![background image](http://html.mh-extra.com/html/sony/hcd-gsx75-system-components/hcd-gsx75-system-components_service-manual_420742022.webp)
22
HCD-GSX75
SECTION 7
DIAGRAMS
7-1.
Circuit Boards Location
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.
•
5
: 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.
(The other layers' patterns are not indicated.)
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
CD board section
no mark : CD PLAY
Other board section
no mark : FM
(
) : TAPE PLAY
<
> : TAPE REC
[
] : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Indication of transistor
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.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
J
: CD
c
: DIGITAL OUT
E
: TAPE (PB)
a
: TAPE (REC)
j
: AUDIO IN
k
: VIDEO IN
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component A)
the parts face are indicated.
B
These are omitted.
C
E
C
B
These are omitted.
E
Q
MAIN board
AMP board
POWER board
TUNER board
D-SENSOR (OUT) board
T-SENSOR board
D-SENSOR (IN) board
LT MOTOR board
LOAD SW board
CD LED board
CD board
DISPLAY board
GAME board
SPK board
H/P board
KEY board
KEY(2) board