Pulse-motor power (+85 V) missing. The SDC board is not putting out the +85 V that drives the stepping motors; fuse F1 is usually blown because of a short circuit.
Shown on JUKI machines including AMS-210E, AMS-210EN, AMS-221EN, AMS-224EN, AMS-251, AP874, AP876, APW-895N, APW-896N, DDL-9000CF, DDL-9000CS, DP-2100 and others.
What to check
- Check fuse F1 on the SDC board and look for a short in the +85 V wiring or the MAIN board before replacing it.
Switch the machine off before touching any connector. If the code comes back after these checks, the fault is usually in the 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 110); LBH-1790 English instruction manual (page 60); DP-2100 instruction manual (page 144); DP-2100 eg ver04 instruction manual (page 141); LBH-1790A instruction manual (page 77). 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 E903 mean?
Pulse-motor power (+85 V) missing. The SDC board is not putting out the +85 V that drives the stepping motors; fuse F1 is usually blown because of a short circuit.
How do I fix JUKI error E903?
Check fuse F1 on the SDC board and look for a short in the +85 V wiring or the MAIN board before replacing it. If the code stays, the fault is usually in the control boxes, PCBs and sensors.
Which JUKI machines show E903?
In the manuals we have read, E903 appears on AMS-210E, AMS-210EN, AMS-221EN, AMS-224EN, AMS-251, AP874, AP876, APW-895N, APW-896N, DDL-9000CF and other models.