4. MECHANICAL SYSTEM4-114 COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)15. Removing the Potential SensorUnit1) Remove the counter cover and the hopper leftcover.2) Remove the screw [1], and open the potentialsensor PCB mount [2] to the front.Figure 4-1101-15Figure 4-1102-153) Disconnect the four connectors [3], andremove the four PCB supports [4]; then,remove the potential sensor PCB [5].Figure 4-1103-154) Draw out the transfer belt unit and the processunit, and place paper [6] on the process unit toprotect the photosensitive drum againstscratches.5) Remove the screw [7], and remove thepotential sensor unit [8].Figure 4-1104-15When installing the potential sensorunit [8], tighten the screw while butt-ing it against the front side plate [9].Figure 4-1105-15[1][2]Bk potential sensor PCB M potential sensor PCBC potential sensor PCB Y potential sensor PCB[5][4][3][4][6] [7] [8][9] [8]