Pioneer A-7 Manual de servicio - Página 12

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POWER AMP Ass'y
AWH -117
Q,2
2SKi29A
Q3,4
2SC2294
Q5,6
2Sa979
Q9,10 2S¢2259
QUA2
2SA7334
Q134 2SA905A
QIS,16 2SCIS15A
Q17,18, 23,24
2SC2603/A/
QI9~V 22
2SAIIIS/A/
Q25,26
2S5A893A
Q27,28
2SC1890A
Q29,30
2SC2275
Q31,32
2Sa985
POWER
AMP
|
Parente
ry
025~ 28, 39~
Q33 NJM45580X
J
CONNECTOR
Ass'y(F) !
rq
1S2471
00
O21~ 24
Mz-047
/63
033,34
= MZ-150
DIOI102
MZL240
aot
2S58507P
QO2
2S50313P
REGULATOR
a
le
J at
nN ba
Ba
"eae
2
a
ABC
OE
F
y (Basa)
PROTECTION Assy
1, RESISTORS:
GWM- 236
Indicated in 2, "UW, +5% tolerance unless otherwise noted k : ki2,
(a=
ara
a
=.
og
|
M2 M&1, (F) : +1%, (G): 2%, (K): «10% tolerance
'
L2or
t
U0
RLa-4
3 VOLTAGE, CURRENT:
[J
Signat voltage at
70 W+
70W_—
? output (1kHz)
"TJ
OC voltage
(V) at no input signal
Value in (
} is DC voltage at rated power
<2 mA:
OC current at no input signal
4, OTHERS:
a> : Signal route.
Q1,3
28C2525
Q2,4
2SA1075
POWER
AMP
@ : Adjusting point.
St:
REC OUT SELECTOR
2=1-—
1&2 - SOURCE —- PHONO~ TUNER - AUX
D201~
204
0205
1$2471
182473
_——_——
RL4: RELAY
ASR-O68
S2-1) FUNCTION (PHONO)
ON - OFF
S2-2: FUNCTION (TUNER)
ON - OFF
$2-3: FUNCTION (AUX)
ON - OFF
=
[|
ae
as
=
S2-5 FUNCTION ( TAPE2)
ON- OFF
'
<i
$3:
MUTING (-2008)
ON ~ OFF
_ SWITCH _Ass'yiC) (2/2)
2200p
$4-1: PHONO (MC)
ON - OFF
|
5
S4-2: PHONO (MM)
ON ~ OFF
ol'
S4-5: LOUDNESS
ON - OFF
Is5-3-3 J
PS
i} SPEAKER (A)
54.6: SUBSONIC
ON - OFF
elal®
SS-1: LINE STRAIGHT
ON - OFF
ii
5-2: MODE
STEREO- MONO
4
x
S5-3: SPEAKER (A)
ON — OFF
S5-4:
SPEAKER
(8)
ON ~ OFF
©
S6:
POWER
ON - OFF
|
©
DrRAKER
Ce)
s7
LINE VOLTAGE
SELECTOR
220V-240V
o t
| ®
8
The underlined indicates the switch position
ce
This is the basic schematic diagram, but the actual circuit may vary
|
ASG-280
POWER
SUPPLY
Ass'y
GWR-139
HEADPHONE Assy
6.
2)
0
Vaid
a
(5)
:
+
<u
pet
DIO1~, 104
SR3AM~4
SREGULATOR
oiio~w its
"are
S7
UNE
VOLTAGE
SELECTOR
AKX -O57
pOVvOREr
ROC
=- 2 O%mMo
Aw»
&
>
o
©
rs
es
O
107
rt
CO
12
—_——