Brother International EF4-B561 Service Manual - Page 2

CONTENTS Page 1. FEATURES 1 2. SPECIFICATIONS 2 3. DESCRIPTION OF MECHANISM 9 REEEIREE Needle bar mechanism 9 Under looper mechanism 9 Over looper mechanism 9 Double chain stitch looper mechanism 10 Knives mechanism 10 Feed mechanism 11 Presser foot mechanism 12 4. DISASSEMBLING PROCEDURES 12 Cover 12 Presser foot and feed mechanism 13 Knives mechanism 13 Under looper mechanism 14 Over looper mechanism 14 Double chain stitch looper mechanism 15 Needle bar mechanism 15 5. ASSEMBLING AND ADJUSTMENT PROCEDURES 16 glIIDEIEHITILIE Needle bar mechanism 16 Under looper mechanism 18 Over looper mechanism 19 Double chain stitch looper mechanism 20 Knives mechanism 21 Feed and presser foot mechanism 23 Looper thread take-up and thread- guide mechanism 24 Double chain stitch looper thread take-up and thread guide mechanism 25 Cover 26 6. STITCH LENGTH AND DIFFERENTIAL FEED ADJUSTMENT 27 7. SEWING INSTRUCTION 28 M Single needle two thread 28 W Single needle three thread 29 ❑3 Twin needle four thread 31 W Twin needle five thread 31 8. TROUBLE SHOOTING 32 EHIDEI7REE Thread breakage (Overlock Stitch Needle) 32 Thread breakage (Looper Thread) 33 Skip stitching (Overlock Stitch) 34 Needle breakage 36 Improper thread tension 36 Wrong chaining-off (Overlock Stitch) 36 Excessive wrinkles 37 Slipage of cloth 37