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26. Remove the two screws securing the upper shaft metal, and the upper shaft assembly.
27. Remove the screw and the NP PC board assembly.
28. Remove the screw and the tension pulley holder.
29. Remove the two feed rod tension springs.
30. Remove the metal presser screw and two horizontal feed shaft bracket screw, and then remove the horizontal
feed assembly.
31. Remove the drop guide plate screws, and the drop guide.
32. Remove the two screws and FPM holder assembly.
33. Remove the screw and the outer rotary hook assembly.
34. Remove the two metal presser screws, and remove the lower shaft assembly and timing belt.
35. Remove the connector, the two screws and the power supply unit assembly.
36. Remove the three screws and base plate assembly.
37. Remove the CS retaining ring from the tension releaser plate, then remove the tension releaser plate from the
pin.
Disassembly Points
26. To remove the upper shaft assembly more easily, remove the two feed rod tension springs (A) and the
tension pulley assembly (B) first.
* When removing the upper shaft assembly, do not bend the N.P. or rotary shutters.
30. Before removing the horizontal feed assembly, remove the feed bar tension spring (C).
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...