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SEWINGBAR is on line since Sept.19, 2015, SEWINGBAR is designed since Aug.29, 2013. China No.1 multi-language cross-border e-commerce platform in sewing machinery industry. Meanwhile, it is also a business venture platform for professionals in clothing, footwear, cap, luggage, home textile, toy, handicraft and sewing machine industries as well as creates business opportunities and provides cooperative platform for sewing machine industry.
Operation Video

Qixing QD686 Electronic System Fault Analysis and Inspection Methods

7 Comments

repair_副本

  • The LED doesn’t work

check the F2 fuse, it might turn off

图1

check DB1, inspect whether the voltage output is normal or not

图2

check R33 resistance

图3

  • The panel display nothing

Check the R1 and R2 resistance

图4

Check the ZN1 voltage regulator tube.

图5

  • It shows OFF when opening

Check R129 resistance

Ma un farmacista probabilmente ti offrirà il costoso prodotto a marchio qui e anche se presentano alcune differenze, non è possibile ottenere un’erezione sufficiente. Cialis è assegnato a molti uomini che hanno problemi con la potenza.

图6

Check R130 resistance and U11 Optocoupler

图7

  • The fault shows that the functions of cutting, sweeping lines, rewind seam, presser foot are faulty

Check 7A fuse

图8

Check U20/74HC04D

图9

Check Q1-Q4

图10

  • The fault is E-7

Check the socket of motor and encoder

图11

Check the motor and encoder

图12

  • The fault is E-8

Check the switch of handle rewind seam

图13

Check position sensor

图14