JVC SEA-E30B - Page 4

A-E30B
2.
Service
Precautions
2-(1)
Prior
to
Servicing
Take
Special
Care
about
the
Following
Matters
1.
Parts
marked
with
A\
symbol
on
the
circuit
diagram
and
parts
list
are
important
for
safety.
When
replacing
those
parts,
be
sure
to
use
the
specified
parts
numbers.
2. Confirm that all metallic clamps are covered with vinyl
tubes,
3.
Confirm
the
thickness
of
newly
replaced
wire’s
insulat-
ing
film
(0.3
mm
and
more).
4.
When
the
power
cord
is
replaced,
the
new
one
does
not
come
out
if
it
is
pulled
in
all
different
directions.
2-(2)
Relation
between
Switch
Operation
and
Output
TAPE MONITOR
TAPE REC TERMINAL ‘OUT’
5.
Parts
relating
to
the
power
source
and
wires
have
been
bound
up
and
soldered.
6.
After
completion
of
soldering
parts
between
terminals
of
the
AC
power
fine,
confirm
that
there
remains
space
and
distance
more
than
3mm
between
neighboring
parts.
Pay
special
attention
to
solder’s
quantity,
bend
and
burr
of
wire.
LINE OUT TERMINAL ‘OUT’
LINE
IN
signal
LINE
IN
signal
SEA
et
ben
Moin
cles
ed
Operative
SEA
ON/OFF
.......
Operative
LINE
IN
signal
TAPE
playback
SB
Aree
el
ol
gee
6
Operative
SEA
ON/OFF
......
Inoperative
2-(3) Parts Replacement
1.
This
model
is
composed
of
the
parts
shown
in
the
dia-
gram
of
details
on
page
1-4,
“Disassembly”.
As
all
board
assemblies
are
fixed
to
the
chassis
with
screws,
refer
to
the
section
of
“Disassembly’’
when
disassemble
and
re-assemble
this
set.
2.
LEDs
built
in
SEA
volume
control
levers
can
be
removed
as
shown
in
the
figure
below.
If
one
of
LEDs
(for
a
block
of
right
or
left)
is
set
with
reverse
polarity
or
in
open
circuit,
all
LEDs
do
not
light,
As
adjoining
LEDs
are
set
with
reverse
polarity
alternate-
ly,
take
special
care
about
it
when
replacing
LEDs.
When
placing
an
order
for
a
single
LED,
specify
the
parts
number
of
AA3422K.
1-3 (No. 2786)
[How
to
distinguish
a
defective
LED
from
normal
ones|
aa \ =e
Pull
an
LED
slightly
forward
1—2
mm,
and
make
a
short-
circuit
at
its
both
lead
wires.
if
other
4
LEDs
light
in
this
state,
the
LED
is
defective.
Operation
lever
Cathode
ey (shorter lead)
SEA knob
Anode
(longer lead)
SEA volume