Sony HCD-VR50 / HCD-VR50XR / HCD-VR70 / LBT-VR50 / LBT-VR50R Service Manual ▷ View online
HCD-VR50/VR70
– 33 –
– 34 –
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.
• 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.
• 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 produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
g
: VIDEO/MD
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
m
: CHROMA
n
: Y
o
: VIDEO
J
: CD
c
: digital out
• Abbreviation
EA
: Saudi Arabia model.
SP
: Singapore model.
MY
: Malaysia model.
HK
: Hong Kong model.
TW
: Taiwan model.
IA
: Indonesian model.
TH
: Thai model.
IC101
@∞
MDP
1
2
3
4
WAVEFORMS
– CD SECTION –
– CD SECTION –
IC101
%º
RFAC
IC101
$¡
TE
IC101
#ª
FE
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
1.3Vp-p
1
2
3
IC505
&∞
COUT
IC505
^ª
YOUT
4
5
6
7
8
9
IC509
!¶
BCLK
IC509
!ª
LRCK
0
!¡
IC502
!£
XOUT
IC401
7
COUT
IC401
1
YOUT
IC509
1
XT1
IC504
8
384FS
IC504
6
27M
IC504
!™
– VIDEO SECTION –
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
(Side A)
parts face are indicated.
Q
C
These are omitted
E
B
– PANEL FL SECTION –
1
2
IC501
!¡
XC-OUT
IC501
!£
X-OUT
– MAIN (2/5) SECTION –
IC601
&™
X OUT
1
32.768kHz
5.2Vp-p
16MHz
5.5Vp-p
12.5MHz
3.4Vp-p
APPROX 500mVp-p
2.5V
APPROX 200mVp-p
2.5V
2.6Vp-p
7.5
µ
sec
4Vp-p
10MHz
H
1Vp-p
2Vp-p
H
H
1Vp-p
2Vp-p
H
27MHz
5.8Vp-p
4.8Vp-p
2.11MHz
4.6Vp-p
44.1kHz
4.8Vp-p
33.8MHz
2.8Vp-p
33.8MHz
3.8Vp-p
27MHz
HCD-VR50/VR70
– 35 –
– 36 –
7-3. PRINTED WIRING BOARD – BD SECTION –
• See page 18 for Circuit Boards Location.
(Page 44)
HCD-VR50-/VR70
– 37 –
– 38 –
7-4. SCHEMATIC DIAGRAM – BD SECTION –
• See page 32 for Waveforms.
• See page 98 for IC Block Diagrams.
• See page 101 for IC Pin Functions.
• See page 98 for IC Block Diagrams.
• See page 101 for IC Pin Functions.
(Page 45)
HCD-VR50/VR70
– 39 –
– 40 –
7-5. SCHEMATIC DIAGRAM – DECK SECTION –
• See page 98 for IC Block Diagrams.
(Page 59)
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