Hitachi 42HDM12, Service Manual

Page: 2 / 41

2
CAUTION FOR SAFETY
Please read this page before repair the monitor.
The following safety precautions are designed to help you stay safe and prevent accidents during the repair
work.
z
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."
z
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 Monitor 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 Monitor contains high
voltage parts and power 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.
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.
„
Do not try to check the HDCP code and
combination circuit.
Use only the recommended components
or componentst 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.
Never remove the shield case protecting
the HDCP code and combination circuit.