1,3 P5-2 P2-1 P2-2 P2-3 P2-4 P2-6 P2-8 J1-3 J1-4 J1-5 J1-8 J1-9 J1-10 J1-12 J1-13 J1-15 J1-16 J1-17 J1-18

Notes POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY + POLARITY +

H: Light ON

L:Reset

* : This terminal must be opened at System-side.

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7-2 Parts List

Parts marked as Are very important to secure safety. In case of replacement, it is required to use designted parts for safety. REF No. PART No. OUTER 661 004 4601 INDIVIDUAL 632 861 5414 632 889 7827 632 889 7834 661 000 9587 632 862 2696 632 298 2376 632 567 2588 632 603 0998 ACCESSORY 632 890 8363 632 890 8370 661 007 5131 CABINET1 661 007 7395 661 004 4618 CHASSIS 661 011 1181 661 007 7418 CHASSIS ELC. 661 001 5540 661 001 5588 661 001 5557 661 001 5595 661 001 5618 661 001 3164 632 835 1060 PC BOARD 661 011 1198 661 001 5649 661 001 5663 661 007 7432 661 007 7449 DESCRIPTION OUTER CARTON PAD, TOP ACCESSORY CASE PAD PAD CORNER POLYETHYLENE BAG, 400X550 POLYETHYLENE BAG, 120X320 POLYETHYLENE BAG, 200X300 POLYETHYLENE BAG, 130X500 INSTRUCTION MANUAL, ENGLISH INSTRUCTION MANUAL,GERMAN INSTRUCTION MANUAL, ENGLISH TOP LID ASS'Y RATING PLATE CHASSIS ASS'Y, BOTTOM SHIELD PLATE ASS'Y, COMP LIQUID CRYSTAL DIS. ASS'Y DC-AC INVERTER ASS'Y AC ADAPTER ASS'Y SEESAW SWITCH ASS'Y FFC ASS'Y CONTROLL BOX ASS'Y CABLE, VGA PW BOARD ASS'Y, MAIN PW BOARD ASS'Y, VR PW BOARD ASS'Y, DC-IN PW BOARD ASS'Y, CN PW BOARD ASS'Y, SUB Q'ty 1 1 1 1 8 1 1 1 1 NOTES

CAUTION

FOR MONITOR FOR CNT BOX FOR RGB CABLE FOR AC COAD

1 1 1 FOR SUB PCB 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

1 16 12 11 3 4 15 9 2 13 14 5 7 8 6 10

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APPENDIX Version of Firmware
The Version of Firmware is displayed on screen. Turn the Power Switch to Switch to `ON'. `OFF'. While pressing of the [ENTER] button, turn the Power

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