Text preview for : Yamaha-YSTSW45 actsub.pdf part of Yamaha YSTSW45 active subwoofer
Back to : Yamaha-YSTSW45 actsub.pdf | Home
POWERED SUBWOOFER SYSTEM
YST-SW45 SERVICE MANUAL
IMPORTANT NOTICE
This manual has been provided for the use of authorized YAMAHA
Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the
industry, and more specifically YAMAHA Products, are already
known and understood by the users, and have therefore not been
restated.
WARNING: Failure to follow appropriate service and safety
procedures when servicing this product may result
STANDBY/ON HIGH CUT VOLUME
in personal injury, destruction of expensive
components, and failure of the product to perform
50Hz 150Hz
SUPERWOOFER SYSTEM YST-SW45
0 10
as specified. For these reasons, we advise all
YAMAHA product owners that any service
required should be performed by an authorized
YAMAHA Retailer or the appointed service
representative.
IMPORTANT: The presentation or sale of this manual to any
individual or firm does not constitute authorization,
certification or recognition of any applicable
technical capabilities, or establish a principle-agent
relationship of any form.
The data provided is believed to be accurate and applicable to the
unit(s) indicated on the cover. The research, engineering, and service
departments of YAMAHA are continually striving to improve
YAMAHA products. Modifications are, therefore, inevitable and
specifications are subject to change without notice or obligation to
retrofit. Should any discrepancy appear to exist, please contact the
distributor's Service Division.
WARNING: Static discharges can destroy expensive
components. Discharge any static electricity your
body may have accumulated by grounding yourself
to the ground buss in the unit (heavy gauge black
wires connect to this buss).
IMPORTANT: Turn the unit OFF during disassembly and part
replacement. Recheck all work before you apply
power to the unit.
CONTENTS
TO SERVICE PERSONNEL .......................................... 1 BLOCK DIAGRAM ......................................................... 4
SPECIFICATIONS .......................................................... 1 IC BLOCK ....................................................................... 4
DIMENSIONS ................................................................. 1 PRINTED CIRCUIT BOARD ...................................... 5~7
INTERNAL VIEW ........................................................... 2 SCHEMATIC DIAGRAM ................................................ 8
REAR PANELS .............................................................. 2 PARTS LIST ............................................................. 9~15
DISASSEMBLY PROCEDURES ................................... 3
100676
P.O.Box 1, Hamamatsu, Japan
YST-SW45
AC LEAKAGE
TO SERVICE PERSONNEL WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT
Critical Components Information.
Components having special characteristics are marked
and must be replaced with parts having specifications
equal to those originally installed.
INSULATING
TABLE
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic
(where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency
(and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA-
SON WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
SPECIFICATIONS DIMENSIONS
Unit: mm (inch)
Type ........... Active Servo Processing Subwoofer System
Speaker Unit ............... 20 cm (8") cone woofer (JA2162)
magnetic shielding type x 1
365(14-7/20)
Amplifier Output ........................................ 70 W/5 ohms
High-Cut Filter ...................... 50 Hz150Hz (-24 dB/oct.)
Frequency Response ................ 30 Hz200Hz (10 dB)
Power Supply
U.S.A. and Canada models ............... AC120V, 60Hz
Australia model .................................. AC240V, 50Hz
U.K. and Europe models ................... AC230V, 50Hz 235(9-5/16) 40 260(10-1/4) 18
(1-9/16) 318(12-1/2) (11/16)
General and China models
.................................... AC110/120/220/240V, 50/60Hz
(Adjustable with Voltage Selector)
Power Consumption ............................................... 55 W
Dimensions (W x H x D) ................ 235 x 365 x 318 mm
....................................... (9-5/16" x 14-7/20" x 12-1/2")
Weight .............................................. 9 kg (19 lbs. 13 oz.)
Supplied Accessory .................................. Rubber Pads
* Specifications subject to change without notice.
1
YST-SW45
INTERNAL VIEW
1 MAIN P.C.B. (4)
1 2 MAIN P.C.B. (3)
2 3 MAIN P.C.B. (1)
4 MAIN P.C.B. (2)
5 Power Transformer
3
4
5
Right side internal view
REAR PANELS
U, C models R model A model
OUTPUT INPUT2 AUTO OUTPUT INPUT2 AUTO OUTPUT INPUT2 AUTO
R TO SPEAKERS L STANDBY R TO SPEAKERS L STANDBY R TO SPEAKERS L STANDBY
L L L
LOW HIGH LOW HIGH LOW HIGH
R R R
R L R L R FROM AMPLIFIER L OFF
FROM AMPLIFIER OFF FROM AMPLIFIER OFF
INPUT1 INPUT1 INPUT1
MODEL NO. MODEL NO.
YST SW45 YST SW45
VOLTAGE
120 VOLTS 80 WATTS 60Hz SELECTOR 240 VOLTS 55 WATTS
50 Hz
MADE IN MALAYSIA
MADE IN MALAYSIA
SER. NO.
SER. NO.
ATTENTION:RISQUE DE CHOC ELECTRIQUE MODEL NO.
NE PAS OUVRIR. YST SW45
WARNING :TO REDUCE THE RISK OF FIRE 110/120/220/240 VOLTS
OR ELECTRIC SHOCK,DO NOT EXPOSE 55 WATTS 50/60 Hz
THIS APPLIANCE TO RAIN OR MOISTURE. POWER POWER POWER
MADE IN MALAYSIA
SER.NO. N89
ON ON ON
OFF OFF OFF
B model T model
OUTPUT INPUT2 AUTO OUTPUT INPUT2 AUTO
R TO SPEAKERS L STANDBY R TO SPEAKERS L STANDBY
L L
LOW HIGH LOW HIGH
R R
R FROM AMPLIFIER L OFF
R FROM AMPLIFIER L OFF
INPUT1 INPUT1
MODEL NO.
YST SW45 VOLTAGE
230 VOLTS 55 WATTS SELECTOR
50 Hz
MADE IN MALAYSIA
SER. NO.
MODEL NO.
YST SW45
110/120/220/240 VOLTS
55 WATTS 50/60 Hz
POWER POWER
MADE IN MALAYSIA
SER.NO.
ON ON
OFF OFF
2
YST-SW45
DISASSEMBLY PROCEDURES
(Remove parts in the order as numbered.)
1. Removal of Front Grille 2. Remove of Speaker
The front grille is fixed to the cabinet with dowels at 4 a. Remove 4 screws (1) in Fig. 2, and remove the
locations. speaker.
As a screwdriver (for slotted head screw) is used for b. Remove the cable cord.
removal, use special care not to cause damage to the
cabinet. 3. Removal of the Rear Panel
a. Apply the block to the rear panel so as to avoid damage a. Remove 10 screws (2) in Fig. 2, and remove the rear
to the Terminal of the rear panel. panel.
b. Use the screwdriver inserted in the gap between the * When removing the rear panel, replacing the packing.
front grille and the cabinet (bottom side first), push up
the front grille. (Fig. 1)
c. Remove the front grille by lifting it up. (Fig. 1)
2
2
Fig. 1
2
1 Fig. 2
3
YST-SW45
BLOCK DIAGRAM
+
VR3
L VOLUME
IC1A
2 IC1B L.P.F
1 6 IC7A
- 7 6 IC7B
6dB/oct
SPEAKER
3 8 4
5 2 2
INPUT 1 13 RY1
L.P.F 7 3 IC9
6dB/oct L.P.F H.P.F L.P.F
- 12dB/oct 12dB/oct 6dB/oct 1
POWER
AMP A.N.I.C
R
+ IC2,3,6
Q7 0.1
HIGH
CUT
VR2
LIMITER
+
Q3, 6
D4,D5
L
D7
4
- IC8
OUTPUT PROTECTION
- +B
R RY2 F1
+15 Q1,D2
+
8 POWER
PWR 4 REGULATOR SUPPLY POWER SW
D1 SW5
TIMER 3
-15 Q2,D3
IC5
L
6 -B
INPUT 2 7 D19 D8
R POWER
LED
AUTO RY2 T1
POWER + Q11
H SW2 SIGNAL VCC
D11
SENSOR
L IC4 Q12
SW1
OFF +8
PWR IC10
STANDBY/ON
SW
AUTO POWER ON/OFF CIRCUIT
IC BLOCK DIAGRAM
µPC4570HA (OP Amp.) NJM78L08A (Voltage Regulator)
VIN
1 2 VOUT
- -
GND
NJM4558L (OP Amp.)
STK4036-2 (Amp.)
15 7
14
R1 TR4 TR7
C1 R7 TR8
TR1 TR2 R4 R9
1 TR5 13
D2
R5
2 R8 TR9
6 TR10
R10
4 12
M51848L (CR Timer) 3 TR3
R3
SUB D1 R6
R2
PC1237HA (Protect IC)
4
A B C D E
YST-SW45
1
PRINTED CIRCUIT BOARD (Foil side)
MAIN P.C.B. (1)
2
From: MAIN (7)
3
From: MAIN (2)
4
SPEAKER +
+
From: MAIN (4)
5
From: MAIN (3)
6
7
5
A B C D E
YST-SW45
1
PRINTED CIRCUIT BOARD (Foil side)
To: MAIN (3) To: VOLTAGE
MAIN P.C.B. (2) SELECTOR
To: MAIN (1) (GENERAL model)
2
To:
MAIN (6)
3
From: MAIN (5)
4
MAIN P.C.B. (3)
From: MAIN (2)
To: MAIN (1)
5
6
AUTO INPUT2
STANDBY
7
OUTPUT / INPUT
6
A B C D E
YST-SW45
1
PRINTED CIRCUIT BOARD (Foil side)
MAIN P.C.B. (4)
2
3
To: MAIN (1)
MAIN P.C.B. (5)
POWER
4
To: MAIN (2)
5
MAIN P.C.B. (6) MAIN P.C.B. (7)
To: MAIN (1)
From: MAIN (2)
6
POWER TRANSFORMER
7
From: VOLTAGE SELECTOR
(GENERAL model)
7
A B C D E F G H I J K L
YST-SW45
SCHEMATIC DIAGRAM
1
14.4
0
0 0
0 35.9
-0.4 1.2 36.7
2 0
-0.4 -1.3
0 -36.8
0 -34.5
-1.3
-35.7
0
14.2
14.4
0 0 0
0 0
0
0
0
3 0 0
0 0 0
-14.2
0 14.4
0
0
14.4 0
0
0
0
4
2.2
0.8
0
2.0
0
0
0
3.1 0
0 -1.8
0 0
AC57.4 -36.8 36.7
-14.2
0.2
0.2 0
0
0 0
25.4 0.8 0 14.4 -14.2
0 0 0
6.1
0
32.5 14.4
0
0
-14.2
6.6
14.9
0
6.6 6.0
5
-14.7
-32.7 -14.2
1.8
0
12.7 7.9
6 0 0
0
14.2
0
0
7.9
5.3
7.9
7.3
6.6
1.4
12.7
7 0 7.9
0
0
6.7 7.3
AC12.2
3.9
1.9 6.6 -13.9
1.9 1.4 0
3.9 0 0 0
0
0.7
12.7
0
8
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SD1913 2SC4688 2SC1815 2SK304 D3SBA20 S1NB20 1SS133 M51848L µPC4570HA NJM4558L NJM78L08A STK4036-2 HAll v oltage are measured with a 10MW/V DC electric volt meter.
2SB1274 2SA1015 MTZ15C HComponents ha ving special characteristics are marked s and must be replaced
2SC2240 MTZJ24B Anode