JVC MX-J30 - Page 23

MX-J30/MX-J330/MX-J35R
mw
LA1838(IC1):
FM
AM
IF
AMP&detector,
FM
MPX
Decorder
aes,
ie
0
1. Block Diagram
PILOT
19kK/LS DET
3. Pin Function
FM IN This is an input terminal of FM IF
signal.
AM MIX This is an out put terminal for AM 17
mixer.
FM IF A Bypass of FM IF
MIF fh Input of AM IF Signal.
GN | This is the device ground terminal.
TUNED When the set is tunning,this terminal 21
becomes "L".
STEREO Stereo indicator output. Stereo “L",
Mono: “H"
vec This is the power supply terminal.
FM DET FM detect transformer.
AM SD This is a terminal of AM ceramic filter.
Adjust FM SD sensitivity.
AM VSM Adjust AM SD sensitivity. 27
MUTE _ |I/O| When the signal of IF REQ of IC121(
LC72131) appear, the signal of FM/AM
IF output. //Muting control input.
M Change over the FM/AM input.
“H" :-FM, “L": AM
1
L OUT i Left channel signal output.
R OUT ie Right channel signal output.
LIN Input terminal of the Left channel post
AMP.
>
9
Input terminal of the Right channet
post AMP.
Mpx Right channel signal output
Mpx Left channel signal output.
FM detection output.
AM detection output.
nN w
FM OU
AM DET
+
>
M AG
i?)
This is an AGC voltage input terminal
for AM
G Mpx input terminal
AFC This is an output terminal of voltage
for FM-AFC.
7
=
< n =
i=)
= e)
AM RF AM PF signal input.
Register value between pin 26 and pin28
desides the frequency width of the
input signal.
AM OSC This is a terminal of AM Local
oscillation circuit.
OSC BUFFER
14
MONO/ST
7
=
>
15 Stereo : “H", Mono: "L" AM Local oscillation Signa! output.
2-3