Sanyo lmu tk15a3 schematic

SERVICE MANUAL

INDUSTRIAL LCD MONITOR

LMU-TK15A3 (GENERAL)

(GENERAL)

LMU-TK15A3TC

(With Touch Screen)

(GENERAL)

LMU-TK15A3TS

(With Touch Screen)

PRODUCT CODE NO. LMU-TK15A3 1 938 102 77

LMU-TK15A3TC 1 938 102 78 LMU-TK15A3TS 1 938 102 83

REFERENCE No. SM920018

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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 --------------------------------------------------------------------------

6, TABLE OF SIGNAL NAME ------------------------------------------------------------------ 14,15

7, EXPLODED VIEW AND PARTS LIST

7-1 Exploded View

7-1-1 LUM-TK15A3 ------------------------------------------------------------------------7-1-2 LUM-TK15A3TC ---------------------------------------------------------------------

7-1-3 LUM-TK15A3TS ---------------------------------------------------------------------

17 18

7-2 Parts List

7-2-1 LUM-TK15A3 ------------------------------------------------------------------------7-2-2 LUM-TK15A3TC ---------------------------------------------------------------------

7-2-3 LUM-TK15A3TS ---------------------------------------------------------------------

20 21

8, APPENDIX -------------------------------------------------------------------------------------- 22

Refer to the separate volume User’s Manual and CD-ROM that included for instruction.

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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 (5

C 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.

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1. MAIN SPECIFICATION

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)

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/m

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)

Note : To improve this LCD monitor’s performance level, its specifications and

appearance are subject to change without notice.

LCD

Video

Physical

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

LMU-TK15A3

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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)

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/m

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)

Note : To improve this LCD monitor’s performance level, its specifications and

appearance are subject to change without notice.

LCD

Video

Physical

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

LMU-TK15A3TC/LMU-TK15A3TS

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Check the following for troubles of LCD monitor.

2. TROUBLESHOOTING

Symptom

No. Check Points Treatments Class

No Picture with Back light OFF

1 Is the Power "ON" to 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

4 Is a computer standing by ?

Disconnected a signal cable ? or Bent a

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

LCD module secured firmly ? Is the wire harness between LCD module and

DC/DC Comnv. secured firmly ? Is the wire harness between DC IN PCB and

DC/DC Conv. PCB secured firmly ? Is the wire harness between main PCB and DC

IN PCB secured firmly ?

11 Is the LCD module defective ? Replace a LCD module with the new one C

Check AC outlet, AC cord, DC Jack and Power switch for a LCD monitor

Be out of standing by condition, by operating to a computer

Ensure the connection of a signal cable B

Check the connection of wire harness C

12 Is the Inverter block on LCD module defective ? Replace a LCD module with the new one C

13 Is the DC/DC Conv. PCB defective ?

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

defective ?

No Picture with Back light ON

1 Is a screen saver programming running ?

Is the computer’s signal timing not agreeable to

the LCD’s specification ? Is the Image Processing circuit on main PCB

defective ?

White/Grey on whole screen(Nothing on screen)

Is the wire harness between main PCB and

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

PCB defective ?

Replace a DC/DC Conv. PCB with the new one

Replace the main PCB with the new one C

Press any key or touch the mouse, to end the screen saver program

Adjust the computer’s signal timing, if possible

Replace the main PCB with the new one C

Ensure the connection of wire harness C

Replace the main PCB with the new one C

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

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No. Check Points Treatments Class

Is the wire harness between inverter and a LCD module secured firmly ?

Ensure the connection of a wire harness C

Is the wire harness between one of inverters and main PCB secured firmly ?

Ensure the connection of a wire harness C

3 Is the display circuit on main PCB defective ? Replace the main PCB with the new one C

Is the adjustment for screen performed correctly ?

Adjust the screen correctly A

Is the output level on image from a computer not agreeable to LCD’s specification ?

Check the specification of a computer B

3 Is the size of screen set correctly ?

Set the size of screen again(refer to User’s Manual for computer)

Is the adjustment for screen performed correctly ?

Adjust the screen correctly A

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 not agreeable to LCD’s specification ?

Check the specification of a computer B

Is the Image Processing circuit on main PCB defective ?

Replace the main PCB with the new one C

1 Is a signal cable connected securely ? Check the connection of a signal cable A

Is the connection between main PCB and a LCD module securely ?

Ensure the connector of wire harness C

Is the Image Processing circuit on main PCB defective ?

Replace the main PCB with the new one C

Screen’s display range is incorrect

Screen is distorted

Part of colors (R/G/B) is not displayed. Black line appears in vertically

Dark screen

Symptom

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

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