Ricoh IWB-D1 Field Service Manual page 136

5. Troubleshooting
Defects in the display manual operation buttons
Problem
The display operation buttons do
not operate.
Defects in the display
Problem
Although images can be
displayed on the screen, screen
projection has noise and
unevenness.
The screen has no display at all.
134
Cause
Defects in the LCD controller
or the display operation
buttons.
Cause
Defects in the LCD controller
or the LCD panel
Defect in any of the
following three units.
• LCD controller
• LCD power source
• LCD panel
Solution
• Display operation button
replacement.
• When it is not solved with the
above, replace the LCD
control board.
Solution
• Replace the LCD control
board.
• Replace the LCD panel when
it is not solved with the above.
Replace the parts one by one in
the following order.
• LCD controller
• LCD power source
• LCD panel