Sony CFD-W57 - Cd Radio Cassette-corder, Service Manual

Page: 60 / 74

1
A
B
C
D
E
F
G
H
I
J
2 3 4 5 6 7 8 9 10 11 12
CN703
1 5
L762
LOADING BOARD
S702
(OPEN)
M703
LOADING
MOTOR
S703
(CLOSE)
C777
1-656-254-
L761
M
+
5. PRINTED WIRING BOARD — CD SECTION —
CFD-W57
– 13 – – 14 –
Ref. No. Location
D790 C-5
IC701 G-5
IC702 B-4
IC703 F-8
Q701 E-7
• Semiconductor
Location
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
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
/
4
W or less unless otherwise
specified.
• U : B+ Line.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : CD STOP
• 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.
J
: CD
Note: The components identified by mark
0
or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• Waveforms
(MODE:PLAY)
1
2
3
4
5
Approx. 100mVp-p
IC701
rj (TEI)
2.5V
IC701 ed
(RFO)
1.3±0.5Vp-p
Approx. 200mVp-p
IC701 1
(FEO)
2.5V
IC704 wa (MDP)
2Vp-p
7.6
µ
sec
16.9344MHz
IC704
ua (XTAO)
2.2Vp-p
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