Canon Laser Class 810, Service Manual

Page: 298 / 322

Chapter 16
16-44
16.16.5 Modem Test
16.16.5.1 MODEM Test ((4) MODEM TEST)
0017-7808
MODEM test((4) MODEM TEST)
These tests test modem and NCU transmission and reception. The modem tests check whether signals are sent correctly from the modem by comparing the sound
of the signals from the speaker with the sounds from a normal modem.
End this test by pressing the Stop key.
Relay Test
Press '1'or '2' on the keypad on the Modem test menu to select relay test mode. Use the keypad to operate the various relays of the NCU. '2' on the keypad is used
for 230V machine.
Numeric keypad key 1
The input key and relay are shown below:
F-16-16
Numeric keypad key 2
The input key and relay are shown below:
F-16-17
The touch panel (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 touch panel (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.
Keypad Type Description
1 Relay test Use it to turn on/off a selected relay to execute a switch-over test
2 Frequency test The modem sends tonal signals from the modular jack and the speaker.
4 G3 signal transmission test The modem sends G3 signals from the modular jack and the speaker.
5 DTMF signal reception test Use it to generate the DTMF signal coming from the modem using the
telephone line terminal and the speaker.
6 Tonal signal reception test Use it to monitor a specific frequency and the DTMF signal received from
the telephone line terminal by causing them to be indicated on the LCD (i.e.,
the presence/absence as detected). The reception signal is generated by the
speaker.
8 V.34 G3 signal transmission test The modem sends V.34 G3 signals from the modular jack and the speaker.
Keypad Frequency
1 462Hz
2 1100Hz
3 1300Hz
4 1500Hz
5 1650Hz
RELAY TEST1 OFF OFF
OFF OFF OFF OFF
[1] [2]
[3] [4] [5] [6]
RELAY TEST2 OFF OFF
OFF OFF OFF OFF OFF
[1] [2]
[3] [4] [5] [6] [7]