Sony CMT-SP55TC, Service Manual

Page: 58 / 160

4
SECTION 3
DIAGRAMS
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 diagrams.
Note:
• 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.
•
f
: internal component.
•
C
: panel designation.
For printed wiring boards.
Note:
• 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 layers' patterns are not indicated.)
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• no mark : FM
∗
: Can not be measured.
• 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
J
: CD
d
: TAPE
G
: REC (TAPE/MD)
j
: MD
• Abbreviation
MY : Malaysia model.
SP : Singapore model.
HK : Hong Kong model.
KR : Korea model.
AED : North European model.
• Indication of transistor
C
These are omitted
E B
Q
C
These are omitted
E B
Note:
The components identified by mark
0
or
dotted line with mark
0
are critical for
safety.
Replace only with part number specified.
1
IC701
qa
XCOUT
2
IC701
qd
XOUT
30.5
µ
sec
100nsec
2.7Vp-p
4.6Vp-p
• WAVEFORMS
– MAIN BOARD –
MAIN board
PANEL board
LED board
PIN JACK board
tuner unit (FM/AM)
3-1. CIRCUIT BOARDS LOCATION