Sony CDX-GT480U, Руководство по обслуживанию

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CDX-GT48UM/GT480U/GT480US/GT484US
CDX-GT48UM/GT480U/GT480US/GT484US
17 17
For Schematic Diagrams:
Note:
• All capacitors are in
μ
F unless otherwise noted. (p: pF)
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
speci
fi
ed.
•
f
: internal component.
•
C
: panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
) : AM
< > : CD PLAY
* : Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD
F
: FM
f
: AM
L : AUX
c
: USB
• Abbreviation
MX
: Mexican model
AR : Argentina model
For Printed Wiring Boards:
Note:
•
X
: Parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
a
: Through hole.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Waveforms
– MAIN Board –
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A) Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
Note: The components identi
fi
ed by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number speci
fi
ed.
0.05 Vp-p
4 MHz
0.8 Vp-p
32.768 kHz
0.05 V/DIV, 50 nsec/DIV
0.5 V/DIV, 20 μ sec/DIV
IC001
RI
(XTAL1)
IC401
RE
(X_OUT)
1.7 Vp-p
7.92 MHz
0.5 V/DIV, 50 nsec/DIV
IC401
PE
(OSC_OUT)
• Abbreviation
MX
: Mexican model
AR : Argentina model