Sony Ericsson CDX-M620 • Waveforms — Servo Board, •Waveforms — Main Board, Mode: Cd Play

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: The components identified by mark 0or dotted line with mark 0are critical for safety.

Replace only with part number specified.

•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

J : CD

for printed wiring boards:

•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 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
	3.8Vp-p
16.89MHz
IC501 ih (XTAI)
5
	2Vp-p
	10MHz
IC5	ea (X IN)

CDX-M620/M670

•Waveforms

— Main Board —

(MODE: FM)

1

3.8Vp-p

4.332MHz

IC202 4 (OSCD)

2

5.4Vp-p

32.768kHz

IC501 uf (XOA)

3

2.6Vp-p

3.68MHz

IC501 os (XO)

4

3.8Vp-p

18.432MHz

IC702 ih (EXTAL)

5

3.5Vp-p

4MHz

IC801 4 (XOUT)

37 37