Brother RH-981A Service Manual page 7
Electronic eyelet button holer
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Also See for RH-981A:
- Parts manual (109 pages) ,
- Instruction manual (89 pages) ,
- Specifications (8 pages)
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and looper..........................................................56
4-13.Adjusting the needle and looper timing............57
4-14.Adjusting the loop stroke ..................................58
4-15.Adjusting the height of the needle bar .............59
the looper and needle .......................................59
4-17.Adjusting the needle guard...............................60
4-19.Adjusting the spreader timing...........................61
the upper thread and tension release ..............61
4-21.Adjusting upper thread trimming ......................62
knife mounting position..............................62
trimmer lever bracket.................................63
(-01 specification).............................................63
4-22-1.Adjusting the knife pressure......................63
4-22-2.Adjusting the position of the
thread trimmer arm ....................................64
4-22-3.Adjusting the thread clamp assembly
and thread clamp opener...........................65
4-22-4.Adjusting the thread handler .....................66
4-22-5.Adjusting the thread guide plate................67
4-22-6.Adjusting the amount to pull the lower
thread required for thread trimming ..........67
4-22-7.Adjusting the amount to pull the lower
thread for safety stitching...........................68
(-02, -52 specifications).....................................69
4-23-1. Adjusting the knife engagement...............69
4-23-2. Adjusting the knife pressure......................70
4-23-3. Adjusting the gimp pull force .....................70
4-23-4. Adjusting the gimp tension ........................71
4-23-5. Using gimp thread work clamp .................72
4-23-6. Adjusting the auxiliary clamp arm .............73
to be pulled for a safe sewing start...........74
(-02, -52 specifications) .....................................75
of the needle bar and the looper base .............76
4-26.Adjusting the needle bar stop position.............77
5-1. Components inside the control box ................. 78
5-2. Fuse explanation .............................................. 80
5-2-1.Before replacing a fuse ............................... 81
5-3. Connectors........................................................ 82
5-3-1.Connector positions..................................... 82
symptoms due to poor contact ................... 86
5-4. Specification harness connections .................. 97
5-5. Summary of DIP switches................................ 98
5-5-1.Panel DIP switches ..................................... 98
5-5-2. Circuit board DIP switches ......................... 99
THE MEMORY SWITCHES.......................... 101
5-6-1. Memory switch table................................. 102
5-7. Sensors positions and funstions.................... 103
6-1. Solenoid valves and air tubes........................ 107
controllers....................................................107
6-1-2.Air tubes ..................................................... 108
6-2. Air tube layout................................................. 109
7-1. Motion flowchart.............................................. 112
7-2. Input check list ................................................ 113
7-3. Output check list ............................................. 116
7-4. List of error codes........................................... 118
7-5. Troubleshooting.............................................. 121
7-6. Control circuit block diagram (1) .................... 128
7-7. Control circuit block diagram (2) .................... 129
RH-981A
.................. 78
.................. 107
.........................................................112
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