WILLETT 430 - Display; Keypad Faults

430 Ink Jet Printer Service and Maintenance Manual
150
Issue 2
Part No. 306-0430-102
Display
Possible Cause Remedial Action
LCD contrast not set correctly.
Press
ctrl
+
L
. When the LCD is readable, press
any key to set contrast.
Ribbon cable between CPU board and LCD is faulty. Check cable for continuity. Replace if faulty.
I/O board or CPU board faulty. Change I/O board (see
I/O Board
, page 110) or CPU
board (see
CPU Board
, page 112).
LCD faulty. Change LCD assembly (see
LCD and Backlight
,
page 115).
Table 41 Display Failure
Keypad Faults
Possible Cause Remedial Action
Ribbon cable between CPU board and keypad is
disconnected or faulty
1
Check that cable is connected.
2
Check cable for continuity, replace if faulty.
CPU board faulty Exchange CPU board (see
CPU Board
, page 112).
Keypad faulty Exchange keypad (see
Keypad
, page 116).
Table 42 Keypad Failure