Circuit Boards Location - Sony WX-4500X Service Manual

6-5. CIRCUIT BOARDS LOCATION

SW board
JOG board
DISPLAY board
CD MAIN board
MOTOR board
MAIN board
29
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : Through hole.
a
• : internal component.
f
• : 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.
Note on 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 / W or less unless otherwise
4
specified.
• % : indicates tolerance.
• f : internal component.
• 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.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
• 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
E
: TAPE
J
: CD
29
WX-4500X
• Waveforms
— CD MECHANISM SECTION —
(MODE : CD PLAY)
1
1.2Vp-p
IC102 8 (ARF)
2
0V
Approx. 180mVp-p
IC102 wd (FEO)
3
0V
Approx. 390mVp-p
w;
IC102 (TEO)
4
5.4Vp-p
1.9µsec
td
IC101 (PCK/DSLB)
5
3.6Vp-p
16.9344MHz
IC101 tk (16M)
6
4.1Vp-p
5MHz
IC103 u; (X1)
• Waveforms
— MAIN SECTION (2/3) —
1
2.1Vp-p
32.768kHz
IC700 uf (X0A)
2
3.9Vp-p
3.58MHz
IC700 os (X0)