Fig. 4-14 Lamp Illumination Pattern; Fig. 415 Electromagnetic Field Radiator Mounting - Canon NP-70 Service Manual

4-10
NP•70
1)
ILLUMINATION LAMP
Two lamps are used in this assembly. The output of each illumination lamp is 25W and the
luminous color is green for maximum lamp efficiency. The luminous intensity of these lamps
is very high, using a 90° direct light/270° reflected light pattern (a 90° portion of the glass
contains no fluorescent material). The open part of this lamp (90° ) is positioned so that this
part can illuminate the copyboard glass, as indicated in Fig. 4-14.
Light Reflector
Slit
Fig. 4-14 Lamp Illumination Pattern
Illumination
I Lamp
I
I
I
I
2) ELECTROMAGNETIC FIELD RADIATOR
The electromagnetic field radiator is a plate shaped in a semi-wrap-around fashion to ensure
contact with the lamp surfaces. 240VAC is continuously applied to this radiator to assist in
the excitation of the lamps. As such, the field radiator must be completely insulated from
the copier frame due to its high potential.
Insulation Washer
Screw
i
Electromagnetic
Field Radiator
Base Plate
Insulator
Fig. 4-15 Electromagnetic Field Radiator Mounting
'J
Second Printing,lune, 1974
© CANON INC.