JVC LX-D1010G - Lcd Projector, Руководство по обслуживанию

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LX-D1010G
(PA012) I
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original
design unless authorized in writing by the manufacturer.
Replacement parts must be identical to those used in the original
circuits. Service should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufacturer
of responsibility for personal injury or property damage resulting
therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement
parts which have these special safety characteristics are
identified in the parts list of Service manual.
Electrical
components having such features are identified by shading
on the schematics and by (
) on the parts list in Service
manual. The use of a substitute replacement which does not
have the same safety characteristics as the recommended
replacement part shown in the parts list of Service manual may
cause shock, fire, or other hazards.
4. Use isolation transformer when hot chassis.
The chassis and any sub-chassis contained in some products are
connected to one side of the AC power line. An isolation
transformer of adequate capacity should be inserted between the
product and the AC power supply point while performing any
service on some products when the HOT chassis is exposed.
5.
Don't short between the LIVE side ground and ISOLATED
side ground or EARTH side ground when repairing.
Some model's power circuit is partly different in the GND. The
difference of the GND is shown by the LIVE : (
) side GND, the
ISOLATED: ( ) side GND and EARTH : ( ) side GND. Don't
short between the LIVE side GND and ISOLATED side GND or
EARTH side GND and never measure with a measuring
apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED
side GND or EARTH side GND at the same time.
If above note will not be kept, a fuse or any parts will be broken.
6. When service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in the
high voltage circuit area. Where a short circuit has occurred,
those components that indicate evidence of overheating should be
replaced. Always use the manufacturer's replacement
components.
7. Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control knobs,
metal cabinet, screwheads, earphone jack, control shafts, etc.) to
be sure the product is safe to operate without danger of electrical
shock.
(1)
Dielectric Strength Test
The isolation between the AC primary circuit and all metal parts
exposed to the user, particularly any exposed metal part having a
return path to the chassis should withstand a voltage of 1500V
AC (r.m.s.) or 2200V DC for a period of one second.
This method of test requires a test equipment not generally found
in the service trade.
This mark shows a fast
operating fuse, the
letters indicated below
show the rating.
A V