MFJ-413/417 Instruction Manual Pocket Morse Code Tutor
8
3. Each button is automatically tested for shorts to ground.
4. Press the Speed button to test it for proper connection. The Tutor responds
with a beep. Release the button.
5. Press the Group button to test it for proper connection. The Tutor responds
with a beep. Release the button.
6. Press and hold the Set/Play button for one second. The Tutor responds with
two beeps. Release the button. If the button is released before the second
beep, the next three steps are skipped.
7. It then automatically tests the logic line Vpp (shown on the schematic).
8. The non-volatile memory circuitry is automatically tested. Notice this step
resets the Tutor to its factory default settings for Instant Play.
9. The non-volatile memory integrity is automatically tested.
10. When all is okay, a repetitive message
"PASS"
is sent at 13 WPM. However,
if something is wrong a repetitive message such as
"GROUP FAIL"
is sent at a
slower speed of 5 WPM.
11. Turn off the power after confirming the audio has good quality.
Failure Message Meanings:
•
SPEED FAIL
Speed button is shorted or improperly connected.
•
GROUP FAIL
Group button is shorted or improperly connected.
•
SET FAIL
Set/Play button is shorted or improperly connected.
•
VPP FAIL
Logic line Vpp is not pulled low by a resistor.
•
EEPROM FAIL
Non-volatile memory circuitry is improperly connected.
•
MEMORY FAIL
Non-volatile memory integrity is bad.
Factory Default Settings:
• Farnsworth mode Off
• Interactive mode Off
• Combine mode On
• Speed 13 WPM
• Group 5-character per group
• Set All Beginner sets
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