Rap 01 No Lcd Display - OKIDATA OF2600 Service Manual

RAP01 No LCD Display
START
Is the LCD lit?
NO Is the unit powered ON?
NO Power ON the unit. Verify that the memory board is properly installed.
YES Go to CHECK 1.
YES Press SELECT FUNCTION. Does the appropriate message appear on the LCD?
Okifax 2200: POLLING RX
Okifax 2400/2600: SELECT FUNCTION (OT)
YES
NO
CHECK 1
Is +5 vdc present at pins 7, 8, 14, 15 of CN4 on the printer control board?
NO Go to CHECK 2
YES Is +5 vdc present at pin 2 of CN1 on the operator panel board?
YES Replace the operation panel.
NO Go to CHECK 2.
CHECK 2
Make sure the main control board and the operator panel board, and their connecting cables are
properly installed. Then, replace the power supply board.
Has the problem been resolved?
YES
NO
Has the problem been resolved?
Service Guide OF2200/2400/2600
End of procedure.
Go to CHECK 1.
End of procedure.
Replace the main control board.
Chapter 2 Failure Analysis
Page: 48