FUNAI 29B-250, Service Manual

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Hi-Fi Audio Block Diagram ( B )
HG454BLH 1-7-5
ENV DET
LOGIC
R L
HOLD PULSE
LIM
OUTPUT SELECT
REC-AUDIO SIGNAL
PB-AUDIO SIGNAL
Mode : SP/REC
IIC-BUS SDA IIC-BUS SCL
A-MODE
LINE-MUTE
MUTE
MUTE-ON MUTE-ON
Hi-Fi-H-SW
IF SIGNAL PROCESS
JK758 A-IN(R)
N-A-REC
TO AUDIO BLOCK
N-A-PB
JK757 A-IN(L)
AFV CBA
TU-A
UDIO(R)
4
TU-A
UDIO(L)
5
4 5
CN701
C
N
1
SIF
2
2
CN701
CN1
TU701 SIF OUT
22
JACK CBA
MAIN CBA
JK101
A-IN1(R) A-IN1(L)
2 6 2 6 1 3 1 3
JK102
CN151 CN152
CN101 CN102
A-IN2(R) A-IN2(L) A-OUT1(R) A-OUT1(L) A-OUT2(R) A-OUT2(L)
A-IN2(R)
(Hi-Fi A
U
DIO SIGNAL PR
OCESS)
9
A-IN2(L)
8
9 8
A-OUT2(R)
6
A-OUT2(L)
11
6
11
A-IN1(R)
9
A-IN1(L)
7
9 7
A-OUT1(R)
5
A-OUT1(L)
11
5
11
IC451
Hi-Fi AUDIO (R) HEAD Hi-Fi AUDIO (L) HEAD
CYLINDER ASSEMBLY
Hi-Fi-
A(R)
7
Hi-Fi
-COM
8
Hi-Fi-
A(L)
9
CN253
48
47
14
15
R-CH INSEL
L-CH INSEL
ALC SW
SW ALC
62 61
71 70
24 26 27
34
33
L-CH BPF
COMP
SW NOISE
COMP
SW NOISE
R-CH BPF
VCO LPF
LIM
DEV
VCO LPF
LIM
DEV
MIX
V/I
NOISE DET
DO DET
P P R R
VCO
MUTE
73 74 72 76 77 75
37 38
21 53
39
L-CH PNR
ALC
R-CH PNR
ALC
67 65 52 56 54 50 60
2 6
10
8 4
78 80
+
Q451
TO SER
V
O/SYSTEM
CONTR
OL BLOCK
(DECK ASSEMBLY)
FR
ONT
JK751
A-OUT (L) A-OUT (R)
SUB JACK CBA
CN509 A-OUT1(L)
2
A-OUT1(R)
1
(TUNER UNIT)
Comparison Char
t of
Models & Marks
Model
Mark
29B-250 29B-750
A B