Philips 24MC4306/37, Service Manual

Page: 35 / 131

1-10-4
T2221BLH
Hi-Fi Audio Block Diagram
57
48
47
13
14
69
6 7
R-CH INSEL L-CH INSEL
NOR SW
SERIAL DATA DECODER
OUTPUT SELECT
VCO
LPF
L-CH BPF
R-CH PNR
PILOT DET
CONT
STEREO PLL
STEREO FILTER SAP FILTER
SAP DET
SIF DEMOD
SAP DEMOD
L-R DEMOD
ST/SAP SW
MATRIX
L-CH PNR
LIM
DEV
COMP
SW NOISE
VCO
LPF
LIM
DEV
COMP
COMP
D.C
NOISE SW
dBX DEC
ENV DET
MODE OUT
RIPPLE FILTER
DO DET
MATRIX
R-CH BPF
P R
R L
P R
HOLD PULSE NOISE DET
34
33
23
4
80 78 37 38 54 77
1
39 26 24 27
N-A-OUT
LIM
49
AUDIO-OUT(L)
AUDIO-OUT(R)
N-A-IN
Hi-Fi-H-SW
AUDIO-MUTE
NORMAL-H
40
ST/SAP-IN
TO AUDIO BLOCK DIAGRAM
SCL
P-ON+9V
Hi-Fi AUDIO (R) HEAD Hi-Fi AUDIO (L) HEAD
CYLINDER ASSEMBLY
MAIN CBA
CL1401
IC1701
(MTS/ SAP/ Hi-Fi AUDIO PROCESS/ Hi-Fi HEAD AMP)
PILOT CANCEL
TO AUDIO BLOCK DIAGRAM
62
63
JK1702
A
UDIO(L)-IN
JK1703
A
UDIO(R)-IN
SIF
T
O TV
PR
OCESS
BLOCK DIA
GRAM
Q1701
TP1702
TP1701
SDA
Hi-Fi-L
Hi-Fi-R
PB A
UDIO SIGNAL
REC A
UDIO SIGNAL
Mode : SP/REC TO SYSTEM CONTROL/SERVO BLOCK DIAGRAM TO SYSTEM CONTROL/SERVO BLOCK DIAGRAM TO SYSTEM CONTROL/SERVO BLOCK DIAGRAM
Hi-Fi-
A
UDIO(R)
7
Hi-Fi
-COM
8
Hi-Fi-
A
UDIO(L)
9
“
“ = SMD
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
CR
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.