Sony SA-WCT800, Service Manual

Page: 17 / 32

SA-WCT800
SA-WCT800
17 17
SECTION 4
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
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.)
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side) 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.
• Indication of transistor.
C
B
These are omitted.
E
Q
For Schematic Diagrams.
Note:
• 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
speci fi ed.
•
f
: Internal component.
•
2
: Non fl ammable resistor.
•
5
: Fusible resistor.
•
C
: Panel designation.
•
A
: B+ Line.
• Voltages and waveforms are dc with respect to ground in
wireless connection to the bar speaker (SA-CT800).
no mark : POWER ON
* : Impossible to measure
• Voltages are taken with VOM (Input impedance 10 M

).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO (ANALOG)
J
: AUDIO (DIGITAL)
Note 1: Among mounted electrical parts on each boards, only
parts that are described in the electrical parts list can
be replaced for repair.
The parts that are not described in the electrical parts
list cannot be replaced with single for repairing.
Note 2: When the complete SUB-MAIN board is replaced, re-
fer to “WIRELESS CONNECTION (LINK) WORK
OF BAR SPEAKER AND SUBWOOFER” and
“SPREADING OF COMPOUND” on page 4.
• Waveforms
– SUB-MAIN Board –
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A) 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.
Note:
The components identi-
fi ed by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number speci
fi ed.
Note:
Les composants identi fi és
par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que par
une pièce portant le nu-
méro spéci
fi é.
Note 1: Among mounted electrical parts on each boards, only
parts that are described in the electrical parts list can
be replaced for repair.
The parts that are not described in the electrical parts
list cannot be replaced with single for repairing.
Note 2: When the complete SUB-MAIN board is replaced, re-
fer to “WIRELESS CONNECTION (LINK) WORK
OF BAR SPEAKER AND SUBWOOFER” and
“SPREADING OF COMPOUND” on page 4.
4
IC7205
1
,
2
1 V/DIV, 50 ns/DIV
82 ns
3.5 Vp-p
20.8
P
s
3.3 Vp-p
2
IC7202
ws
(LRCLK)
2 V/DIV, 10
P
s/DIV
3
IC7202
wd
(SCLK)
1 V/DIV, 200 ns/DIV
328 ns
3.3 Vp-p
1
IC7400
ea
(X1)
1 V/DIV, 100 ns/DIV
250 ns
3.5 Vp-p