Sony Ericsson CDX-CA860X, CDX-CA850X service manual Key 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 0or dotted	une marque 0sont critiques
line with mark 0are 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

J : CD

for printed wiring boards:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

•x : 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.

• Waveforms

— Servo Board —

(MODE: CD PLAY)

1
	0V
Approx. 200mVp-p
IC1	qd (TE)
2
	0V
Approx. 620mVp-p
IC1	qf (FE)
3
	1.2Vp-p
IC1 qh (RFO)
4
	1.4Vp-p
	16MHz
IC501 ih (XTAI)
5
	4.2Vp-p
	10MHz
IC5	ea (X IN)

— Key Board —

1

4.6Vp-p

4MHz

IC903 4 (XOUT)

CDX-CA850/CA850X/CA860X

— Main Board —

1

5Vp-p

4.332MHz

IC201 4 (OSCD)

2

5.1Vp-p

32.768kHz

IC501 uf (X0A)

3

2.2Vp-p

3.68MHz

IC501 os (XO)

4

1.6Vp-p

18.432MHz

IC701 ih (EXTAL)

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