Correction
Symptom
Probable trouble
Repair or replace power
Lamp will not light and
Defective power cable_ _ _ _
cable.
blower motor will not
operate.
Tighten leads.
Switch leads not securely
connected to projector
receptacle connector.
Locate and repair.
Open or short circuit in
wiring leads.
Replace connector.
Defective receptacle con-
nector.
Replace switch.
Defective switch_ _ _ _ _ _
Replace switch.
Defective switch_ _ _ _ _ _
Projection lamp and
motor continue to op-
erate after switch is
turned to the OFF
position.
Realine optical system as
Optical system improper-
Image cannot be focused
necessary. Replace
ly alined, or optical
sharply.
broken or scratched ele-
elements scratched or
ments.
broken.
Clean optical system thor-
Dirt or dust in optical
Image is not sufficiently
oughly.
system.
bright.
Tighten or repair motor
Motor not satisfactorily
Blower motor causes ex-
mountings.
shock-mounted.
cessive vibration.
Replace motor or fan, as
Defective motor or fan_ _ _
necessary.
Section II. DISASSEMBLY AND REASSEMBLY
55. Projector Housing
a. Shelves.
(1) To remove the front shelf of the PH-637/PFP, first remove
the two screws and washers that hold the shelf to the pencil-
groove section. Then slide the shelf support legs out of the
retaining holes in the front of the projector, and remove the
shelf.
(2) To remove the shelf on the left side of the projector, remove
the four screws (PH-637/PFP) and the three screws (PH-
637A/PFP) that hold the shelf to the projector. To remove
the shelf support, remove the two screws that hold the support
to the housing.
(3) To replace the shelves, reverse the disassembly instructions
given in (1) and (2) above.
b. Projection Stage Plate Glass and Fresnel Condenser Lens (figs.
51
TAGO 4738B