Brother Z-8550A Service Manual Page 76
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- TROUBLESHOOTING
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Z-8550A, 8560A
9. ADJUSTMENTS
67
9. ADJUSTMENTS
CAUTION
Maintenance and inspection of the sewing machine
should only be carried out by a qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord at the following times.
The machine may operate if the treadle is depressed
by mistake, which could result in injury.
• When carrying out inspection, adjustment and
maintenance
• When replacing consumable parts such as the
rotary hook and knives
If the power switch and air need to be left on when
carrying out some adjustment, be extremely careful
to observe all safety precautions.
Use both hands to hold the machine head when
tilting it back or returning it to its original position.
If only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Do not touch the face plate knives when opening the
thread take-up guard cover.
If they are touched, injury may result.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
When removing the needle plate, auxiliary needle
plate and knife unit, use a screwdriver that matches
the size of the screw heads.
If a screwdriver that does not match the size of the
screw heads is used, it may damage the screw
heads and result in injury to the operator or damage
to the articles being sewn.
9-1. Actuator position
The installation position of the actuator (1) can be adjusted
as shown in the illustration.
Adjust so that it is in a position where it is easy to operate.
NOTE:
If using a thread wiper device (option), adjust the position
of the actuator (1) within the range of (A) so that it does
not touch the thread wiper.
1. Loosen the two screws (2).
2. Move the switch installation plate (3) to move the actuator
(1) to the desired position.
3. Tighten the two screws (2).
3506M
3507M
<Rear side>
- Z-8550A 1
- Z-8560A 1
- SAFETY INSTRUCTIONS 3
- DANGER 3
- CAUTION 3
- Environmental requirements 4
- Installation 4
- Cleaning 5
- Maintenance and inspection 6
- Oil pan 7
- (For Europe) 7
- CONTENTS 8
- 1. MACHINE SPECIFICATIONS 10
- 2. SEWING PATTERN 11
- 3. FUNCTION SETTINGS 12
- 3-3. Data initialization 23
- Green display 24
- Orange display 24
- DANGER 30
- 0) so that the 31
- (Initial setting is “0”) 31
- 4. USING CF CARDS 32
- 5. MECHANICAL DESCRIPTIONS 41
- 5-3. Zigzag mechanism 43
- 5-4. Presser foot mechanism 44
- 5-5. Feed mechanism 46
- 5-6. Lubrication mechanism 49
- 6. DISASSEMBLY 55
- 6-1. Covers 56
- 6-2. Presser foot mechanism 57
- 6-3. Needle bar mechanism 57
- 6-4. Zigzag mechanism 58
- 6-5. Rotary hook mechanism 60
- 6-6. Lubrication mechanism 61
- 6-7. Feed mechanism 61
- <Knife unit> 62
- 7. ASSEMBLY 64
- 7-2. Feed mechanism 65
- 7-3. Lubrication mechanism 66
- 7-4. Zigzag mechanism 67
- 7-5. Needle bar mechanism 68
- 7-6. Rotary hook mechanism 69
- 7-7. Presser foot mechanism 70
- 7-8. Covers 71
- Be careful of the knives 71
- CAUTION 73
- Setting for 1st turn 75
- Setting for 2nd turn 75
- 9. ADJUSTMENTS 76
- 9-3. Thread tension spring 78
- 9-4. Presser foot height 79
- 9-5. Feed dog height 79
- 9-6. Feed dog angle 80
- 9-9. Needle and feed timing 81
- 9-10. Needle bar height 82
- 9-13. Needle zigzag load 85
- Maximum zigzag width 86
- CAUTION 87
- 9-18. Adjusting the treadle 88
- Should not touch 93
- 10-2. Applying grease 95
- 11. ELECTRICAL MECHANISM 97
- 11-3. Description of fuses 99
- Z-8550A, 8560A 100
- 11-4-1. Connector positions 101
- 11-5. Troubleshooting 103
- 11-5-2. Diagnosis flowchart 104
- 11-5-3. Remedy 106
- 11-6. Wiring diagrams 110
- 12. TREADLE UNIT 112
- . Types 112
- 1) Entering signal settings 114
- 5) Ending the settings 115
- 13. STANDING OPERATION PEDAL 116
- 13-2. Connectors 117
- 14. TROUBLESHOOTING 118
- 15. ERROR CODES 123
- LCD display character list 126
- SERVICE MANUAL 128
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