HP C30 - Page 248

TAG 901: Misregistration/Skewed Prints (Duplex)
3-194 Troubleshooting Analysis Guide (TAGs) June 1999
3 Verify that J/P305, J/P310, J/P311, J/P312, J/P320, J/P321, and J/P322 are connected properly to
duplex control board #2.
• Verify that J/P306, J/P307, J/P308, J/P309, and J/P324 are connected properly to duplex control
board #1.
• Verify that J/P315 and J/P316 are connected properly to the “A” and “C” roller clutches.
• Run test prints in duplex.
Did the test indicate an error code?
No: Registration or skew problems can only result from mechanical causes. Return to the
beginning of this TAG.
Yes: Continue.
4 Did the side guides in the duplex tray move in and out while the test was running?
No: Go to #8 in this TAG.
Yes: Continue.
5 Check J/P312-1 on duplex control board #2 for +12 Vdc.
Is the voltage +12 Vdc?
No: Replace duplex control board #2, then turn to TAG 002: Check & Problem Resolution.
Yes: Continue.
6 Manually move the side guides in the duplex tray to the inside positions.
• Check J/P312-2 on duplex control board #2 for 0 Vdc.
Is the voltage 0 Vdc?
No: Continue.
Yes: Replace duplex control board #2, then turn to TAG 002: Check & Problem Resolution.
7 Turn the printer off and unplug the power cord.
• Disconnect J/P320 and J/P312.
• Check the following for continuity:
P312-1 to P320-1,
P312-2 to P320-2, and
P312-3 to P320-3.
Is there continuity?
No: Repair or replace the wiring or connectors from:
P312-1 to P320-1,
P312-2 to P320-2, or
P312-3 to P320-3;
then turn to TAG 002: Check & Problem Resolution.
Yes: Replace the side sensor. If this resolves the problem, turn to TAG 002: Check & Problem
Resolution. If this does not resolve the problem, replace duplex control board #2, then
turn to TAG 002: Check & Problem Resolution.