Hitachi 42HDT51M, Руководство по обслуживанию

Страница: 3 / 131

3
PT5-G/PW1-H
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
1 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.
Product 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.
AVC75 - Audio Video Control Unit
1. Follow the general caution recommendations from “Safety
precautions” section.
42HDT51M - Plasma Monitor Unit
55HDT51M - Plasma Monitor Unit
1. Follow the general caution recommendations from “Safety
precautions” section.
2. Since the Panel module and front filter are made of glass,
sufficient care shall be taken when handling the broken
module and filter in order to avoid injury.
3. If necessary to replace Panel module, this work must be
started after the panel module and the AC/DC Power supply
becomes sufficiently cool.
4. Special care must be taken with the display area to avoid
damaging its surface.
5. The Panel Module shall not be touched with bare hands to
protect its surface from stains.
6. It is recommended to use clean soft gloves during the
replacing work of the Panel module in order to protect, not
only the display area of the panel module but also the
serviceman.
7. The Chip Tube of the panel module (located upper left of the
back of the panel module) and flexible cables connecting
Panel glasses to the drive circuitry Printed Wiring Boards
(P.W.B.) are very weak, so sufficient care must be taken to
prevent breaking or cutting any of these. If the Chip Tube
breaks the panel module will never work, replacement for a
new plasma panel module will be needed.
8. Signal, power supply P.W.B.’s and PDP driving circuits
P.W.B.’s are assembled on the rear side of the PDP module,
take special care with this fragile circuitry; particularly, Flexible
Printed Circuits bonded to surrounding edges of the glass
panel. They are not strong enough to withstand harsh outer
mechanical forces. Avoid touching the flexible printed circuits
by not only your hands, but also tools, chassis, or any other
object. Extreme bending of the connectors must be avoided
too. In case the flexible printed circuits are damaged, the
corresponding addressed portions of the screen will not be lit
and exchange of a glass panel will be required.
PDP Module Handling
When there is need to replace a broken PDP module which is the
displaying device from the Plasma monitor unit, consider the
following:
1. When carrying the PDP module, two persons should stand at
both shorter-edge sides of the glass-panel and transport it with
their palms. Avoid touching the Flexible Printed Circuits or the
chip tube on the corner of the glass-panel. Handle only by the
surface of the glass panel. In case of some PDP modules,
electrode repair is done by connecting between regular
terminal with Cu tape and Cu wire. Please do not hook and/or
damage this repair line. If it is damaged, the module will not
function unless the glass-panel is exchanged with a new
glass-panel.
2. When carrying PDP module, watch surrounding objects, such
as tables, and also do not carry it alone since it may be
dangerous and it will be damaged due to excessive stress to
the module (glass-panel).
3. Please do not stand the module with the edge of the glass-
panel on the table since this might result in damage to the
glass-panel and/or flexible printed circuits due to excessive
stress to the module (glass-panel).
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 make sure you are in a well
ventilated area in order to avoid inhalation of any smoke or
fumes released.
SAFETY NOTICE
USE ISOLATION TRANSFORMER
WHEN SERVICING
POWER SOURCE
This plasma television and the AVC Center is designed to
operate on 120 Volts/60Hz, AC house current. Insert the power
cord into a 120 Volts/60Hz outlet.
NEVER CONNECT THE PLASMA AND THE AVC CENTER TO
OTHER THAN THE SPECIFIED VOLTAGE OR TO DIRECT
CURRENT AND TO 50HZ. TO PREVENT ELECTRIC SHOCK,
DO NOT USE THE PLASMA TELEVISION’S (POLARIZED)
PLUG WITH AN EXTENSION CORD, RECEPTACLE, OR THE
OUTLETS UNLESS THE BLADES AND GROUND TERMINAL
CAN BE FULLY
UNSERTED TO PREVENT BLADE
EXPOSURE.
!
TABLE OF CONTENTS