Read Sony CMT-SP55MD / CMT-SP55TC / ST-SP55 Service Manual online
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.)
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
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
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.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• 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
The components identified by mark
0
or
dotted line with mark
0
are critical for
safety.
Replace only with part number specified.
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
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