Brother RH-9820 Service Manual Page 234
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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10. TROUBLESHOOTING
RH-9820
225
10. TROUBLESHOOTING
• If there is a problem with operation, first check that the threads are correctly threaded and that the needle is correctly
installed.
• Please check the following points before calling for repairs or service.
• If the following remedies do not fix the problem, turn off the power switch and consult a qualified technician or the place of
purchase.
CAUTION
Turn off the power switch and disconnect the power cord before carrying out troubleshooting.
Otherwise the machine may operate if the start switch is pressed by mistake, which could result in serious injury.
Problem Cause Remedy Page
Thread tension is too strong.
Adjust the thread tension to the correct
tension.
Instruction
manual
Needle is not installed correctly.
Install the needle so that it faces
correctly.
Instruction
manual
Thread is too thick for the needle.
Select a thread which is suitable for the
needle.
Instruction
manual
Needle and looper adjustment is
incorrect.
Adjust the clearance between the
needle and looper, the needle bar height
or the looper and spreader height.
141, 148
149
Needle, looper, spreader, throat plate or
thread path is damaged.
Repair or replace the respective part(s).
Thread breaks
Thread is not threaded correctly. Thread the thread correctly.
Instruction
manual
Upper thread tension is too strong or too
weak.
Adjust the upper thread tension to the
correct tension.
Instruction
manual
Needle point is broken or bent. Replace with a new needle.
Clearance between needle and looper
tip is incorrect.
Adjust the clearance between the
needle and looper tip.
149
Needle, looper and spreader adjustment
is incorrect.
Adjust correctly.
141
146 - 151
Needle and needle guard adjustment is
incorrect.
Adjust the needle guard. 149
Eye looper tip is blunt.
Repair with an oilstone or replace the
looper with a new one.
Needle is not installed correctly.
Install the needle so that it faces
correctly.
Instruction
manual
Skipped stitches occur.
Needle is too thin.
Select a needle that is suitable for the
sewing conditions.
Instruction
manual
- RH-9820 1
- SAFETY INSTRUCTIONS 3
- DANGER 4
- CAUTION 4
- [3] Warning labels 6
- Belt cover 7
- CONTENTS 8
- 1. MACHINE SPECIFICATIONS 10
- 2. FUNCTION SETTINGS 11
- 0708B 0709B 12
- 2-6. Input checking method 24
- 2-7. Output checking method 27
- 3. READING/WRITING DATA 31
- 3-3. Data read/write mode 32
- 4. MECHANICAL DESCRIPTIONS 35
- 4-4. Feed mechanism 38
- 4-5. Presser foot mechanism 39
- 4-6. Cloth opening mechanism 40
- 4-7. Cutter mechanism 41
- 4-8. Looper mechanism 41
- 4-9. Spreader mechanism 42
- <-01> 44
- <-02> 45
- 5. DISASSEMBLY 47
- 5-3. Feed mechanism 50
- 5-3-2. X feed unit 51
- 5-3-3. Y feed unit 51
- 5-5. Spreader mechanism 53
- 5-6. Looper mechanism 54
- 5-8. Looper base mechanism 56
- 5-9. Needle bar mechanism 57
- 5-10. Lubrication 58
- 5-12. Upper shaft mechanism 61
- 5-13. Cutter mechanism 62
- 6. ASSEMBLY 63
- 6-1. Cutter mechanism 64
- B Assemble as shown in the 65
- D Insert the cutter arm pin 65
- 6-3. Zigzag mechanism 68
- Insert into the groove 69
- C Assemble as shown in the 79
- D Place the pulse motor Y 79
- E Belt tension adjustment 80
- (Viewed from the left) 84
- (Viewed from the front) 84
- Measurement 91
- 6-10. Lower shaft mechanism 94
- Should be no clearance 98
- 6-11. Looper mechanism 99
- (Clearance) 100
- (Viewed from underneath) 100
- 6-12. Spreader mechanism 101
- (When at 103
- Clearance： 103
- 6-14. Threading mechanism 104
- 6-15-1. Feed base 106
- (When at maximum retraction) 111
- 6-15-2. X feed shaft holder 113
- (Viewed from directly to 114
- (Viewed from the side) 114
- Base of 114
- 6-16. X feed mechanism 116
- A Assemble as shown in the 117
- Measurement position 121
- 6-19. Covers 124
- <-01 specifications> 130
- A Spring hook installation 132
- <-02 specifications> 134
- F Spring hook installation 135
- (When cylinder is at 137
- 6-23. Routing the harnesses 138
- 6-24. Routing the air tubes 140
- E Inserting the wicks 146
- Maintain a 147
- 7. ADJUSTMENTS 150
- Looper height 151
- 0487B 0488B 155
- Moves to left 156
- Moves to right 156
- 0.01 - 0.08mm 158
- CAUTION 166
- (When using a 173
- 2-pedal foot switch) 173
- 0.3 mm 181
- 184
- Needle plate 186
- value will not be changed 198
- 6. Press the TEST key (6) 200
- 8. ELECTRICAL MECHANISM 206
- 1199B 0692B 207
- 8-3. Description of fuses 208
- 8-4-1. Connector positions 209
- 8-5. Troubleshooting 215
- 8-5-2. Diagnosis flowchart 216
- 8-5-3. Remedy 219
- 9. ERROR CODES 228
- 10. TROUBLESHOOTING 234
- SERVICE MANUAL 236
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