JVC FS-SD9R - Page 34

FS-SD5R/FS-SD7R/FS-SD9R
MI TA2057N (IC1) : FM/AM IF AMP & Detector
1.Block Diagrams
AM
FM MIX AM
IF IN OUT Vstb IF IN QUAD FMOUT AMOUT MPXIN-~ LPF1 LPF 2 VCO L OUT
—(24)
3
&
(14)
13
REG
: DIVIDE
IF
r
pecone|
MUTE
4 A
AM/FM
MONO
SW
a a rea
MIX a 5 FD
t =
1
@-—©®)
©
©
~©)
1)
—
AM
AM
FM
AM
AM
Vcc
AGC
GND
IFOUT
TUN
ST
R
OUT
RFIN S.SENS S.SENS OSC OSC /REQ LED LED
OUT
2.Pin Function
Pin ; ;
No.
|
I/O
Symbol
Function
Symbol
Function
1 | AM RF AMPF signal input Lch OUT Output Lch
3
FM
S.SENS
15
LPF2
When
voltage
of
terminal
is
MONO
4 : AM OSC AM local oscillation circuit at"H" and ST at "L"
5 | O IAMOSC OUT| AM local oscillation signal output 16 LPF1 When voltage of terminal is AM at
6 = VCC Power supply "H" and FM at "L"
7 | AGC AGC voltage input terminal 17 MPX IN Multi plex signal input
8
|
GND
Connect
to
GND
18
AM
OUT
aE
detection
signal
output
9/0 ae IF OUT IF REQ signal output to IC2 19 FM OUT FM detection signal output
10/0 TU IND Indicator drive output when tuning | 20 FM QUAD | Bypass to FMIF
11 To ST IND Stereo indicator output 24 AM IF IN Input of AMIF signal
I "H"mono . "L"stereo 29 Vst Fixed voltage output terminal
12/10
Rch
OUT
Output
Reh
23
AM
MIX
OUT
|
Output
terminal
for
AM
mixer
24 FM IF IN Input of FMIF signal
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