Safety Precaution; Product Safety Notice; Ultraviolet Danger In Service Mode - Toshiba TLP-T50M Service Manual

SAFETY PRECAUTION

WARNING: Service should not be attempted by anyone unfamiliar with the necessary precautions on this
projector. The following are the necessary precautions to be observed before servicing this chassis.
1. An isolation Transformer should be connected in the power line between the projector and the AC Iine
before any service is performed on the projector.
2. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in
place, such as; non-metallic control knobs, insulating covers, shields, isolation resistor-capacitor network
etc.
3. Before returning the set to the customer, always perform an AC Ieakage current check on the exposed
metallic parts of the cabinet, such as terminals, screwheads, metal overlays, control shafts etc. to be
sure the set is safe to operate without danger of electrical shock. Plug the AC Iine cord directly into an AC
outlet (do not use a line isolation transformer during this check). Use an AC voltmeter having 5000 ohm
per volt or more sensitivity in the following manner: Connect a1500 ohm 10W resistor, in parallel with a
0.15 uF, AC type capacitor, between a known good
earth ground (water pipe, conduit, etc.) and the
exposed metallic parts, one at a time. Measure
the AC voltage across the combination of 1500
ohm resistor and 0.15 uF capacitor. Reverse the
AC plug at the AC outlet and repeat AC voltage
measurements for each exposed metallic part.
Voltage measured must not exceed 5.25V(rms).
This corresponds to 3.5 mA(AC). Any value
exceeding this limit constitutes a potential shock
hazard and must be corrected immediately.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
characteristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot
necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.
Replacement parts which have these special safety characteristics are identified in this manual and its
supplements; electrical components having such features are identified by the international hazard symbols
on the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of substitute
replacement parts which do not have the same safety characteristics as specified in the parts list may create
shock, fire or other hazards.

ULTRAVIOLET DANGER IN SERVICE MODE

Eye damage may result from directly viewing the light produced by the lamp used in this product. Always turn
off lamp before opening this cover. Ultraviolet radiation eye protection required during servicing.
Good earth ground
such as a water
pipe, conduit, etc.
0-2
AC VOLTMETER
0.15 uF
Place this probe on
each exposed
metallic part.
1500 ohm
10W