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XV-Z3000

DT-500

IMPORTANT SERVICE SAFETY NOTES (for USA)

Service work should be performed only by qualified service technicians who are
thoroughly familiar with all safety checks and servicing guidelines as follows:

WARNING

1. For continued safety, no modification of any circuit

should be attempted.

2. Disconnect AC power before servicing.

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SAFETY NOTICE

Many electrical and mechanical parts in DMD™
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

DVM

AC SCALE

1.5k ohm

10W

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

0.15 µF

TEST PROBE

components having such features are identified by “

”

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.

CAUTION:

FOR CONTINUED PROTECTION

AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAME TYPE F701 (6.3A, 250V)

Use an AC voltmeter having with 5000 ohm per volt,
or higher, sensitivity or measure the AC voltage drop
across the resistor.

Connect the resistor connection to all exposed metal
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon, etc.) and measure the AC voltage drop
across the resistor.
All checks must be repeated with the AC cord plug
connection reversed. (If necessary, a nonpolarized
adaptor plug must be used only for the purpose of
completing these checks.)
Any reading of 0.75 V peak (this corresponds to 0.5
mA peak AC.) or more is excessive and indicates a
potential shock hazard which must be corrected before
returning the monitor to the owner.

BEFORE RETURNING THE PROJECTOR:
(Fire & Shock Hazard)

Before returning the receiver to the user, perform the
following safety checks:

1. Inspect all lead dress to make certain that leads are

not pinched, and check that hardware is not lodged
between the chassis and other metal parts in the
projector.

2. Inspect all protective devices such as non-metallic

control knobs, insulation materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators, etc.

3. To be sure that no shock hazard exists, check for

leakage current in the following manner.

Plug the AC cord directly into a 120 volt AC outlet. (For
North America)

Plug the AC cord directly into a 110 ~ 240 volt AC outlet,
and connect the DC power cable into the projector's DC
jack. (Do not use an isolasion transformer for this test).
(For Others)

Using two clip leads, connect a 1.5k ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series with
all exposed metal cabinet parts and a known earth
ground, such as electrical conduit or electrical ground
connected to an earth ground.