Sony Discman D-E440 - Schematic Diagram

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6-4. SCHEMATIC DIAGRAM
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Refer to page 24 for IC Block Diagrams.
D-E440/E441/E441SR/E443/
E445/E446CK/E449CK
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Waveforms
5
IC301 !§
0.2 Vp-
p
16.9 MHz
VOLT/DIV : 0.1 V AC
TIME/DIV : 50 nsec
6
IC801 @º
0.9 Vp-
p
4.19MHz
VOLT/DIV : 0.2 V AC
TIME/DIV : 0.1 µsec
7
IC501 @£
0.8–1.2 Vp-p
VOLT/DIV : 0.2 V AC
TIME/DIV : 0.5 msec
PLAY MODE
4
IC502 &º
2.6 Vp-p
0.47
µ sec
ESP : OFF
VOLT/DIV : 1 V AC
TIME/DIV : 0.2 msec
3
IC502 ^•
2.6 Vp-
p
22.7 µ sec
ESP : OFF
VOLT/DIV : 1 V AC
TIME/DIV : 10 msec
2
IC502 #§
2.6 Vp-
p
136 µ sec
ESP : OFF
VOLT/DIV : 1 V AC
TIME/DIV : 50 µsec
1
IC502 &ª
SERVICE MODE
during TRK servo OFF
VOLT/DIV : 1 V AC
TIME/DIV : 0.1 msec
2.4 Vp-p
4.2 MHz
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
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 4.5 V 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.
• Voltages and current are taken with a VOM (Input imped-
ance 10 MΩ).
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