User`s guide
VT420D 22 150-114
Troubleshooting
Before calling service personnel, please check the following chart for a possible cause to the trouble you are
experiencing.
m
Perform the adjustments according to page 10 “Operation The Monitor”
m
Refer to the following items if you can’t find a proper item listed in the Operating the Monitor or if the problem
remain.
m
if the problem you have experienced isn’t described below or you can’t correct the problem, stop using the
monitor and call service personnel or VarTech.
Problem Check these things
No Display Check the power plug insert on wall outlet..
Check the main power switch
If AC socked is OK, please check another set of equipment.
Check input single, the signal may not be suitable.
Display is not in the center. If the signal timing of the computer is within the spec.
Display is shaking. If the signal timing of the computer is within the spec.
The remote control doesn’t work Make sure the battery is inserted matching the + and – marks of the
battery compartment.
The battery may be exhausted..
Use the remote control aiming at the remote control sensor.
The picture color is pale, or not clear
Check picture quality to adjust.
If you are using YUV terminals, make sure cables are correctly connected.
Compliance
FCC
Compliance
Statement:
This
equipment
has
been
tested
and
found
to
comply
with
the
limits
for
a
Class
A
digital
device,
pursuant
to
part
15
of
the
FCC
Rules.
These
limits
are
designed
to
provide
reasonable
protection
against
harmful
interference
when
the
equipment
is
operated
in
a
commercial
environment.
This
equipment
generates,
uses,
and
can
radiate
radio
frequency
energy
and,
if
not
installed
and
used
in
accordance
with
the
instruction
manual,
may
cause
harmful
interference
to
radio
communications.
Operation
of
this
equipment
in
a
residential
area
is
likely
to
cause
harmful
interference
in
which
case the
user
will
be
required
to
correct
the
interference
at
his
own
expense.
Warning
This
is
class
A
products
.
In
a
domestic
environment
this
product
may
Cause
radio
interference
in
which
case
the
user
may
be
required
to
t
ake
adequate
measures.
This
device
complies
with
Part
15
of
the
FCC
Rules.
Operation
is
subject
t
o
the
following
two
conditions
:
(1)
this
device
may
no
t
cause
harmful
interference,
and
(2)
this
device
must
accept
any
interference
received,
including
interference
that
may
cause
undesired
operation
.
CE
EN
55022
、
EN
61000-3-2
、
EN-61000-3-3
EN
55024
、
IEC61000-4
EN
60950
[Low-Voltage
Directive
(73/23/EEC)]