MFJ-495 Memory Keyer Instruction Manual
42 © 2001-2009 MFJ Enterprises, Inc.
9. Resume with normal operation.
WARNING: If the MFJ-495 is behaving weird or acting erratic, try resetting the keyer to
factory defaults.
Message Memory Reset
To erase all message memories, hold down the Menu and F4 buttons while turning the power on. A
confirmation message
ERASE ALL MSGS? will display. Press the [YES] button to clear all message
memories, or press the [NO] button to cancel. Release the button to resume normal operation.
Remember that all stored messages will be lost!
To erase a message, select that message for recording. Without typing or keying anything into memory,
end the recording by typing ENTER or holding down any function button for two seconds. The keyer
will respond with an end-of-message character (di-dah-di-dah-dit).
Self Test
A self-test routine will check the functions of the MFJ-495. This routine checks the display, the paddles,
the front-panel buttons, the remote port, the internal memory and the audio circuitry. During the self-test,
you may stop the test by turning off the unit; however, this should NOT be done during the memory test
or the memory could be corrupted. The self-test can be completed in approximately 30 seconds.
Connections of the serial port and keyboard are not necessary for this test.
Note: Performing the self-test will reset the unit to its factory default settings for all four users and
select user 1 as the current user.
Here is the self-test procedure:
1. Turn off the power to the keyer.
2. Connect a paddle to the Key Input jack. Connect a remote control to the Remote port if you have
one.
3. Turn Speed control to full clockwise position. Set volume to a comfortable listening level.
4. Press and hold only the Menu button while turning the power on.
5. The test begins by displaying a copyright message and firmware version number. This is the test of
the display. This message is also sent to the serial port. Release the Menu button before the message
completes.
6. You will be prompted to press the dot and dash paddles. This assumes the dot paddle is connected to
the tip of the plug and the dash paddle to the ring of the plug. The LED should blink once for each
press.
7. You will be prompted to press each of the front-panel buttons. The LED should blink once for each
press.
8. You will be prompted to press the dot and dash connections of the Remote port. If you don’t have a
remote control, you can use the paddle. The LED should blink once for each press.
9. You will be prompted to press the function button connections of the Remote port. If you don’t have
a remote control, you can press the front-panel buttons. The LED should blink once for each press.
10. Test the Speed control by turning it to full counter-clockwise then to full clockwise. The LED should
blink once at each end.
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