Xerox DocuColor 2240 Service Manual page 724

121-335 Foreign Interface Wake Up Answer Fail
The WAKE UP ANSWER cannot be received.
Procedure
Do not attempt to troubleshoot this circuit by jumpering the Transmit Data or Receive Data
lines (P343 pins 4 ~ 6 on the ESS PWB). This will destroy the serial port on the ESS PWB.
NOTE: Refer to Figure 1 (Circuit Diagram).
Switch the power off, then on. The problem continues.
Y N
Check for loose connections or dirty contacts between the ESS PWB and the Foreign
Interface, and between the FI and the attached device.
Switch off the power. Disconnect the device from the FI. Connect a jumper from pin 1 to pin 3
on J940 on the Foreign Interface. Switch on the power. The fault code is still present.
Y N
Repair or replace the Foreign Device.
Reinstall the ESS software.
If the problem continues, replace the Foreign Interface
If the problem continues, replace the ESS PWB
Figure 1 121-335 RAP Circuit Diagram
Initial issue
DC 3535/2240/1632, WC M24
CAUTION
(PL 10.3)
(PL 13.1).
121-336 Unknown Foreign Device
The connected Foreign Device type was unknown at WAKE UP ANSWER.
Procedure
Switch the power off, then on. The problem continues.
Y N
Check for loose connections or dirty contacts between the ESS PWB and the Foreign
Interface, and between the FI and the attached device.
Replace the Foreign Device.
09/03
2-691
Status Indicator RAPs
121-335, 121-336