Brand: SANYO
Category: Commercial Solutions
Document Type: Parts/Service
Language: EN
Parts/Service for LMU-TK18AG2
Uploaded: Nov. 21, 2025, 6:22 p.m.
Warranty Information
Parts marked with ▲ are important for safety and require designated parts for replacement.
This manual provides instructions for the SANYO LMU-TK18AG2 and LMU-TK18AG2TC industrial monitors. It includes sections on precautions, main specifications, troubleshooting, maintenance, block diagrams, connection diagrams, signal names, and exploded views with parts lists.
Key operations covered:
- **Troubleshooting:** Identifies common issues like 'No Picture', 'Dark Screen', and 'Screen Distortion' with corresponding check points and treatments, categorized by repair accessibility (end-user, partial, or professional).
- **Maintenance:** Details the disassembly procedures for major components of both models, including the cabinet, LCD panel, main PCB, driver PCB, and other boards.
- **Exploded View and Parts List:** Provides visual breakdowns of the monitor components and a comprehensive list of parts with their reference numbers, descriptions, quantities, and notes.
Refer to the User's Manual and CD-ROM for detailed operating instructions.
Troubleshooting and error codes
| No. | Symptom | Check Points | Treatments | Class |
|---|---|---|---|---|
| 1 | No Picture with Back light OFF | 1. Is the Power "ON" to a LCD Monitor ? 2. Is the Power "ON" to a Computer? 3. Is a signal cable connected securely ? 4. Is a computer standing by ? 5. Disconnected a signal cable ? or Bent a terminal pin? 6. Is an AC Adapter defective? 7. Is the wire harness between main PCB and LCD module secured firmly ? 8. Is the wire harness between LCD module and DC/DC Comnv. secured firmly ? 9. Is the wire harness between DC IN PCB and DC/DC Conv. PCB secured firmly ? 10. Is the wire harness between main PCB and DC IN PCB secured firmly ? 11. Is the LCD module defective ? 12. Is the Inverter block on LCD module defective? 13. Is the DC/DC Conv. PCB defective ? 14. Is the display circuit on main PCB defective ? 15. Is the Power Supply circuit on main PCB defective ? |
Check AC outlet, AC cord, DC Jack and Power switch for a LCD monitor Check the Power for a Computer Check the connection of a signal cable Be out of standing by condition, by operating to a computer Ensure the connection of a signal cable 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 wire harness Replace a LCD module with the new one Replace a LCD module with the new one Replace a DC/DC Conv. PCB with the new one Replace the main PCB with the new one Replace the main PCB with the new one |
A A A A B C C C C C C C C C C |
| 2 | No Picture with Back light ON | 1. Is a screen saver programming running ? 2. Is the computer's signal timing not agreeable to the LCD's specification ? 3. Is the Image Processing circuit on main PCB defective? |
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 |
A B C |
| 3 | White/Grey on whole screen(Nothing on screen) | 1. Is the wire harness between main PCB and LCD module secured firmly ? 2. Is the LCD module defective ? 3. Is the Image Processing block circuit on main PCB defective ? |
Ensure the connection of wire harness Replace a LCD module with the new one Replace the main PCB with the new one |
C C C |
| 6 | Dark screen | 1. Is the wire harness between inverter and a LCD module secured firmly ? 2. Is the wire harness between one of inverters and main PCB secured firmly ? 3. Is the display circuit on main PCB defective ? |
Ensure the connection of a wire harness Ensure the connection of a wire harness Replace the main PCB with the new one |
C C C |
| 7 | Screen's display range is incorrect | 1. Is the adjustment for screen performed correctly? 2. Is the output level on image from a computer not agreeable to LCD's specification? 3. Is the size of screen set correctly? |
Adjust the screen correctly Check the specification of a computer Set the size of screen again(refer to User's Manual for computer) |
A B A |
| 8 | Screen is distorted | 1. Is the adjustment for screen performed correctly? 2. Is a signal cable connected securely ? 3. Is a sigil cable extended ? 4. Is the output level on image from a computer not agreeable to LCD's specification? 5. Is the Image Processing circuit on main PCB defective? |
Adjust the screen correctly Check the connection of a signal cable Don't extend a signal cable Check the specification of a computer Replace the main PCB with the new one |
A A A B C |
| 9 | Part of colors (R/G/B) is not displayed. Black line appears in vertically | 1. Is a signal 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 signal cable Ensure the connector of wire harness Replace the main PCB with the new one |
A C C |