Read Sony ICF-M88B Service Manual online
ICF-M88B
11
11
6-2. SCHEMATIC DIAGRAM – TUNER Section –
•
See page 14 for Waveform.
•
See page 14 for IC Block Diagrams.
R302
C2
R1
D1
R2
C3
C4
C6
C14
C8
C9
D2
L3
R4
C10
C11
C12
D3
R5
R3
R24
R25
C27
C32
C28
C26
C30
R11
C31
CF3
R10
R9
CF1
CF2
C15
C16
C17
C18
C19
C20
C29
R23
D4
C
1
3
R6
R14
C21
C24
C25
C22
C23
Q3
R13
R12
R8
C34
C37
C36
C39
X1
R17
R21
R20
C42
C43
C
4
4
R19
R7
C45
C46
C47
C38
C35
C40
SP1
TP12
TP15
TP8
ANT2
S301
TP13
TP10
CT1
ANT1
L1
CT2
JC4
L2
JC3
JC9
TP9
RV1
IC2
J
C
10
J
C
11
J
C
12
JC5
JC6
Q1
Q2
T1
JC8
IC1
BPF1
4.7
L301
0.1
µH
0.01
10k
SVC347
1M
220p
220p
10p
3p
1000p
1000p
HVU202A
22k
7p
1000p
1000p
HVU202A
100k
100k
100k
100k
10
6.3V
0.022
3p
0.01
1
47
2.2
35V
35V
470
2.2k
0.01
1
4.7
16V
16V
10
6.3V
0.01
0.22
0.01
4.7k
DAN202UT
47
0
0p
10k
10k
10
6.3V
1
1000
6.3V
6.3V
470
4V
1
2SA1576
10k
4.7k
2.2k
L4
47
µH
470
4V
22p
0.01
22p
75KHz
10k
100k
2.2k
0.1
0.22
2
20
0
p
4.7k
2.2k
1
100p
0.01
100p
4700p
100p
(SP OUT)
(AF GND)
(GND)
(FM IN)
(RF GND)
0
0
0
(VT)
50k
LC72122V
0
0
0
0
0
2SC4081
DTC114TUA
0
CXA1019M
CE
DATA
CLK
DOUT
MUTE
BEEP
VDD
GND
MIX
OUT
F.E
GND
FM
ANT
NC
AM
ANT
FM
RF
REG
FM
OSC
AFC
AM
OSC
VOL
NF
DISCRI
GND
GND
OUT
+B
FILTER
IN
OUT
AGC
AGC
GND
METER
NC
IFIN
IFIN
SELECT
BAND
AM
FM
IF
AFC(W) AFC(J)
DET
AF
RIPPLE
AF
X
X
VSSA
A
A
PD
VSSD
VDD
FM
AM
IN
IN
IN
OUT
IN
OUT
CE
DI
CL
DO
BAND
BO2
BO3
IO1
IO2
IN
IF
ANTENNA
LEAD-WIRE
FM
LOCAL
DX
FM SENS
1
3
2
AM
FERRITE-ROD
ANTENNA
AM
OSC
FM
RF
MUTING
VOL
FM/AM PLL
TONE CONTROL
SWITCH
FM/AM BAND
SELECT SWITCH
AM IFT
FM/AM FRONT-END,
FM/AM IF AMP,DET,
AGC,AF AMP
(Page 13)
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