Sony CDX-M800 service manual Circuit Boards Location, Waveforms Servo Board, Waveforms Main Board

CDX-M800

4-5. CIRCUIT BOARDS LOCATION

	IN SELF SW board	SL SW board
SWITCH board		SERVO board

LOAD SW board	tuner unit
	(TUX501)
	MAIN board
	DISPLAY board
	SUB board

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 diagram:

•All capacitors are in µF unless otherwise noted. pF: µµF 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.

•% : indicates tolerance.

•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.

•Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords.

•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.

F: FM

f: AM/MW/LW

• Waveforms

— Servo Board —

(MODE: CD PLAY)

1
	2Vp-p
16.9344MHz
IC1	wd (XTAL)
2
	5Vp-p
	3.2msec
IC1	ts (PACK)
3
	1.2Vp-p
IC1 uj (RFO)
4
	0V
Approx. 100mVp-p
IC1 oa (FEO)
5
	0V
Approx. 100mVp-p
IC1 od (TEO)

•Waveforms

— Main Board —

(MODE: FM)

1

3.2Vp-p

4.3MHz

IC502 4 (OSCD)

2

1.8Vp-p

32.768kHz

IC303 9 (XOUT)

3

3.6Vp-p

6MHz

IC303 qa (OSCOUT)

• Waveform

— Display Board —

(MODE: FM)

1

1.5Vp-p

30MHz

IC2 qa (XOUT)

J : CD

•Abbreviation

CND : Canadian model

for printed wiring boards:

•X : parts extracted from the component side.

•Y : parts extracted from the conductor side.

• : parts mounted on the conductor side.

•a : Through hole.

•: Pattern from the side which enables seeing. (The other layer’s 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.

•Abbreviation

CND : Canadian model

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