Block Diagram - Tuner Section - Sony ICF-DVD57TV Service Manual

6-2. BLOCK DIAGRAM – TUNER Section –
FM/AM RF AMP, MIX, OSC,
FM/AM IF AMP, DET, MPX
FM
ANT RF IN
(Page 26)
C 2
CT1, L1
FM
FM TRACKING
RF OUT
L1
24
FM RF
CT1
D1
L3
AM FERRITE-ROD
ANTENNA
AM
RF IN
22
D3
CT3
(1/2)
CT3, L3
AM TRACKING
L4
AM VCO VOLTAGE
L4
AM OSC
FM/AM PLL
IC2
XOUT
20
X1 REFERENCE
75kHz DIVIDER
XIN
19
ICF-DVD57TV
IC1
MIX OUT CF2
FM FM
4
RF AMP MIX
FM
OSC
T1
AM IFT
CF4
T1
AM IF
AM AM
RF AMP MIX
OSC
BUFFER
OUT
19
AM
BUFFER
OSC
20 21
L2
FM VCO VOLTAGE
L2
FM OSC
D3
(2/2)
D2
VT B+
LOW-PASS
FILTER
6 18 17 16
LOW-PASS
FILTER
PHASE
DETECTOR/
CHARGE PUMP
12 BIT
UNLOCK SWALLOW
PROGRAMMABLE
DETECT COUNTER
DIVIDER
T2
FM IFT
T2
FM IF
10
FM
DET
IF IN
FM IF FM
7
OUT
AF
AMP DET
16
BUFFER
AM
IF IN
AM IF AM
6
AMP DET
LEVEL
DET
ST
IF
IND
BUFFER
17 18
12 11 10 8 9 7
UNIVERSAL
COUNTER
1/2
SHIFT REGISTER & LATCH
23 23
L-OUT
MPX
12
IN
AF
15 MPX MUTE
AMP R-OUT
11 R-CH
STEREO/
MONO,
FM/AM
13 14
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: FM
: AM
PLL DATA, PLL CLK,
MUTE
13
DI PLL DATA
2
PLL CLK
CL
3
CCB
CE PLL CE
INTERFACE
1
DO
4
ICF-DVD57TV
TU LCH
D (Page 24)
PLL CE, MUTE
E
(Page 24)