Sony HCD-HP7 - Hi Fi Components, Service Manual

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27 27
HCD-HP7
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
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: 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.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
•
A
: B+ Line.
•
B
: B– Line.
• V oltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
∗
: Impossible to measure
• V oltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• W aveforms are taken with a oscilloscope.
• W aveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER
J
: CD
L
: MD
E : PB (TAPE)
a
: REC (TAPE)
c
: DIGITAL OUT
• A bbreviation
AUS : Australian model.
CND : Canadian model.
E2
: 120 V AC area in E model.
E3 : 220-240 V AC area in E model.
KR : Korean model.
MX : Mexican model.
RU : Russian model.
TH : Thai model.
TW : Taiwan model.
• Indication of transistor
B
These are omitted.
C E
Q
C
B
These are omitted.
E
Q
• Waveforms
– BD Board –
1
IC721
4
(RF)
(CD Play Mode)
1.3 Vp-p
2
IC721
qd
(FE)
(CD Play Mode)
3
IC721
qg
(TE)
(CD Play Mode)
4
IC721
rk
(XOUT)
(CD Play Mode)
180 mVp-p
150 mVp-p
4 Vp-p
200 mV/DIV, 400 ns/DIV
100 mV/DIV, 1 ms/DIV
100 mV/DIV, 1 ms/DIV
1 V/DIV, 20 ns/DIV
59 ns
5
IC601
qd
(XT2)
3.4Vp-p
30.5
µ
s
1V/DIV,
10
µ
s/DIV
1V/DIV,
40 ns/DIV
3Vp-p
6
IC601
qh
(CF2)
125 ns
– PANEL Board –
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
Note:
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
B
These are omitted.
C E
Q
– MAIN Board –
12 Vp-p
13
µ
s
5V/DIV, 4
µ
s/DIV
7
Q207 collector(REC Mode)
B
C
E
These are omitted.