Xerox DocuColor 12/DCCS50, Service Manual

Page: 251 / 1617

1/05
2-215 DocuColor 12/DCCS50
14-372 ROS Motor Fail RAP, 14-376 Half Tone PWB
Status Indicator RAPs
Reissue
14-372 ROS Motor Fail RAP
The SOS Sensor did not go Low within a specified time after the Polygon Motor energized.
Initial Actions
• Refer to BSD 6.5, BSD 6.6, and BSD 6.7 in the following procedure.
• Verify that the Drum Unit is firmly seated and that the screws that hold the unit in place
are installed.
• Verify that P/J420A on the lOT Drive PWB, and P/J399 AND P/J395 on the Half Tone
PWB are firmly connected.
Procedure
Open the Front Door and cheat the Interlock. Enter dC330 014-050 Polygon Motor Low Speed.
Press Start. When the Polygon Motor rotates you can feel vibrations by placing your hand on
the Drum Module Cover.
The Polygon Motor is rotating.
Y N
Press Stop. There is approximately 3.5 - 5.0 VDC between P/J420A -B16 on the IOT
Drive PWB and GND.
Y
N
Switch off the power. Go to Flag 1 on BSD 6.6 and check for an open circuit or a
short to GND. If the wires are OK, replace the ROS Assembly ( PL 4.1 ).
Enter dC330 014-050 Polygon Motor Low Speed. Press Start. +0.0 - +1.5 VDC is mea-
sured between P/J420A -B16 on the IOT Drive PWB and GND.
Y N
Go to Flag 1 on BSD 6.6 and check for an open circuit or a short to GND. If the wires
are OK, replace the IOT Drive PWB ( PL 9.2 ).
There is +24 VDC from P/J420A -B14 to P/J420-B15 on the IOT Drive PWB.
Y N
Go to the +24 VDC Wirenets ( Figure 5 ) and troubleshoot the 24 VDC circuits.
Go to Flag 5 on BSD 6.6. Check for an open circuit or a short to GND. If the wires are OK,
replace the ROS ( PL 4.1 ). If the problem continues, replace the IOT Drive PWB ( PL 9.2 ).
Switch on the power. +5 VDC is measured between P/J399 -1 and P/J399 -3 on the Half-
Tone PWB.
Y
N
+5 VDC is measured between
P/J395
-1 and P/J395 -3 on the Half-Tone PWB.
Y N
Go to the +5 VDC Wirenets ( Figure 1 ) and troubleshoot the 5 VDC circuits.
Replace the Half Tone PWB ( PL 9.2 )
Switch off the power. Go to Flag 1 and Flag 2 on BSD 6.5 and check for an open circuit. Go to
Flag 2 on BSD 6.6 and check for a short to ground. If the wires are OK, replace the following:
• lOT Drive PWB ( PL 9.2 ).
• ROS Assembly ( PL 4.1 ).
14-376 Half Tone PWB Fail RAP
The System wrote data in the Asic Register on the Half Tone PWB, but could not read the data.
Initial Actions
PO/PO the machine. If the Fault continues, perform the following.
•
Refer to BSD 6.5, BSD 6.6, and BSD 6.7 in the following procedure:
• Ensure that P/J398 on the Half Tone PWB is seated properly.
• Ensure that P/J345 and P/J341 on the LDD PWB are seated properly.
• Go to Flag 2 and Flag 3 on BSD 6.5 and check the wires for damage or an open or short
circuit.
• Check for other Chain 14 faults. Troubleshoot those faults first.
Procedure
Open the Front Door and cheat the Interlock. Enter dC330 014-050 Polygon Motor Low Speed.
Press Start. When the Polygon Motor rotates you can feel vibrations by placing your hand on
the Drum Module Cover.
The Polygon Motor is rotating.
Y N
Go to the 14-372 ROS Motor Fail RAP .
+5VDC is measured between P/J342 -1 and P/J342 -3 on the ROS Assembly.
Y N
Go to Flag 3 and Flag 4 on BSD 6.6. Check the wires for an open or short circuit. If the
wires are OK, replace the Half Tone PWB ( PL 9.2 ).
+5VDC is measured between P/J399 -2 and gnd.
Y N
Go to Flag 2 on BSD 6.6. Check the wires for an open or short circuit. If the wires are OK,
replace the Half Tone PWB ( PL 9.2 ).
Go to Flag 2 and Flag 3 on BSD 6.6. Check the wires for an open or short circuit. If the wires
are OK, replace the ROS Assembly ( PL 4.1 ). If the problem persists, replace the IOT CPU
PWB ( PL 9.2 ).