84
19X Service Manual
Needle Sensor Test
Instructions
Your machine is equipped with an optical sensor that tells the machine’s computer if the needle is in
the correct position and if it is moving at the correct speed.
Take the following steps to access the testing menu and perform a test to make sure this sensor is
working properly:
1. Open the settings menu and press the
info button
to access the System Info screen.
Info Button
1
1. Tap three times on the blank space underneath the back arrow on the System Info screen to
open the testing menu.
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Tap here
three times.
2
