09/03
2-185
DC 3535/2240/1632, WC M24
9-350
Status Indicator RAPs
Initial issue
9-350 IBT Home Sensor
The IBT Home Sensor detected the IBT position strip before the IBT Belt made a complete rev-
olution.
Initial Actions
• Ensure that the Transfer Belt is installed correctly.
• Clean the IBT Home Sensor (PL 5.4) and check for damage
• Check the IBT drives for damage (PL 1.1).
Procedure
Remove the IBT Assembly. Enter dC330 [004-002]. The IBT Motor operates.
YN
There is +24VDC from P/J551-3 on the I/F PWB to GND (Figure 1).
YN
Go to the +24 VDC Wirenets (Figure 2) and troubleshoot the problem.
Check the wires between P/J551 and the IBT Motor (Figure 1) for opens, shorts, or loose
connections. If the wires are OK, replace the IBT Motor (PL 1.1). If the problem continues,
replace the MCU PWB (PL 13.1). If the problem continues, replace the I/F PWB (PL 9.1).
Enter dC330 [004-014]. There is +5VDC from P/J533-A9 to A12 on the I/F PWB
YN
Go to Figure 2 and check the wire from P/J533-A9 to P/J605 on the IBT Assembly for a
short circuit. If the wire is OK, replace the MCU PWB (PL 13.1). If the problem continues,
replace the I/F PWB (PL 9.1).
There is +3.3VDC from P/J533-A13 to A12 on the I/F PWB.
YN
Go to Figure 2 and check the wire from P/J533-A13 to P/J605 on the IBT Assembly for a
short circuit. If the wire is OK, replace the MCU PWB (PL 13.1). If the problem continues,
replace the I/F PWB (PL 9.1).
Go to Figure 2 and check the wires from P/J533 to the IBT Home Sensor for an open wire,
loose connection, or a short circuit. If the wires are OK, replace the IBT Home Sensor (PL 5.4).
If the problem continues, replace the MCU PWB (PL 13.1). If the problem continues, replace
the I/F PWB (PL 9.1).
Figure 1 9-350 Rap Circuit Diagram - IBT Motor
Figure 2 9-350 Rap Circuit Diagram - IBT Home Sensor
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