Sony Ericsson CDX-M620 service manual Waveforms Servo Board, Waveforms Main 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: 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