Sanyo EP58B - Manual (Page 26)

LA75665NM/NV
49 50 SANYO TV . VCR SANYO TV . VCR
FM
DET
SAW(P) SAW(S)
INPUT SW
LIM
AMP
1.5k Ω
30k Ω
100k Ω
100k Ω
0.01 µ F
0.01 µ F
1 µ F
+
0.01 µ F
0.01 µ F
100 µ F 0.01 µ F
0.022 µ F
+
330 Ω 330 Ω 330 Ω 330 Ω
560
Ω
150 Ω
150 Ω
330 Ω 2.2k Ω
2.2k Ω
2.2k Ω
1 µ F 0.47 µ F
47 µ F
30pF
8.2 µ H
15 µ H
+
+
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
RF
AGC
VIDEO
DET
1ST SIF
DET
F
VIF 1ST
AMP
AFT VCO
IF
AGC
EQ
AMP
AUDIO
OUT
RFAGC
OUT
AFT
OUT
2.2k Ω
3k Ω
VIDEO
OUT
VCC
0.01 µ F 0.01 µ F
6.5MHz 6.0MHz 5.5MHz 5.5MHz 6.0MHz 6.5MHz 4.5MHz
4.5MHz
C
B
A
LA72648M
10k Ω
1.0k Ω
4.7 µ F
4.7 µ F
0.1 µ F
+
+
+
0.1 µ F
EXT4 IN (R) /AUX
EXT3 IN (R) /SCART2
EXT2 IN (R) /FRONT
EXT1 IN (R) /SCART1
TUNER IN (R) /
MONITOR IN (R)
EXT4 IN (L) /AUX
EXT3 IN (L) /SCART2
EXT2 IN (L) /FRONT
EXT1 IN (L) /SCART1
TUNER IN (L) /
LINE OUT (L)
Normal OUT
Normal IN
1.0k Ω
4.7 µ F
10 µ F
+ 10 µ F
0.1 µ F
+
LINE OUT (R)
TO RF MOD
MONITOR IN (L)
FM audio for PAL
N.C. N.C. N.C. N.C.
10
µ F
0.1
µ F
4.7
µ F
4.7
µ F
0.1 µ F
0.01
µ F
4700P 22
µ F
+
+ + +
+
+ 10 µ F
0.1 µ F 22 µ F
22 µ F
0.01 µ F
10 µ F 0.01 µ F 100 µ F
REC MUTE
0.1 µ F
+
10 µ F
+
+
4.7 µ F 0.01 µ F
+
VCC
HA
0.01 µ F
4700P
PRE GND
+
REC-H
REC-H PB AMP
PB AMP
GND-L
Normal Simulcast
Normal Simulcast
REC-AMP
61
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64
65
66
68
69
70
71
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73
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75
76
77
78
79
80
40
39
38
37
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35
34
33
32
31
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29
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26
25
24
23
22
21
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
470 Ω
2.7k Ω
N.C.
N.C.
VCCL 5V
(P.SAVE 5V)
MONITOR
AF SW
(Setoff in power save modes)
Logic-GND
CLOCK
DATA
VCCL 5V (P.ON 5V)
VCCH 9V (P.ON 9V)
1.0k Ω
4.7 µ F +
DEC OUT (L)
DEC OUT (R)
1.0k Ω
4.7 µ F +
67
VCC
Logic
VCC-R
VCC-L
VCC(5V)
VCC(9V)
GND-R
13dB
13dB
13dB
13dB
A GND
A GND
HiFi "High"
Normal "LOW"
LIM
DEV
VCO
MIX
LPF
LPF
VCO
DEV
COMP
ENV
DET
NOISE
DET
SW
NOISE
L-CH
IN SEL L-CH
PNR
OUT
SEL
SW
NOISE
HOLD
PULSE
LIM
VREF
LIM COMP
DO DET
ALC
MUTE
ALC
SW
ALC
ALC
V / I
SW
ALC
R-CH
BPF
R-CH
PNR
L-CH
BPF
LOGIC
R-CH
IN SEL
7dB
7dB
7dB
7dB
+
Overview
Functions and Features
VIF/SIF Signal-Processing Circuit
Block Diagram
Block Diagram
Overview
Functions
The LA75665NM and LA75665NV are PAL/NTSC multi-system VIF/SIF ICs that adopt a partially adjustment-free circuit structure.
The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the adjustment
process.
PLL detection is adopted in the SIF block to handle audio multipath detection. The SIF input block provides four input systems and
an internal input selection switch. This makes it easier to design products that handle multi-sound systems. Furthermore, this switch
can also be used for video system sound trap switching. In addition, an on-chip buzz canceller suppresses Nyquist buzz for superb
audio quality.
The AFT and SIF require no coils and are adjustment free
PAL/NTSC multiformat audio systems can be implemented easily
Built-in buzz canceller for excellent audio characteristics
Package: LA75665NM: MFP24S (300mil)
LA75665NV: SSOP24 (275mil)
VIF amplifier
PLL detector
BNC
RF AGC
Equalizer amplifier AFT
IF AGC
Buzz canceller First SIF amplifier
First SIF detector
AGC Multi-input selector switch
Limiter amplifier
PLL FM detector
[SIF Block] [First SIF Block] [VIF Block]
PAL Hi-Fi Audio Signal Record
and Playback Processing
The LA72648M is a PAL format system IC that adds a CANAL switch to the Hi-Fi audio signal-processing functions of earlier
devices and aims at even lower power operation in power saving modes.
High fidelity audio signal record and playback processing
Head amplifier for Hi-Fi Audio signal
CANAL switch
Package: QFP80 (14 14)