Read Sony ICF-M88B Service Manual online
ICF-M88B
14
14
263 ns
1.2 Vp-p
263 ns
1.9 Vp-p
239 ns
2.2 Vp-p
30.5
µ
s
2.5 Vp-p
•
Waveforms
– MAIN Board –
13.3
µ
s
1.1 Vp-p
1 V/DIV, 10
µ
s/DIV
1 V/DIV, 100 ns/DIV
1 V/DIV, 100 ns/DIV
500 mV/DIV, 100 ns/DIV
– KEY Board –
500 mV/DIV, 5
µ
s/DIV
IC101
ua
(XT2)
qs
IC101
ug
(X2)
qd
Q101 (Collector)
qf
Q101 (Base),
Q102 (Collector)
Q102 (Collector)
qa
IC2
w;
(X OUT)
1
•
IC Block Diagrams
– MAIN Board –
IC1
CXA1019M-T6
IC2
LC72122V-TLM-E
FM FE
TUNING METER
AM IF DET AGC
AF POWER AMP
FM IF
FM/AM
IF OUT
FM RF IN
FE GND
NC
AM RF IN
FM RF
FM OSC
REG OUT
AFC
AM OSC
NF
VOL
FM DISCRI
GND
FM/AM BAND
SELECT
FM IF IN
AM IF IN
NC
METER
IF GND
DET OUT
AFC AGC
AFC AGC
AF IN
RIPPLE FILTER
AF OUT
VCC
GND
AM FE
FM
DISCRIMINATOR
14
13
11
9
8
7
2
1
6
5
3
4
15
16
17
18
19
20
21
22
23
24
25
26
27
28
12
10
11
10
9
8
7
6
5
4
3
2
1
12
13
14
15
19
20
UNLOCK
DETECTOR
POWER ON
RESET
UNIVERSAL
COUNTER
CCB
I/F
CE
DI
CL
DO
XOUT
AOUT
XIN
AIN
PD
VSS
VDD
FMIN
AMIN
B01
B02
B03
I01
I02
IFIN
PHASE
DETECTOR
CHARGE
PUMP
REFERENCE
DIVIDER
SWALLOW
COUNTER
1/16,1/17
4BITS
12BITS
PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER
LATCH
1/2
16
17
18 VSSA
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