Canon iR2020 Series Service Manual page 313

Numeric keypad key 2
The input key and relay are shown below:
The LCD is turned on or off in relation to the transmission of the relay operation signal as is operated on the keypad; for this reason, you cannot use the LCD to
check a fault on a single relay.
Frequency Test
A press on '2' on the keypad from the MODEM test menu selects the frequency test.
In this test, signals of the following frequencies from the modem are transmitted using the telephone line terminal and the speaker. To select a different frequency,
use the keypad.
MEMO:
The frequency and the output level of individual frequencies are in keeping with the output level set in service mode.
G3 Signal Transmission Test
A press on '4' on the keypad from the MODEM test menu selects the G3 signal transmission test. In this test, the following G3 signals from the modem are trans-
mitted using the telephone line terminal and the speaker. To select a different transmission speed, use the keypad.
MEMO:
The output level of individual signals is in keeping with the setting made in service mode.
DTMF Signal Transmission Test
A press on '5' on the MODEM test menu selects the DTMF signal transmission test. In the test, the following DTMF signals from the modem are transmitted using
the telephone line terminal and the speaker. The number pressed on the keypad selects a specific DTMF signal.
MEMO:
The output level of individual signals is in keeping with the setting made in service mode.
Tonal/DTMF Signal Reception Test
A press on '6' on the keypad from the MODEM test menu selects the tonal signal/DTMF signal reception 0 test. In this signal, the tonal signal/DTMF signal received
from the telephone line terminal can be checked to find out if it was detected by the modem.
RELAY TEST1 OFF OFF
OFF OFF OFF OFF
[3]
RELAY TEST2 OFF OFF
OFF OFF OFF OFF OFF
[3] [4] [5]
Keypad Frequency
1 462Hz
2 1100Hz
3 1300Hz
4 1500Hz
5 1650Hz
6 1850Hz
7 2100Hz
Keypad Transmission speed
0 300bps
1 2400bps
2 4800bps
3 7200bps
4 9600bps
5 TC7200bps
6 TC9600bps
7 12000bps
8 14400bps
[1] [2]
[4] [5] [6]
F-14-11
[1] [2]
[6] [7]
F-14-12
Chapter 14
14-37