Sony HCD-VX90AV Service Manual page 25

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.
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.
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.
• Indication of transistor
C
Q
These are omitted
B C E
B E
These are omitted
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
– 31 –
– VIDEO SECTION –
1
7
4Vp-p
10MHz
44.1kHz
IC502 !£ XOUT
IC509 !ª LRCK
8
2
1Vp-p
2.11MHz
H
IC509 !¶ BCLK
IC505 &∞ COUT
9
3
2Vp-p
H
33.8MHz
IC505 ^ª YOUT
IC504 8 384FS
0
4
1Vp-p
H 27MHz
IC504 6 27M
IC401 7 COUT
5 !¡
2Vp-p
H 33.8MHz
IC401 1 YOUT IC504 !™
6
5.8Vp-p
27MHz
IC509 1 XT1
HCD-VX90AV
– MAIN (3/4) SECTION –
1
5.2Vp-p
4.6Vp-p
32.768kHz
IC501 !¡ XC-OUT
2
4.8Vp-p 5.5Vp-p
16MHz
IC501 !£ X-OUT
– PANEL (2/3) SECTION –
4.8Vp-p
1
3.4Vp-p
12.5MHz
IC601 &™ X OUT
3.8Vp-p
2.8Vp-p
– 32 –