Canon iR1600 Series, Service Manual

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CHAPTER 13 TROUBLESHOOTING
COPYRIGHT© 2002 CANON INC. 2000 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002
13-191
5.T1 Timer: No.11 of Service Soft Switch #3 NUMERIC param.
• Increase the T1 timer setting:
Increase the setting of No.11.
The T1 timer is used to set the period of time in which a line connection is recognized
for reception, i.e., in which the machine waits for a significant signal from the other party
after transmission of DIS. The line will be disconnected if no significant signal is received
during the period.
6.RTN Signal Transmission Condition: No. 02, 03, and 04 of Service Soft Switch #3
NUMERIC param.
• Loosen the RTN signal transmission condition:
Increase the settings of No.02, 03, and 04.
No.02 is used to set the ratio of the number of error lines to the total number of lines
per page (1% to 99%).
No.03 is used to set the burst error (number of successive error lines identified as an er-
rors) ; (2 to 99 lines).
No.04 is used to set the number of errors falling short of a burst error (1 to 99 times).
7.Echo Remedy
• A remedy against echoes may be implemented on the transmission side or the
reception side
Remedy 1 for Echo (on the transmission side; relates to international communica-
tions settings)
By the User:
Choose the appropriate international transmission settings when setting auto-dial num-
bers (one-touch dialing, speed dialing).
If international transmission 1 is selected, the 1st DIS from the other party will be ig-
nored.
If international transmission 2 is selected, a 1850Hz tonal signal will be transmitted
when the other party sends DIS.
If international transmission 3 is selected, a 1650Hz tonal signal will be transmitted
when the other party sends DIS.
By the Service Person:
All transmissions may be e set to accommodate international transmission using bits 6,
5, and 4 of #1 SSSW SW03 (service soft switch):
international transmission 1: (bit 6, bit 5, bit 4) = (0, 0, 1)
international transmission 2: (bit 6, bit 5, bit 4) = (0, 1, 0)
international transmission 3: (bit 6, bit 5, bit 4) = (1, 1, 0)
Remedy 2 for Echo (on reception side; addition of 1080-Hz tonal signal before
CED transmission)
Set ‘1’ to bit 7 of SW03 of #1 SSSW (service soft switch) so that a 1080Hz tonal signal
will be transmitted before CED transmission.