Lexmark X63, Service Manual

Page: 45 / 88

Diagnostic Aids
3-9
4400-001
Modem Test
The modem sends various transmit signals on the telephone line.
You can check the following:
– FSK
– Tones: 1100Hz, 1650Hz, 1850Hz, 2100Hz
– G3 training: 14400, 12000, 9600, 7200, 4800, 2400 bps
1. Press Setup.
2. Press Menu until ‘Modem Test’ displays.
DTMF Test
This feature the user or tester verify that the phone keypad buttons
are working correctly.
1. Press Setup.
2. Press Menu until “DTMF Test” displays.
3. Press Start.
To test each button, press each button one at a time. There is a
different tone for each button. Each pressed button displays a
corresponding number or symbol in the LCD panel. If any button
fails, replace the operator panel.
Modem Speed
Default=14400 bps
Select baud rate of 14400, 12000, 9600, 7200, 4800 or 2400 bps.
The lower the baud rate, the larger the acceptable error rate. T30
protocol has a fixed speed of 300 bps in the protocol mode. When
the TX speed is set to 14400 or 12000 bps, the RX speed will be
either V.17 or V.33. When the TX speed is set to 9600 or 7200 bps,
the RX speed will be either V.29 or V.27. When the TX speed is set
to 4800 or 2400 bps, the RX speed will be V.27.
1. Press Setup.
2. Press Menu until ‘Modem Speed’ displays.
3. Press Options to select the TX speed you want. Then press
Start or Setup.