Sony HCD-GX255, Service Manual, Page: 109 / 138

HCD-GX255/RG170/RG470
5 5
HCD-GX255/RG170/RG470
•
Note For Printed Wiring Boards and Schematic Diagrams
•
Indication of transistor
Note on Schematic Diagram:
•
All capacitors are in
µ
F unless otherwise noted. (p: pF)
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.
•
5
: fusible resistor.
•
C : panel designation.
•
A : B+ Line.
•
B : B– Line.
•
Voltages and waveforms are dc with respect to ground
under no-signal conditions.
– CD Board –
no mark :CD PLAY
– MAIN Board –
no mark : FM
(
) : CD PLAY
〈〈 〉〉
: TAPE PLAY
[ ] : REC
∗
: Impossible to measure
•
Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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 : TUNER (FM/AM)
E
: TAPE PLAY (DECK-A)
d
: TAPE PLAY (DECK-B)
G : REC
J : CD PLAY
f
: AUX IN
N
: MIC
•
Abbreviation
CND : Canadian model
E2
: 120 V AC area in E model
E51 : Chilean and Peruvian models
EE : East European model
RU : Russian model
Note on Printed Wiring Board:
•
X : parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
f : internal component.
•
: 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
(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
pièce por tant le numéro
spécifié.
C
B
These are omitted.
E
Q
B
These are omitted.
C E
Q
– MAIN Board –
3
IC201
u;
(RFACO)
(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
22.8
µ
s
3.3 Vp-p
1
IC201
1
(LRCK),
2
(LRCKI)
(CD play mode)
1 V/DIV, 10
µ
s/DIV
2
IC201
5
(BCK),
6
(BCKI)
(CD play mode)
1 V/DIV, 200 ns/DIV
472 ns
3.3 Vp-p
4
IC201
<z/,
(XTAO)
(CD play mode)
1 V/DIV, 20 ns/DIV
59.4 ns
2.3 Vp-p
ws
IC901
qd
(XOUT (16MHZ))
500 mV/DIV, 20 ns/DIV
62.2 ns
1 Vp-p
wd
Q201 (Collector)
(REC mode)
500 mV/DIV, 10
µ
s/DIV
17.2
µ
s
17.6 Vp-p
wa
IC901
qa
(XCOUT (32.768KHZ))
1 V/DIV, 10
µ
s/DIV
30.6
µ
s
2.8 Vp-p
•
Waveforms
– CD Board –
3. DIAGRAMS