Schematic And Pcb Connection Diagrams; S-Fcrw720 - Pioneer S-FCRW220-K Service Manual

S-FCRW220
QQ

S-FCRW720

3 7 63 1515 0
4. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
4.1 EXTERIOR SECTION
JA201
Line
IN
Level
AC120V
60Hz
TE
L 13942296513
www
.
50Hz : 120mV
6
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MAIN Volume
L. P. F.
A
2 1
Buff
IC 201
(+6dB)
NJM2904M
to Photo
FU1
Coupler
REK1067(5A) T11
+
Ó
−
Ó
D101-D104
S5688G
AMP ASSY
A
: AWU7760
[dBv]
30
20
7 LEVEL DIAGRAM
10
0
x ao u163
y
-10
A
i
-18.5dBv
+6dB
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2 9
8
OPERATON
ASSY : AWU7761
IC 201
H. P. F.
NJM2904M
5
Buff
OP Amp
Vref
+ 6.1v
+16v
D201
Vref
Power
IND
Q Q
3 6 7 1 3 T12 1 5
D31-D34
S5688G
co
+6dB
.
9 4 2 8
Gain Adj
Photo
Coupler
+16v +6 V
PC41
TLP621(Y)
B
0 v
Q201
7 2
Buff
2SC2412K
Offset
Cancel
+ 6v IC 41
IC 43
NJM2904M
NJM7806FA
+6 V
to Power
AMP
+12.6v -12.6v
D33
0 5 8 2 9 9 4 2 8
D31
D32
D34
IC 44
NJM7906FA
-6 V
- 6v
C
B
m
+8dB
9 9
C
1
9 9
-1.5