Note For Printed Wiring Boards And Schematic Diagrams - Sony CFD-E77L Service Manual

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3 7 6 3 1 5 1 5 0
6-5.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

(In addition to this, the necessary note is printed in each block)
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• W : indicates side identified with part number.
• f : internal component.
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
T E
L 1 3 9 4 2 2 9 6 5 1 3
w w w
.
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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.
• f : internal component.
• 5 : fusible resistor.
• 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.
• H : adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• 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 : MW/LW
E : TAPE PLAY
a : REC
J : CD PLAY
x a o u 1 6 3
y
i
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8 9
• Circuit Boards Location
KEY POWER board
OPR/BATT LED board
JOG board
TC board
Q Q
3 7 6 3 1 5 1
POWER board
LCD board
c o
.
23 23
2 4 2
9 8
TUNER board
KEY VOLUME board
5 0 8 9 2 4 9 8 2
AC INLET board
CD board
BATY A board
BATY B board
m
BACK-UP board
CFD-E77L
9 9
MAIN board
9 9