09/03
2-179
DC 3535/2240/1632, WC M24
9-343
Status Indicator RAPs
Initial issue
9-343 2nd BTR Retract
The 2nd BTR did not reach the retract position.
Initial Actions
• Clean the 2nd BTR Retract Sensor (PL 2.9) and check for damage.
• Check the 2nd BTR gears (PL 2.8) for breakage.
Procedure
Enter dC330 [009-200]. Open the Left Cover and block and unblock the 2nd BTR Retract Sen-
sor with a piece of paper. The display changes state.
YN
Disconnect P/J140. There is +5VDC from J140-3 to J140-1 (Figure 1).
YN
Check the wires from P/J533 on the I/F PWB to the sensor (Figure 1). If the wires
are OK, replace the I/F PWB (PL 9.1).
There is +3.3VDC from J140-2 to GND.
YN
Check the wire from P/J533-B19 on the I/F PWB to J140-2 for an open or a short
circuit to GND. If the wires are OK, replace the I/F PWB (PL 9.1). If the problem is
not solved, replace the MCU PWB (PL 13.1).
Replace the 2nd BTR Retract Sensor (PL 2.9).
In sequence, enter the following: dC330 [009-051] then dC330 [009-052]. The 2nd BTR con-
tacts and retracts.
YN
There is +24VDC from P/J533-B9 on the I/F PWB to GND (Figure 2).
YN
Go to the +24 VDC Wirenets (Figure 2) and troubleshoot the problem.
Check the wires between P/J533 and P/J216 (Figure 2) on the 2nd BTR Retract Motor
for opens, shorts, or loose connections. If the wires are OK, replace the 2nd BTR Retract
Motor (PL 2.9). If the problem continues, replace the MCU PWB (PL 13.1). If the problem
continues, replace the I/F PWB (PL 9.1).
Check for mechanical problems preventing the movement of the assembly. Check for debris
blocking the sensor.
Figure 1 9-343 Rap Circuit Diagram - 2ND BTR Retract Sensor
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