Xerox WorkCentre 5790 Series Service Manual page 607

20C Unable To Send A Fax To Some Machines RAP
Use this RAP to isolate components which contribute to a failure to send a Fax to some
machines.
Initial Actions
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to GP 14. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
Go to the 20A Fax Entry RAP and complete all of the initial actions.
Procedure
NOTE: Refer to the Fax NVM Document
The correct number is being dialled to make the connection. The connection is made.
Y N
The exchange is not processing the digits correctly, the machine needs longer pause
between digits.
• Insert a pause (,) between the first and second digit of the dial string. In the Dialling
Options select Dialling Characters / Pause / Add Character / Save.
• Change the setting at location 20-640 FaxDTMFInterdigitTime to 100.
Call the fax number from a known good telephone and listen for the answer fax tone. The Fax
tone is heard.
Y N
Fax on remote end is not picking up or no Fax is connected. Advise customer to check the
machine at the remote end.
Enter dC109 and print a Protocol Report. The Protocol Report shows RNR (Receive Not
Ready) is received from the remote Fax repeatedly until time out and DCN (Disconnect).
Check communication failure after V34-PH2 / V34-PH3 or DCS / TCF. The
receives and prints the Fax.
Y N
Compatibility problem with remote Fax.
• Print a Protocol Report and check for communication errors.
• Line quality too poor for Super G3 to function correctly. Possible mains interference
on line.
• Disable V34 (Super G3). Reset the value at the following locations:
– 20-287 T30MaxSpeedL1Tx = 11 (14400).
– 20-288 T30MaxSpeed2Tx = 11 (14400).
(W/O TAG X-001) If mains noise, install and use line 2 instead of line 1.
• (W/O TAG X-001) When sending to a PC fax or fax server that has an ISDN card,
need to customize the CEQ values. Set the value at location 20-832 and 20-833 to
0.
The Protocol Report shows MCF (Message Confirmation) is not sent by the remote Fax (last
page), only DCN (Disconnect). The failure report printed out but the remote fax prints mul-
tiple copies of the job or failed page.
Xerox® WorkCentre® 5790 Family
WARNING
for the fax NVM values.
remote
Y N
The Fax is working correctly. Send a three page test Fax to a known good Fax machine.
Print a Protocol Report and check for errors.
The machine will resend up to 10 times before printing the failure report.
Enter Tools / Fax Setups / Fax Transmission Defaults / Automatic Resend. Set Auto Resend
Attempts to 1 or 2.
Fax
May 2013
2-575
Status Indicator RAPs
20C