Sony SAWP-890 Service manual
SA-WP890
SERVICE MANUAL
Ver. 1.0 2007.01
• SA-WP890 is the sub woofer section
in HT-DDW890.
SPECIFICATIONS
Speaker system Active subwoofer,
magnetically shielded
Speaker unit 200 mm cone type
Enclosure type Acoustically loaded bass
reflex
RMS output 190 W
Input LINE IN (input pin jacks)
AEP Model
UK Model
Power requirements
Area code Power requirements
AEP, UK 230 V AC, 50/60 Hz
Power consumption
Area code Power consumption
AEP, UK 80 W
Dimensions (width/height/depth) (Approx.)
270 × 331 × 380 mm
Mass (Approx.) 8.3 kg
Design and specifications are subject to
change without notice.
ACTIVE SUBWOOFER
9-887-518-01
2007A16-1
© 2007.01
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
SA-WP890
TABLE OF CONTENTS
1. DIAGRAMS
1-1. Block Diagram ................................................................ 5
1-2. Printed Wiring Boards — MAIN Section — ................. 6
1-3. Schematic Diagram — MAIN Section —...................... 7
1-4. Printed Wiring Boards — POWER Section — .............. 8
1-5. Schematic Diagram — POWER Section — .................. 8
2. EXPLODED VIEWS
2-1. Overall Section ................................................................ 9
3. ELECTRICAL PARTS LIST .................................. 10
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.
2
SECTION 1
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
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.
C
B
B
Q
B
E
CE
Q
CE
These are omitted.
These are omitted.
These are omitted.
Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• All resistors are in Ω and 1/
specified.
• C : panel designation.
Note: The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• B : B– Line.
•Voltages and dc with respect to ground under no-signal
conditions.
no mark : Power on
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Signal path.
F : AUDIO
4
W or less unless otherwise
SA-WP890
• Circuit Boards Location
INPUT CONTROL board
SWITCH board
MAIN board
LED board
POWER TRANS board
3
SA-WP890
• IC Block Diagrams
– MAIN Board –
IC202, IC203 NJM4565D
V+
8
A OUTPUT
A -INPUT
A +INPUT
V-
1
A B
2
3
4
IC500 uPC1237C-A
OFF AC
4
SWITCH FOR
LATCH/AUTOMATIC
AC-OFF
DETECTOR
RESET
RESET
3
FLIP-FLOP
B OUTPUT
7
B -INPUT
6
B +INPUT
5
DETECT DC
2
OUTPUT
OFFSET
DETECTOR
LOADOVER
1
OVERLOAD
DETECTOR
5
GND
OUTPUT
OFFSET
DETECTOR
6
DRIVER
RELAY
OUTPUT
OFFSET
DETECTOR
7
OFF AC
8
VCC
4
1-1. BLOCK DIAGRAM
SA-WP890
J101
(AUDIO IN)
RV801
(VOL)
IC202 (1/2)
BUFFER
IC203 (1/2)
AMP
IC203 (2/2)
AMP
+V
-V
Q102
+V REG
Q103
-V REG
IC202 (2/2)
AMP
Q301, Q311
CURRENT REGULATOR
Q302, Q304
PRE DRIVE
Q303, Q305
CURRENT MIRROR
IC500
PROTECTION
DRIVER
RELAY
LOAD
OVER
OFF
RY301
Q307 - Q310
AMP
Q731
SWITCH
D505
1
6
4
AC
D504
Q505
SWITCH
RELAY
D901
(POWER)
SP1
(SPEAKER)
D402
RECT
+B
-B
+V
D801 - D804
RECT
T1
POWER
TRANSFORMER
F901
AC
IN
Signal Path
: AUDIO
SA-WP890
55
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