CTX CMS-3436 - SAFETY PRECAUTIONS; High Voltage Safety Precautions; X-radiation Safety

SAFETY
PRECAUTIONS
NOTICE:
Comply
with
all
cautions
and
safety
related
notes
located
on
or
inside
the
cabinet
and
on
the
chassis
or
picture
tube.
The
following
precautions
should
be
observed.
1.
Do
not
install,
remove,
or
handle
the
picture
tube
in
any
manner
unless
shatterproof
goggles
are
worn.
People
not
so
equipped
should
be
kept
away
while
picture
tubes
are
handled.
Keep
picture
tube
away
from
the
body
while
handling.
When
replacing
a
chassis
in
the
monitor,
all
the
protective
devices
must
be
put
back
in
place,
suchas
barriers,
non-metallic
knobs,
adjustment
and
compartment
shields,
and
isolation
resistor-
capacitor,
etc.
When
service
is
required,
observe
the
original
lead
dress.
Extra
precaution
should
be
taken
to
assure
Correct
lead
dress
in
the
high
voltage
circuitry
area.
Always
use
the
manufacturer’s
replacement
components.
Especially
critical
components
as
indicated
on
the
Replacement
parts
list
should
not
be
replaced
by
other
manufacturer’s.
Fur-
thermore
where
a
short
circuit
has
occurred,
replace
those
components
that
indicate
evidence
of
overheating.
Before
returning
a
serviced
monitor
to
the
cus-
tomer,
the
service
technician
must
throughly
test
the
unit
to
be
certain
that
it
is
completely
safe
to
operate
without
danger
of
electrical
shock,
and
be
sure
that
no
protective
device
built
into
the
monitor
by
the
manufacturer
has
become
defec-
tive,
or
inadvertently
defeated
during
servicing.
Therefore,
the
following
checks
should
be
per-
formed
for
continued
protection
of
the
customer
and
service
technician.
High Voltage
This
monitor
is
provided
with
a
high
voltage
hold
down
circuit
for
clearly
indicating
that
voltage
has
increased
in
excess
of
a
predetermined
value.
Comply
with
all
notes
described
in
this
Service
Manual
regarding
this
hold
down
circuit
when
servicing,
so
that
this
hold
down
circuit
may
function
correctly.
Service Warning
With
minimum
Brightness
and
Contrast
the
operating
high
voltage
in
this
display
is
lower
than
25KV.
If
any
component
having
influence
on
the
high
voltage
is
replaced,
confirm
that
the
high
voltage
with
minimum
Brightness
and
Contrast
is
lower
than
25
KV.
To
measure
high
voltage
use
a
high
impedance
high-voltage
meter.(SENSITIVE
RE-
SEARCH
Model:
ESH
or
Equivalent)
Connect
(-)
to
chassis
earth
and
(+)
to
the
CRT
anode
button.
(See
the
following
connection
diagram
Fig.
1.)
NOTE:
1)
Turn
power
switch
off
without
fail
before
making
the
connection
to
the
Anode
button.
2)
Beforeturn
power
switch
ON,
confirm
the
AC
line
voltage,
set
the
"Voltage
Selector".
CRT ANODE
HIGH IMPEDANCE
H.V.METER
SENSITIVE RESEARCH
Model:ESH
or
equivalent.
CHASSIS
GROUND
Fig. 1
X-radiation
TUBE:
The
primary
source
of
X-radiation
in
this
monitor
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,
manufacturer
ap-
proved
type.
When
troubleshooting
and
making
test
measurements
in
a
monitor
with
a
problem
of
excessive
high
voltage,
avoid
being
unneces-
sarily
close
to
the
picture
tube
and
the
high
voltage
components.
Do
not
operate
the
chas-
sis
longer
than
is
necessary
to
locate
the
cause
of excessive voltage.