Ricoh IWB-D1 Service Training page 54

Troubleshooting - 7
Symptom
Operation buttons on the
display unit do not work.
Slide 54
Cause
Defective Check the
operation buttons harness
or LCD control condition
board between
Operation board
and LCD control
board.
Replace the
operation
buttons.
If the above does
not resolve the
problem, replace
the LCD control
board.
54
Model K-C3.5L
Solution