Xerox DocuColor 12/DCCS50, Service Manual

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2-119 DocuColor 12/DCCS50
9-363 Rotary Home Position Fail RAP
Status Indicator RAPs
Reissue
9-363 Rotary Home Position Fail RAP
Control Logic detected that the Rotary did not reach the Home position
Initial Actions
• Refer to BSD 9.2 and BSD 9.15 for the following procedure
• Ensure that P/J420A , P/J418A and P/J412A on the IOT Drive PWB, P/J260 , P/J261 ,
and P/J262 on the Rotary PWB, and P/J110 on the Rotary Home Position Sensor are
connected.
• Verify that the Xerographic CRU (Drum) unit is firmly seated and secured.
• Adjust the Rotary Home Position Sensor ( ADJ 6.1.1 ).
Procedure
The fault is declared after long runs of black-and-white prints or copies
Y
N
Enter dC330 009-220 Rotary Home Position Sensor. Press Start. Ensure that the Rotary
is in the home position The Display indicates (H).
Y N
+5 VDC is measured between
P/J418A
-7 and GND on the IOT Drive PWB.
Y N
Go to Flag 3 on BSD 9.2. Check the wire for a short circuit to ground. If the wire
is good, replace the Rotary Home Position Sensor ( PL 6.1 ).
Replace the IOT Drive PWB ( PL 9.2 ).
Enter DC920 . Select Yellow Position and press Start. The Rotary goes to the Yellow
Developer position
Y
N
Check the Fuses on the Rotary PWB. One or both of the fuses are open
Y N
+24 VDC is measured between
P/J14
-11 on the AC Driver PWB and P/J24-
4 on the IOT LVPS.
Y
N
+24 VDC is measured between
P/J24
-2 and P/J24 -4 on the IOT LVPS.
Y N
Go to the +24 VDC Power (IOT LVPS) RAP .
Go to the +24 VDC wirenet, and check the fuse F5 on the AC Drive PWB.
If the fuse is good, check the wire and circuit between
P/J14 -11 on the AC
Driver PWB and P/J24 -2 on the IOT LVPS for an open circuit.
Go to Flag 4 on BSD 9.2. Check the wires for an open or a short circuit. If the
wires are good, replace the Rotary PWB ( PL 6.1 ). If the problem continues,
Replace the Rotary Motor ( PL 6.1 ). If the problem continues, replace the IOT
Drive PWB ( PL 9.2 ).
Replace the Fuses. If the fuses become open again, replace the Rotary Motor ( PL
6.1 ).
Enter DC920 . Select Home Position and press Start. The Rotary returns to the Home
position.
Y
N
Check the Rotary Drive Components ( PL 6.1 ) and ( PL 6.6 ) for contamination and or
binding. If the problem continues, replace the Rotary Motor ( PL 6.1 ).
Press Start again. Visually inspect the Rotary Assembly. Ensure smooth operation of the
Rotary Motor.
The Rotary Assembly goes to the Y, M, C, K, positions and then to the
Home position without binding.
Y
N
Replace the Rotary PWB ( PL 6.1
).
Go to Flag 6 on BSD 9.2. Check for an open circuit. If the wires are OK, check the Rotary
Drive Components ( PL 6.1 ) and ( PL 6.5 ) for contamination and or binding. Check the
Rotary Home Position Sensor for contamination. If the problem continues, replace the
Rotary Home Position Sensor (
PL 6.1 ).
If erratic operation or intermittent faults continue, perform dC301 NVM Initialization
.
Remove the Black Development Housing. If binding is present, replace the Black Developer
(
REP 6.6.2 ).
Perform the following NVM modification to resolve the problem:
•
Enter dC131 from the machine UI.
• Change the value in location 776-066 to 300.
• Change the value in location 776-480 to 300.
• Exit UI diagnostics.
A
A
B
B