Motor encoder error (A/B phase). The A and B position signals from the main motor encoder are missing or wrong.
Shown on JUKI machines including 910N, AMS-210E, AMS-210EN, AMS-221EN, AMS-224EN, AMS-251, AP874, AP876, APW-895N, APW-896N, DDL-8700B, DDL-9000CS and others.
What to check
- Check the motor signal connector (CN30 on DDL-8700B type boxes, CN14 on the LK-1900A SDC board) for a loose or broken cord; the cord often gets trapped in the machine.
- Replace the encoder or motor if the cord is good.
Switch the machine off before touching any connector. If the code comes back after these checks, the fault is usually in the servo motors or control boxes, PCBs and sensors.
Request a repair for this error or WhatsApp the code and your model to +91-9643480908 (Monday to Saturday, 10:00 AM to 8:00 PM (closed Sunday)).
Source
Summarised by Shankar Sewing from the LK-1900A engineer manual (page 109); DDL-8700B instruction manual (page 50); DDL-9000CS instruction manual (page 57); DDL-900A instruction manual (page 51); DLU-5494N instruction manual (page 52). The manual has the complete procedure and connector numbers for your exact model.
Other JUKI error codes
E007 Motor overload · E011 External media not inserted · E012 Read error on external media · E013 Write error on external media · E015 Sewing area exceeded · E016 External media full · E019 File size over · E032 File not compatible · E302 Machine head tilt detected · E303 Main shaft Z-phase sensor error · E703 Panel connected to the wrong machine · E704 System version mismatch · all JUKI codes
Frequently asked questions
What does JUKI error E730 mean?
Motor encoder error (A/B phase). The A and B position signals from the main motor encoder are missing or wrong.
How do I fix JUKI error E730?
Check the motor signal connector (CN30 on DDL-8700B type boxes, CN14 on the LK-1900A SDC board) for a loose or broken cord; the cord often gets trapped in the machine. Replace the encoder or motor if the cord is good. If the code stays, the fault is usually in the servo motors or control boxes, PCBs and sensors.
Which JUKI machines show E730?
In the manuals we have read, E730 appears on 910N, AMS-210E, AMS-210EN, AMS-221EN, AMS-224EN, AMS-251, AP874, AP876, APW-895N, APW-896N and other models.