Pioneer A-550R/HE Manual de servicio - Página 7
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7
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8
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9
I
I
1
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12
1
A
1.
RESISTORS:
Indicated
in
Si,
ViW,
'/eW,
t5%
tolerance unless
otherwise noted k
:kU,
M
:
MO.
IF)
:
tl%,
|G)
:
*2%.
|K)
:
1
10%
|M);
±
20
%
tolerance
2.
CAPACITORS:
Indicated
in
capacity (pFl/voltage (V) unless otherwise
noted p
:
pF
Indication
without
voltage
is
50V
except
electrolytic capacitor.
3.
VOLTA
GE,
CURRENT:
|
|
:
Signal voltage
at
(
W
+
W
8u)output
(1kHz)
^
|
:
DC
voltage IV)
at
no
input
signal
Value
in
(
)
is
DC
voltage
at
rated
power.
mA
:
DC
current
at
no
input
signal
4.
OTHERS:
B
Signal route.
©
:
Adjusting
point.
The
^
mark
found
on
some component
parts indicates
the im-
portance
of
the safely factor of the
part.
Therefore,
when
replacing,
be
sure
to
use
parts of
identical
designation.
marked
capacitors
and
resistors
have
parts
numbers,
This
is
the basic
schematic diagram, but the
actual
circuit
may
vary
due
to
improvements
in
design.
SWITCHES
POWER
SW
assembly
S501
POWER
ROTARY
FUNC.
assembly
S901
ROTARY SW
LED assembly
S902
STANDBY
AF
COMPLEX assembly
S101
PHONO SEL MM/MC
(A-550R ONLY)
c
S701
FUNCTION
REC SEL
S702
FUNCTION
S703
DIRECT SW
ON/OFF'
TONE assembly
S601
SUB SONIC ON/OFF
(A-550R ONLY)
S602
LOUDNESS
S604
MUT.K
HEADPHONE assembly
S801-1
SP-A
ON/OFF
S801-2
SP-B ON/OFF
LINE
VOLTAGE
SELECTION
Line voltage can be
changed
with
the following
steps.
1.
Disconnect
the
AC
Power
cord.
2.
Remove
the top cover.
3.
Change
the connection
of the
power
transformer primary
pins.
Voltage
Power
transformer
Pin
No.
220V
3
240V
5
4.
Stick the
line
voltage
label
on
the rear panel.
Part
No.
Description
I
8
I
I
10
I
1
I
12
i
AAX-193
AAX-192
220V
label
240V
label
f