CDX-GT72W/GT720/GT770
CDX-GT72W/GT720/GT770
25
25
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.
•
H
: adjustment for repair.
• 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 PLAY
F
:
FM
f
:
AM
L
:
BUS
g
: AUX
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.)
Note:
The components identi-
fi
ed by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number speci
fi
ed.
Note:
Les composants identi
fi
és
par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spéci
fi
é.
• Waveforms
– MAIN Board –
• Indication of transistor.
C
B
These are omitted.
E
Q
C E
B
These are omitted.
These are omitted.
C B
E
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.
0.7 Vp-p
32.768 kHz
IC303
(XCIN)
1.7 Vp-p
6 MHz
IC303
RE
(XIN)
0.2 V/DIV, 20 sec/DIV
0.5 V/DIV, 0.1 sec/DIV
– DISPLAY Board –
0.4 Vp-p
6.75 MHz
IC901
RE
(XIN)
0.2 V/DIV, 0.1 sec/DIV
