Inoperative Keypad - Xerox DOCUPRINT N17 Service Manual

7.4.3 Inoperative Keypad

You were directed to this RAP because the Keypad failed to indicate a key press.
1 Enter Diagnostic Mode 1. The Control Panel displays PRINTER COUNTER OPERATION.
Y: Go to step 2.
N: Go to step 4.
2 Press the MENU DOWN (5) key to display SENSOR INPUT TEST. Then press the ENTER (4)
to select SENSOR INPUT TEST. The Control Panel displays SENSOR INPUT. INPUT COUNT =
XX.
Y: Go to step 3.
N: Go to step 4.
3 Press all keys, except the ITEM UP (2) key, and observe that the display indicates the actuation
of each key press. The counter increments by one when each key is pressed.
Y: Go to Final Actions.
N: Go to step 4.
4 Switch the printer OFF. Remove the System Controller Chassis and loosen/remove the top
cover. Verify P/J32 is properly connected to the Print Engine Controller and that P/J33 is
properly connected to the Control Panel Assembly and free of damage. Check for continuity
between P/J32 and P/J33. There is continuity.
Y: Go to step 5.
N: Replace the cable.
5 Switch the printer power ON. Check for +5VDC between P/J33-9 and P/J33-10.
Y: Replace the following parts in order:
• Control Panel Assembly
• System Controller
N: Go to step 6.
6 Check for +5VDC between P/J32-9 and P/J32-10.
Y: Replace the cable.
N: Go to step 7.
7 Check for +5VDC between P/J25-2 and P/J25-5.
Y: Replace the Print Engine Controller.
N: Go to step 8.
8 Check for +5VDC between P/J12-2 and P/J12-5.
Y: Replace the harness between P/J25 and P/J12.
N: Go to RAP 7.4.5 Low Voltage Power Supply (LVPS) Assembly Failure (+5VDC).
Repair Analysis Procedures (RAPs)
6/98
www.printcopy.info
7-44 Xerox DocuPrint N17 Service Manual