Xerox DocuColor 2240 Service Manual page 370

16-380 DFE/ESS Communication Failure 10
NAK-generated sequence number error.
Initial Actions
Switch the power off, then on. If the problem continues, check the connections at the MCU
PWB and the I/F PWB. Check that the DDI cables from the Network Controller (NC) to the IOT
are secured and are free from damage.
Procedure
Switch off the power. Disconnect the DDI cables and the network cable from the NC to the IOT.
Switch on the power. The fault, or another DFE communications fault (16-361 through 16-
390) is still present.
Y N
Reload DFE software. If the problem persists, Switch the DDI cables from the NC to the
IOT (switch both ends). If the problem changes, replace the cables.
If the problem continues, verify that the NC is functioning correctly. Refer to the NC ser-
vice documentation.
• Reload IOT software.
• Replace the VSEL PWB (PL 13.1).
• Replace the ESS PWB (PL 13.1).
• Replace the MCU PWB (PL 13.1).
If the problem persists, replace the Network Controller.
Initial issue
DC 3535/2240/1632, WC M24
16-381 DFE/ESS Communication Failure 11
NAK-generated packet number error.
Initial Actions
Switch the power off, then on. If the problem continues, check the connections at the MCU
PWB and the I/F PWB. Check that the DDI cables from the Network Controller (NC) to the IOT
are secured and are free from damage.
Procedure
Switch off the power. Disconnect the DDI cables and the network cable from the NC to the IOT.
Switch on the power. The fault, or another DFE communications fault (16-361 through 16-
390) is still present.
Y N
Reload DFE software. If the problem persists, Switch the DDI cables from the NC to the
IOT (switch both ends). If the problem changes, replace the cables.
If the problem continues, verify that the NC is functioning correctly. Refer to the NC ser-
vice documentation.
• Reload IOT software.
• Replace the VSEL PWB (PL 13.1).
• Replace the ESS PWB (PL 13.1).
• Replace the MCU PWB (PL 13.1).
If the problem persists, replace the Network Controller.
09/03
2-337
Status Indicator RAPs
16-380, 16-381