Sony CDX-C8050X - Fm/am Compact Disc Player, Руководство по обслуживанию

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tuner unit
(TUX201)
DISC IN SW board
DSO board
KEY board
SUB (CD) board
LOAD SW board
SERVO board
MAIN board
LIMIT SW board
SUB board
3-5. CIRCUIT BOARDS LOCATION
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.
• U : 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
Ω
).
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
J
: CD
for printed wiring boards:
• X : parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
a : Through hole.
• b : Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
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
(MODE:PLAY)
1
2
3
Approx. 620mVp-p
IC1 qf
(FE)
0V
IC1 qh (RFO)
1.2Vp-p
Approx. 200mVp-p
IC1
qd (TE)
0V
4
5
6
7
8
IC501 uj (LRCK)
IC501 ul (PCMO)
IC501 ia (BCK)
16.89MHz
IC501
ih (XTAI)
10MHz
IC5 ea (X IN)
5Vp-p
5Vp-p
5.7Vp-p
3.8Vp-p
2Vp-p
22.7µsec
474nsec
474nsec