Block Diagram - Tuner Section - Sony ZS-XN30 Service Manual

5-2. BLOCK DIAGRAM – TUNER Section –
ANT1
FM LEAD WIRE
ANTENNA
FM
RF-IN
2
FM
RF-OUT
L1
24
FM RF
CT1, L1
CT1
FM TRACKING
D1
L3
AM FERRITE-ROD
AM
ANTENNA
RF-IN
22
CT3
D3
(1/2)
CT3, L3
AM TRACKING
AM VCO VOLTAGE
L4
AM
OSC
XOUT
20
X1 REFERENCE
75kHz
• R-ch is omitted due to same as L-ch.
XIN
19
• SIGNAL PATH
: FM
: AM
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
MIX-OUT
FM FM
4
RF AMP MIX
FM
OSC
T1
AM IFT
T1
AM IF
AM AM
RF AMP MIX
OSC
BUFFER
-OUT
19
AM
BUFFER
OSC
20 21
L2
L4
FM VCO VOLTAGE
L2
FM OSC
D3
(2/2)
D2
VT B+
LOW-PASS
FILTER
6 18 17 16
LOW-PASS
FILTER
PHASE
DIVIDER
DETECTOR/
CHARGE PUMP
12 BIT
UNLOCK SWALLOW
PROGRAMMABLE
DETECT
DIVIDER
FM/AM PLL
IC2
T2
FM IFT
T2
FM IF
10
FM
DET
CF2 IF-IN
FM IF FM
7
-OUT
AF
AMP DET
BUFFER
AM
CF4 IF-IN
AM IF AM
6
AMP DET
LEVEL
DET
ST
IF
IND
BUFFER
17 18
12 11 10 8
UNIVERSAL
COUNTER
1/2
COUNTER
SHIFT REGISTER & LATCH
17 17
L-OUT
MPX
-IN
AF
16 15 MPX MUTE
AMP R-OUT
STEREO/
MONO,
FM/AM
13 14
R MUTING
9 7 13
DI R DATA
2
R CLOCK
CL
3
CCB
CE R CE
INTERFACE
1
DO R COUNT
4
ZS-XN30
TU-L
B (Page 18)
12
11 R-CH
R DATA, R CLOCK, R CE,
R COUNT, R MUTING
C
(Page 18)