4.6 Installation of Black Mark Sensor
1. Turn off the printer power.
2. Disconnect RS-232 cable and power cord.
3. Open the front panel.
4. Open the top cover.
5. Detach the lateral cover by unfastening its 5 fixing screws.
6. Loosen the 4 mechanism fixing screws.
7. Disengage the ribbon mechanism, slide mechanism forward for 1 cm, take
out the mechanism.
8. Detach the mechanism ground wire on the mainboard.
9. Disconnect all mechanism connectors from mainboard.
10. Take out the mechanism and stand the mechanism perpendicularly as
shown.
11. Remove two screws and black mark sensor PCB.
12. Replace with the new black mark sensor and connect in wires, fix the
connection wires in the guide slots as shown.
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