25
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
reverse stitch 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 switching regulator
• Replace the printed circuit board A
2. The sewing machine lamp does not light up:
• Replace the printed circuit board L
• Replace the printed circuit board A
SELF-DIAGNOSTIC TEST
Turn the power switch on while
simultaneously pressing needle
up/down button and thread
cutter button.
Press the needle up/down button within the 1.5 seconds to enter the
self-diagnostic mode.
The LCD will indicate "----".
Summary of Contents for 5270QDC
Page 1: ...First Edition 06 March 2020 SERVICE MANUAL PARTS LIST MODEL 5270QDC For Europe only...
Page 39: ...37 TOUCH PANEL KEY POSITION ADJUSTMENT GUIDE Print this illustration guide to its actual size...
Page 52: ...50 MODEL 5270QDC PARTS LIST 1 2 3 4 6 5 7 8 9 10 11 12 13 14 17 15 18 19 20 9 21 21 22 23 16...
