Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
13-189
Cause
• The line condition is poor and EOR-NULL
can not be properly received.
• The line condition is poor and the signal
can not be properly received.
Countermeasure
• Raise the modem output level in #2 MENU
parameter 007, so the other party’s
machine can properly receive EOR-NULL.
• Resend.
##0772 [TX] DCN received after EOR-NULL output
Cause
• The other party’s machine’s page buffer is
full, or RNR was received after output of
EOR-NULL because the machine was in
use, and after RR output a significant signal
could.
Countermeasure
(1) Set ECM Tx to “OFF” in the user mode
data entry’s Tx settings.
(2) After registering one-touch or coded dial-
ing in the user mode, lower Tx speed set-
ting using detailed settings.
##0773 [TX] Limit for the number of protocol signal re-transmissions is exceeded or T5 time
limit (60 seconds) is exceeded after EOR-NULL output
Cause
• The line condition is poor and frequently the
other party’s machine can not properly
receive the image signal.
• The other party’s machine malfunctions due
to echo.
Countermeasure
(1) Raise the modem output level in #2
MENU parameter 007, so the other
party’s machine can properly receive the
image signal.
(2) Adjust the NL equalizer in #2 MENU
parameter 005, so the other party’s
machine can properly receive the image
signal.
(1) Refer to #1 SSSW-SW03 for echo coun-
termeasures.
(2) When registering in autodial, add a long
pause after the telephone number so
there will be no response to the other
party’s first DIS.
(3) When calling using the dial button, man-
ually press the start button after you have
heard the other party’s first DIS.
(4) Have the other party lower the output
level so the other party’s machine will not
receive echoes.
##0774 [TX] ERR received after EOR-NULL output
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