TDP-643R PLUS BAR CODE PRINTER
SERVICE MANUAL
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4.4 Stepping Motor Replacement
1. Turn off printer power.
2. Remove power cord and RS-232 and/or parallel port cable.
3. Form the button of the printer, remove the 6 screws.
4. Detach the printer top cover and disconnect peel-off sensor connector from the
cover.
5. Loosen the 4mechanism fixing screws on the mechanism mount.
6. Detach print head mechanism.
7. Remove E-ring and outer gear.
Fig. 4-7 Remove E-ring and outer gear
Outer gear
E-ring