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Brother BAS-311G service manual Disassembly, Covers

Models: BAS-311G

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5. DISASSEMBLY

5. DISASSEMBLY

5. DISASSEMBLY

CAUTION

Disassembly should only be carried out by a qualified technician.

Turn off the power switch before carrying out disassembly. If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin. If the oil and grease get into your eyes or onto your skin, inflammation can result.

Furthermore, do not drink or eat the lubricating oil or grease. They may cause diarrhea or vomiting.

Keep the oil out of the reach of children.

Use only the proper replacement parts as specified by Brother.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

Any problems in machine operation which result from unauthorized modifications to the machine will not be covered by the warranty.

Disassemble each part in order of the numbers.

5-1. Covers

1.	Top cover	5.	Eye guard
2.	Motor cover	6.	Face plate	5051Q
3.	Motor cover R	7.	Shuttle race cover assy	5051Q
4.	Motor cover L

42	BAS-311G, BAS-326G

Image 49

Brother BAS-311G service manual Disassembly, Covers

Contents

Please read this manual before making any adjustments SERVICE MANUALBAS-311G BAS-326G PROGRAMMABLE ELECTRONIC PATTERN SEWER1 Safety indications and their meanings SAFETY INSTRUCTIONSSymbols Indications2 Notes on safety InstallationDANGER Environmental requirementsMaintenance and inspection CleaningSewing If an error occurs in machine operation, or if abnormalMotor cover 3 Warning labelsTension release solenoid coverSPECIFICATIONS CONTENTSFUNCTION SETTINGS DISASSEMBLY7. ADJUSTMENT 6. ASSEMBLY9. TABLE OF ERROR CODES 10. TROUBLESHOOTING1. SPECIFICATIONS 1. SPECIFICATIONS2-1. List of special functions when power is turned on 2. FUNCTION SETTINGS2. FUNCTION SETTINGS 2. FUNCTION SETTINGS 2-2. List of advanced functionsWhen SPEED indicator is illuminated 4550Q2. FUNCTION SETTINGS 2-3. Memory switch setting method Advancedmemory switches that have been changed from default settings2. FUNCTION SETTINGS 2-4. List of memory switch settingsInitial value rangeWork clamp settings 2. FUNCTION SETTINGSFor solenoid specifications 1 pedal For pneumatic specifications 2 pedalThread winding 2. FUNCTION SETTINGSSewing machine motor settings 2. FUNCTION SETTINGSFeed settings 2. FUNCTION SETTINGSOperation panel settings 2. FUNCTION SETTINGSUser program settings Data editing settings 2. FUNCTION SETTINGSDevice settings 2. FUNCTION SETTINGS Error processing settings 2. FUNCTION SETTINGSMaintenance settings Specifications and destination settings2. FUNCTION SETTINGS 2-5. Setting the work clamp modeUnique machine settings Solenoid specifications, single pedal standard operations2. FUNCTION SETTINGS 2-6. Stitch counter checking methodPneumatic specifications, 2 pedal standard operations Pneumatic specifications, 2 pedal sequence operation2. FUNCTION SETTINGS 2-7. Error history checking methodE − − − 2. FUNCTION SETTINGS 2-8. Input checking methodInput check list Name− − − − 2. FUNCTION SETTINGS2. FUNCTION SETTINGS 2. FUNCTION SETTINGS 2-9. Output checking method4567Q 4441Q 4953Q2. FUNCTION SETTINGS 2. FUNCTION SETTINGS 2-10. Software version checking methodPanel CPU Programmer3-1. Handling data 3. READING / WRITING DATASewing machine internal memory 3. READING / WRITING DATA3-3. Structure of a CF card folder 3-2. Notes on handling CF cards sold separately3. READING / WRITING DATA Turn on the power switch 3-4. Data read/write modeSwitch to data read/write mode 3. READING / WRITING DATAWhen memory switch No. 755 is ON 3-5. Reading sewing data from CF cards3. READING / WRITING DATA End data read/write mode3-6. Writing sewing data to CF cards When memory switch No. 755 is ON3. READING / WRITING DATA Select the w 2 data read/write mode3-8. Writing memory switch data to CF cards 3-7. Reading memory switch data from CF cards3. READING / WRITING DATA End data read/write mode3-10. Writing user program data to CF cards 3-9. Reading user program data from CF cards3. READING / WRITING DATA End data read/write modeRestoring the control program if an error occurs during updating 3-11. Updating the control program3. READING / WRITING DATA 3-13. Reading sewing data from floppy disks 3-12. Writing error log data to CF card3. READING / WRITING DATA End data read/write mode3. READING / WRITING DATA 3-14. Writing sewing data to floppy disks5 End data read/write mode 1 Insert the floppy disk into the floppy disk drive3. READING / WRITING DATA 3-15. Reading extended option output data from a CF card5 End data read/write mode 3-17. Reading extended option output data from floppy disks 3-16. Writing extended option output data to CF cards3. READING / WRITING DATA 3 End data read/write mode4-1. Needle bar and thread take-up mechanisms 4. MECHANICAL DESCRIPTIONS4-2. Lower shaft and shuttle race mechanisms 4. MECHANICAL DESCRIPTIONS4. MECHANICAL DESCRIPTIONS 4-3. Work clamp lifter mechanism Solenoid specifications4-5. Intermittent presser foot lifter mechanism 4-4. Work clamp lifter mechanism Pneumatic specifications4. MECHANICAL DESCRIPTIONS 5045Q4. Stepping clamp connecting rod 5. Stepping clamp arm R 4-6. Intermittent presser foot stroke mechanism4. MECHANICAL DESCRIPTIONS 1. Motor assy 2. Upper shaft 3. Stepping clamp camX direction 4-7. Feed mechanismY direction 4. MECHANICAL DESCRIPTIONS11. Movable knife lever 12. Movable knife connecting plate 4-8. Thread trimmer mechanism4. MECHANICAL DESCRIPTIONS 1. Thread trimmer solenoid 2. Solenoid lever 3. Pushing lever4-10. Thread wiper mechanism 4-9. Tension release mechanism4. MECHANICAL DESCRIPTIONS BAS-311G, BAS-326G5-1. Covers 5. DISASSEMBLY5. DISASSEMBLY 5. DISASSEMBLY 5-2. Thread wiper mechanism2. STOP switch harness Pull out 3. Bolt 4. Plain washer 1. Thread wiper solenoid harness Pull out5-3. Work clamp arm mechanism Pneumatic specifications5. DISASSEMBLY BAS-311G, BAS-326G5. DISASSEMBLY 5-4. Intermittent presser foot lifter mechanismPresser bar Pull downward from presser bar clamp 5. DISASSEMBLY 5-5. Needle bar mechanism5092Q 5093Q5. DISASSEMBLY 5-6. Upper shaft mechanism5094Q 5. DISASSEMBLY 5-7. Lower shaft mechanism5. DISASSEMBLY 5-8. Feed coversBAS-311G, BAS-326G 5101Q5. DISASSEMBLY 5-9. Feed mechanism26. Bolts with washer 3 pcs 27. X-feed motor assy 5. DISASSEMBLY44. Bolts 10 pcs 45. Flat screws 8 pcs 46. Feed bracket 5. DISASSEMBLY47. Bolts 16 pcs 48. X-LM guide 2 pcs 49. Bolts 2 pcs 50. X-belt holder 51. X-belt holder plate 52. Bolts 2 pcs5. DISASSEMBLY 5-10. Work clamp lifter mechanism Solenoid specifications5108Q 5. DISASSEMBLY 5-11. Work clamp lifter mechanism Pneumatic specifications5-13. Intermittent presser foot lifter mechanism 5-12. Tension release mechanism5. DISASSEMBLY Solenoid setting plate5. DISASSEMBLY 5-14. Thread trimmer mechanismThread trimmer collar 5. DISASSEMBLY 5-15. Shuttle hook mechanism6-1. Thread trimmer mechanism 6. ASSEMBLY6. ASSEMBLY Apply grease 6. ASSEMBLYBolts with washer 2 pcs 4853Q6-3. Tension release mechanism 6-2. Intermittent presser foot lifter mechanism6. ASSEMBLY Stepping clamp lifter rod adjustment6. ASSEMBLY 6-4. Work clamp lifter mechanism Solenoid specificationsIndex mark Work clamp lifter plate assy 6. ASSEMBLYAlign 5162QHook the spring into the arm hole as shown in the illustration 6. ASSEMBLY6. ASSEMBLY 6-5. Work clamp lifter mechanism Pneumatic specifications5168Q 5169Q5170Q 6. ASSEMBLY5171Q 5172Q6. ASSEMBLY 6-6. Feed mechanismFlat screws 8 pcs 6. ASSEMBLY5176Q 5215Q5178Q 6. ASSEMBLY5179Q Install so that the backlash is 0.01 6. ASSEMBLYInstall so that the backlash is 0.01 53. X-feed motor assy 54. Bolts with washer 3 pcs Temporarily tightenX-GT belt tension adjustment 6. ASSEMBLYMeasurement position 5184Q 6. ASSEMBLY Y-GT belt tension adjustmentInside X-LM guide installation 6. ASSEMBLYRight Y-LM guide installation 5185Q6. ASSEMBLY 6-7. Feed coversNeedle plate 6. ASSEMBLYBAS-311G, BAS-326G 5191Q6. ASSEMBLY 6-8. Upper shaft mechanismInstall the motor assembly so that the harness is facing downward 6. ASSEMBLY6. ASSEMBLY 6-9. Needle bar mechanismInside hole 18. Needle bar clamp 19. Needle bar Insert from above 20. Screw 6. ASSEMBLY6. ASSEMBLY 6-10. Intermittent presser foot lifter mechanism3. Lower the needle bar approximately 6.5 mm from its highest position 6. ASSEMBLY6. ASSEMBLY 6-11. Lower shaft mechanismCheck that the machine pulley turns smoothly 12. Lower shaft assy 6. ASSEMBLY6-13. Thread trimmer mechanism 6-12. Shuttle hook mechanism6. ASSEMBLY connecting platePneumatic specifications 6-14. Work clamp arm mechanism6. ASSEMBLY 1. Feed plate 2. Bolts with washer 2pcs 3. Work clamp assy6. ASSEMBLY 6-14-1. Adjustments after work clamp arm installationRetainer adjustment Work clamp height adjustment Solenoid specifications6. ASSEMBLY 6-15. Thread wiper mechanism6. ASSEMBLY 6-16. Covers5154Q 7-1. Checking the machine head switch 7. ADJUSTMENT7. ADJUSTMENT 7-2-1. Upper and lower thread tension 7-2. Standard thread tension7. ADJUSTMENT 7-2-3. Arm thread guide R 7-2-2. Thread take-up spring7. ADJUSTMENT Thread take-up spring height7-4. Adjusting the needle bar lift amount 7-3. Adjusting the needle bar height7-5. Adjusting the driver needle guard 7. ADJUSTMENT7-7. Adjusting the shuttle race thread guide 7-6. Adjusting the needle clearance7-8. Rotary hook lubrication amount 7. ADJUSTMENT7. ADJUSTMENT 7-9. Adjusting the position of the movable knife7. Turn the pulley 1 by hand to move the needle bar to its lowest position 7. ADJUSTMENT7. ADJUSTMENT 7-10. Replacing the movable and fixed knives7. ADJUSTMENT 7-10-1. Installing the feed plateEnd feed plate installation mode All indicators switch off7-12. Presser foot installation position 7-11. Adjusting the thread wiper7. ADJUSTMENT 7. ADJUSTMENT 7-13. Changing the intermittent strokeChanging the installation position of stepping clamp link A 7. ADJUSTMENT Stepping clamp connecting rod position adjustment 7-15. Adjusting the air pressure pneumatic specifications 7-14. Adjusting the work clamp lift amount7. ADJUSTMENT Solenoid specifications7-17. Belt tension adjustment 7-16. Adjusting the thread trimmer cam position7. ADJUSTMENT X-GT belt7. ADJUSTMENT Y-GT belt 7-18. Adjusting the tension release amount7. ADJUSTMENT 7-19. Adjusting the backlash of the lower shaft gear7-20-1. Work clamp lift home position 7-20. Adjusting the home position7. ADJUSTMENT Solenoid specifications7. ADJUSTMENT 7-20-2. X-Y feed home positionRepeat steps 4 and 5 to adjust the home position End adjustment modeRepeat steps 5 and 6 to adjust the home position 7. ADJUSTMENTEnd adjustment mode 5208Q 5276Q7. ADJUSTMENT 7-21. Adjusting the needle up stop home position5209Q 4700Q7. ADJUSTMENT 7-22. Adjusting the needle up stop positionAdjustment method End adjustment mode 7. ADJUSTMENT8. ELECTRICAL MECHANISM 8-1. Precautions while carrying out adjustmentsDANGER 8. ELECTRICAL MECHANISMPower supply motor P.C. board 8-2. Inside the control box and operation panel structure8. ELECTRICAL MECHANISM Main P.C. board8. ELECTRICAL MECHANISM 8-3. Description of fuses4590Q 8-4-1. Connector positions 8-4. Description of connectors8. ELECTRICAL MECHANISM Main P.C. board8. ELECTRICAL MECHANISM PMD P.C. board Power supply motor P.C. boardBAS-311G, BAS-326G 4592QBAS-311G, BAS-326G 8. ELECTRICAL MECHANISM Panel P.C. board4594Q 8. ELECTRICAL MECHANISM 8-4-2. Symptoms when there are poor connectionsFeed mechanism Work clamp mechanismThread trimming mechanism 8. ELECTRICAL MECHANISMSewing operations 4713Q 5243Q 4714QOther 8. ELECTRICAL MECHANISM5245Q 5246Q 5247Q 5248Q 5249Q 8-5-1. Diagnosis flowchart 8-5. TroubleshootingDescription of symbols “Problem” symbol in the “8-5-2. Remedy” listsBAS-311G, BAS-326G 8. ELECTRICAL MECHANISM5251Q BAS-311G, BAS-326G 8. ELECTRICAL MECHANISM5252Q BAS-311G, BAS-326G 8. ELECTRICAL MECHANISM5253Q Before carrying out adjustment 8-5-2. RemedyDANGER 8. ELECTRICAL MECHANISM4876Q 8. ELECTRICAL MECHANISM4877Q 4878Q8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 5086Q 8. ELECTRICAL MECHANISM5087Q 4885Q 8. ELECTRICAL MECHANISM4886Q 8. ELECTRICAL MECHANISM4884Q Work clamp does not rise 8. ELECTRICAL MECHANISM4888Q 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 8. ELECTRICAL MECHANISM 4889Q 8. ELECTRICAL MECHANISM4890Q 4891Q5088Q 8. ELECTRICAL MECHANISM5089Q 4892Q9. TABLE OF ERROR CODES 9. TABLE OF ERROR CODESSwitch-related errors DANGERFeed mechanism-related errors 9. TABLE OF ERROR CODES Upper shaft motor-related errorsWork clamp-related errors E110Communication and memory-related errors 9. TABLE OF ERROR CODESE401 E402Device-related errors 9. TABLE OF ERROR CODES Data editing-related errorsP.C. board-related errors E50010. TROUBLESHOOTING 10. TROUBLESHOOTINGProblem CauseProblem 10. TROUBLESHOOTINGCause RemedyProblem 10. TROUBLESHOOTINGpower is turned on and switch11. 7-SEGMENT DISPLAY 11. 7-SEGMENT DISPLAYBAS-311G, BAS-326G Printed in Japan SERVICE MANUALI5060885B 2005.07. B