Sony ICF-CD2000 Service Manual page 26

• Waveforms
– MAIN Board –
1 IC3 ql (XIN) (Radio ON Mode) 6 IC502 tl (XOUT) (CD Play Mode)
500 mV/DIV, 5 µs/DIV
1 V/DIV, 20 ns/DIV
3.6 Vp-p
1.8 Vp-p
13.3 µ s
59.2 ns
7 IC601 8 (OSC) (CD Play Mode)
2 IC501 7 (TE) (CD Play Mode)
200 mV/DIV, 5 ms/DIV 500 mV/DIV, 5 µs/DIV
Approx.
1.2 Vp-p
360 mVp-p
9.5 µ s
3 IC501 wa (FE) (CD Play Mode)
200 mV/DIV, 20 ms/DIV
8 Q74 (Collector) (Radio ON Mode)
2 V/DIV, 200 ns/DIV
Approx.
560 mVp-p
5.4 Vp-p
4 IC501 ea (OSC) (CD Play Mode)
200 mV/DIV, 10 ms/DIV
386 ns
9 Q74 (Base), Q75 (Collector)
(Radio ON Mode)
200 mV/DIV, 200 ns/DIV
600 mVp-p
670 mVp-p
26.6 ms
5 IC501 rj (RF), IC502 qk (EFMI)
(CD Play Mode)
500 mV/DIV, 500 ns/DIV
384 ns
1.2 Vp-p
– 48 –
• IC Block Diagrams
– LCD Board – – MAIN Board –
IC1 CXA1111N
1 IC401 8 (XT1/P74)
500 mV/DIV, 10 µs/DIV
24 23 22 21 20 19 18
RIPPLE
FILTER
2 Vp-p
BAND SIGNAL
OUTPUT CIRCUIT
FM . IF
DISCRI
30.6 µ s
AM . FE
2 IC401 qs (CF2)
1 V/DIV, 100 ns/DIV
FM . FE
1 2 3 4 5 6 7
3.4 Vp-p
32.9 ns IC3 LC72137M-TLM
CE 1
DI
CCB
CL 3 I/F
DO 4
B01 5
12BITS
PROGRAMMABLE
B02 6
DIVIDER
B03 7
UNLOCK
I01 8
DETECTOR
I02 9
SWALLOW
COUNTER
1/16,1/17
4BITS
UNIVERSAL
COUNTER
IFIN 10
IC2 LA3335M
17 16 15 14 13 10 9 8 7 6
SYNC LAMP
DECODER
REGULATOR
DET TRIGGER
AM . IF
STEREO
DET . AGC
SWITCH
FF 90º FF 1/2 FF 0º
TUNING
METER
PHASE V.C.O VCO STOP
COMPALATE
1 2 3 4 5
8 9 10 11 12
IC404 TC74VHC595FT (EL)
16 15 14 13 12 11
20 XOUT
VCC
XIN
19
REFERENCE
DIVIDER
SHIFT REGISTER
18 AOUT
PHASE
17 AIN
DETECTOR
16 PD
CHARGE
PUMP
15 VSS
LATCH
POWER ON
14 VDD
RESET
13 B04
2 3 4 5 6 7
1
PARALLEL DATA
OUTPUT
1/2 12 FMIN
11 AMIN
– 49 –
IC501 LA9251M-MPB
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50
APC RF DET REF
FIN2 1
VCA
FIN1 2
I/V
E 3
F 4 BAL VCA
TB
5
+ TE
TE– –
6
TE
7
TESI 8
T. SERVO
SCI 9
&T. LOGIC
TH 10
TA 11
TD– 12
TD 13
JP 14
SPINDLE
SERVO
F. SERVO
&F. LOGIC
+
+ –
–
TO 15
NC 16
17 18 19 20 21 22 23 24 25 26
10 9
GND
8
– 50 –
49
–
+
SLC
48 RF–
RF
47
RF AMP
46 GND
45 CLV
44 HFL
43 TES
42 TOFF
41 TGL
40 TJP
39 NC
38 LASER
37 FSTA
LATCH 36 EFBAL
35 SP8
SLED SERVO
+ 34 TGRF
–
SLOF
33
27 28 29 30 31 32