Sony CDX-GT50W, CDX-GT500 Waveforms, Servo Board CD Play, KEY Board, Circuit Boards Location

CDX-GT50W/GT500/GT500EE/GT550

• NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

• WAVEFORMS

THIS NOTE IS COMMON FOR PRINTED WIRING

— SERVO BOARD — (CD PLAY)

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 1/4 W or less unless otherwise specified.

•f : internal component.

•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.
cal for safety.	Ne les remplacer que par une
Replace only with part	piéce portant le numéro
number specified.	spécifié.

•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

<	> : 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.

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.)

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

1IC2 5 (FEI)

0 V

Approx. 100 mVp-p

50 mV/DIV, 5 msec/DIV

2IC2 6 (TEI)

0 V

Approx. 400 mVp-p

200 mV/DIV, 5 msec/DIV

3IC2 wd (XI)

0.6 Vp-p

16.9344 MHz

0.2 V/DIV, 0.2 ∝sec/DIV

4 IC2 ia (RFI)	7 IC3 ia (X1)
Approx.
1Vp-p	1.1 Vp-p
	12 MHz
0.5 V/DIV, 0.5 ∝sec/DIV	0.5 V/DIV, 0.2 ∝sec/DIV
5 IC2 of (FNI2), og (FNI1)
1.5 Vp-p
0.5 V/DIV, 0.5 ∝sec/DIV
6 IC2 oh (FPI2), oj (FPI1)
1.5 Vp-p
0.5 V/DIV, 0.5 ∝sec/DIV

	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

•Abbreviation

CND : Canadian model

EE : East European model

MX : Mexican model

CH : Chinese model

— MAIN BOARD —
1 IC350 0 (XTO)	3 IC711 is (OSCOUT)

— KEY BOARD —

1IC901 qs (X1)

3-4. CIRCUIT BOARDS LOCATION

SENSOR board

KEY board

CDX-GT50W/GT500/GT500EE/GT550

SERVO board

tuner unit (TU300)

MAIN board

SUB board

	1.2 Vp-p	0.9 Vp-p
	8.664 MHz	18.432 MHz
	0.5 V/DIV, 0.1 ∝sec/DIV	0.5 V/DIV, 0.1 ∝sec/DIV
	2 IC711 i; (XOUT)
	0.8 Vp-p
	32.768 kHz
	0.5 V/DIV, 0.1 ∝sec/DIV
20	20

0.9 Vp-p

5MHz

0.5V/DIV, 0.1 ∝sec/DIV