Xerox WorkCentre 5790 Series, Service Manual

Page: 608 / 1610

May 2013
2-576 Xerox® WorkCentre® 5790 Family
20D
Status Indicator RAPs
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
WARNING
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.
WARNING
Do not touch the test pads on the embedded fax PWB while the fax cable is connected
to the machine. Dangerous voltages may be present that could cause death or injury.
Go to the 20A Fax Entry RAP and complete all of the initial actions.
Procedure
NOTE: Refer to the Fax NVM Document for the fax NVM values.
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,
PL 26.10 Item 3 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 Fax tone is
present.
Y
N
(W/O
TAG X-001 ) Reset the value at the following location:
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 the
20G Embedded Fax Checkout
Install new components as necessary:
• Embedded fax PWB, PL 20.10 Item 4 .
• (W/O TAG X-001 ) 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 (W/O
TAG X-001 ) after V34-PH2 / V34-PH3 or EQM
(Eye Quality Monitor) 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.
• If mains noise, install a (W/O TAG X-001 ) embedded fax PWB, PL 20.10 Item 4 and an
extended fax PWB, PL 20.10 Item 2 . Use line 1.
• Disable the advanced fax features. Login to Customer Administration Tools, GP 24 .
Select Fax Setups / Receive Defaults / Advanced Capabilities / Disable.
• Disable V34 (Super G3). Reset the value at the following locations:
– 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.