Read Sony HT-DDW785 / SA-WP785 Service Manual online
SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
Published by Sony Techno Create Corporation
E Model
Australian Model
ACTIVE SUBWOOFER
9-887-652-03
2009A05-1
© 2009.01
© 2009.01
Ver. 1.2 2009.01
SPECIFICATIONS
SA-WP785
• SA-WP785 is the sub woofer section
in HT-DDW785.
•
Abbreviation
AUS : Australian model
SP
AUS : Australian model
SP
: Singapore model
SP6 : Singapore and Malaysia models
Speaker system
Active subwoofer,
magnetically shielded
Speaker unit
200 mm cone type
Enclosure type
Acoustically loaded bass
reflex
RMS output
190 W
Power requirements
Power consumption 80 W
Dimensions (w/h/d) (Approx.)
270
× 330 × 373 mm
including front panel
Mass (Approx.)
8.3 kg
Area code
Power requirements
AUS
240 V AC, 50Hz
SP, SP6
230 – 240 V AC, 50/60 Hz
Input
LINE IN (input pin jacks)
Design and specifications are subject to
change without notice.
change without notice.
2
SA-WP785
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
0
OR DOTTED LINE
WITH MARK
0
ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350
°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
3
SA-WP785
SECTION 1
DIAGRAMS
Note on Printed Wiring Boards:
•
•
X
: parts extracted from the component side.
•
a
: Through hole.
•
:
Pattern from the side which enables seeing.
• Indication of transistor.
Note on Schematic Diagrams:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and dc with respect to ground under no-signal
conditions.
no mark : Power on
no mark : Power on
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Signal path.
F
: AUDIO
• Abbreviation
AUS
: Australian model
SP
: Singapore model
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
• Circuit Boards Location
B
These are omitted.
C
E
B
These are omitted.
C
E
Q
Note: The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
POWER TRANS board
MAIN board
INPUT CONTROL board
SWITCH board
LED board
4
SA-WP785
•
IC Block Diagrams
– MAIN Board –
IC202, IC203 NJM4565D
A
B
1
A OUTPUT
2
A -INPUT
3
A +INPUT
4
V-
7 B OUTPUT
6 B -INPUT
5 B +INPUT
8 V+
IC500 uPC1237C-A
SWITCH FOR
LATCH/AUTOMATIC
RESET
OUTPUT
OFFSET
DETECTOR
OVERLOAD
DETECTOR
AC-OFF
DETECTOR
FLIP-FLOP
OUTPUT
OFFSET
DETECTOR
OUTPUT
OFFSET
DETECTOR
1
LOADOVER
2
DETECT DC
3
RESET
4
OFF AC
6
DRIVER
RELAY
5
GND
7
OFF AC
8
VCC
