Symphonic WF803 - Maintenance and Care; Servicing and Cleaning Procedures; Disc Handling and Head Cleaning

TU701
AUDIO-OUT
Audio Block Diagram ( EWD2203 )
MOD-A
REC
AMP
7
6
AUTO
BIAS
99
P-ON+5V
P-ON+5V
Q421
BIAS
OSC
Q422
Q423 (PB=ON)
Q424
(PB=ON)
Q425
SWITCHING
D-REC OFF
4
EQ
AMP
LINE
AMP
MUTE
96
SP/LP-ON
P
R
ALC
(AUDIO PROCESS) 76
80
78
TUNER
LINE 1
LINE 2
2
14
4 A-PB/REC
CL504
3 A-COM
1 AE-H
2 AE-H/FE-H
AUDIO
HEAD
AUDIO
ERASE
HEAD
AC HEAD ASSEMBLY
FE HEAD
(DECK ASSEMBLY)
1 FE-H
2 FE-H-GND
CL501
1-10-7 1-10-8 H9410BLA
MAIN CBA
PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC
16
11 12
D-REC-H
D-REC-H REC/EE/PB
A-MUTE-H
D-PB-L
FROM
SERVO/SYSTEM
CONTROL BLOCK
DIAGRAM
FULL
ERASE
HEAD
IC301
JK752
A-IN
JK755
A-IN
FROM DVD AUDIO
BLOCK DIAGRAM
<DVD SECTION>
FRONT
REAR
IC751
(OUTPUT SELECT)
DVD-A(L)
DVD-A(R)
98
1 100
2
3
+
TP753
Q763
A-OUT (R)
BUFFER
Q762
BUFFER
TP754
A-OUT (L)
SW CTL
DVD
VCR
DVD
VCR
JK751
A-OUT (R)
A-OUT (L)
JK756
A-OUT (R)
A-OUT (L)
9 10 11
5
3
12
13
Q760
14
4
OUTPUT SELECT
FROM SERVO/SYSTEM
CONTOL BLOCK
DIAGRAM
DVD AUDIO SIGNAL
WF14
WF10