Sony CDX-GT40W Service Manual page 20

CDX-GT40W/GT400/GT450/GT450S
• NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1 / W or less unless otherwise
4
specified.
• f : internal component.
• C : panel designation.
Note:
Note:
Les composants identifiés par
The components identi-
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti- pour la sécurité.
Ne les remplacer que par une
cal for safety.
Replace only with part piéce por tant le numéro
number specified. spécifié.
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• CD mechanism section (1/2), (2/2)
no mark : CD PLAY
• Main (1/2), (2/2) and Key sections
no mark : FM/AM
< > : CD PLAY
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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/AM
L : BUS AUDIO
g : AUX
• Abbreviation
CND : Canadian model.
CDX-GT40W/GT400/GT450/GT450S
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : Through hole.
a
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
C
Q
These are omitted
B E
B E C
These are omitted
E C B
These are omitted
• Abbreviation
CND : Canadian model.
• Waveforms
— SERVO Board —
(CD PLAY)
1
IC2 5 (FEI)
0 V
Approx. 100 mVp-p
50 mV/DIV, 5 msec/DIV
2
IC2 6 (TEI)
0 V
Approx. 400 mVp-p
200 mV/DIV, 5 msec/DIV
3
IC2 wd (XI)
0.6 Vp-p
16.9344 MHz
0.2 V/DIV, 0.2 µ sec/DIV
4
IC2 ia (RFI)
Approx.
1Vp-p
0.5 V/DIV, 0.5 µ sec/DIV
20 20
— MAIN Board —
5 1
IC501 i; (XOUT)
IC2 of (FNI2), og (FNI1)
1.5 Vp-p
0.5 V/DIV, 0.5 µ sec/DIV 0.2 V/DIV, 20 µ sec/DIV
6 2
IC2 oh (FPI2), oj (FPI1) IC501 id (OSCOUT)
1.5 Vp-p
0.5 V/DIV, 0.5 µ sec/DIV 0.5 V/DIV, 0.1 µ sec/DIV
7
IC3 ia (X1)
1.1 Vp-p
12 MHz
0.5 V/DIV, 0.2 µ sec/DIV
0.8 Vp-p
32.768 kHz
3.4 Vp-p
18.432 MHz