Sony CDX-M620 Service Manual page 37

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 and 1 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• : internal component.
f
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are 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 M ).
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.
• : Through hole.
a
• : 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
qh (RFO)
IC1
4
3.8Vp-p
16.89MHz
IC501 ih (XTAI)
5
2Vp-p
10MHz
IC5 ea (X IN)
37 37
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
ih (EXTAL)
IC702
5
3.5Vp-p
4MHz
4 (XOUT)
IC801