Pioneer SA-708 - Schematic Diagram

VRI: VOLUME
Acv-18t
SS: LOUDNESS
ASK~i58
VOLUME Assy GWG — 130
}Q201, 202
2SA978-F
#Q203,204
es)
paoz R409
27% R425,
21, 402 ex
2S8A798-G vai, 2:
03, 404 LEVEL Ady
2sc22ai-F ieee
10405, 406
2SA726S-F
~404 182076
5,406 1S1555
: Mz-240
pa | A
‘R44
0.221
0407
0409, 410
407, 408
(aw)
fax
0413,
0415, 416
411, 412
D4li~4i4
1s1555
§<)
GY 0407,408 28¢2229-r
0413, 414 28Cc2238-Y
Q409, 410 2Sa949-Y
SP SWITCH Assy
GWX 335
Tw)
St0-1 REGS 0
Ow PON ssouw) f
6 6) ott
i
=
INDICATOR Ass y AWV-004
ape =
[CURRENT
VEL SI
———
2,3
COMPARATOR
7
Palfglsd
HEADPHONE Assy
R605 330 ip
[o 2 ©) ©] sreanen A
[9 © © @] SPEAKER 8
= i
| i
Hd
ihe
[inca t-—j—_—_J |
320>] soma
ty
ot
OFF
SET
Le HIE T
LEVEL
SHIFT
|_| Prdak al
HAIZ010
1. RESISTORS;
Indicated
in
2,
1/4W,
+5%
tolerance
unless
otherwise noted
KrkQ,
MIMO,
(F)7218,
(G);228,
(K)7#108
tolerance
2. CAPACITORS;
Indicated in capacity (uF) /voltage(V) unless
otherwise noted p:pF
Indication without voltage is 50V except
electrolytic capacitor.
3. VOLTAGE, CURRENT;
[[W]; signal voltage at 65 + 65W 82 output (1kH2)
Tl); de voltage(v) at no input signal
Value in ( ) is DC voltage at rated power,
<=] mA ; DC current at no input signal
4. OTHERS;
=> =; Signal route
@ i; Adjusting point
the
f\
mark
found
on
some
component
parts
indicates
the
importance
of
the
safety
factor
of
the
part.
Therefore,
when
replacing,
be
sure
to
use
parts
of
identical
designation.
This
is
the
basic
schematic
diagram,
but
the
actual
circuit may vary due to improvements in design.
SWITCHES
Sl TAPE DUPLICATE = 1+2-SOURCE-2+1
$2 TAPE MONITOR 1-OFF-2
$3 MUTING OFF~ -20dB
S4 MODE | STEREO-MONO
SS LOUDNESS OFF-ON
S6 TONE OFF-ON
$7 SUBSONIC OFF-oN
S8 PHONO INTERFERENCE OQFF-ON
$9 FUNCTION TUNER-PHONO-AUX
$10 SPEAKERS OFF-A-B-A+B
S11 POWER QFF-ON
The underlined indicates the switch position.
External Appearance of
Transistors and ICs
2SA733A
2SC945A
Lot No
Type No re
Suffix
2SA798
Type No
Lot No hre
BI
cl
c2
B2
TA7318P
HA12010
Fee
eee:
Fak
ered!
SRI
Teens
(eens
ee
(ene
eee
Kareena
2SA968
2S8C2238
2S8D313
Type No:
Re Lot No
2SA904A :
28C1 914A
uf fix
Lot No
Type No
hFE
B
c
E
2SA905
Lot No
Type No
hre
B
c
i=
2SA949
2SC2229
Lot No
Type No
hee
E
be B
2SA1075/A/
2SC2525/A/
Type No.
Lot No
B hre
c Ee
2SA978
2SA1100
2S8C1919
2SC2575
Lot No
Type No
hre
B
c
E
Lot Ni
28C2291
Type No.
Lot No: hre
El
cr
B
c2
2SK34
loss
0
SA-708
9
2SA726S
Dot
Lot No
Type No
hre
Y A
ce
2SB507
28C1384
hee.
Type No
Lot No
—E
c
2SC1400
Lot No
Type No
hre
E
c
E2
Type No
Oo