Schematic Diagram - Tu Board - Sony ICF-CDK70 Service Manual

6-4.

SCHEMATIC DIAGRAM - TU Board -

AM FERRITE-ROD
L11 JC12
1µH 0
C32
1000p
R32
100k
C34
0.01
TP
(ANT)
J
POWER
BOARD
CN902
(Page 29)
ICF-CDK70
• See page 30 for Waveforms. • See page 30 for IC Block Diagrams.
L3
D3
C41
KV1520NT
220p
ANTENNA
C42
100p
C43
22p
JC11 R41 C49 R40 C47 C39
CT3
0 10k 0.01 220k 10p 0.1
C37
0.01
R30 C80
22k 0.01
C35 C33 C13 D2
CT1
0.01 0.01 0.01 KV1471E
L2 R31 R33 C30 C31 R24
L1 4.7k 10k 0.01 22p 220
FM
FM
OSC
RF
JC3 0
CV
FM/AM RF AMP,MIX,OSC,
FM/AM IF AMP,DET,MPX
IC1
TA2149BN
R2
470
C1 JC13
47p 0
T1
AM IFT
CF4
JC6
R1 R5 0
470 1k
R3
10k
C10 C18
C8 C4 C11
1 220
1000p 1000p 0.1
50V 10V
L4
AM OSC
CV
R50
TP (CV)
1k
R91
220
C51
22p
R14
1k X1
75KHz
C24 C22 C20
220p R11 0.1 0.1
2.2k
C23
C21
1
1
50V
50V
11
C12
4.7
50V
C61 C62
100p 100p
C9 C7 JC4
10p 5p 0
R92
220
R61
2.2k
T2
FM
IFT
JC33
0
CF2
JC2 0
JC34 0
C15
0.022
C29
C14
100
0.022
10V
21 21
C65
R52 C53 R65 R63
4.7
0 0.22 10k 10k
50V
C54
C52 R51 C56
220
10p 10k 1000p
10V
R54
470
C59 R55 R53 C95 C57
10k
100p 4.7k 1000p 1000p
C55
100p
FM/AM PLL
IC2
LC72137M-TLM
C60
1000p
C63
100p
R94
1k
C66 C68
100p 100p
R60 R59 R58
2.2k 2.2k 2.2k
R10 47 JC1 0
TP
C27 C26
(GND)
100p 100p
ICF-CDK70
TP
(VT)
R4 JC5
10k 0
R56
R13
220
1k
R57
100
L21
10µH CNP1
11P
R-MUTE
R-COUNT
R-CLOCK
B
R-DATA
R-LAT
MAIN
TU-LCH
TU-6V
(Page 22)
TU-RCH
GND
VT
S-GND