Canon MF4690 Service Manual - Page 169
Relay Test, Frequency Test
UPC - 013803076820
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of the signals from the speaker with the sounds from a normal modem. End this test by pressing the Stop key. 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. Chapter 14 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. 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: [1] [2] RELAY TEST1 OFF OFF OFF OFF OFF OFF [3] [4] [5] [6] Numeric keypad key 2 The input key and relay are shown below: F-14-9 [1] [2] RELAY TEST2 OFF OFF OFF OFF OFF OFF OFF [3] [4] [5] [6] [7] F-14-10 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 Frequency 0 462Hz 1 1100Hz 2 1300Hz 3 1500Hz 4 1650Hz 5 1850Hz 6 2100Hz MEMO: The frequency and the output level of individual frequencies are in keeping with the output level set in service mode. 14-29