EasyManua.ls Logo

Sharp R-8R51 - Page 31

Sharp R-8R51
56 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
R-8RS1(W}
R
8R51(8)
SERVICING
Precautions
for
Handling
Electronic
Components.
This
unit
uses
CMOS
LSI
in
the
integral
part
of
the
circuits.
When
handling
these
parts,
the
following
precautions
should
be
strictly
followed.
CMOS
LSI
have
extremely
high
impedance
at
its
input
and
output
terminals.
For
this
reason,
it
is
easily
influenced
by
the
surrounding
high
voltage
power
source,
static
electricity
charged
in
clothes,
etc,and
sometimes
it
is
not
fully
protected
by
the
built-in
protection
circuit.
1)
When
storing
and
transporting,
thoroughly
wrap
them
in
aluminum
foil.
Also
wrap
PW
boards
containing
them
in
alumintum
foil.
2)
When
soldering,
ground
the
technician
as
shown
in
the
figure
and
use
grounded
soldering
iron
and
work
table.
rs
:
Shapes
of
Electronic
Components
@
Ec
Transistor
Transistor
2SB793
DTD143EA
ec®
Transistor
2SA933S
DTA143ES
DTA114YS
DTC114ES
DTB143ES
Servicing
of
Touch
Control
Panel
We
describe
the
procedures
to
permit
servicing
the
touch
control
panel
of
the
microwave
oven
and
the
caution
you
must
consider
when
doing
so.
To
carry
the
servicing,
power
supply
to
the
touch
control
panel
is
available
either
from
the
power
line
of
the
oven
proper
itself
of
from
an
external
power
source.
(1)
Servicing
the
touch
contro!
panel
with
power
supply
from
the
oven
proper:
CAUTION:
THE
HIGH
VOLTAGE
TRANSFORMER
OF
THE
MICROWAVE
OVEN
IS
STILL
A
LIVE
TO
GIVE
YOU
DANGER
DURING
SER-
VICING.
Therefore,
when
checking
the
performance
of
the
touch
control
panel,
put
the
outer
cabinet
on
the
oven
proper
to
keep
you
from
touching
the
high
voltage
transformer,
or
unplug
the
primary
terminal
(connector)
of
the
high
power
transformer
to
turn
it
off;
and
the
end
of
such
connector
shall
be
insulated
with
an
insulating
tape.
After
servicing,
be
sure
to
replace
the
leads
to
their
original
locations.
A.
On
some
models,
the
power
supply
cord
be-
tween
the
touch
control
panel
and
the
oven
proper
is
so
short
that
they
can‘t
be
separated
from
each
other.
For
those
models,
therefore,
check
and
repair
all
the
controls
{with
the
sensor-related
ones
included)
of
the
touch
control
panel
while
keeping
it
in
contact
with
the
oven
proper.
B.
On
some
models,
on
the
other
hand,
the
power
supply
cord
between
the
touch
control
panel
and
the
oven
proper
is
so
long
that
they
may
be
separated
from
each
other.
For
those
mod-
els,
therefore,
it
is
allowed
to
check
and
repair
the
controls
of
the
touch
control
panel
while
keeping
it
apart
from
the
oven
proper;in
this
case
you
must
short
both
ends
of
the
door
sensing
switch
(on
PWB)
of
the
touch
control
panel
with
a
jumper,
which
brings
about
an
operational
state
that
is
equivalent
to
that
with
the
oven
door
being
closed.
As
to
the
sensor-related
controls
of
the
touch
control
panel,
their
checking
is
allowed
‘f
the
dummy
resistor(s)
whose
resistance
ts
equal
to
that
of
those
controls
is
used.
(2)
Servicing
the
touch
control
panel
with
power
supply
from
an
external
power
source:
Disconnect
the
touch
control
panel
completely
from
the
oven
power,
and
short
both
ends
of
the
door
sensing
switch
(on
PWB)
of
the
touch
control
panel,which
brings
about
such
an
op-
erational
state
that
is
equivalent
to
that
with
the
oven
door
being
closed.
And
connect
an
ex-
ternal
power
source
to
the
power
input
terminal
of
the
touch
control
panel,
and
then
it
is
al-
lowed
to
check
and
repair
the
controls
of
the
touch
control
panel;
as
in
the
case
of
(1)
B
above,
it
is
here
also
possible
to
check
the
sensor-related
controls
of
the
touch
control
panel
by
using
the
dummy
resistor(s).
4.
Servicing
Tools
Tools
required
when
servicing
the
touch
control
panel
assembly.
1)
Soldering
tron:
30W
(To
prevent
leaking
current,
it
is
recommended
to
use
a
soldering
iron
with
grounding
terminal.)
2)
Oscilloscope:
Single
beam,
frequency
range:
DC
-
10MHz
type
or
more
ad-
vanced
model.
3)
Others:
Hand
tools
Other
Precautions
1)
When
turning
on
the
power
source
of
the
con-
trol
unit,
remove
the
aluminum
foil
applied
for
preventing
static
electricity.
2)
Connect
the
connectors
of
the
tndicator
and
key
unit
to
the
control
unit
taking
care
that
the
lead
wires
are
not
twisted.
3)
After
aluminum
foil
is
removed,
take
extra
care
that
abnormal
voltage
due
to
static
electricity
etc.
is
not
applied
to
the
input
or
output
termt-
nals.
4)
Attach
connectors,
electrolytic
capacitors,
etc.
to
PWB,
taking
care
that
all
connections
are
tight.
5)
Be
sure
to
use
specified
components
where
high
precision
is
required.
g
P
9
(RDSAZEAIN)

Related product manuals