Iot Logic Failure - Xerox DocuColor 2240 Service Manual

4-341 IOT Logic Failure

MCU PWB cannot detect INTLK +5 VDC.
Initial Actions
• Check that the Waste Toner Bottle and all four Drum Cartridges are seated correctly.
• Check fault history for 9-925 faults. If this fault has occurred recently, go to the
• Check that the I/F PWB is securely connected to the MCU PWB at P410.
• Reinstall the IOT software. Refer to the instructions on the s/w install CD.
Procedure
There is +5VDC from P/J535-B13 on the I/F PWB to GND.
Y N
There is +5VDC from P/J631-1 to GND.
Y N
There is +5VDC from P/J631-3 to GND.
Y N
Go to Figure 1. Check the wire from
Go to Figure 1. Check the +5VDC INTLK wiring through the Drum connectors (
J151 - P/J154). If the wires are OK, check the CRUM connectors on the Drum Car-
tridges for damage, wear, or contamination. Clean, repair, or replace as required
(Machine Consumables) (PL 4.1).
Go to Figure 1. Check for an open circuit between P/J631-1 and P/J568-2 on the Inter-
lock Relay PWB (PL 9.1). If this wire is OK, check for an open circuit between P/J535-
B13 and P/J568-1. If this wire is OK, replace the Interlock Relay PWB
There is +5VDC from P/J401-B20 to GND.
Y N
There is +5VDC from P/J400-9 to GND.
Y N
Go to Figure 1. Check the wire from J568-5 to J400 -9 for an open circuit. If the wire
is OK, replace the Interlock Relay PWB
Go to Figure 1. Check the four wires from J401 to
short circuit. If the wires are OK, replace the MCU PWB
ues, replace the ROS (PL 3.1).
Go to Figure 1. Check the wires between the MCU PWB and the ROS for an open circuit or
loose connection:
• J401-A1 to J527-1
• J401-A2 to J526-1
• J401-B19 to J528-1
• J401-B20 to J529-1
If the wires are OK, replace the MCU PWB
ROS (PL 3.1).
Status Indicator RAPs
4-341
9-925
FS134 to P/J631-3 for an open circuit.
(PL 9.1).
(PL 9.1).
P/J526 - P/J529 on the ROS for a
(PL 13.1). If the problem contin-
(PL 13.1). If the problem continues, replace the
RAP.
P/
Figure 1 4-341 RAP Circuit Diagram
02/03
2-56
Initial issue
DC 3535/2240/1632