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19. Remove the two screws and the lower thread guide assembly.
20. Remove the screw and the inner rotary hook bracket.
21. Remove the presser bar clamp screw.
22. Remove the presser bar by lifting it from above, and the presser bar clamp.
23. Remove the presser spring screw and the presser bar spring.
24. Remove the presser lifter by pulling the presser lifting shaft straight out from the front.
25. Remove the screw and the thread take-up shaft.
Summary of Contents for BL7800
Page 1: ...4 2001...
Page 4: ...2 1 MECHANICAL CHART...
Page 9: ...7 1 DISASSEMBLING AND REASSEMBLING THE OUTER PARTS AND MAIN PARTS 8 2 LEAD WIRE ARRANGEMENT 19...
Page 15: ...13...
Page 17: ...15...
Page 19: ...17...
Page 21: ...19 2 LEAD WIRE ARRANGEMENT...
Page 43: ...41 Main PC board...
Page 44: ...42 Power supply unit Power 120 Power 230...
Page 45: ...43 Operation board Other PC boards...
Page 46: ...BL7800 T1010141...