Weekly Preventive Maintenance Checks and Services Chart

40. Weekly Preventive Maintenance Checks and Servicer

Chart

Sequence

NO.

Projector interior.

Caution: Be careful not to scratch or

crack mirrors or lenses.

a. Open rear and lamp house doors (par.

11c; figs. 7 and 7.1). Remove and clean

(par. 41) projection lamp. Clean re-

flector surface (fig. 28) and rear sur-

face of condenser lens (fig. 29), except

on PH-637C/PFP. Replace projection

lamp, and close rear and lamp house

doors.

b. Open door on left side of projector (fig.

2), except on PH-637C/PFP. Raise

projection stage on PH-637C/PFP (fig.

32.2). Clean rear surface mirror (fig.

24), front surface of condenser lens,

and bottom of Fresnel condenser lens

(par. 41). Close door, or lower projec-

tion stage.

41. Cleaning.

Inspect the metal surfaces of the projector. The metal surfaces

should be free from dust, dirt, grease, and fungus.

a. Remove dust and loose dirt with a clean, soft cloth.

Warning: Cleaning compound is flammable and its fumes are

toxic. Provide adequate ventilation. Do not use near a flame.

b. Remove grease, fungus, and ground-in dirt from the case;

use a cloth dampened (not wet) with cleaning compound.

Caution: Be careful not to scratch or crack the mirrors and

lenses during cleaning.

c. Wipe the projection head window and projection stage plate-

glass cover with a clean, damp cloth.

d. Wipe fingerprints from the projection lens, reflector, con-

denser lens, rear surface mirror, and Fresnel condenser lens with

a lens tissue dampened with lens cleaner.

e. Clean the projection lamp with a clean, soft, cloth.

42. Operator`s Troubleshooting

If an abnormal condition is observed during the operator's pre-

ventive maintenance check (par. 39), perform the applicable

TAGO 5909B