JVC DR-E34BK - LA1266 A (IC104) FM AM IF AMP & Detector; Main Function Descriptions; Top View and Block Diagram; Pin Function Description

II LA1266A(IC104) : FM AM IF AMP&detector
1. The main function descriptions
(1) Amplify and Jetect of FM intermodulation frequencies.
DR- E34 BK
DR -E34 LBK
(2) It has local oscillator and mixer for AM, and amplify the AM-IF signal.
2. Top View
3. Block Diagram
AM AM AM
..... Mis IF IF STRQ
FM
If
FM
~In By pn .> s
FM-In
I
24
AM,OSC ou t r..lill. 18 __ E:!) _
-----~---~
~~FM out
Bypau 2 23 AM-OSC
Bypass
3
n
v .ref
GNO
4
21
AM-In
fM-OET
5
20
AM-Mix
FM-OH
6
19
/\M -AGC
VC(
7 18
AM-If
Tuned
8 17
i\M Adj.
FM-AFC
9
16 FM Ad)
FM-IF
10
1S AM out
AM-IF
II 14 NAR SM
FM-out
12
13
srno
I
I
I
L
AM
, In
If B uff~
5 -Me t er
0and wid th
-----,.i.--- - --
~ 14
AM•OSe I\M ,OSC NAR AGC
In
out SM
~m fM AFC
I
i-------~ §1\M ou t
I
I
I
I
I
I
!I)1uned INO.
:
NOSlg.-H
------~- _ .J Slg ... L
AM FM GNO
Adj
Adj
4. Pin Function Description
Pin
No.
Symbol 1/0
Functions and Operatio :i s
1 FM in
I This
is an input terminal of FM IF Si gnal.
2.3 Bypass Bypass of FM IF Amp .
4
GND
This
is the device ground terminal.
5,6 FMDET FM detect transformer.
7
Vee
This. is th e power supp ly terminal.
8 Tuned N ot used.
9
I
FM AFC 0 This is an output terminal of voltage for FM -AFC.
10 FM IF out 0 When the signal of IF REQ of 1(102( LC7218) applied to pi n 17, the signal of FM IF does outp ut .
1
I AM IF out
0
When the signal of IF REQ of IC102(LC7218) applied to p in17, the s ig nal of AM IF does output .
12 FM out
0
FM detection output.
13
STRQ
I The IF -signals come out from pin10 (FM-IF) or pin11 ( AM -I F) whi le th is terminal go in g to " High- .
14 NARSM Contn:>I the Band- widt h of signal meter .
15 AM out 0
AM de te ct ion output .
16
FMAdj
For adj ust the st op level (or mute level) of FM.
17 AMAdj For adjust the stop level (or mute level) of AM .
18
AM - IF I
In
put of AM IF Si gnal.
19 , AM-AGC
I This is an AGC
voltage Input term ina l for AM.
20
AM-MIX
0
T hi s is an output terminal for AM m ix er .
21 AM-IN I
This is an input te rmina l for AM RF Signal.
22 V.
REF
23 AM·OSC
This is a
terminal of AM Local oscillat ion drcuit.
24
AM-OSC
0
AM Local Oscilla tion Si gnal output .
out
{No . 20 16 2) i - 21
www.audiodna.sk