Circuit Boards Location - Sony CDX-GT50W Service Manual

CDX-GT50W/GT500/GT500EE/GT550
Q Q
3 7 6 3 1 5 1 5 0
• 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.
• : internal component.
f
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
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.
piéce portant le numéro
Replace only with part
spécifié.
number specified.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• CD mechanism (1/2) and (2/2) sections
no mark : CD PLAY
• Main (1/3), (2/3), (3/3), Sub and Display sections
no mark : FM
( ) : AM/MW/LW
T E
L 1 3 9 4 2 2 9 6 5 1 3
< > : CD PLAY
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 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 PLAY
F
: FM
f
: AM/MW/LW
L : AUX

3-4. CIRCUIT BOARDS LOCATION

SENSOR board
w w w
KEY board
CDX-GT50W/GT500/GT500EE/GT550
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
EE : East European model
MX : Mexican model
CH : Chinese model
SERVO board
x a o
y
tuner unit
(TU300)
. i
MAIN board
SUB board
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• 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
Q Q
3 7 6 3
16.9344 MHz
0.2 V/DIV, 0.2 µ sec/DIV
— MAIN BOARD —
1
IC350 0 (XTO)
1.2 Vp-p
8.664 MHz
0.5 V/DIV, 0.1 µ sec/DIV
2
IC711 i; (XOUT)
0.8 Vp-p
32.768 kHz
u 1 6 3
0.5 V/DIV, 0.1 µ sec/DIV
.
20 20
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2 4
9 9 8
4
IC2 ia (RFI) 7
IC3 ia (X1)
Approx.
1Vp-p
12 MHz
0.5 V/DIV, 0.2 µ sec/DIV
0.5 V/DIV, 0.5 µ sec/DIV
5
IC2 of (FNI2), og (FNI1)
1.5 Vp-p
0.5 V/DIV, 0.5 µ sec/DIV
6
IC2 oh (FPI2), oj (FPI1)
1.5 Vp-p
1 5 1 5 0 8 9 2 4
0.5 V/DIV, 0.5 µ sec/DIV
— KEY BOARD —
1
3
IC711 is (OSCOUT)
0.9 Vp-p
18.432 MHz
0.5 V/DIV, 0.1 µ sec/DIV 0.5 V/DIV, 0.1 µ sec/DIV
m
c o
2
9 9
1.1 Vp-p
9 8 2 9 9
IC901 qs (X1)
0.9 Vp-p
5 MHz