Brother RH-9820 Service Manual Page 207
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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8. ELECTRICAL MECHANISM
198
RH-9820
8-2. Inside the control box and operation panel structure
Main P.C. board
Secured to the side. This is the P.C. board that controls sewing machine operation.
PMD P.C. board
Secured to the base plate. This P.C. board drives the pulse motors and solenoids.
Power supply motor P.C. board
Secured to the rear. This P.C. board generates the voltages that are required for control, and drives the upper shaft motor.
There are 8 fuses on this P.C. board.
Filters (3 places)
The filters at the air intake slots in the cover and control box (2 places) should be cleaned about once a month.
Conversion transformer (Two types are used depending on the power supply voltage specifications.)
This breaks down the power supply voltage into the voltages that are required for control operations.
NF P.C. board
This eliminates the electrical interference that is generated by the power supply line.
Panel P.C. board
Secured to the inside of the operation panel. This P.C. board is used for displaying the sewing machine status and for input
operations.
Control box
Operation panel
Filter
NF P.C. board
Conversion
transformer
PMD P.C. board
1199B 0692B
Panel P.C. board
Power supply
motor P.C. board
Main P.C. board
Filter
- 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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