Xerox DocuColor 2240, Service Manual

Page: 97 / 1489

09/03
2-64 DC 3535/2240/1632, WC M24
4-347
Initial issue Status Indicator RAPs
4-347 Transfer Belt Out of Position
The IBT Edge Sensor does not sense the Transfer Belt edge in the correct position.
Initial Actions
Check the following:
• Check that the IBT Belt Cleaner is not damaged, binding, or incorrectly assembled.
• Ensure that the Transfer Belt is clean and free from damage, especially the inboard edge.
• Check if the actuator for IBT Edge Sensor touches the belt edge; check actuator installa-
tion.
Procedure
Switch the power on. Enter dC330 [004-014] and press Start . Measure voltage between P/
J533 -A11(+) on the I/F PWB and GND(-). B3 VDC and +1 VDC is measured.
Y N
There is +5 VDC between
P/J533 -A9(+) and P/J533 -A10(-) on the I/F PWB.
Y N
Close the Front Cover. If the voltage between P/J533 -A9(+) P/J533 -A10(-) is less
than +5VDC, replace the MCU PWB ( PL 13.1 ).
There is +5 VDC between P/J533 -A11(+) on the I/F PWB and GND(-).
Y N
0 VDC is measured between
P/J533 -A11(+) on the I/F PWB and GND(-).
Y N
Refer to Figure 1 . Check the wires from J533 on the I/F PWB to J119 on the IBT
Edge Sensor for damage or loose connections. If the wires are OK, replace the
IBT Edge Sensor (
PL 5.4 )
If the problem continues, replace the MCU PWB ( PL 13.1 ).
Refer to Figure 1 . Check the wires from J533 on the I/F PWB to J119 on the IBT
Edge Sensor for a short circuit. If the wires are OK, replace the IBT Edge Sensor ( PL
5.4 ).
Refer to Figure 1 . Check the wires from J533 on the I/F PWB to J119 on the IBT Edge
Sensor for an open circuit. If the wires are OK, replace the IBT Edge Sensor ( PL 5.4 ).
+24 VDC is measured between P/J550 -5(+) on the I/F PWB and GND(-).
Y N
Go to the +24 VDC Wirenets and check +24VDC circuit up to P/J550 -5 on the I/F PWB.
Remove the IBT Assembly. Enter dC330 [004-001] and press Start . The Steering Motor
energized.
Y
N
Refer to Figure 2 . Check the wires from P550 on the I/F PWB to J207 on the IBT Steering
Motor for damage or a loose connection. If the wires are OK, Replace the MCU PWB ( PL
13.1 ). If the problem continues, replace the I/F PWB ( PL 9.1 ), and IBT Steering Motor ( PL
1.3 ).
Check the IBT Belt installation ( REP 9.22 ). If no problems are found, replace the MCU PWB
( PL 13.1 ).
Figure 1 4-347 RAP Circuit Diagram - IBT Edge Sensor
Figure 2 4-347 RAP Circuit Diagram - IBT Steering Motor