D Unable To Receive A Fax Rap - Xerox WorkCentre 5687 Series Service Manual

20D Unable To Receive A Fax RAP

Use this RAP to isolate components which contribute to the fax not received from the machine.
Initial Actions
Refer to the 20A Fax Entry RAP and complete all of the initial actions.
Procedure
Verify with the customer that PSTN / PABX (public switched telephone network / private auto-
matic branch exchange) line is operational. Use a known good telephone handset or use the
line test tool 600T02133 to check the telephone line. The dial tone is present.
Y N
Ask the customer to request a line check by the telephone company.
Ensure Fax service is enabled and supported on that line by a PBX administrator.
Call the handset from another telephone. The phone rings.
Y N
Ask the customer to request a line check by the telephone company.
Ensure Fax service is enabled and supported on that line by a PBX administrator.
Enable audio line monitor (Enter Tools / Fax Setups / Fax Transmission defaults / audio line
monitor) and set to ON and High volume.
Dial the Fax number and listen for a dial tone or dialing and answer tones. A
present.
Y N
Enter Fax dC Routines, dC131 NVM Read / Write. Reset the value at the following loca-
tion:
20-281 Line1CurrentDetect = 0
20-282 Line2CurrentDetect = 0 A Fax tone is present.
Y N
Go to 20G Embedded Fax Checkout
Install new components as necessary:
• Embedded fax PWB, PL 20.10 Item 4.
• Telephone cable, PL 20.10 Item 8.
The fax is working correctly. Send a three page test fax to a known good fax machine.
Enter dC109 and print a Protocol Report and check for errors.
Reconnect the fax and call the fax number from a independent telephone line and listen for a
Fax tone. The machine answers and a fax tone is heard.
Y N
Print Activity Report. Check for receive calls on the Activity Report. Machine probably
does not bleep to indicate incoming call.
Check that the NVM values at location 20-222 and at location 20-654 to 20-658 are set to
the correct defaults to match the appropriate country setting. The machine answers and
a Fax tone is heard.
Y N
Go to 20G Embedded Fax Checkout
Install new components as necessary:
• Embedded fax PWB, PL 20.10 Item 4.
A B
Status Indicator RAPs
20D
A B
• Compact flash memory, PL 20.10 Item 3.
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.
Receive a three page test Fax from the original Fax machine. Enter dC109 and print a Protocol
Report and check for errors. The Protocol Report shows communication failure after CSI /
DIS (Called Subscriber Identified / Digital Identification Signal) or DCS / TCF (Digital
Command Signal / Training Check) or after V34-PH2 / V34-PH3 or EQM (Eye Quality Mon-
itor) value greater than 5000.
Y N
The problem may be intermittent, inform the operator of the remote machine, they should
report the problem to the telephone company.
Perform the following:
• Confirm line is standard PSTN / PBX analogue line
• Line quality too poor for Super G3 or G3 to function correctly. Possible mains interference
on line. Possible DSL line, not properly filtered.
• Ask customer to request Fax capable service from telephone company.
• Install R6 Embedded Fax PWB
• If mains noise, try installing a 2 line fax PWB and use line 1.
• Enter Fax dC Routines, dC131 NVM Read / Write. Set the value at the following locations:
Fax tone is
– 20-285 T30 Maximum resolution Line 1 Rx = 7
– 20-286 T30 Maximum resolution Line 2 Rx = 7
This sets the receive resolution capabilities for line 1 and line 2 to 400x400 max, this will
shorten the DIS.
• The DIS field is too long to enable successful communication.
Enter Fax dC Routines, dC131 NVM Read / Write. Change location 20-837 USSTOCK-
SUPPORTRAX to 0 (disable).
• Disable V34. Enter dC131 NVM Read / Write and reset the value at the following loca-
tions:
– 20-289 T30MaxSpeedL1Rx = 11 (14400)
– 20-290 T30MaxSpeedL2Rx = 11 (14400)
If the problem still exists try a lower line receive (Rx) speed: 12 = 12000, 13 = 9600, 14 =
7200, 15 = 4800, 16 = 2400
• Send a three page test Fax from a known good fax machine. Enter dC109 and print a Pro-
tocol Report and check for errors.
August 2007
2-716
WorkCentre 5687 Family