Sanyo LMU-TK12A Service Manual page 6

No. SYMPTOM
5 White/Grey on whole
screen
(Nothing on screen)
6 Screen's display range
is incorrect
7 Screen is distorted
8 Part of colors(R/G/B) is
not displayed
Black line is appeared
vertically
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
CHECK POINTS
1 Is the wire harness between main PCB
and LCD module secured firmly ?
2 Is the LCD module defective ?
3 Is the main PCB defective ?
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 ?
1 Is the adjustment for screen performed
correctly ?
2 Is a signal cable connected securely ? Check the connection of a signal cable
3 Is a signal cable extended ?
4 Is the output level on image from a
computer not agreeable to LCD's
specification ?
5 The Image Processing circuit on main
PCB may be defective
1 Is a signal cable connected securely ? Check the connection of a signal cable
2 Is the connection between main PCB
and a LCD module securely ?
3 The Image Processing circuit on main
PCB may be defective
TREATMENTS
Check the connection of wire harness
Replace a LCD module with the new
one
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
Don't extend a signal cable
Check the specification of a computer
Replace the main PCB with the new one
Check the connector
Replace the main PCB with the new one