Elmo ST-1200 - B. PROJECTION LAMP & LENS; Lamp does not light; Dark image; Uneven screen brightness

B. PROJECTION LAMP & LENS
Case
Lamp does not
light
Point
Lamp
(P3-3)
Step
Take out Lamp and check the defective of
Lamp itself.
If so, install new Lamp.
Remark
p-6
Lamp socket
assy
(P3-2)
Switch assy
(P6-i)
Take out Lamp, check the output terminals p-6
of Lamp socket assy whether the voltage
(approx. A.C. 22-23V) would be applied.
If so, raise the output terminals of Lamp
socket assy to be in contact with Lamp.
Check
Micro switch SW9, SWIO whether P-12
would work properly, also of which attach-
ing screw would be loosened.
Check the position of Lamp switch lever 1.
If not, replace or adjust.
Dark image
Transformer
(P7or-18)
Lamp
(P3-3)
Safety shutter
(P7-ll)
Check both terminals of H.L. on Trans-
former terminal whether the voltage would
be applied.
Check whether Lamp would be off the rim
of Lamp holder (2) assy.
To obtain the sufficient brightness, first
loosen attaching screws and move Lamp fix-
ing plate and Lamp holder (2) assy back
and forth until most bright screen can be
achieved.
If Safety shutter could not keep off from
the optical axis of the screen during
Motor switch knob positioned F or R,
adjust the position of Safety shutter.
P-8
p-6
P-IO
Uneven screen
brightness
Lamp
(P3-3)
To obtain leveled brightness, first loosen p-6
attaching screws and move back and forth
until most bright and leveled screen
brightness can be achieved.
Uneven screen
focusing
Projection lens To align the optical axis, first pass the
(P3-8) focusing test film and either tighten or
loosen attaching screw to obtain evenness
in focusing.
-20-
P-7