19
DC4030P
SELF DIAGNOSTIC TESTS
PREPARATION:
* Turn off the power switch.
* Shift the bobbin winder spindle to the left.
* Raise the feed dog.
* Shift the slide volume to the left.
* Remove the presser foot and raise the presser foot lifter.
* Turn the handwheel toward you to raise the needle to its highest position.
* Connect the foot controller to the machine.
NOTE:
* Be careful: The sewing machine may start running by its own while in test mode.
* Turn off the power switch before replacing any parts.
* Repeat the diagnostic test until the problems has been resolved.
* You can skip steps in the diagnostic procedure and go directly to the test you want to perform.
(Enter self-diagnostic mode, then press the needle up/down button until the step number of the re-
quired test is indicated.)
PRELIMINARY TEST:
Turn on the power switch. If any of following problems occur, take the recommended actions in the order
they are shown.
* The machine does not respond when the power switch is turned on.
1. Check each connector connection.
2. Replace the machine socket.
3. Replace the printed circuit board "A".
4. Replace the machine socket.
5. Replace the power transformer.
* The sewing machine light does not light up.
1. Replace the lamp.
2. Replace printed circuit board "A".
TO ENTER THE SELF-DIAGNOSTIC MODE:
If you do not press the next button within 2.5 sec, the machine will revert to normal sewing mode. Should this occur,
start over again from step no. 1.
NO.1 NO.2 NO.3
Turn the power switch on while
simultaneously pressing the
needle up/down button and the
reverse button.
Press the reverse button five times
to select menu item "6".
Press the needle up/down button.
