Sony HCD-GX255, Руководство по обслуживанию, Страница: 25 / 138

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HCD-GX255/RG170/RG470
HCD-GX255/RG170/RG470
•
Circuit Boards Location
•
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/BD Section –
no mark :CD PLAY
– CD-G Section –
no mark : CD-G PLAY
– Other Sections –
no mark : FM
(
) : CD PLAY
〈〈 〉〉
: TAPE PLAY
[ ] : TAPE 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
L : VIDEO
•
Abbreviation
AR
: Argentina model
AUS : Australian model
CND : Canadian model
E2
: 120 V AC Area in E model
E3 : 240 V AC Area in E model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
EE : East European model
MX : Mexican 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.
Caution:
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.
C
B
These are omitted.
E
Q
B
These are omitted.
C E
Q
BD board (MX)/
CD board (EXCEPT MX)
CD-G board (MX)
SW board
MOTOR (LD) board
SENSOR board
DRIVER board
MOTOR (TB) board
MIC board
(E2, E51, AR, MX)
VIDEO OUT board (MX)
SUB TRANS board
AC1 board
(GX255/RG170/RG470: AEP, EE, RU)
TRANSFORMER board
PANEL board
VOL board
AUDIO IN board
HEADPHONE board
MAIN board
POWER board
MAIN board