44
Replacing the Circuit Board
Disassembly
1.
Unplug the unit.
2.
Remove the reel support and the enclosure.
3.
Loosen but don’t remove the thumb screw on the Rear Door, rotate the Rear Door
by 180 degrees and hang it on the thumb screw.
4.
Disconnect the connectors.
5.
Remove the three screws holding the circuit board.
6.
Remove the circuit board assembly (the upper layer is MCU controller while the
lower layer is Motor Driver).
Assembly
1.
Position the circuit board so the four holes in the board align with the screw
holes in the frame.
2.
Insert and tighten the screws.
3.
Connect the connectors.
4.
Replace the Rear Door, Enclosure and Reel Support.
Circuit board
Rear Door
Summary of Contents for ST9500
Page 17: ...17 5 Panel Operation Flow Chart...
Page 58: ...58 Whole Machine Exploded Illustration...
Page 60: ...60 Base Assembly and Body Assembly Exploded Illustration...
Page 62: ...62 Motor Assembly Exploded Illustration...
Page 65: ...65 Head Subassembly and Knife Lever Assembly Exploded Illustration...
Page 67: ...67 Base Knife Assembly Exploded Illustration...
Page 69: ...69 Left and Right Needle Holder Assembly Exploded Illustration...
Page 71: ...71 Guide Bar Assy Feed Assy and Feed Lever Assy Exploded Illustration...
Page 74: ...74 Switch Power Supply Assy and Driver Assy Exploded Illustration...