Hitachi 27UX01B-501, Руководство по обслуживанию

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PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in HITACHI
television receivers have special safety-related
characteristics. These 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 this Service manual.
Electrical components having such features are identified
with a mark in the schematics and parts list in this
Service Manual.
The use of a substitute replacement component which
does not have the same safety characteristics as the
HITACHI recommended replacement component, shown
in the parts list in this Service Manual, may create shock,
fire, X-radiation, or other hazards.
Production safety is continuously under review and new
instructions are issued from time to time. For the latest
information, always consult the current HITACHI Service
Manual. [A subscription to, or additional copies of
HITACHI Service Manuals may be obtained at a nominal
charge from HITACHI Sales Corporation.]
X-Radiation
TUBE: The primary source of X-Radiation in this receiver
is the picture tube. The tube utilized in this chassis is
specially constructed to limit X-Radiation emissions. For
continued X-Radiation protection, the replacement tube
must be the same type as the original HITACHI-approved
type.
When troubleshooting and making test measurements in a
receiver with excessive high voltage problem, avoid being
unnecessarily close to the picture tube and high voltage
components.
Do not operate the chassis longer than is necessary to
locate the cause of excessive voltage.
This Service Manual is intended for qualified service
technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment
and tools, and have been trained to properly and safely
repair complex products such as those covered by this
manual. Improperly performed repairs can adversely
affect the safety and reliability of the product and may void
warranty. Consumers should not risk trying to do the
necessary repairs and should refer to a qualified service
technician.
WARNING
Lead in solder used in this product is listed by the California
Health and Welfare agency as a known reproductive
toxicant which may cause birth defects or other
reproductive harm (California Health and Safety Code,
Section 25249.5).
When servicing or handling circuit boards and other
components which contain lead in solder, avoid
unprotected skin contact with solder. Also, when soldering
do not inhale any smoke or fumes produced.
SAFETY NOTICE
USE ISOLATION TRANSFORMER
WHEN SERVICING
Components having special safety characteristics
identified by
on the parts list in this service manual and
its supplements and bulletins. Before servicing this
product, it is important that the service technician read and
follow the “Safety Precautions” and the “Product Safety
Notices” in this Service Manual.
For continued X-Radiation protection, replace picture tube
with original type or HITACHI equivalent type.
POWER SOURCE
This television receiver is designed to operate on 120Volt/
60Hz, AC house current. Insert the power cord into a
120Volts/60Hz outlet.
NEVER CONNECT THE TV TO OTHER THAN THE
SPECIFIED VOLTAGE OR TO DIRECT CURRENT.
!
HIGH
IMPEDANCE
H.V. METER
CRT ANODE
+ -
CHASSIS
GROUND
CRT
!