MFJ-495 Memory Keyer Instruction Manual
© 2001-2009 MFJ Enterprises, Inc. 43
11. The unit then tests its non-volatile memory. Notice this step will reset the unit to its factory default
settings for all four users, and select user 1 as the current user.
12. If the unit is okay, a repetitive message
PASS will be displayed and sent as audio. If there is a
problem, a failure message will be displayed and sent.
13. Once you have confirmed that the audio is okay, turn the unit off.
Failure Message Meanings:
•
DASH FAIL Dash paddle (ring of the plug) is shorted or improperly connected.
•
DOT FAIL Dot paddle (tip of the plug) is shorted or improperly connected.
•
F1 FAIL F1 button is shorted or improperly connected.
•
F2 FAIL F2 button is shorted or improperly connected.
•
F3 FAIL F3 button is shorted or improperly connected.
•
F4 FAIL F4 button is shorted or improperly connected.
•
MEMORY FAIL Non-volatile memory circuitry is improperly connected.
•
MENU FAIL Menu button is shorted or improperly connected.
•
PD FAIL Power down circuitry is bad.
•
SPEED FAIL Speed control is bad.
Power Down Circuit Test
This test checks the power down circuitry. It is recommended that this test should be done immediately
after the regular self test described above.
Note: The keyer must be reset to factory defaults before performing this test.
Here is the test procedure:
1. Make sure power to the keyer is off.
2. If the keyer has been reset to factory defaults, skip to step 7; otherwise continue with step 3.
3. Press and hold both the Menu and F2 buttons while turning the power on.
4. Release both buttons when
DEFAULTS RESET appears on the display.
5. Make sure the display shows
[1A][2A][3A][4A]; however, depending on your message
memory, some brackets “[” and “]” might not show on your display.
6. Turn the power off.
7. Press and hold only the F2 button while turning the power on.
8. If the power down circuitry is okay, a repetitive message
PASS will be displayed and sent as audio.
If there is a problem, message
PD FAIL will be displayed and sent as audio repetitively.
9. Turn the power off.
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