Diagrams - Sony HCD-GX255 Service Manual

3.

DIAGRAMS

• Note For Printed Wiring Boards and Schematic Diagrams
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.
• Indication of transistor
C
Q These are omitted.
B E
Q
B C E
These are omitted.
HCD-GX255/RG170/RG470
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
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.
•
f : internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note: Note:
The components identi- Les composants identifiés par
fied by mark 0 or dotted une marque 0 sont critiques
line with mark 0 are criti-
pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part pièce por tant le numéro
number specified. spécifié.
• 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 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
: 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
• Waveforms
– CD Board –
IC201 1 (LRCK), 2 (LRCKI)
1
(CD play mode)
3.3 Vp-p
22.8 µ s
1 V/DIV, 10 µ s/DIV
IC201 5 (BCK), 6 (BCKI)
2
(CD play mode)
3.3 Vp-p
472 ns
1 V/DIV, 200 ns/DIV
IC201 u; (RFACO)
3
(CD play mode)
0.5 to 1.3 Vp-p
200 mV/DIV, 500 ns/DIV
IC201 <z/, (XTAO)
4
(CD play mode)
2.3 Vp-p
59.4 ns
1 V/DIV, 20 ns/DIV
5 5
HCD-GX255/RG170/RG470
– MAIN Board –
IC901 qa
wa
(XCOUT (32.768KHZ))
2.8 Vp-p
30.6 µ s
1 V/DIV, 10 µ s/DIV
IC901 qd (XOUT (16MHZ))
ws
1 Vp-p
62.2 ns
500 mV/DIV, 20 ns/DIV
Q201 (Collector)
wd
(REC mode)
17.6 Vp-p
17.2 µ s
500 mV/DIV, 10 µ s/DIV