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Sensors and Switches
Drum surface potential sensor and surface potential measurement board
1. Remove the printer top cover (see page 4–4).
2. Remove the developing unit (see page 4–19).
3. Remove the photoreceptor drum (see page 4–34).
4. At the rear side of the printer, disconnect the harness connector (1) from the
surface potential measurement board, as shown in the following figure.
5. Remove the screws (4) securing the surface potential measurement board, as
shown in the following figure.
Replacement Procedures
4–139
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