55
56
SANYO TV . VCR
SANYO TV . VCR
LA71730EM
LA70100M
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
1k
Ω
0.01
µ
F
0.01
µ
F
1
µ
F
1
µ
F
0.01
µ
F
0.1
µ
F
0.47
µ
F
0.01
µ
F
0.01
µ
F
0.47
µ
F
2.2
µ
F
2200pF
2200pF
+
+
+
+
+
MODE CTL
MODECTL
H:SECAM
OPEN :AUTO DET
L:EXCEPT SECAM
H : +400n
M :
±
0n
L : -400n
H : +80k
M : 0k
L : +40k
*PB ONLY
4.43MHz
CW
REC-C OUT
REC IN
RP CTL
PB OUT
SECAM HI
C.SYNC IN
PB-C IN
VCC
5V
VCC
5V
MODE
CLK IN
AFC FIL
TER
BGP
DELA
Y
NoConnect
NoConnect
BAL
GND2
GND
TEST
MODE
VCO MONIT
BELL
MONII1
BELL
MONII4
S/H C3
S/H C1
S/H C2
DET
C
SECAM DET OUT
SYNC-IN
SECAM DET SENS
V
CC
V
CC
2
REC-OUT
PB-IN
AGC FIL
TER
FO CTL
REG
2.2
MHz
REC
REC
REC
PB
PB
PB
REC-IN
PB-H
PB-OUT
LIM EXC
to MUTE
to SYNC GATE
to PB AGC
to REC KILLER
to MUTE
Filter Adj.
BELL
PB
CHOROMA
1.1MHz
ANTI BELL
REC
AGC
DET
AGC
AMP
REG
4.0V
REC
MUTE
PB
MUTE
Buf
fer
Buf
fer
Buf
fer
1.1MHz
BPF
4.3MHz
BPF
1.1MHz
BELL
ANTI BELL
4.3MHz
BELL
ANTI BELL
1/4
SYNC
GATE
LIM
4.3MHz
BPF
2.2MHz
TRAP
2.2MHz
TRAP
X2
X2
2.2MHz
BPF
SYNC
GATE
REC
/PB
SECAM
DET
SYNC GATE GEN
/V-SEP
CONTROL
LOGIC
MODE
CTL
AFC
4.43MHz
VCO
4.3MHz BELL
FO CTL
BGR
GEN
+
+
+
+
+
+
+
+
+
+
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
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17
18
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21
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30
79
80
50
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31
82
83
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100
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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
3.58
NTSC
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
ALC
F-TEST
BGP DELAY CTL
4.3MHz BELL FO CTL
Block Diagram
Block Diagram
Overview
Functions
Overview
Functions
Video and Audio Signal-Processing IC
The LA71730EM is a video signal-processing system IC that handles VHS VCR formats other than SECAM. It supports the PAL
(G, B, I, M, and N), NTSC-M, 4.4.3 NTSC, MESECAM, and NAP (G, B, I, M, and N) formats. 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.
VCR SECAM Chrominance
Signal-Processing IC
Integrates all required filters on a single chip
Automatic adjustment of the Bell filter f0 frequency
Built-in SECAM discrimination circuit
Package: MFP30SD (375mil)
The LA70100M is a SECAM VCR chrominance signal processing IC. It integrates bandpass filter, SECAM discrimination, and Bell
filter circuits to significantly reduce the number of peripheral components required and can supports adjustment-free designs.
Multi-format 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)
