OKIDATA DOC-IT3000, Service Manual

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Page: 218
Service Guide DOC-IT3000/4000
Chapter 4 Failure & Repair Analysis
RAP#20 - 2nd Paper Tray Cannot be Selected
RAP 20: Second Paper Tray Error
START.
Second paper tray cannot be selected.
Check the + 5 vdc supply lines.
Is the + 5 vdc supply at pin (17) IC1 on the second tray control board present?
YES Check Reset-IN signal.
Go to A.
NO Check that the power connector board is making proper contact.
Disconnect, then reconnect, the second tray connection board.
Go to A.
A
Is the (Reset-In) signal Pin(19) IC1 on the second tray control board high?
YES Check that the second tray is properly connected.
NO Verify that all of the connectors on the engine control board are properly connected.
Has the problem been resolved?
YES End of procedure.
NO Check the control signals for the second paper tray.
NOTE:
The second paper tray is selected by serial output data and is controlled by a
serial clock.
Are the OPO-SDP-N and the OP-SCLK-N signals input correctly at Pins
(4,5) on IC1 of the second tray control board?
YES Replace the second tray control board.
NO Replace the engine control board.
Has the problem been resolved?
YES End of procedure.
NO Contact Technical Support.
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