Safety Instructions - Barco DP2K SLP Series Service Manual

Safety

1.1 Safety instructions

WARNING: Before removing/replacing any projector components, disconnect the power to the unit
mains terminals.
Safety Instructions
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, including 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 resistor/capacitor networks. Do not operate this instrument or permit it to be operated without
all protective devices correctly installed and functioning. Service people 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 adult 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) After service, all the protective devices such as insulation barriers, shields, covers and earthing
(grounding) connections must be properly installed. Before closing the cabinet cover, thoroughly
inspect the inside of the cabinet to see that no stray parts or tools have been left inside and all electrical
wires and liquid tubing are properly positioned and tied according to the instructions. Before returning
any projector to the customer, the service personnel must be sure it is completely safe to operate
without danger of electric shock.
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
apparatus 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. 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 these transformers are also safety components and must never be
defeated or altercated. All user-accessible conductive parts must be connected to earth ground, or are
kept at SELV (Safety Extra Low Voltage).
5. Observe original lead dress. Always inspect in all areas for pinched, out-of-face, or frayed wiring. Do not
change spacing between components, and between components and the printed-circuit board. Check AC
power cord for damage. 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
6. 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 necessary, take corrective action to remove any potential
safety hazard.
7. PRODUCT SAFETY NOTICE - Many electrical and mechanical parts have special safety-related
characteristics some of which are often not evident from visual inspection, nor can the protection they give
necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Use of a
substitute replacement that does not have the same safety characteristics as the recommended
replacement part in BARCO service data parts list might create shock, fire, and/or other hazards. Product
Safety is under review continuously and new instructions are issued whenever appropriate. For the latest
information, always consult the appropriate current BARCO service literature.
12 R5906848 /04 DP2K SLP Series