Marantz ST440 - Block Diagram

8. BLOCK DIAGRAM
-
1
75.!1
o-
n
'
FM
,...
L
1 FM RF
300.tl
,...
AMP
~
G
~
AM
~
-
cr==-
-
AM
LOOP ANTENNA
Y
AM RF
AMP
L......------1
AGC
FM
MIXER
FM IF
AMP
FM
DETECTOR
MUTING ~
SEPARATION
LEVEL ~~
ADJ.
FM 1
LOCAL
L--o;.,s~c-.j
1
BUFFER L
AMP ~
1
AM SUB
IF AMP
AM 1 1 AM IF
MIXER jHI--~~~ AMP
Y
FM J- STATION
DETECTOR
AM ~~
STATION
DETECTOR
ADJ.
~
PLL- MPX ...À
STEREO 1 / 1
DECODER
l
POST
J
AMP
STEREO
LED
' 1 MUTING 1
CIRCUIT
L~
L CH
OUTP
fo
R CH
'--
FROM R CH
SIGNAL STRENGTH LED
j SIGNAL ~++~~~~~~~]
L-----~----~ LED ~ ~ ~ ~ ~ 1
1 DRIVER 1
11/30 I/32JI ___ ..,
IPRE. SCALERj
-
_L_ X' TAL
c:::::J
-y- 7.2MHz
-.-
1
BUFFER 1
AMP
'------1~ PLL SYNTHESIZER 1---
CONTROLLER
UT
1
MW
LOCAL
ose
1
L-_Lg;.,rr-'~-L__,
1
ri L. P. F :~-----------__J
LJ D 1 S PL A Y ~t-------,
Î DRIVER 1
CONTROL KEY SWITCH
UP
DOWN
MEMORY c:::::!!::::::.
PRESET 0 0
FM.
MW. LW.
9
-
FM 1 1 1 LI n ~
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