Sony HCD-VR50 Service Manual page 25

Q Q
3 7 6 3 1 5 1 5 0
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 / W or less unless otherwise
4
specified.
• : internal component.
¢
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
• 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 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.
T E
F
: FM L 1 3 9 4 2 2 9 6 5 1 3
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.
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : parts mounted on the conductor side.
p
• : Through hole.
®
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
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) parts face are indicated.
w w w
• Indication of transistor
C
.
Q
These are omitted
B C E
B E
These are omitted
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WAVEFORMS
– CD SECTION –
1
1.3Vp-p
IC101 %º RFAC
2
2.5V
APPROX 500mVp-p
IC101 $¡ TE
3
2.5V
APPROX 200mVp-p
IC101 #ª FE
4
2.6Vp-p
7.5µsec
IC101 @∞ MDP
x a o u 1 6 3
y
i
– 33 –
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8 9
– VIDEO SECTION –
1
7
4Vp-p
10MHz
IC502 !£ XOUT
8
2
1Vp-p
H
IC505 &∞ COUT
9
3
2Vp-p
H
IC505 ^ª YOUT
0
4
1Vp-p
H
IC401 7 COUT
!¡
5
2Vp-p
Q Q
3 7 6 3 1 5 1
H
IC401 1 YOUT
6
5.8Vp-p
27MHz
IC509 1 XT1
c o
.
2 4 2
9 8
– MAIN (2/5) SECTION –
1
4.6Vp-p
16MHz
44.1kHz
IC501 !¡ XC-OUT
IC509 !ª LRCK
2
4.8Vp-p
2.11MHz
32.768kHz
IC509 !¶ BCLK
IC501 !£ X-OUT
– PANEL FL SECTION –
4.8Vp-p
1
33.8MHz
IC504 8 384FS
12.5MHz
IC601 &™ X OUT
3.8Vp-p
27MHz
IC504 6 27M
2.8Vp-p
5 0 8 9 2 4 9 8 2
33.8MHz
IC504 !™
m
– 34 –
HCD-VR50/VR70
9 9
5.5Vp-p
5.2Vp-p
3.4Vp-p
9 9