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Brother International S-7200B Service Manual - Page 59

Control circuit board, <Name and function of each part&gt

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10. CONTROL BOX AND MOTOR 10-3. Control circuit board DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury. Connectors CN18 CN12 CN13 CN4 CN5 CN7 CN8 CN1 CN2 CN3 CN15 CN11 CN6 CN9 CN10 CN16 Head detector unit connector Solenoid-type presser lifter connector Sewing machine connector Synchronizer connector Operation panel connector Relay connector Coupler connector Control power supply connector Treadle connector Standing operation connector Puller connector Option connector 1 Option connector 2 Option connector 3 Cooling fan power supply connector Thermistor connector Connect to sewing machine connectors. 0657B Connect to power supply circuit board connectors. Connect to transformer connectors. Connect to treadle unit connector. Connect to plug (sold separately) for standing operation Connect to solenoid for puller or other device. Connect to sewing speed actuator. For input/output signals used by external devices Connect to stitch counter actuator. Only used for three-phase high-voltage specifications. Connect to shorted connector when not using three-phase high-voltage specifications. S-7200B 52

Section	Page
SAFETY INSTRUCTIONS	3
[1] Safety indications and their meanings	3
[2] Notes on safety	4
[3] Warning labels	6
1. MACHINE SPECIFICATIONS	8
2. NOTES ON HANDLING	9
3. FUNCTION SETTINGS (OPERATION PANEL)	10
3-1. Maximum sewing speed and start backtack sewing speed setting methods	10
3-2. Using the LOCK key	11
3-3. Setting the DIP switches	11
3-4. Setting functions	12
3-5. Function List	13
3-6. Clearing saved data (Initialization)	28
4. INITIALIZING THE CONTROL BOX PANEL	29
5. ADJUSTING THE ROTARY HOOK LUBRICATION　AMOUNT (-[]0[], []3[] specifications)	30
6. ADJUSTMENTS	31
6-1. Adjusting the actuator position	31
6-2. Adjusting the safety switch position	32
6-3. Adjusting the thread take-up spring	33
6-4. Adjusting arm thread guide R	34
6-5. Adjusting the presser foot height	34
6-6. Adjusting of the feed dog height	35
6-7. Adjusting the feed dog angle	36
6-8. Adjusting the needle bar height	37
6-9. Adjusting the needle and feed mechanism timing	37
6-10. Adjusting the needle and rotary hook timing	38
6-11. Adjusting the thread trimming timing	39
6-12. Adjusting the thread take-up amount (-[][]3 specifications)	40
6-13. Adjusting the needle up stop position (When using the operation panel)	41
6-14. Setting the needle up stop position and needle down stop position (If using the control box panel)	42
6-15. Adjusting the treadle	44
6-16. Adjusting the presser foot floating amount (minute lifting amount)	44
7. REPLACING PARTS	45
7-1. Fixed knife	45
7-2. Movable knife	45
7-3. Motor and timing belt	46
7-4. Rotary hook RP	49
7-5. Feed bar shaft, Lifting feed shaft	50
8. APPLYING GREASE (-[]3[], []5[] specifications)	51
8-1. When using the operation panel	51
8-2. When using the control box panel	53
9. CONTROL SYSTEM	55
10. CONTROL BOX AND MOTOR	56
10-1. Removing and installing the control box	56
10-2. Control box and motor rating plate	57
10-3. Control circuit board	59
10-4. Checking the motor and power supply	61
10-5. Checking the solenoids	62
11. TREADLE UNIT ASSEMBLY	63
11-1. Types	63
11-2. Standard setting values	64
11-3. Setting method for standard depression strokes	65
12. STANDING OPERATION PEDAL	69
12-1. Installing the foot plug	69
12-2. Connectors	70
13. TROUBLESHOOTING	71
13-1. Sewing	71
13-2. Error code displays	76