Magnavox sylvania DVC840F, Service Manual

Page: 26 / 71

1-11-4
Audio Block Diagram ( DVC865F )
TU701
SIF OUT
A
UDIO IN
REC AMP
SERIAL I/F
9
8
AU
T
O
BIAS
11
P-ON+5V
P-ON+5V
Q421
BIAS OSC
Q422
Q426 (PB=ON)
Q425
SWITCHING D-REC OFF
6
EQ AMP
LINE AMP
MUTE
LPF
10
SP/LP-ON
P
R
ALC
(A
UDIO PR
OCESS)
76
80
78
TUNER
LINE 1
LINE 2
2
15
4
A
U
DIO-PB/REC
CN504
3
A-COM
1
AE-H
2
AE-H/FE-H
A
UDIO
HEAD A
UDIO
ERASE HEAD
A
C
HEAD
ASSEMBLY
FE HEAD
(DECK
ASSEMBLY)
1
FE-H
2
FE-H-GND
CN501
MAIN CB
A
PB-AUDIO SIGNAL
REC-AUDIO SIGNAL
Mode : SP/REC
58
55
53
54
D-REC-H
A
U
DIO-MUTE-H
TO SER
V
O/SYSTEM
CONTR
OL BLOCK
DIA
GRAM
FULL ERASE HEAD
YCA-CS
YCA-SCL
YCA-SD
A
IC301
SIF
MOD-A
UDIO
A
UDIO(R)-IN-F
A
UDIO(L)-IN-F
A
UDIO(L)-IN
A
U
DIO(R)-IN
A
U
DIO(R)-OUT
A
U
DIO(L)-OUT
N-A-OUT
N-A-IN
JK752
A
UDIO(R)
-IN A
UDIO(L)
-IN JK754 A
UDIO(L)
-IN JK755 A
UDIO(R)
-IN
T
O
Hi-Fi A
U
DIO
BLOCK DIA
GRAM
T
O
Hi-Fi A
U
DIO
BLOCK DIA
GRAM
TO D
VD VIDEO/A
UDIO
BLOCK DIA
GRAM
<D
VD SECTION>
FR
ONT
REAR
IC751 (OUTPUT SELECT)
D
V
D-A
UDIO(L)
D
V
D-A
U
DIO(R)
3
2
4
5
D
V
D-A
UDIO(L)
D
V
D-A
U
DIO(R)
TP753
A-OUT (R)
TP754
A-OUT (L)
SW CTL
DV
D
VCR
DV
D
VCR
JK751
A
UDIO(R)
-OUT A
UDIO(L)
-OUT
JK756
A
UDIO(R)
-OUT A
UDIO(L)
-OUT
9
10
11
5 3
12 13
14
4
OUTPUT
-SELECT
T
O
SER
V
O/SYSTEM
CONT
OL BLOCK
DIA
GRAM
D
VD A
UDIO SIGNAL
WF10
(TUNER UNIT)
H9802BLA