Read Sony HCD-WZ7AV Service Manual online
17
17
HCD-WZ7AV
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
5
: fusible resistor.
•
C
: panel designation.
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
• b
: Pattern from the side which enables seeing.
•
A
: B+ Line.
•
B
: B– Line.
• Power voltage is DC 4V, 9V and fed with DXA-WZ7AV
from external connector (SYSTEM CONTROL 1).
• 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.
F
: AUDIO
E
: PB (TAPE)
a
: REC (TAPE)
J
: CD
L
: VIDEO
h
: MD
d
: TUNER
O
: MIC
• Abbreviation
EA
: Saudi Arabian model
SP
: Singapore E model
TH
: Thai model
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(SIDE B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(SIDE A)
the parts face are indicated.
• Indication of transistor.
B
These are omitted.
C
E
Q
5
IC505
qg
(XTAO)
6
IC505
w;
(CLKA)
1.1 Vp-p
33.8688 MHz
0.6 Vp-p
29 MHz
– VMP Board –
• Waveforms
1
IC103
qg
(RFAC)
(PLAY mode)
2
IC103
qh
(FE)
(PLAY mode)
1.05
±
0.3 Vp-p
4
IC103
wk
(RFDC)
(PLAY mode)
0.75
±
0.1 Vp-p
Approx.
250 mVp-p
250 mVp-p
Approx.
350 mVp-p
350 mVp-p
3
IC103
qk
(TE)
(PLAY mode)
– BD Board –
7
IC401
qa
(XC-OUT)
8
IC401
qd
(X-OUT)
3.1 Vp-p
1 V/DIV, 10
µ
s/DIV
62.5 ns
2.9 Vp-p
1 V/DIV, 20 ns/DIV
30.5
µ
s
– MAIN Board –
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