Read Sony MHC-W555 / STR-W555 Service Manual online
– 21 –
– 22 –
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.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
For printed wiring boards.
Note:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
p
: parts mounted on the conductor side.
•
®
: Through hole.
•
¢
: internal component.
•
b
: Pattern from the side which enables seeing.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• 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 pro-
duction tolerances.
duction tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: AM
L
: AUDIO (AV INPUT)
g
: MD/VIDEO
i
: VIDEO (AV INPUT)
E
: PB (DECK A)
G
: REC (DECK B)
J
: CD
• Abbreviation
EE
: East European model.
EA3
: Saudi Arabia model.
EA4
: Israel model.
EA
: Middle East model. (Saudi Arabia and Israel)
AUS
: Australian model.
SP
: Singapore model.
MY
: Malaysia model.
TW
: Taiwan model.
JE
: Tourist model.
AR
: Argentine model.
TH
: Thai model.
CH
: Chinese model.
WAVEFORMS
1
2
IC1752
!¢
OEC O
IC21
@¢
XOUT
– TUNER SECTION –
(AEP, UK model)
(AEP, UK model)
4.332MHz
2Vp-p
1
IC21
@¢
XOUT
– TUNER SECTION –
(East European, CIS model)
(East European, CIS model)
4.5MHz
4.2Vp-p
1
2
IC501
!£
XT2
IC501
0
X2
– DISPLAY SECTION –
5MHz
5.5Vp-p
4.5MHz
4.2Vp-p
32.768kHz
5Vp-p
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
• Indication of transistor
C
These are omitted
E
B
Q
C
These are omitted
E
B
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