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RX-MXG9BK
M LA1266A(1C104): FM AM IF AMP & detector
1. The main function descriptions
(1).
Amplify and detect of FM intermodulation frequencies.
(2)
it has local oscillator and mixer for AM, and amplify the AM-IF signal.
2. Terminal Layout
3. Block Diagram
AM AM
AM
FM
FM
Mix
IF
IF
STRQ
IF
-in
Bypass
FM-DET
Vee
13
2
7
FM-IF | 1
AM-OSC OUT
Eel Fal _ fo
emer (eee
ORE
Be
eee U.
I
1
BYPASS | 2
AM-OSC
H
1
i
I
|
BYPASS | 3
V-REF
I
IF Buffer
IF Buffer
Po rwar
} a0 |
FM out
GND | 4
AM-IN
FM-DET | 5
AM-MIX
\
19 |em Arc
FM-DET | 6
AM-AGC
|
peek
fa
Veo | 7
AM-IF
ie ANE out
sig | 8
AM ADJ.
I
i
FM-AFC | 9
FM ADJ
;
AGC
FM-IF | 10
AM OUT
!
!
1
LED
1
AM-IF | 11
NAR S.M
iriver
re] ste
FM-OUT | 12
STRQ
;
I
I
'
Ls
1
NOSig.oH
+2 ae
phe
Sig.»L
17|
{16
AM
AM-OSC
AM-OSC
NAR
AGC
AM
FM
GND
-in
in
out
SM
Adj
Adj
4. Pin Functions
| FMIN | 1 | This is an input terminal of FM IF signal.
| Bypass | - | Bypass of FM IF amp.
Teuo [= | this the deve ground terminal
——SSSCSC~—CSCSCSY
This is the power supply terminal
SIG
| sig
| 0 | When the machine is tunning ,this terminal becomes "L".
FM AFC
0 | This is an output terminal of voltage for FM-AFC(Auto frequency control).
2
ro
i
Fans [=| conirl the tandowidth of signal
meter
ro
a
iz
1
3
7
11
12
13
14
Taw [1 [input ofAM
sgn,
15
16
17
Pameaee |]
Fanraaix [0 | this san output terminal for AM mi
———SSSSSCSCSSCSCSCSCSCSCC*S
Fawn [1 | this san input terminal for AM RF signal
———S=CSCsC~'"'"S*"'"C"*'"*'"~*~*
Tviner | — | Resistor value between pind and pina desdes the Frequency width ofthe Input signal |
o s e [=
19
20
21
22
|
23
This is a terminal of AM Local oscillation circuit
24
AM-OSC
O
AM Local Oscillation Signal output.
UT
This is an AGC voltage input terminal for AM
1-46 (No.20434)
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