MFJ MFJ-422E - Page 10

MFJ-422E/422EX Instruction Manual Electronic Keyer Paddle
9
A test is also included to perform testing of the non-volatile memory
(EEPROM) circuitry. This procedure can also be used to reset the contest serial
number to 0001.
To test the non-volatile memory:
1. Turn off the power.
2. Press and lock in the Semi-Auto/Auto button.
3. Squeeze the paddle while turning the power on.
4. The non-volatile memory circuitry is then automatically tested. Notice this
step resets the serial number to 0001.
5. If the non-volatile memory is okay,
"EE PASS" is sent repetitively. If
something is wrong,
"EE FAIL" is sent repetitively.
6. Turn off the power.
Failure Message Meanings:
•
DH FAIL Dash level is shorted or improperly connected.
•
DT FAIL Dot level is shorted or improperly connected.
•
EE FAIL Non-volatile memory circuitry is improperly connected.
•
J3 FAIL Jumper JMP3 is shorted or improperly connected.
•
J4 FAIL Jumper JMP4 is shorted or improperly connected.
•
J5 FAIL Jumper JMP5 is shorted or improperly connected.
•
J6 FAIL Jumper JMP6 is shorted or improperly connected.
•
J7 FAIL Jumper JMP7 is shorted or improperly connected.
•
J8 FAIL Jumper JMP8 is shorted or improperly connected.
•
J9 FAIL Jumper JMP9 is shorted or improperly connected.
•
MG FAIL Message button is shorted or improperly connected.
•
SA FAIL Semi-Auto/Auto button is shorted or improperly connected.
•
SP FAIL Speed control is bad.
•
TN FAIL Tone control is bad.
•
WT FAIL Weight control is bad.