34
TTP-243 Plus/ 243E Plus/
342 Plus Bar Code Printer
4.3 DC Motor Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel. (Cf. Fig. 3.14)
5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)
6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)
7. Remove the screw on the PCB of peel-off and cutter connector.
8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig. 3.17)
9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)
10. Move the mechanism in the label feed direction about 5 mm.
11. Take out the internal label roll mount and remove connector JP1. (Cf. Fig. 3.19)
12. Remove the screw of ground wire on the mainboard.
13. Remove all connectors on the mainboard.
14. Take out the mechanism.
15. Remove the cable tie.
16. Remove the three screws on DC motor fixture.
Fig. 4.4 DC Motor Fixture
17. Remove the two screws used to fix DC motor on the fixture.
18. Replace the DC motor and pull out the cables in connector No. 6.
Note: The colors of DC motor wires in connector No. 6 are yellow (outside) and green
(inside).
19. Reassemble the removed parts in the reverse order of the removal.
4.4 Ribbon Rewind Spindle Encoder Replacement
The encoder is installed on the gear box of DC motor, and is used to detect if the ribbon
is unerringly rewound by the spindle. The encoder is connected to JP6 on the
mainboard. Please switch the printer to thermal transfer mode. The multi-meter is used
DC Motor
Fixture
