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IMPORTANT SERVICE SAFETY NOTES
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Service work should be performed only by qualified service technicians who are
thoroughly familiar with all safety checks and servicina auidelines as follows:
BEFORE RETURNING THE PROJECTOR:
(Fire & Shock Hazard)
Before returning the projector to the user, perform
the following safety checks:
1.
2.
3.
0
0
Inspect
lead wires are not pinched
between
the
chassis and other metal parts of the projector.
Inspect all protective
devices such as non-metallic
control knobs, insulating
materials,
cabinet backs,
adjustment
and compartment
covers
or shields,
isolation
resistor-capacity
networks,
mechanical
insulators, etc.
To be sure that no shock hazard exists, check for
current leakage in the following
manner:
Plug the AC cord directly into a 120.volt AC outlet,
(Do not use an isolation transformer
for this test).
Using two clip leads, connect a 1.5k ohm, 10 watt
resistor paralleled
by a 0.15uF capacitor
in parallel
between all exposed metal cabinet parts and earth
ground.
WARNING
1.
For continued
safety,
no modification
of any circuit
should be attempted.
2. Disconnect AC power before servicing.
Use an AC voltmeter with sensitivity of 5000 ohm per
volt., or higher, sensitivity to measure the AC voltage
drop across the resistor (See Diagram).
All checks
must be repeated
with the AC plug
connection
reversed.
(If necessary,
a non-polarized
adapter plug must be used only for the purpose of
completing these checks.)
Any reading of 0.3 volts RMS (this corresponds
to
0.2 milliamp. AC.) or more is excessive and indicates
a potential
shock hazard which must be corrected
before returning the unit to the owner.
1.5k ohm (IOW)
TEST PROBE
CONNECT TO KNOWN
METAL PARTS
EARTH GROUND
SAFETY NOTICE
Many electrical
and mechanical
parts in LCD Projector
have special safety-related
characteristics.
These characteristics
are often not evident from visual
inspection,
nor can protection
afforded
by them be
necessarily increased by using replacement components
rated for higher voltage, wattage, etc.
Replacement
parts which
have these special
safety
characteristics
are identified
in this manual;
electrical
components
having such features are identified
by "A"
and shaded
areas in the Replacement
Parts Lists and
Schematic
Diagrams.
For continued
protection,
replacement
parts must be identical to those used in the
original circuit. The use of a substitute replacement parts
which do not have the same safety characteristics
as
the factory recommended
replacement
parts shown in
this service manual, may create shock,
fire or other
hazards.
De nombreuses pieces, electriques et mecaniques, dans
AVIS POUR LA SECURITE
les projecteur
a LCD presentent
des caracteristiques
speciales
relatives a la securite,
qui ne sont souvent
pas evidentes a vue.
Le degre de protection ne peut pas etre necessairement
augmentee
en utilisant
des pieces de remplacement
etalonnees
pour haute tension, puissance,
etc.
Les pieces
de remplacement
qui presentent
ces
caracteristiques
sont identifiees
dans ce manuel;
les pieces electriques
qui presentent ces particularites
sont identifiees par la marque "A" et hachurees dans la
liste des pieces de remplacement
et les diagrammes
schematiques.
Pour assurer la protection,
ces pieces
doivent etre identiques a celles utilisees dans le circuit
d'origine.
L'utilisation de pieces qui n'ont pas les memes
caracteristiques
que les pieces
recommandees
par
I'usine, indiquees dans ce manuel, peut provoquer des
electrocutions,
incendies ou autres accidents.
3
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