m
Schematic
Diagram
|
Page
BRAIN
CIRCUIT
cccneisaiccecaincansittihiteheeksianee
ances
14-17
SP
SWITCH
CIRCUIT
siitenceeeesooeeieanedateenee:
17
HEADPHONES
JACK
CIRCUIT
0...
cscs
ctessceecsnseeeeeeneneeseetnneneeennente
17
LEO
CIRCUIT
scuceticntice
natasha
ence
17
LAMP
(RIGHT)
CURCUIT
00.0...
.cccccccccscccsecsesesesssssssseseennsseessnunsnsneceensnneesnnenste
17
LAMP
(LEFT)
CIRCUIT
pccctncget
eernceritnnmaninencens
17
LIGHT
SWITCH
CIRCUIT
oocscccssessscssesssstnnsosesnsasessssssnsseasscsateerneseneneseneseae
17
POWER
SUPPLY
CIRCUIT
.........cssssssssssesssnstusesenennnernstinanisesesennsnssnsien
17
MJ
POWER
TRANSFORMER
CIRCUIT...
cceeseecsececsecsnententntnntnnnen
17
POWER
SWITCH
CIRCUIT..............
eA
eaihs
ean
aueneeta
Sart
ieee!
17
©
This
schematic
diagram
may
be
modified
at
any
time
with
the
development
of
new
technology.
Notes:
|
e
$3801
-
Power
“STANDBY
()
/ON"
switch
(POWER,
STANDBY
(@
/ON)
e
$802
:
Speaker
select
switch
(SPEAKER
A)
e
$803
:
Speaker
select
switch
(SPEAKER
B)
e
$805
:
Power
meter
light
adjustment
VR.
(POWER
METER
LIGHT)
e
VR909
._:
Power
meter
adjustment
VA
(L
ch)
e
VR910
=:
Power
meter
adjustment
VR
(R
ch)
|
SE-A900SM2
*
Voltage
values
and
waveforms
are
measured
as
indicated
in
the
schematic
diagram
when
test
points
between
and
EGY,
and
between
Gixies
anc
adie
are
shorted.
e
Indicated
voltage
values
are
the
standard
values
for
the
unit
measured
by
the
DC
electronic
circuit
tester
(high-impedance)
with
the
chassis
taken
as
standard.
Therefore,
there
may
exist
some
errors
in
the
voitage
values,
depending
on
the
internal
impedance
of
the
DC
circuit
tester.
No
mark:
Power
ON
e
Voltage
and
signal
line
:
Source
Signal
Line
(Lch)
ae
Positive
Voltage
Line
sesmpaeen
;
Negative
Voltage
Line
e
Important
safety
notice:
Components
identified
by
/\,
mark
have
special
characteristics
important
for
safety.
Furthermore,
special
parts
which
have
purposes
of
fire-retardant
(resistors),
high-quality
sound
(capacitors),
low-noise
(resistors),
etc
are
used.
When
replacing
any
of
components,
be
sure
to
use
only
manufacturer's
specified
parts
shown
in
the
parts
list.
e
Caution!
IC
and
LSI
are
sensitive
to
static
electricity.
Secondary
trouble
can
be
prevented
by
taking
care
during
repalr.
Cover
the
parts
boxes
made
of
plastics
with
aluminum
foil.
Ground
the
soldering
iron.
Put
a
conductive
maton
the
work
table.
Do
not
touch
the
jegs
of
IC
or
LSI
with
the
fingers
directly.
24S
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