Sony HCD-EP303 - Printed Wiring Board CASSETTE Section; Schematic Diagram CASSETTE Section

2424
HCD-EP303
6-6. Printed Wiring Board CASSETTE Section
• See page 16 for Circuit Boards Location.
6-7. Schematic Diagram CASSETTE Section
0
1.2
1.4
4.1
0
0
8.1
0
0
4.1
1.4
1.2
0
0.6
0
0.6
0
0
0
0
3.6
9.7
9.7
9.3
No mark:FM
2
R-CH (REC/PB)
L-CH (REC/PB)
(ERASE)
HRPE701
(REC/PB ERASE HEAD)
CN701
4P
0.0018
15k
15k
0.0018
SW701 (4/6)
(REC/PB)
REC
R
PB
SW701 (2/6)
(REC/PB)
REC
r
PB
SW701 (3/6)
(REC/PB)
REC t PB
0.0027
0.022
+
50V
0.022
0.0068
Q706
REC BIAS OSC
SW701 (6/6)
(REC/PB)
REC T PB
Q704
2SC945
MUTING
CONTROL
SWITCH
25V
+
+
+
50V
5.6k
1.2k
0.1
SW701 (1/6)
(REC/PB)
REC
R
PB
0.1
50V
+
+
0.022
50V
+
+
0.1
50V
+
+
0.1
5.6k
1.2k
IN1 NF1 PC1 OUT1 GND
IN2 NF2 PC2 OUT2 VCC
ALC
IN1
ALC
CONST
ALC
IN2
RF
SW701 (5/6)
(REC/PB)
REC
r
PB
50V
+
IC701
ALC, REC/PB AMP
Q701, 702
MUTING
50V
50V
82k
2SC945
2SC945
2SC945
82k
+
+
CASSETTE BOARD
0.0015
0.0015
330
2SD1616-L
50V
100k
1N4148TP
1N4148TP
4.7k
(Page 23)
Q703
2SC945
MUTING
CONTROL
SWITCH
MAIN
BOARD
(2/2)
CN201
B
IC B/D
IC701
CASSETTE BOARD
B
MAIN BOARD
CN201
(Page 21)
1
2
3
4
5
6
E
E
E
E
E
K
A
A
K
SW701
(REC/PB)
REC
PB
HPRE701
REC/PB ERASE
HEAD
A
B
C
1 2 3 4 5
Ref. No. Location
D701 B-4
D702 B-4
IC701 B-3
Q701 A-4
Q702 B-4
Q703 B-4
Q704 A-2
Q706 C-2
• Semiconductor
Location
• See page 17 for Waveforms.
• See page 30 for IC Block Diagrams.