Xerox DocuColor 2240, Service Manual

Page: 134 / 1489

09/03
2-101
DC 3535/2240/1632, WC M24
6-277
Status Indicator RAPs Initial issue
6-277 IIT/DADF Communication
Communication cannot be established between the IIT/IPS and the DADF Control PWB.
Procedure
Switch on the power. CR4 on the DADF Control PWB illuminates.
Y N
+5VDC is measured between the DADF Control PWB
P/J550 -6 (+) and ground (-).
Y N
Check the +5VDC circuit to the DADF Control PWB P/J550 -6 by referring to Section
7 Wiring Data (DADF+5VDC)
Replace the DADF Control PWB ( PL 20.3 ).
Switch off the power. Check continuity of the following ( Figure 1 ):
Between IIT/IPS PWB P/J725 -20 and DADF Control PWB P/J551 -A1
Between IIT/IPS PWB P/J725 -19 and DADF Control PWB P/J551 -A2
Between IIT/IPS PWB P/J725 -18 and DADF Control PWB P/J551 -A3
Between IIT/IPS PWB P/J725 -17 and DADF Control PWB P/J551 -A4
The resistance is 4 Ohms or less for all wires.
Y
N
Check wires with more than 4 Ohms for an open circuit or poor contact (Refer to Flag 1
and Flag 2 ).
Replace the DADF Control PWB ( PL 20.3 ).
If the problem continues, replace the IIT/IPS PWB ( PL 18.3 ).
Figure 1 6-277 RAP Circuit Diagram - IIT DADF Communication