Fig. 4-34 Corona Wire Adjustment (Positive Corona Assembly Illustrated) - Canon NP-70 Service Manual

NP -70
4-29
4.5-4 REPAIR/SERVICING ACTIONS
1) CORONA WIRE ADJUSTMENT
The distance of the corona wires from the body of the corona assemblies is adjustable in all
cases by two (2) screws, as depicted in Fig. 4-34. The distance, represented by G in Fig.4-34,
vary in the case of each assembly (see Table 4-1 for specifications).
Around the head of each screw are indication marks, which aid in making adjustments. Each
mark represents 0.1 mm vertical movement of the wire, either up or down.
Turning the adjust screws counterclockwise increases the surface potential of the drum due to
the corona wire moving closer to the drum. On the other hand, when turned clockwise, the
surface potential is decreased.
NOTE:
When making any adjustment, always note the position of the screw. Turn the screw
slowly, increasing in. small increments.
Rear Cover
Rear Wire Guide
Corona Wire
Front Wire Guide
Front Cover
Indication Marks
Adjust Screw
Fig. 4-34 Corona Wire Adjustment
(Positive Corona Assembly illustrated)
© CANON INC.
Second Printing,lune, 1974