Sanyo LMU-TK18AG2 Service Manual page 6

No. Symptom
6 Dark screen
Is the wire harness between inverter and a LCD
1
module secured firmly ?
Is the wire harness between one of inverters
2
and main PCB secured firmly ?
3 Is the display circuit on main PCB defective ?
Screen's display range is incorrect
7
Is the adjustment for screen performed
1
correctly ?
Is the output level on image from a computer
2
not agreeable to LCD's specification ?
3 Is the size of screen set correctly ?
Screen is distorted
8
Is the adjustment for screen performed
1
correctly ?
2 Is a signal cable connected securely ?
3 Is a sigil cable extended ?
Is the output level on image from a computer
4
not agreeable to LCD's specification ?
Is the Image Processing circuit on main PCB
5
defective ?
Part of colors (R/G/B) is not displayed. Black line appears in vertically
9
1 Is a signal cable connected securely ?
Is the connection between main PCB and a
2
LCD module securely ?
Is the Image Processing circuit on main PCB
3
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
Check Points Treatments
Ensure the connection of a wire harness
Ensure the connection of a wire harness
Replace the main PCB with the new one
Adjust the screen correctly
Check the specification of a computer
Set the size of screen again(refer to User's
Manual for computer)
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
Check the connection of a signal cable
Ensure the connector of wire harness
Replace the main PCB with the new one
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Class
C
C
C
A
B
A
A
A
A
B
C
A
C
C