Diagrams; Circuit Boards Location - Sony HCD-GSX75 Service Manual

HCD-GSX75
7-1.

Circuit Boards Location

DISPLAY board
KEY board
GAME board
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 µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
1
• All resistors are in Ω and
specified.
• : internal component.
f
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
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.
• 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 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
22
SECTION 7

DIAGRAMS

CD LED board
KEY(2) board
/ W or less unless otherwise
4
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.
CD board
AMP board
D-SENSOR (OUT) board
LT MOTOR board
D-SENSOR (IN) board
T-SENSOR board
H/P board
• 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
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: internal component.
f
• : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
(Conductor B)
Parts face side:
(Component A)
• Indication of transistor
C
Q These are omitted.
B E
B C E
TUNER board
SPK board
POWER board
MAIN board
LOAD SW board
Parts on the pattern face side seen from
the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
These are omitted.