Transfer Belt Edge Not Detected - Xerox DocuColor 2240 Service Manual

4-348 Transfer Belt Edge Not Detected

The IBT Edge Sensor cannot sense the Transfer Belt edge.
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, 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
J533-A11(+) on the I/F PWB and GND(-). Between +3 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
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
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
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
+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
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
13.1). If the problem continues, replace the I/F PWB
1.3).
Check the IBT Belt installation (REP 9.22). If no problems are found, replace the MCU PWB
(PL 13.1).
Initial issue
DC 3535/2240/1632
(PL 13.1).
(PL 13.1).
[004-001] and press Start. The Steering
(PL 9.1), and IBT Steering Motor
P/
Figure 1 4-348 RAP Circuit Diagram - IBT Edge Sensor
(PL
(PL 5.4).
Figure 2 4-348 RAP Circuit Diagram - IBT Steering Motor
Motor
(PL
(PL
02/03
2-61
Status Indicator RAPs
4-348