General Errors; Errors Not Shown On The Display - Canon PC-D320 Service Manual

PC-D320/PC-D340/FAX-L400 Chapter 4: Maintenance and Service

4.3 Errors not Shown on the Display

4.3.1 General errors

• The unit does not power on. (Evaluation criteria: Look at the actual unit.)
(1) Check the power cord connection.
(2) Check the connection between the SCNT board (J514) and the ECNT board (J201).
(3) Replace the ECNT board.
(4) Replace the SCNT board.
• Abnormal display. (Applicable test mode: Operation panel test)
Nothing is displayed.
(1) Check the connection between the OPCNT board (J1) and the SCNT board (J503).
(2) Check the connection between the LCD unit and the OPCNT board (J5).
(3) Replace the LCD unit.
(4) Replace the OPCNT board.
(5) Replace the SCNT board.
Part of the LCD panel does not display anything.
(1) Check for LCD problems with the test mode.
(2) Check the connection between the OPCNT board (J1) and the SCNT board (J503).
(3) Check the connection between the LCD unit and the OPCNT board (J5).
(4) Replace the LCD unit.
(5) Replace the OPCNT board.
(6) Replace the SCNT board.
• The keys do not work. (Applicable test mode: Operation panel test)
(1) If the test mode can be used, check for faulty keys.
(2) Check the connection between the OPCNT board (J1) and the SCNT board (J503).
(3) Replace the OPCNT board.
(4) Replace the SCNT board.
4-26