Canon GP160DF, Service Manual

Page: 613 / 797

5-25
CHAPTER 5 SELF DIAGNOSIS
Cause
• The line condition is poor. After PPS-EOM
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-EOM
output, PPR was received 4 times and CTC
was output, but a significant 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 CTC.
• Have the other party raise the output level
so the signal can be received properly.
##0764 [TX] Limit for number of protocol signal re-transmissions is exceeded after PPS-EOM
output
Cause
• The line condition is poor and the other
party’s machine can not receive PPS-EOP
properly.
• The line condition is poor and the signal
can not 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-EOP.
(2) Adjust the NL equalizer in #2 MENU
parameter 005, so the other party’s
machine can properly receive PPS-EOP.
(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.
##0765 [TX] A significant signal can not be detected and the limit for number of protocol sig-
nal re-transmissions is exceeded after PPS-EOP output
Cause
• The line condition is poor and PPS-EOP
can not be properly received.
• The stop button was pressed during com-
munications.
Countermeasure
• Raise the modem output level in #2 MENU
parameter 007, so the other party’s
machine can properly receive PPS-EOP.
• Resend.
##0767 [TX] DCN received after PPS-EOP output