Xerox Phaser 6128 MFP, Service Manual

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4-54 Phaser 6128MFP Service Manual
General Troubleshooting
Corrective Action: Determine whether fault is in the telephone line or at
sending Fax by trying the copy function at sending Fax.
Note
If the telephone line condition is degraded, white horizontal lines, missing
rows, and/or image cut-off at either top or bottom may occur. Branch
connections or an incoming call (Call Waiting) may also cause image
corruption.
b. If copy function is faulty.
Cause: Dirt or fault in printer.
Corrective Action: Clean all parts of the printer or repair the printer.
c. Response signal was not sent.
Cause: No connection. Incorrect setup of dial type, line type, and/or reception
mode.
Corrective Action: Reconnect the telephone line. Reset the dial type, line type,
and/or receive mode to correct settings.
Note
If a call is made to the Fax from a telephone, and the Fax does not emit its
ringing sound, a telephone line fault is highly probable. Be sure an external
telephone line is connected prior checking for a ring tone.
Other Fax Problems
Branch Connection (Parallel Connection)
During Fax reception, if the handset of another telephone on a branch connection
is lifted, the received image may be corrupted or a transmission error may occur.
Branch connection may also interfere with Caller ID, Call Waiting, or the receiving
operation of the connected telephones.
Call Waiting
If a call comes in during Fax sending/reception, the image may be corrupted.
Digital Subscriber Line
Digital Subscriber Line (DSL) is a high-speed digital transmission method using
existing telephone lines. Because the line is used for both voice and data
transmission, various problems may occur, such as noise during spoken
conversation, low sound volume, and mis-dialing. Replacing the splitter may
improve the situation.
The Digital Subscriber Line cannot be directly connected to a fax machine; the line
must be connected via a filter.
There are several types of DSL:
• ADSL (Asymmetric Digital Subscriber Line) – Transmits digital information at a
high-speed bandwidth on phone lines. ADSL provides continuously available
connection with differing upstream and downstream transmission speeds and