Read Sony HS-JM450 Service Manual online
11
11
HS-JM450
6-1. BLOCK DIAGRAM – TUNER SECTION –
• SIGNAL PATH
: FM
: AM
1
4
8
24
21
23
FM
RF AMP
FM/AM
MIX AMP
FM/AM
OSC
FM
IF AMP
DECODER
AMP
SWITCH
DIVIDER/
VCO
FM
DET
LEVEL
DET
AM
DET
FM
MUTE
AF
BUFFER
AM
IF AMP
PD1
PD2
AM
RF AMP
7
FM-RF
IN
IN
MIX
CF2
10.7MHz
X2
10.7MHz
CF1
455kHz
12
FM
IF IN
IF IN
14
13
L OUT
R OUT
15
16
10
AM
IF IN
IF IN
LP2
BAND
LP1
MO-ST
TUN LED
FM OSC
20
AM OSC
L1
AM
FERRITE BAR
ANTENNA
FM-RF OUT
AM-RF
IN
IN
L2
FM RF
FM/AM RF AMP, FM/AM MIX AMP,
FM/AM OSC, FM/AM IF AMP, DET, MPX
IC1
CT1-2
CV1-2
CV1
TUNING
CT1-1
CV1-1
L3
FM OSC
CT1-3
CV1-3
L4
AM OSC
CT1-4
CV1-4
CT1-3, L3
FM FREQUENCY
COVERAGE
CT1-4, L4
AM FREQUENCY
COVERAGE
CT1-1, L1
AM TRACKING
CT1-2, L2
FM TRACKING
T1
AM IF
B.P.F.
CP1
ANT
TU L, TU R
MAIN Section
(Page 12)
A
MAIN Section
(Page 12)
B
11
ST LED
AGC
TUN
LED
ST
LED
DET-OUT
AF
AMP
MPX-IN
QUAD
18
17
TU VCC
S1 (1/2)
FM ST
MONO
BAND
D1
TU B+
S705
FM
AM
R5
JR3
C2
ANT1
FM
TELESCOPIC
ANTENNA
Ver. 1.2
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