Sony CD Walkman D-EG7, Руководство по обслуживанию

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D-EG5/EG5CK/EG7
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/ 4 W or less unless otherwise
specified.
•
¢
: internal component.
Note: Note:
The components identi- Les composants identifiés
fied by mark ! or dotted par une marque ! sont cri-
line with mark ! are cri- tiques pour la sécurité.
tical for safety. Ne les remplacer que par
Replace only with part une piéce portant le
number specified. numéro spécifié.
• U : B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 4.5V and fed with regulated dc power
supply from external power voltage jack. (J401)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD
6-4. SCHEMATIC DIAGRAM
r
Refer to page 24 for IC Block Diagrams.
r
Waveforms
1
IC502 &ª
(XPCK)
5
9
2
6
10
3
7
4
8
SERVICE MODE
during TRK servo OFF
VOLT/DIV : 1 V AC
TIME/DIV : 0.2
µ
sec
IC301 !§
(XTLO)
T401
2
IC502
#§
(RFCK)
IC801 @º
(OSC2)
Q402
GATE
IC502 ^•
(LRCK)
IC501 @£
(RFO)
IC502 &º
(BCLK)
T401
4
VOLT/DIV : 1 V AC
TIME/DIV : 50
µ
sec
VOLT/DIV : 1 V AC
TIME/DIV : 10
µ sec
VOLT/DIV : 1 V AC
TIME/DIV : 0.2
µ sec
VOLT/DIV : 1 V AC
TIME/DIV : 50 nsec
VOLT/DIV : 1 V AC
TIME/DIV : 0.2
µ
sec
PLAY MODE
VOLT/DIV : 0.2 V AC
TIME/DIV : 0.5 msec
VOLT/DIV : 1 V AC
TIME/DIV : 2
µ
sec
VOLT/DIV : 2 V AC
TIME/DIV : 2
µ
sec
VOLT/DIV : 2 V AC
TIME/DIV : 2
µ
sec
2.4 Vp-p
4.2 MHz
2.9 Vp-p
136
µ
sec
2.9 Vp-p
22.7
µ
sec
2.5 Vp-p
0.47
µ
sec
2.6 Vp-p
16.9 MHz
3.0 Vp-p
4.19 MHz
0.8–1.2 Vp-p
4.1 Vp-p
5.8
µ
sec
9.0 Vp-p
5.8 µ sec
5.1 Vp-p
5.8 µ sec
11
12
Q401
BASE
IC401
@ª
(VOUT2)
VOLT/DIV : 2 V AC
TIME/DIV : 2
µ
sec
VOLT/DIV : 2 V AC
TIME/DIV : 2
µ
sec
9 Vp-p
5.8 µ sec
5.3 Vp-p
5.8 µ sec