Canon FAX-B820 Service Manual

Also see for FAX-B820: User guide User guide

Contents

b) G3 signal output testIn the MODEM, NCU test menu, press numeric button ‘2’ and the G3 signal output test is selected.A G3 signal is output from the modem via the telephone line connection terminal and the speaker.The transmission speed can be changed using the numeric buttons.Numeric button Speed0 300 bps1 2400 bps2 4800 bps3 7200 bps4 9600 bps5 TC7200 bps6 TC9600 bps7 12000 bps8 14400 bps*The output level for each frequency depends on the service data output level settings.c) Tone signal RX testIn FAX MODEM TEST menu, press numeric key 3 to select Tonal Signal RX Test.This test checks that modem detects tonal signal sent via telephone line terminal.Method:1) Prepare another machine and connect its telephone line terminal with that of machine under testusing modular jack.2) Both machines: enter FAX MODEM TEST menu.3) Machine under test: select [Tone Signal Reception Test] mode.4) Other machine: select [Frequency Test] mode, and set the machine to send out 1100 Hz (CNG)and 1300 Hz (FC).5) Machine under text: check if the machine can detect 1100 Hz (CNG) and 1300 Hz (FC) sent fromthe other machine.Tone Signal Reception Test001 nn=None: when the machine detects 1300 Hz signaln=5 : when the machine detects DTMF 5n=56 : when the machine detect 6 following DTMF 5Figure1-13 Tonal Signal Reception Test1-41