Brother International PR-620 Users Manual - English - Page 220

Symptom Probable Cause Remedy Reference Page The automatic needle-threading Consult your nearest authorized mechanism is broken. dealer. Adhesive is attached to the needle. Replace the needle. p.63 The fabric is not taut. Firmly set the fabric in the embroidery frame so that it is taut. p.28, 67 The upper thread breaks. The thread quality is poor. The embroidery data contains stitches with a pitch of zero. The thread quality is too weak due to age of thread. Replace thread. Delete all stitches with a zero pitch. p.150 The embroidery data contains many stitches with an extremely small pitch. Delete all stitches with a small pitch. p.150 The thread density of the embroidery data is too fine. Three or more overlapping stitches are being sewn. Using a data design system, correct the thread density and overstitching settings in the embroidery data. p.100 The bobbin thread is not correctly threaded. Correctly thread the bobbin thread. p.19 The bobbin thread breaks. The bobbin is scratched or does not rotate smoothly. The bobbin case is damaged. The thread is tangled. Replace the bobbin. Replace the bobbin case. Remove the thread jammed and clean the hook. p.18 p.18 p.193 A bobbin designed specifically for this machine is not used. Use the correct bobbin. p.15 The upper thread is not threaded Thread the upper thread correctly. correctly. p.35 The needle is bent or blunt. Replace the needle with a new one. p.15, 63 Stitches are skipped. The needle is not installed correctly. Dust has accumulated under the needle plate or in the hook. Correctly install the needle. Clean the hook and the needle plate. p.63 p.193, 194 The needle and the hook are not Consult your nearest authorized correctly passing each other. dealer. The thread twist is either too tight or too loose. Improper twisting results in irregular loop formation. Try using a new spool. The thread is tangled. Use tweezers to remove any tangled thread from the hook. 7 The embroidery pattern is misaligned. The fabric is not well framed in the embroidery frame (for example, the fabric is not taut). If the fabric is not taut, the pattern may become misaligned or the stitching may shrink. Be sure to correctly frame the fabric in the embroidery frame. p.28, 67 The embroidery frame is too Use an embroidery frame that large for the size of the matches the size of the p.65 embroidery. embroidery. Troubleshooting 203