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Brother Z-8550A manual 128

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SERVICE MANUAL

Printed in Japan

Z-8550A, 8560A

I5120896B 2006. 12. B (1)

Contents

Page Page [1] Safety indications and their meanings Indications Symbols [2] Notes on safety Sewing Cleaning [3] Warning labels Page CONTENTS 8.CHANGING THE FEED AMOUNT TO LONG STITCH SPECIFICATIONS (from 2.0mm to 5.0mm) ELECTRICAL MECHANISM 1. MACHINE SPECIFICATIONS 2. SEWING PATTERN 3. FUNCTION SETTINGS 3-1.Setting memory switches 3-2.List of memory switch settings 3.FUNCTION SETTINGS Memory switch No. 16 Memory switch No. 31 Memory switch No. 47 <When set to stitch counter actuator <Settings for memory switch No. 74 - 77 Memory switch No. 80 Memory switch No. 90 Memory switch No. 111 Memory switch No. 125 Memory switch No. 132 3-3.Data initialization <Initialization of memory switch setting data only <Initialization of custom patterns only Deleting all custom pattern data 3-3-2.When data is initialized automatically 3-4.Error history checking method 3-5.Software version checking method 3-6.Checking input and output Treadle unit and standing operation pedal operation Solenoids (only enable for EZ - 40 panel) 3-7.DIP switch setting method 3-8.Needle zigzag home position adjustment procedure 4. USING CF CARDS 4-1.Precautions when handling CF cards (commercially available) 4-2.Structure of a CF card folder 4-3.Preparation for reading/writing data 4-4.Reading additional sewing data into the sewing machine 4-5.Writing additional sewing data to CF cards 4-6.Reading memory switch data into the sewing machine 4-7.Writing memory switch data to a CF card 4-8.Updating the control program version 4-8-2.Restoring the control program if an error occurs during version updating 4-9.Writing error log data to CF cards 5. MECHANICAL DESCRIPTIONS 5-1.Needle bar and thread take-upmechanisms 5-2.Lower shaft and shuttle race mechanisms 5-3.Zigzag mechanism 5-4.Presser foot mechanism <For options 5-5.Feed mechanism <Dial feed mechanism <Backtacking mechanism <8550A-A31,8560A 5-6.Lubrication mechanism Page 5-7.Thread trimmer mechanism (8560A only) 5-8.Tension release mechanism <During thread trimming (8560A only) <Upper thread feeding mechanism (8560A only) 5-9.Thread wiper mechanism (8560A only, optional device) 6. DISASSEMBLY 6-1.Covers 6-2.Presser foot mechanism 6-3.Needle bar mechanism 6-4.Zigzag mechanism Page 6-5.Rotary hook mechanism 6-6.Lubrication mechanism 6-7.Feed mechanism 6-8.Thread trimmer mechanism (8560A only) 6-9.Thread wiper mechanism (8560A only, optional device) 7. ASSEMBLY 7-1.Thread wiper mechanism (8560A only) 7-2.Feed mechanism 7-3.Lubrication mechanism 7-4.Zigzag mechanism 7-5.Needle bar mechanism 7-6.Rotary hook mechanism 7-7.Presser foot mechanism 7-8.Covers Be careful of the knives 7-9.Thread wiper mechanism (8560A only, optional device) 8.CHANGING THE FEED AMOUNT TO LONG STITCH SPECIFICATIONS (from 2.0mm to 5.0mm) 8.CHANGING THE FEED AMOUNT TO LONG STITCH SPECIFICATIONS (from 2.0mm to 5.0mm) Changing the maximum feed amount 8. CHANGING THE FEED AMOUNT TO LONG STITCH SPECIFICATIONS (from 2.0mm to 5.0mm) Turning the stitch length dial (1) to a setting greater than 9. ADJUSTMENTS 9-1.Actuator position 9-2.Adjusting the safety switch position 9-3.Thread tension spring <Thread tension spring position <Thread take-upspring tension 9-4.Presser foot height 9-5.Feed dog height 9-6.Feed dog angle 9-7.Feed dog forward/back and sideways position <Sideways clearance X adjustment <Forward/back clearance Y and sideways clearance X adjustment 9-8.Feed amounts for reverse stitching and condense stitching 9-9.Needle and feed timing 9-10.Needle bar height 9-11.Needle zigzag forward/back position 9-12.Needle zigzag sideways position 9-13.Needle zigzag load 9-14.Needle and rotary hook timing 9-15.Bobbin case holder bracket position 9-16.Adjusting the rotary hook lubrication amount <Checking the lubrication amount <Adjusting the lubrication amount 9-17.Adjusting the presser foot floating amount (minute lifting amount) 9-18.Adjusting the treadle 3534M <Forward depression sensitivity adjustment <Backward depression sensitivity adjustment <Adjusting the treadle stroke 9-19.Adjusting the quick reverse device (8550A-A31,8560A) 9-20.Adjusting the tension release during thread trimming (8560A only) 9-21.Adjusting the position of the thread trimming cam (8560A only) <Horizontal position adjustment <Rotating direction adjustment 9-22.Adjusting the tension of the plate spring (8560A only) 9-23.Adjusting the thread trailing length after thread trimming (8560A only) 3810M <Standard position for upper thread feeding device 3811M <Adjusting the upper thread trailing amount 9-24.Adjusting the thread wiper (8560A only, optional device) <Height adjustment <Forward/back adjustment 10. APPLYING GREASE (When “GrEASEUP” appears) 10-1.To continue sewing temporarily without applying grease 10-2. Applying grease 10-3.Resetting the cumulative operating time 11. ELECTRICAL MECHANISM 11-1.Precautions while carrying out adjustments 11-2. Control box internal configuration 11-3. Description of fuses 11-3-2. Main P.C. board (fuses and fuse resistors) 11-4.Description of connectors Page 11-5.Troubleshooting Checking connectors Diagnosis flowchart Remedy 11-5-2.Diagnosis flowchart Page 11-5-3.Remedy Problem No Page Problem No. 4, 5, 6 Problem No. 8 Page 11-6.Wiring diagrams Page 12. TREADLE UNIT 12-1. Types 12-2.Standard setting values 12-3.Standard settings for treadle depression stroke 1) Entering signal settings 2) Storing the maximum forward depression amount 3) Storing the neutral position 4) Storing the maximum backward depression amount 5) Ending the settings 13. STANDING OPERATION PEDAL <Related table parts 13-1.Installing the foot plug 13-2.Connectors <At foot plug <At pedals 14. TROUBLESHOOTING Page Page Caution • It is needle sticking in the material. If the needle breaks search for all pieces until the whole of the needle is found again Page 15. ERROR CODES <Switch-relatederrors <Upper shaft motor-relatederrors <Feed mechanism-relatederrors <Communication and memory-relatederrors <Data editing-relatederrors <P.C. board-relatederrors 16. SEGMENT DISPLAY DEFINITION TABLE MEMO