Canon GP160F Service Manual page 418

CHAPTER 13 TROUBLESHOOTING
##0753 [TX] Limit for the number of protocol signal re-transmissions is exceeded or T5 time
limit (60 seconds) is exceeded after PPS-NULL output
Cause
• The other party's machine's page buffer is
full, or RNR was received after output of
PPS-NULL because the machine was in
use, and after RR output a significant signal
could not be properly received.
##0754 [TX] Limit for number of protocol signal re-transmissions is exceeded after PPS-NULL
output
Cause
• The line condition is poor. After PPS-NULL
output, PPR was received 4 times and CTC
was output, but the other party's machine
can not receive properly.
• The line condition is poor. After PPS-NULL
output, PPR was received 4 times and CTC
was output, but a significant signal can not
be properly received.
##0755 [TX] A significant signal can not be detected and the limit for number of protocol sig-
nal re-transmissions is exceeded after PPS-MPS output
Cause
• The line condition is poor and PPS-MPS is
not transmitted properly.
• The line condition is poor and the signal
can not be received properly.
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Countermeasure
(1) Set ECM Tx to "OFF" in the user mode
data entry's Tx settings function settings
(2) Lower the Tx speed setting in the user
mode.
Countermeasure
• Raise the modem output level in #2 MENU
parameter 007, so the other party's
machine can properly receive CTC.
• Have the other party raise the output level
so the signal can be received properly.
Countermeasure
(1) Raise the modem output level in #2 MENU
parameter 007, so the other party's
machine can properly receive PPS-MPS.
(2) Adjust the NL equalizer in #2 MENU para-
meter 005, so the other party's machine
can properly receive PPS-MPS.
(3) Add an echo protect tone to the V29
modem signal in #1 SSSW-SW03 Bit 1.
• Have the other party's machine's output
level raised so the signal can be received
properly.
CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)