Block Diagram - Tuner Section - Sony CFD-E90 Service Manual

CFD-E90
6-2. BLOCK DIAGRAM – TUNER Section –
ANT1
FM TELESCOPIC
ANTENNA
D10 D11
L1
FM RF
CT1
CT1, L1
FM TRACKING
L3
AM FERRITE-ROD
ANTENNA
CT3, L3
AM TRACKING
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: FM
: AM
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
IC1
FM
RF-IN
FM FM
2
RF AMP MIX
FM
FM
RF-OUT
24 OSC
D1
AM
RF-IN
AM AM
22
RF AMP MIX
D3
BUFFER
(1/2)
AM
BUFFER
CT3
OSC
20 21
L4
AM VCO VOLTAGE FM VCO VOLTAGE
L4
AM OSC
D3
(2/2)
D2
FM/AM PLL
IC2
18
XOUT
20
X1 REFERENCE
75kHz DIVIDER
XIN
19
FM
MIX-OUT CF2 IF-IN
FM IF
4 7
AMP
T1
AM IFT
AM
CF4 IF-IN
AM IF
6
AMP
T1
AM IF
BUFFER
OSC-
OUT
19
L2
L2
FM OSC
+9V
D930
LOW-PASS
FILTER
17 16 12 11
LOW-PASS
FILTER
PHASE
DETECTOR/
CHARGE PUMP
1/2
12 BIT
UNLOCK SWALLOW
PROGRAMMABLE
DETECT COUNTER
DIVIDER
SHIFT REGISTER & LATCH
20 20
T2
FM IFT
T2
FM IF
10
DET- MPX-
FM
OUT IN
AF AF
DET
16 15 MPX
BUFFER AMP
AM
DET
LEVEL
DET
ST
IF
IND
17 18 13 14
10 8 7 13
UNIVERSAL
COUNTER
DI
CL
CCB
CE
INTERFACE
DO
L-CH
L-OUT TU L-OUT
B
12
MUTE
R-OUT (Page 21)
11 R-CH
STEREO/
MONO,
FM/AM
R-MUTE
C
(Page 21)
R-DATA, R-CLOCK,
R-CE, R-COUNT
R-DATA
D
2
R-CLOCK
3
(Page 21)
R-CE
1
R-COUNT
4