Sony CD Walkman D-E551, Service Manual

Page: 26 / 44

– 48 – – 49 – – 50 –
• Waveforms
– MAIN Board –
1 IC3 ql (XIN) (Radio ON Mode)
500 mV/DIV, 5 µs/DIV
2 IC501 7 (TE) (CD Play Mode)
200 mV/DIV, 5 ms/DIV
3 IC501 wa (FE) (CD Play Mode)
200 mV/DIV, 20 ms/DIV
4
IC501
ea
(OSC) (CD Play Mode)
200 mV/DIV, 10 ms/DIV
6 IC502 tl (XOUT) (CD Play Mode)
1 V/DIV, 20 ns/DIV
7 IC601 8 (OSC) (CD Play Mode)
500 mV/DIV, 5 µs/DIV
5 IC501 rj (RF), IC502 qk (EFMI)
(CD Play Mode)
500 mV/DIV, 500 ns/DIV
8 Q74 (Collector) (Radio ON Mode)
2 V/DIV, 200 ns/DIV
– LCD Board –
1 IC401 8 (XT1/P74)
500 mV/DIV, 10 µs/DIV
1.8 Vp-p
13.3
µ
s
Approx.
360 mVp-p
Approx.
560 mVp-p
600 mVp-p
26.6 ms
1.2 Vp-p
3.6 Vp-p
59.2 ns
1.2 Vp-p
9.5
µ
s
5.4 Vp-p
386 ns
9 Q74 (Base), Q75 (Collector)
(Radio ON Mode)
200 mV/DIV, 200 ns/DIV
670 mVp-p
384 ns
2 Vp-p
30.6
µ
s
2 IC401 qs (CF2)
1 V/DIV, 100 ns/DIV
3.4 Vp-p
32.9 ns
• IC Block Diagrams
– MAIN Board –
IC1 CXA1111N
24 23 22 21 20 19 18 17 16 15 14 13
1 2 3 4 5 6 7 8 9 10 11 12
FM.IF
DISCRI
TUNING
METER
RIPPLE
FILTER
AM.IF
DET.AGC
BAND SIGNAL
OUTPUT CIRCUIT
REGULATOR
FM.FE
AM.FE
BAND
AM IF FM IF TUNE EARTH IF AFCW AFCJ
DET FILTER VCC MUTE
MIX OUT
EARTH
FM IN
NC
AM RF FM RF
REG
FM OSC
AFC
AM OSC
DISCRI EARTH
IC2 LA3335M
FF 0º
1 2 3 4 5
6 7 8 9 10
FF 1/2 FF 90º
V.C.O VCO STOP
SYNC
DET
STEREO
SWITCH
PHASE
COMPALATE
LAMP
TRIGGER
DECODER
IN
FILTER
VCC VCO
NC
GND STLED M/ST L R
IC3 LC72137M-TLM
11
10
9
8
7
6
5
4
3
2
1
12
13
14
15
16
19
20
UNLOCK
DETECTOR
POWER ON
RESET
UNIVERSAL
COUNTER
CCB
I/F
CE
DI
CL
DO
XOUT
AOUT
XIN
AIN
PD
VSS
VDD
B04
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
17
18
IC404 TC74VHC595FT (EL)
1
2 3 4 5 6 7 8
9 10 16 15 14 13 12 11
SHIFT REGISTER
LATCH
PARALLEL DATA
OUTPUT
GND
VCC
LATCH CLOCK PARALLEL DATA OUTPUT SERIAL DATA INPUT OUTPUT ENABLE SHIFT CLOCK SERIAL DATA OUTPUT RESET
QB QC QD QE
QF
QG QH
SQH
A
QA
IC501 LA9251M-MPB
+
–
+ –
+ –
+
–
+
–
+ –
+
–
+
–
1
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
2
3
4
5
6
7
8
9
10
11
12
13
14
16
I/V
BAL VCA
VCA
APC REF RF DET
SLC
48
46
45
44
43
42
41
40
39
38
37
36
34
33
+ –
47
RF AMP
+ –
+ –
15
T. SERVO
&T. LOGIC
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
F. SERVO
&F. LOGIC
SPINDLE
SERVO
SLED SERVO
35
LATCH
TE
FIN2
FIN1
E
F
TB
TE–
TE
TESI
SCI
TH
TA
TD–
TD
JP
TO
NC
FD
FD–
FA
FA
–
FE
FE–
SP
SPG
SP–
SPD
SLEQ
SLD SL– SL+
OSC
NC
SLOF
TGRF
SP8
EFBAL
FSTA
LASER
NC
TJP
TGL
TOFF
TES
HFL
CLV
GND
RF
RF–
SLC SLI DEF DRF FSC TBC FSS VCC REFI VR LF2 PH1 BH1 LDD LDS NC