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ICF-M88B - S2 Sports Bicycle Radio
Service manual
Sony ICF-M88B Service Manual page 14
Fm/am pll synthesized radio
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Also See for ICF-M88B
:
Operating instructions
(2 pages)
,
Specifications
(2 pages)
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ICF-M88B
• Waveforms
– MAIN Board –
– KEY Board –
IC2 w; (X OUT)
IC101 ua (XT2)
1
qa
1.1 Vp-p
13.3 µ s
500 mV/DIV, 5 µ s/DIV
IC101 ug (X2)
qs
Q101 (Collector)
qd
Q101 (Base),
qf
Q102 (Collector)
500 mV/DIV, 100 ns/DIV
2.5 Vp-p
30.5 µ s
1 V/DIV, 10 µ s/DIV
2.2 Vp-p
239 ns
1 V/DIV, 100 ns/DIV
1.9 Vp-p
263 ns
1 V/DIV, 100 ns/DIV
1.2 Vp-p
263 ns
• IC Block Diagrams
– MAIN Board –
IC1 CXA1019M-T6
14
13
12
11
10
9
8
7
FM FE
FM
DISCRIMINATOR
FM IF
AM FE
TUNING METER
AM IF DET AGC
15
17
18
19
20
21
22
16
IC2 LC72122V-TLM-E
CE
1
DI
CCB
CL
I/F
3
DO
4
REFERENCE
DIVIDER
B01
5
PHASE
12BITS
DETECTOR
PROGRAMMABLE
6
B02
CHARGE
DIVIDER
PUMP
B03
7
UNLOCK
8
I01
DETECTOR
POWER ON
I02
9
SWALLOW
COUNTER
1/2
1/16,1/17
4BITS
UNIVERSAL
COUNTER
IFIN
10
14
14
6
5
4
3
2
1
AF POWER AMP
28
23
24
25
26
27
20
XOUT
19
XIN
18 VSSA
17
AOUT
16
AIN
PD
15
14
VSS
13
VDD
RESET
FMIN
12
11
AMIN
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