Hitachi Alpha L42A404, Service Manual

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L42A404
2
Caution for Safety
Please read this page before repair the TV.
The following safety precautions are designed to help you stay safe and prevent accidents during the repair work.
●
Please take note of these cautionary flags.
WARNING
This means
"Potential to sustain injury or even death."
CAUTION
This means "Potential to sustain breakage or irreparable damage."
●
Also note these cautionary icons.
This means "CAUTION" This means "MUST"
This means "POTENTIAL
ELECTRIC SHOCK"
This means "DO NOT"
WARNING
■
Follow instructions.
■
Must use same types of wires and components.
The cabinet, chassis, and labels
are parts that require attention.
You must follow the caution notes
and safety instructions presented
throughout this User Manual to
prevent damage to them or injury
to yourself.
■
Prevent electric shock.
The TV uses special tubes and
tapes made from insulated
materials. Moreover, some
materials are kept from making
contact with the PWB for the sake
of safety. Internal leads are kept
from hot parts or high voltage
parts by means of clamps or
other measures. As such, you
must restored these parts to their
original conditions in order to
prevent electric shock or fire.
■
Perform safety check when done.
Exercise caution while working
on the device as the TV contains
high voltage parts and supply. It
is possible to sustain severe
injury or death if you accidentally
touch the wrong parts. You must
disconnect the power supply
while servicing, reassembling, or
change parts. If you touch a live
connection it is possible to
sustain severe injury or death.
■
Use recommended components.
Use only the recommended
components or components that
structurally identical to the
originals. This is to ensure safety
and reliability. Pay special
attention to parts in the parts list
and circuit diagrams marked with
. If you use
non-recommended components,
then electric shock or fire may
result.
Every part (such as removed
screws, components, and wiring)
must be restored to their prior
conditions after servicing. Be
sure to check everything that was
repaired for damage or mistakes.
Also measure the insulated
impedance with a meg-ohm
meter to confirm that the
impedance value is more than 4M
ohm. If the impedance value is
less than 4M ohm, then electric
shock or fire may result.