Barco GRAPHICS 1209S, Service Manual

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SAFETY
2
GRAPHICS
1209S
Date : 10/02/1998
Safety notice
SAFETY PRECAUTIONS
1. Before returning an instrument to the customer , always
make a safety check of the entire instrument, including, but not
limited to, the following items :
a. Be sure that no built-in protective devices are defective and/or
have been defeated during servicing. (1) Protective shields are
provided on this chassis to protect both the technician and the
customer. Correctly replace all missing protective shields, includ-
ing any removed for servicing convenience. (2) When reinstalling
the chassis and/or other assembly in the cabinet, be sure to put
back in place all protective devices, including, but not limited to,
insulating materials, barriers, covers/shields, and isolation resis-
tor/capacitor networks. Do not operate this instrument or
permit it to be operated without all protective devices
correctly installed and functioning. Servicers who defeat
safety features or fail to perform safety checks may be
liable for any resulting damage.
b. Be sure that there are no cabinet openings through which an
andult or child might be able to insert their fingers and contact a
hazardous voltage. Such openings include, but are not limited to,
(1) excessively wide cabinet ventilation slots, and (2) an improperly
fitted and/or incorrectly secured cover panels.
c. Leakage Current Hot Check - With the instrument completely
reassembled, plug the AC line cord directly into a 220 V AC outlet.
(Do not use an isolation transformer during this test.) Use a leakage
current tester or a metering system that complies with American
National Standards Institute (ANSI) C101.0 Leakage Current for
Appliances and Underwriters Laboratories (UL) 1410, (50.7). With
the instrument AC switch first in the on position and then in the off
position, measure from a known earth ground (metal waterpipe,
conduit, etc.) to all exposed metal parts of the instrument (antennas,
handle bracket, metal cabinet, screwheads, metallic overlays,
control shafts, etc.). especially any exposed metal parts that offer
an electrical return path to the chassis. Any current measured must
not exceed 1.5 milliapp. Reverse the instrument power cord plug
in the outlet and repeat test.
ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED
HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST
BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE
CUSTOMER OR BEFORE CONNECTING ACCESSORIES.
d. X-Radiation and High Voltage - Because the picture tubes are the
primary potential source of X-radiation in solid-state projectors,
they are specially constructed to prohibit X-radiation emissions. For
continued X-radiation protection, the replacement picture tube must
be the same type as the original. Also, because the picture tube
shields and mounting hardware perform an X-radiation protection
function, they must be correctly in place.
After replacement of any X-ray radiation related safety compo-
nents (marked in this manual with an *), the EHT voltage board must
be checked.
2. Read and comply with all caution and safety-related notes on or
inside the projector cabinet or on the projector chassis, or on the
picture tube.
3. Design Alteration Warning - Do not alter or add to the mechanical
or electrical design of this apparatus. Design alterations and
additions, including, but not limited to, circuit modifications and the
addition of items such as auxiliary audio and/or video output
connections, might alter the safety characteristics of this appara-
tus and create a hazard to the user. Any design alterations or
additions may void the manufacturer's warranty and may make you,
the servicer responsible for personal injury or property damage
resulting therefrom.
4. Picture Tube Implosion Protection Warning - The picture tube
in this projector encloses a high vacuum. Do not remove, install, or
otherwise handle the picture tube in any manner without first putting
on shatterproof goggles equipped with side shieds. People not so
equipped must be kept safely away while picture tubes are
handled. Keep the picture tube away from your body. Do not handle
the picture tube by its neck.
For continued implosion protection, replace the picture tube only
with one of the same type number.
5. Hot Chassis Warning - This projector chassis has two ground
systems: the primary ground system is formed by the negative
voltage of the rectified mains (power) and is only used as a
reference in primary circuits; the secondary ground system is
connected to earth ground via the earth conductor in the mains
(power) lead.
Separation between primary and secondary circuits is performed
by the safety isolation transformers. Components bridging this
transformers are also safety components and must never be
defeated or alterated.
All user-accessible conductive parts must be connected to earth
ground, or are kept at SELV (Safety Extra Low Voltage).
6. Observe original lead dress. Take extra care to assure correct lead
dress in the following areas:
a. near sharp edges,
b. near thermally hot parts - be sure that leads and components
do not touch thermally hot parts,
c. the AC supply,
d. high voltage.
Always inspect in all areas for pinched, out-of-face, or frayed
wiring. Do not change spacing between components, and be-
tween components and the printed-circuit board. Check AC power
cord for damage.
7. Components, parts, and/or wiring that appear to have overheated
or are otherwise damaged should be replaced with components,
parts, or wiring that meet original specifications. Additionally,
determine the cause of overheating and/or damage and, if neces-
sary, take corrective action to remove any potential safety hazard.
WARNING: RISK OF ELECTRIC SHOCK DURING THIS TEST.
THE PROJECTOR IS NOT CONNECTED TO GROUND.
DO NOT TOUCH THE PROJECTOR AND USE WELL INSULATED
TEST PROBES.