Brother BAS-342G Service Manual page 9

6-12. Thread trimmer mechanism (2)........................80
6-13. Work clamp arm mechanism............................81
6-13-1. Adjusting the lift of the work clamp arm
assembly............................................... 82
6-14. Thread wiper mechanism .................................83
6-15. Covers ................................................................84
7. ADJUSTMENT.......................................
7-1. Checking the safety switch..................................85
7-2. Standard thread tension......................................86
7-2-1. Upper and lower thread tension............ 86
7-2-2. Thread take-up spring............................ 87
7-2-3. Arm thread guide R ................................ 87
7-3. Adjusting the needle bar height ..........................88
7-4. Adjusting the needle bar lift amount ...................88
7-5. Adjusting the driver ..............................................88
7-6. Adjusting the needle clearance...........................89
7-7. Adjusting the shuttle race thread guide..............89
7-8. Adjusting the rotary hook lubrication amount.....90
7-9. Adjusting the position of the movable knife........91
7-10. Replacing the movable and fixed knives .........93
7-10-1. Installing the feed plate ........................ 94
7-11. Adjusting the thread wiper.................................94
7-12. Presser foot installation position .......................95
7-13. Changing the intermittent stroke.......................95
7-14. Adjusting the work clamp lift amount................97
7-15. Adjusting the air pressure .................................97
7-16. Adjusting the thread trimmer cam position ......98
7-17. Belt tension adjustment.....................................98
7-18. Adjusting the tension release amount............100
7-19. Adjusting the lower shaft gear backlash......... 101
7-20. Adjusting the home position............................ 103
7-20-1. Presser foot lift home position ............ 103
7-20-2. X-Y feed home position ...................... 104
7-21. Adjusting the needle up stop home position..106
7-22. Adjusting the needle up stop position.............107
8. ELECTRICAL MECHANISM................
8-1. Precautions while carrying out
adjustments......................................................109
8-2. Inside the control box and operation
panel structure .................................................110
8-3. Description of fuses .............................................111
85
8-4. Description of connectors....................................112
8-4-1. Connector positions ................................112
8-4-2. Symptoms when there are poor
8-5. Troubleshooting ...................................................119
8-5-1. Troubleshooting procedure.....................119
8-5-2. Diagnosis flowchart.................................120
8-5-3. Remedy ...................................................124
9. TABLE OF ERROR CODES................
10. TROUBLESHOOTING .......................
11. 7-SEGMENT DISPLAY ......................
BAS-342G
connections .............................................115
109
135
139
142