Video and audio signal-processing ic, Overview functions, Block diagram – Sanyo EP58B User Manual
Page 28
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54
SANYO TV . VCR
SANYO TV . VCR
LA71206M/7M
1
2
3
4
5
6
7
8
9
10
11
12
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14
15
16
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18
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20
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
47k
Ω
1.5k
Ω
22k
Ω
560
Ω
3.9k
Ω
+
+
0.1
µ
F
0.1
µ
F
0.01
µ
F
47
µ
F
+
+
22
µ
F
33
µ
F
0.1
µ
F
10
µ
F
4.7
µ
F
1
µ
F
0.1
µ
F
0.01
µ
F
+
+
+
1
µ
F
+
+
+
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
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80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
SP (Hch)
SP (Lch)
A-VCC
EP (Hch)
EP (Lch)
47k
Ω
3.9k
Ω
0.1
µ
F
100
µ
F
0.033
µ
F
1
µ
F
0.022
µ
F
(M)
A-GND
Audio IN1
Audio IN2
47k
Ω
47
Ω
2.2k
Ω
1k
Ω
10k
Ω
27k
Ω
1k
Ω
2.2
Ω
3.9k
Ω
8.2k
Ω
12k
Ω
1k
Ω
330k
Ω
27k
Ω
1.5k
Ω
4.7k
Ω
0.1
µ
F
1000
µ
P
2200
µ
P
390
µ
P
200
µ
P
Audio IN3
51
Ω
75
Ω
75
Ω
100
Ω
150
Ω
+B=5V
2SD734
AE
FE
2SA1318
2SC3331
2SC3331
R/P
TO MICOM
(PB-Low)
LINE OUT
22
µ
F
470
µ
F
REC/PB
Y-FM
M EMPH
PB EQ
MONI
Y-VCC
VCC
VCC
V SYNC OUT(REC)
QV/QH INS(PB)
C.SYNC OUT
+
+
1
µ
F
10
µ
F
0.1
µ
F
+
1
µ
F
+
1
µ
F
+
1
µ
F
+
+
+
1
µ
F
0.01
µ
F
1
µ
F
1
µ
F
0.022
µ
F
0.01
µ
F
0.1
µ
F
0.047
µ
F
0.01
µ
F
VIDEO OUT
2.2k
Ω
680k
Ω
1.2k
Ω
1.8k
Ω
8.2k
Ω
10k
Ω
20k
Ω
VCC
Video IN3
75
Ω
+
10
µ
F
Video IN2
75
Ω
100k
Ω
100k
Ω
+
10
µ
F
Video IN1
CCD
VCC
C-VCC
4Fsc
ALWAYS
5V
PB C OUT
REC C MONI
+
1
µ
F
3.58M
NTSC
CLOCK IN
DATA IN
S.C. IN
10k
Ω
20k
Ω
COMP
OUT
ENV
DET
HA SW
AUDIO-MUTE
C-ROT
RF SW
0.047
µ
F
0.047
µ
F
HA-GND
HA VCC
TOLERANCE
LESS THAN 1%
for REC CURRENT
adjustment
KILL
DET
COMP
OUT
ENV
DET
AUDIO
MUTE
HA SW
C-ROT
RF-SW
IN
C-GND
HA
GND
CHROMA
DET
ACC
DET
P
P
R
HA VCC
H
I
P
P
R
B
H
R
P
R
P
R
P
R
P
R
R
P
R
P
R
P
R
P
R
P
1
2
3
1
2
3
A-GND
A-VCC
I
HA
PRF GND
+
ALC
ALC
DET
Vret
2.3V
LPF
LINE
AMP
FM
AGC
PB
FM-EQ
REC
FM-EQ
MA IN
DF-FM
V.SYNC
SEP
SYNC
SEP
SUB
LPF
FM
DEM
DOUBLE
LIM
S-EQ
6DB
QV-QH
FBC
1/2
REG
4V
VIDEO
AGC
VCA
DRIVER
CCD
BGA
CNC
B.D.
3.58M
RPF1
Y/C
MIX
NC1
CLAMP
ACC
AMP
ACC
DET
4.21M
BPF
Sub
CONV
N.L.
DFFM
FM
MOD
MAIN
FMPHA
NL
FMPHA
DFTAIL
FNH
PB
AMP
BGA
BGA
OUT
PLL
SLD
320FH
VCO
VXO1
REC
APC
SERIAL
DECODER
AUTO-BIAS
CLAMP
CLAMP
REC
AMP
MUTE
SP.LP
EQ
AMP
HA
PB.EE
REC:LP.EP
PB :EP
FB.EE
VREF
AUTO
BIAS
PHASE
EQ
fo-ADJ
PHASE
EQ
Q-ADJ
VHS
SQPB
FM
AGC
FIL
Y-GND
MAIN
EMPHA
FIL
S
DET
VCP
BAL
TC1
Y-VCC
AGC
TC2
CLOCK
VSS
VSS
OUT
IN
VCA
4F sc
VDD
ALWAYS
5V
CCD
LA89964
PB
APC
REC
AFC
YNR/COMB
R
R
R
R
R
P
R
P
P
P
P
PB-C
PR-C
R-EQ
TEST
NORMAL
C-LPF
Main
CONV
3.58M
BPF2
B-DP
AMP
C-VCC
TIMMING
LA71750EM
+
+
+
+
+
+
+
+
+
+
1k
Ω
1k
Ω
2k
Ω
10k
Ω
2.2
Ω
22k
Ω
0.01
µ
F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
21
22
23
24
25
26
27
28
29
30
79
80
50
49
48
47
46
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43
42
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40
39
38
37
36
35
34
33
32
31
82
83
84
85
86
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89
90
91
92
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94
95
96
97
98
99
100
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
58
57
55
53
52
51
2SC3331
2SC3331
2SA1318
R/P
560
Ω
AE
FE
SP (Lch)
SP (Hch)
+B(5V)
47
Ω
Use of commonness is
possible
EP (Lch)
EP (Hch)
Use of commonness is possible
H.A VCC
+
+
+
+
REC CURRENT IS DECIDED
BY THIS RESISTOR VALUE,
AND A TOLERANCE OF THE
RESISTOR VALUE WHICH
WE RECOMMEND IS
±
1%
81
PHASE
COMPEN
fo-CTL
REC-MUTE
CONTROL
for H.A.
COMP OUT
ENV DET
REC/PB
Y-FM
2.2k
Ω
1.2k
Ω
220P
2.7k
Ω
130P
6.8k
Ω
18k
Ω
10k
Ω
HA-SW
-IN
C-ROT
-IN
SERIAL
DA
TA
IN
RF-SW
-IN
C SYNC OUT
CHARA. INS.
AUD-MUTE
4.7k
Ω
27k
Ω
1.2k
Ω
330k
Ω
12k
Ω
10k
Ω
12k
Ω
1.2k
Ω
8.2k
Ω
5.6k
Ω
MA
IN EMPHA
OUT
10k
Ω
18k
Ω
SERIAL
CLOCK IN
V SYNC OUT
V
ideo OUT
1
To
O
SD etc
V
ideo OUT
3
To
SCAR
T2(DEC)
V
ideo OUT
2
To
SCAR
T1(TV)
V
ideo IN 5
OSD(PB)
V
ideo IN 4
FRONT
Video IN 2
SCART1(TV)
V
ideo IN 3
SCAR
T2(DEC)
DRV
DRV
DRV
+
+
OSD
CANAL DECODER
SUB
TITLE
DECODER
VPS OUT
(1Vpp)
Video IN 1
TUNER
GND
IN STANDBY MODE
SW1 FIXED ON IN1
SW2 FIXED ON IN3
SW3 FIXED ON IN2
44
PB H OUT
GND
SYNC SLICE PED.SIDE
3.9k
Ω
4.7k
Ω
8200P
1200P
1200P
+
+
+
+
180
Ω
LINE OUT
Audio IN1
Audio IN2
Audio IN3
REC:LOW C OUT (SECAM C IN) PB:FM OUT (SECAM FM OUT)
PB:C OUT
(SECAM C IN)
19
+
GND
PAL-GBI
PAL-MN
LP/EP
PB/EE
A.GND
SP
REC Vref
REC:LP/EP
PB:EP
100
Ω
PB/EE
R/P-EQ
SEPARATE
(REC)
SP/LP
R/P-EQ
COMMON
R/P-EQ
SEPARATE
PB REC/EE
CHROMA
A-VCC DET C-GND
C-VCC
AUDIO
HD-SW
CTL
ACC
DET
FRAME
P/S AFC
FILT
2FSC-OUT
VCO
RD
FRAME
PB H OUT
CCD
GND
CCD
VCC
FBC2
DET
VCA
DET
DELAYED
SIGNAL
NT/NT
LC89984/85
M/M
Fsc
CLK
IN
C-MAIN
REC
BGA
PB
BGA-A
PB
BGA-B
C-DELAY
PB
R/PA
P
P
P
R
R
R
R
PHASE
COMPEN
Q-CTL
HA GND
FM
AGC
P
P
R
WHEN SQPB,
EQ BYPASS
REC
FM AGC2
REF
REC
FM AGC2
FILT
P
P
R
R
HA
PRE GND
REC:ON
H.A.
VCC
Y
C
REC:ON
Y
C
FBC1
FBC1
DET
Y-VCC
Y-GND
AGC BYPASS
AGC NORMAL
Y
C
P
PB_Y
PB_C
AGC
TC2
FBC3
DET
ALWAYS
5V
FRAME
2
1
59
56
54
R
P
R
FM
AGC
REC
FM-EQ
REC
FM-EQ
FM
MOD
W/D
CLIP
NL
EMPHA
PHASE
COMPEN
DOUBLE
LIM
PB_FM
EQ.
DETAIL
ENH
MAIN
DE-EM
Y-DELAY
SUB
LPF
FM
DEM
P
R
ENV
DET
P
P
R
R
H
L
REC
FM AGC2
+
H
L
AUTO
BIAS
REC
AMP
EQ
AMP
INVERTER
ATT
LPF
Vref
2.3V
LINE
AMP
MUTE
ALC
DET
1 2 3
P
R
P
R
VCO SLD
CNC
NAP
BPF
NAP
KIL
B.D.
REC
APC
PB
APC
REC
AFC
KIL
DET
SYNC
DET
VXO2
VXO1
SECAM DET
PAL M DET
P
R
1H/2H
D.L
Y_DELAY
INV
D.L
EQ
D.L
EQ
COMB
AMP
BPF1
ACC
ACC
DET
CCD
LPF
FBC2
4
3
2
1
SW1
Mute
Mute
5
4
3
SW2
5
SW3
REG
4V
VIDEO
AGC
CLP5
CLP4
60B
AMP
60B
AMP
VCA
AGC
TC1
CAR
BAL
CLP3
CLP2
CLP1
P
R
P
R
P
R
P
R
SYNC
SEP
6DB
AMP
Chara
INS.
1/2
FBC3
NL
DeEM
NC1/2
PIC
CTL
Y/C
MIX
BPF2
BPF3
Sub
CONV
SERIAL
DECODER
Y.N.R
Y-DELAY
Y-LPF
C-LPF
KIL
B-UP
AMP
Main
CONV
BEFORE
AFTER
BIAS OSC
ALC
Y-LPF
F-TEST
Block Diagram
Overview
Functions
Block Diagram
Overview
Functions
The LA71206M and LA71207M are video and audio signal processing (Y/C/A) system ICs for NTSC VHS VCRs.
Chip internal trimming is used to make these ICs fully adjustment free.
These ICs significantly reduce the number of peripheral components required, thus providing substantial cost savings in the signal-
processing board.
Video and Audio Signal-Processing IC
Video and Audio Signal-Processing IC
NTSC VHS VCR video signal record and playback processing
VHS VCR audio signal record and playback processing
I
2
C bus serial control
Package: QFP80 (14 14)
The LA71750EM is a video signal-processing system IC that supports the PAL (G, B and I) 4.43 NTSC, MESECAM, and NAP
(G, B, and I) formats for VHS VCRs. Chip internal trimming is used to make this IC fully adjustment free.
This IC significantly reduces the number of peripheral components required, thus providing substantial cost savings in the signal-
processing board.
Additionally, this IC also supports the NAP standard (NTSC to PAL conversion) that is now common in Europe and China.
PAL VHS VCR video signal record and playback processing
VHS VCR audio signal record and playback processing
I
2
C bus serial control
Package: QIP100EJ (14 20)