JVC DR-E34BK - IC105: LA3401 FM MPX Detector; Main Function Descriptions; Top View & Block Diagram; Pin Function Description

DR-E34BK
DR-E34 LBK
■ IC105: LA3401 (FM MPX Detector)
1. The main function description s
(1)
Detect the FM Multiplex Signal ( Stereo signal)_
(2}
When the FM Signal is Stereo Modulation, it will output the signal for in dicator_
(3)
AM/ FM Audio Amplifier.
2. Top View & Block Diagram
vco l.Pf L l'f
r------,
I 11 -oM ONO I
I l•SllJU O I
L.- - - - - -'
PI l. P lot Pil f.1 1
in Oet ll<: t
r-----,
I t-1 -+ 0n J
I L ➔ OH I
L,. ___ ..J
M u le
,n
Mute LED Grio
r-~---+---
1
I
I
I
I
I
I
~ ,---- -~ - 1
13
t- "\
I I
I/
r
I
I
I
I
I
I
L_ -
l 2
AM in FM Jn r,lot
o ut
Lout rost Amp. in.
L R
I S lt l\ E O ➔ L I
I
M O N Q ➔ H I
L _____ ...J
St ereo
Swi lc h
MU1Jng Con tr cl
f' M """" SelacUo,,
v cc on
Mul lny
----1
1-1.,.AM
I
l. ➔ F M
I
____ J
10
R Oul
V ee
f- M! AM
on mute Se l~c.t i on
3. Pin Function Description
Pin No.
Symbol
H/L
1/0 Functio ns and Operations
1 AM in This is an in put termi nal for AM de te ct (oru i gna l.
2 FM in
TI 1is is an input termi n al for FM de t ection signal.
3 Pi lot out
Output of MP X pilot signal {C o nne c te d to Pin 18).
4 Sepa Adj. Separa tfo n a dju s tme nt
5
L. out 0
Left channel signal output.
6 RL 0 Re versal output of Pins.
7 RR 0 Reversal ou t put of Pin8.
8 Rout I 0 Right c han nel signal o utput
9 V ee on mute
The mut i ng ti me af ter p owe r on is contro lled by the conn ect ed ca pacitor.
10 FM /AM
I
I Swi tch - over t he FM / AM I np ut.
" H" : AM, •L " : FM
11 Mute o ut 0
Muting si gnal out put .
12 GND Grou nd 1ermma l.
13 Stereo 0
Stereo indtc.a tor ou tput _ Stereo : "L " . Mono: • H ''
_J
11
Mute
out
14 Mute
The mutin g time at sw it ch--0 ver the FM/ AM is c; f-utn ged
by th e conn ect ed cap ac it or.
15 Mute in
I Muting s1gn11I ,np ut.
•H" : Mu te on,
"L • : M ute off.
16 LPF
L
ow pa ss fi lter of pilo t dete ct or.
1 7
LPF
While th,s te r mi n al go in g
"H", th e V CO stop
18
Pilot in
P
LL inpu t.
19
LPF
Loop fil ter of P ll.
20
LPF
Lo op fil te r o f PLL
21
vco
Vol ta ge c ontroll ed oscilla to r t erm inal.
22
Vee
Pow er iuppl y.
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