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CHECKING THE MACHINE SOLENOIDS )
|~T1
Solenoid load of the machine
1. Remove the load connector (12P connector) of the machine from the connector part of the control box.
2. Measure with the tester set in the resistance range xl as follows.
< Machine Head >
•The thread trimming solenoid provided between 4 and 5 is normal if the tester reads approx. 7 ohm.
• The thread wiper solenoid provided between 7 and 8 is normal if the tester reads approx. 5 ohm.
• The actuator provided between 9 and 12 is normal if the tester reads 0 ohm when pressed, and 00 ohm when released.
(Presser Lift >
• The presser lift solenoid provided between 1 and 4 is normal if the tester reads approx. 5 ohm.
• The presser lift switch provided between 2-5 is normal if the tester reads Oohm when pressed, and °°ohm when
released.
2|
Hem sensor
Hem detection connecter
2.
Remove the sensor cord (6P connector) from the
connector part of the control box.
Measure with the tester set in the resistance range
as follows.
If the tester, with the xl range, reads approx.
30-50 ohm at any position between 1 [tester (—)
side] and 4 [tester (+) side], and
00
at any position
between 1 [tester (+) side] and 4 [tester (—) side],
they are normal.
If the tester, with the xl range, reads approx.
30 K-50 Kohm at any position between 2 [tester
(—) side] and 5 [tester (+) side], and °° at any
position between 2 [tester (+) side] and 5 [tester
(—) side], they are normal.
*The resistance value might not always be in the
range mentioned above because it varies according
to the brightness.
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