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To enter self-diagnostic mode:
Preparation:
1. Turn the power switch off.
2. Move the bobbin winder spindle to the left.
3. Raise the feed dog.
4. Set the speed control lever to the left.
5. Remove the presser foot and raise the presser foot lifter.
6. Turn the hand wheel toward you to raise the needle to its highest position.
Notes:
• Be careful: the sewing machine may start running in its own while in test mode.
• Turn off the power switch before replacing any parts.
• Repeat the diagnostic test until the problem 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 select the step number of the diagnostic test you require by
pressing the start/stop button)
To begin:
Turn on the switch, if any of the following problems occur, take the recommended actions in the order
they are shown.
1. The machine does not respond when the power switch is turned on:
• Check each connector connection
• Replace the machine socket
• Replace the Switching regulator.
• Replace the A-board
2. The sewing machine lamp does not light up:
• Replace the light bulb
• Replace the A-board
Self-diagnostic Test
Turn the power switch on
while simultaneously
pressing needle up/down
button and the locking
stitch button.
The LCD display will
indicate “01”.
Press the start/stop button to
enter the self-diagnostic mode.
