1-7-9
T6450BLA
Audio Block Diagram
REC
AMP
100
3
AU
T
O
BIAS
2
1
+5V
+5V
Q854
Q856
BIAS
OSC
Q855
Q853(PB=ON)
Q852(PB=ON)
Q851
SWITCHING
D-REC-OFF
5
EQ
AMP
9
8
7
LINE
AMP
REC-ON
TP007
A
UDIO HD-SW
CONTR
OL
MUTE
11
6
PB-ON
SW CTL
SP/LP-ON
P
R
ALC
DET
ALC
IC401
(A
UDIO SIGNAL PR
OCESS)
IC701
(SW)
3
A-PB/REC
CL402
4
A-COM
6
AE-H/FE-H
5
FE-H
A
UDIO
HEAD
A
UDIO
ERASE
HEAD
A
C
E HEAD ASSEMBL
Y
FE HEAD
1
FE-H
2
FE-H-GND
CL403
MAIN CB
A
PB-AUDIO SIGNAL
REC-AUDIO SIGNAL
Mode : SP/REC
71
A-MUTE-H
SCL
SD
A
TO
SER
V
O/SYSTEM
CONTR
OL BLOCK
T
O
SER
V
O
/SYSTEM
CONTR
OL
BLOCK
FULL
ERASE
HEAD
68
69
SERIAL
DECODER
(DECK ASSEMBLY)
12
16
INV
AT
T
IC301
7
1
IC151
(AMP)
(VIDEO/A
UDIO/CHR
OMA/DEFLECTION/IF)
SP
1
SP-GND
2
JK151
HEADPHONE J
A
CK
SP151
SPEAKER
CN804
CL801
SP-MUTE
OUTPUT
AMP
50
52
53
54
MUTE
5
1
2
15
5
3
4
6
2
1
A
UDIO OUT
TU001
JK702
A-IN
JK703
SCAR
T
LINE
SCAR
T
LINE
A-IN
A-OUT
Q701
10
11
9
SCAR
T
-H
EXT
-L
SCAR
T
-MUTE
TUNER1
LINE
N-A-PB
AT
T
A
UDIO
MUTE
WF7
WF9
WF8
TO
SER
V
O/SYSTEM
CONTR
OL BLOCK
21
A
UDIO OUT
TU002
15
13
17
TUNER1
TUNER2
LINE
13
12
14
SW CTL
13
12
14
IC702
(SW)
TU1
TU2
11
1ST-SND-H
T
O
SER
V
O
/SYSTEM
CONTR
OL
BLOCK
G,J
,M
NO
TE FOR
WIRE CONNECT
ORS:
1.
PREFIX SYMBOL "CN" MEANS CONNECT
OR.
(CAN DISCONNECT AND RECONNECT
.)
2.
PREFIX SYMBOL "CL" MEANS
WIRE-SOLDER
HOLES OF
THE PCB
.
(WIRE IS SOLDERED DIRECTL
Y
.)
TEST POINT INFORMA
TION
:INDICA
TES A
TEST POINT
WITH A JUMPER
WIRE A
C
R
OSS A HOLE IN
THE PCB
.
:USED
T
O
INDICA
TE A
TEST POINT
WITH A COMPONENT LEAD ON FOIL SIDE.
:USED
T
O
INDICA
TE A
TEST POINT
WITH NO
TEST PIN.
:USED
T
O
INDICA
TE A
TEST POINT
WITH A
TEST PIN.
" " = SMD
Comparison Char
t of Models & Marks
Model
Mark
14PV135/01
14PV235/01
14PV385/39
H
K
J
Model
Mark
14PV135/07
14PV235/07
14PV385/07
E
F
G
I
14PV385/01
14PV135/58
14PV235/58
L
M
