3.3 Replacement of Main Board
1. Disconnect printer power.
2. Disconnect RS-232 cable and power cord.
3. Open the front panel.
4. Open the printer top cover.
5. Unfasten the two screws located at the lower edge of the lateral cover, the
three screws fastening the lateral cover from inside the printer. Detach the
lateral cover from the printer.
6. Disconnect all connectors on the mainboard.
7. Unfasten the ground wire fixing screw, detach the ground wire.
8. Unfasten the 4 mainboard fixing screw.
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