SERVICE MANUAL
USB ACTIVE SPEAKER SYSTEM
US Model
AEP Model
UK Model
E Model
SPECIFICATIONS
SS-US301/SW-US301/UZ-US301
Ver 1.0 2003.12
9-961-437-01
Sony Corporation
2003L05-1
Aiwa Original Products
C
2003.12
Published by Sony Engineering Corporation
For the U.S.A. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 4 ohms loads subwoofer driven, from 20 - 200 Hz;
rated 20 watts minimum RMS power, with no more than
0.8% total harmonic distortion from 250 milliwatts to
rated output.
UZ-US301
SW-US301 (Subwoofer)
Type
Active subwoofer, bass
reflex
Figure
130 mm (5 1/
8 in.), cone
type*
Maximum output power
45 W
30 W (10 % THD)
Rated impedance
4 ohms
Dimensions (w/ h/d)
160 × 300 × 300 mm
(6 3/
8 × 11
7/
8 × 11
7/
8
in.) (not including the
projecting parts)
Mass
5.8 kg (12.79 lb)
* Magnetically shielded type
Inputs and Outputs
USB
Type B
LINE
LINE IN (pin jack)
Speaker
speaker output
(terminal)
SS-US301 (Satellite Speaker)
Type · Figure
Front 58 mm (2 3/
8 in.),
cone type*, closed type
Dual Center 48 mm
(1 15/
16 in.), cone type*
uni directional type
Maximum output power
Front
25 W × 2
17 W × 2 (10 % THD)
Dual Center
25 W
17 W (10 % THD)
Rated impedance
Front 8 ohms
Dual Center 4 ohms + 4
ohms
Dimensions (w/ h/d)
85 × 200 × 125 mm
(3 3/8 × 7 7/8 × 5 in.)
(not including the
projecting parts)
Mass
Approx. 650 g (1.43 lb) ×
2
* Magnetically shielded type
SS-US301
SW-US301
SS-US301
Power requirements and others
Power source
U.S.A. model:
120 V AC, 60 Hz
Other models:
220 - 240 V AC, 50/60 Hz
Power consumptions
U.S.A. model:
60 W
1 W (at the Power Saving
Mode)
Other models:
60 W
0.5 W (at the Power
Saving Mode)
Supplied accessories
USB cable (1.8 m (5.9 ft.) ) (1)
Design and specifications are subject to change without
notice.
· UZ-US301 consists of the following models respectively.
UZ-US301
Subwoofer
SW-US301
Satellite Speaker
SS-US301
2
SS-US301/SW-US301/UZ-US301
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 PUB-
LISHED BY SONY.
Notes on chip component replacement
·Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
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
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 °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 oc-
cur 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.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The "limit" indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
3
SS-US301/SW-US301/UZ-US301
TABLE OF CONTENTS
1.
SERVICING NOTE .................................................
4
2.
GENERAL ..................................................................
5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
6
3-2. Top Chassis .....................................................................
6
3-3. MAIN Board ...................................................................
7
3-4. Front Cabinet Section .....................................................
7
4.
TEST MODE .............................................................
8
5.
DIAGRAMS
5-1. Block Diagram ................................................................
9
5-2. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 10
5-3. Printed Wiring Board MAIN Board ........................ 12
5-4. Schematic Diagram MAIN Board (1/3) .................. 13
5-5. Schematic Diagram MAIN Board (2/3) .................. 14
5-6. Schematic Diagram MAIN Board (3/3) .................. 15
5-7. Printed Wiring Board DISPLAY Board .................. 16
5-8. Schematic Diagram DISPLAY Board ..................... 17
5-9. Printed Wiring Board AMP Board (US model) ...... 18
5-10. Schematic Diagram AMP Board (US model) ......... 19
5-11. Printed Wiring Board
AMP Board (Except US model) ............................... 20
5-12. Schematic Diagram
AMP Board (Except US model) ............................... 21
5-13. Printed Wiring Board
SUB Board (Except US model) ................................ 22
5-14. Schematic Diagram
SUB Board (Except US model) ................................ 22
6.
EXPLODED VIEWS
6-1. Overall Section ................................................................ 25
6-2. Front Cabinet Section ..................................................... 26
6-3. Main Section ................................................................... 27
6-4. Rear Chassis Section ....................................................... 28
6-5. SS-US301 (L)/(R) ........................................................... 29
7.
ELECTRICAL PARTS LIST .............................. 30
4
SS-US301/SW-US301/UZ-US301
R
FRONT
CENTER
AUDIO IN
L
USB
AUTO
POWER
ON
OFF
Rear View
PART No.
SECTION 1
SERVICING NOTE
· MODEL IDENTIFICATION
MODEL
PART No.
AEP and UK models
4-253-567-0[]
US model
4-253-649-0[]
Korean model
4-254-404-0[]
Singapore model
4-254-406-0[]
Hong Kong model
4-254-408-0[]
5
SS-US301/SW-US301/UZ-US301
SECTION 2
GENERAL
This section is extracted from
instruction manual.
PHONES
VOLUME
USB
WOOFER
S-MODE
SURROUND MODE
WOOFER
LEVEL
-6
1
VOLUME
-4
2
-2
3
0
4
+2
5
+4
6
+6
dB
7
1
2
USB/AUDIO IN
VOLUME +/
^
/1 (POWER) indicator
USB indicator
^
/1 (POWER)
USB/AUDIO IN
VOLUME LEVEL
PHONES
VOLUME
USB
WOOFER
S-MODE
SURROUND MODE
WOOFER
LEVEL
-6
1
VOLUME
-4
2
-2
3
0
4
+2
12
5
+4
6
+6
dB
7
USB/AUDIO IN
Headphone jack
Subwoofer lebel
S-MODE indicator
S-MODE
Woofer
R
FRONT
CENTER
AUDIO IN
L
USB
AUTO
POWER
ON
OFF
R
CENTER
FRONT
AUDIO IN
L
RL
USB
AUTO
POWER
ON
OFF
Connection
A
USB cable (supplied)
To USB port
To your computer
To LINE OUT/ the
Headphones jack,
etc.
Audio connecting cord (not supplied)
To USB port
To wall outlet
Subwoofer (this system)
B
MD player
CD player
Game devices,
etc.
Speaker cords
Speaker cords
Center (R)
Front (R)
Center (L)
Front (L)
Satellite
speaker (L)
Satellite
speaker (R)
Hole for attaching the floor
stand (not supplied)
Hole for attaching the floor
stand (not supplied)
Red
Purple
Green
White
Location of controls