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SUBWOOFER SYSTEM
YST-SW030/YST-SW010 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 in
personal injury, destruction of expensive components,
and failure of the product to perform 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)
YST-SW030/
YST-SW010
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.
I CONTENTS
TO SERVICE PERSONNEL .......................................... 2 BLOCK DIAGRAM ....................................................... 10
SPECIFICATIONS / .................................... 3~4 PRINTED CIRCUIT BOARD .................................. 11~12
INTERNAL VIEW ........................................................... 4 SCHEMATIC DIAGRAM ........................................ 13~14
REAR PANELS .......................................................... 5~8 PARTS LIST ........................................................... 15~25
DISASSEMBLY PROCEDURES ........... 9~10
100886
P.O.Box 1, Hamamatsu, Japan
YST-SW030/YST-SW010
I TO SERVICE PERSONNEL
AC LEAKAGE
WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT
1. Critical Components Information
Components having special characteristics are marked s
and must be replaced with parts having specifications equal
to those originally installed.
2. Leakage Current Measurement (For 120V Models Only)
INSULATING
When service has been completed, it is imperative to verify TABLE
that all exposed conductive surfaces are properly insulated
from supply circuits.
G Leakage current must not exceed 0.5mA.
G Meter impedance should be equivalent to 1500 ohm shunted
by 0.15µF. G Be sure to test for leakage with the AC plug in both polarities.
"CAUTION"
"F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2A (YST-
SW030) / 1.6A (YST-SW010), 125V FUSE."
CAUTION
F1: REPLACE WITH SAME TYPE 2A (YST-SW030) / 1.6A (YST-SW010), 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2A (YST-SW030) / 1.6A (YST-SW010), 125V.
WARNING: CHEMICAL CONTENT NOTICE!
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!
YST-SW030/
YST-SW010
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.
About Lead Free Solder /
The foil side of MAIN P.C.B. used for this product are
soldered with lead free soldering material which is an
alloy of Sn+Ag+Cu (tin + silver + copper).
Among some types of lead free solder currently available,
it is recommended to use one of the following types for the
repair work.
· Sn + Ag + Cu (tin + silver + copper)
· Sn + Cu (tin + copper)
· Sn + Zn + Bi (tin + zinc + bismuth)
1. As the melting point temperature of the lead free solder is
about 30°C to 40°C (50°F to 70°F) higher than that of the lead
solder, be sure to use a soldering iron suitable to each solder.
2. If lead solder must be used, be sure to remove lead free solder
from each terminal section of the parts to be replaced and
from the area around it completely before soldering, or make
sure that the lead free solder and lead solder melt together
fully.
2
YST-SW030/YST-SW010
I SPECIFICATIONS /
Power Consumption /
Type / Advanced Yamaha Active Servo Technology
[YST-SW030]
Output Power / (100 Hz, 5 ohms, 10% T.H.D.)
U, C, A, B, G, L, R, T, K models .................................... 70 W
[YST-SW030] ................................................................. 75 W
J model ........................................................................... 40 W
[YST-SW010] ................................................................. 50 W
[YST-SW010]
Input Sensitivity / (50 Hz, 5 ohms) U, C, A, B, G, L, R, T, K models .................................... 45 W
INPUT (PJ) J model ........................................................................... 30 W
[YST-SW030] ................................................... 70 mV (75 W)
Dimensions / (W x H x D)
[YST-SW010] ................................................... 50 mV (50 W)
[YST-SW030] ......................................... 290 x 361 x 311 mm
Dynamic Power / (5 ohms) (11-7/16" x 14-3/16" x 12-1/4")
[YST-SW030] ............................................................... 130 W [YST-SW010] ......................................... 280 x 325 x 293 mm
[YST-SW010] ............................................................... 100 W (11-1/16" x 12-13/16" x 11-9/16")
Input Impedance / Weight /
INPUT (PJ) ............................................................. 12 k-ohms [YST-SW030] ....................................... 10.0 kg (22 lbs. 1 oz.)
Frequency Response / [YST-SW010] ....................................... 8.5 kg (18 lbs. 12 oz.)
[YST-SW030] ................................................ 28 Hz to 200 Hz Finish
[YST-SW010] ................................................ 30 Hz to 200 Hz Cherry Color ............................. A, B, G, L, R, T, K, J models
Driver / (Magnetic Shielding Type) Black Color ........................... U, C, A, B, G, L, R, T, J models
[YST-SW030] ................................................ 8" (20 cm) cone Silver Color ...................... U, C, A, B, G, L, R, T, K, J models
[YST-SW010] ............................................. 6.5" (16 cm) cone Accessories /
Input Section / Subwoofer Cable (5 m) x 1, Non-skid Pad x 4
INPUT ............................................................... RCA Pin Jack
Operation Section / * Specifications are subject to change without notice due to
Rear Panel .... Power Switch, Volume Control, LED Indicator, product improvements.
Voltage Selector (L, R, T, K models)
Power Supply /
YST-SW030/
YST-SW010
U, C models .................................................. AC 120 V, 60 Hz
U .......... U.S.A. model C ...... Canadian model
A model ......................................................... AC 240 V, 50 Hz
A .......... Australian model B ...... British model
B, G models .................................................. AC 230 V, 50 Hz
G .......... European model L ....... Singapore model
L, R, T models ............... AC 110-120 / 220-240 V, 50 / 60 Hz R .......... General model T ....... Chinese model
K model ............................................... AC 110 / 220 V, 60 Hz K .......... Korean model J ....... Japanese model
J model ................................................. AC 100 V, 50 / 60 Hz
· DIMENSIONS /
[YST-SW030] [YST-SW010]
311 (12-1/4") 21
290 (11-7/16") 290 (11-7/16") (13/16") 293 (11-9/16") 13
280 (11-1/16") 280(11-1/16") (1/2")
290.5 (11-7/16")
361 (14-3/16")
277.2 (10-15/16")
325 (12-13/16")
70.5
(2-13/16)
47.8
(1-7/8)
Unit : mm (inch)
Unit : mm (inch)
3
YST-SW030/YST-SW010
Advanced YST QD-Bass Technology
Advanced Yamaha Active Servo QD-Bass (Quatre Dispersion
Technology is a unique system to Bass) technology is a Yamaha
let the speaker unit have a per- unique technology to radiate the
fectly linear motion by the speaker sound efficiently in four horizontal
and amplifier combination. direction.
I INTERNAL VIEW
YST-SW030
1 2
1 MAIN (3) P.C.B.
2 MAIN (1) P.C.B.
3 MAIN (6) P.C.B.
4 Power Transformer
5 MAIN (7) P.C.B. (U, C, A, B, G, J models)
MAIN (10) P.C.B. (L, R, T, K models)
YST-SW030/
6 MAIN (9) P.C.B. (L, R, T, K models only)
YST-SW010
7 MAIN (2) P.C.B.
3 8 MAIN (4) P.C.B.
8 7 6 5 4 Rear Panel
YST-SW010
1 2
1 MAIN (3) P.C.B.
2 MAIN (1) P.C.B.
3 MAIN (6) P.C.B.
4 MAIN (7) P.C.B. (U, C, A, B, G, J models)
MAIN (10) P.C.B. (L, R, T, K models)
5 Power Transformer
6 MAIN (9) P.C.B. (L, R, T, K models only)
3 7 MAIN (2) P.C.B.
8 MAIN (4) P.C.B.
8 7 6 5 4 Rear Panel
4
YST-SW030/YST-SW010
I REAR PANELS
YST-SW030 (U, C models) YST-SW030 (A model)
YST-SW030/
YST-SW010
YST-SW030 (B, G models) YST-SW030 (L model)
5
YST-SW030/YST-SW010
YST-SW030 (R model) YST-SW030 (T model)
YST-SW030 (K model) YST-SW030 (J model)
YST-SW030/
YST-SW010
6
YST-SW030/YST-SW010
YST-SW010 (U, C models) YST-SW010 (A model)
YST-SW010 (B, G models) YST-SW010 (L model)
YST-SW030/
YST-SW010
7
YST-SW030/YST-SW010
YST-SW010 (R model) YST-SW010 (T model)
YST-SW010 (K model) YST-SW010 (J model)
YST-SW030/
YST-SW010
8
YST-SW030/YST-SW010
I DISASSEMBLY PROCEDURES /
* The description below uses YST-SW030 as a representative
model.
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet.
1. Removal of Driver
a. Remove 4 screws (1) and then remove the Base. (Fig. 1)
b. Remove 4 screws (2) and then remove the Driver. (Fig. 1)
c. Disconnect the connector connected to the terminal of the
Driver. (Fig. 1)
1 1
Base
2 2
Driver
Connector
YST-SW030/
YST-SW010
Fig. 1
2. Removal of Rear Panel Ass'y
a. Remove 8 screws (3). (Fig. 2)
* Screws (3) are identified with arrow marks ( ).
b. Pull out the rear panel ass'y. (Fig. 2)
3
3
Fig. 2
9
YST-SW030/YST-SW010
When Checking the P.C.B.:
· Connect all the connectors removed during
disassembly back to the original positions.
· Spread the Rubber sheet and cloth for insulation
purpose and place the rear panel ass'y on it. (Fig. 3)
Rubber Sheet and Cloth
Fig. 3
YST-SW030/
YST-SW010
I BLOCK DIAGRAM
VR1
VOLUME *( ) YST-SW010 Pin No.
INPUT POWER
IC4A AMP
3 IC5A
2 4 IC5B +B RY1
4 2 6 DRIVER
8 3 *(2) 10 *(9)
- 12 *(10)
2 *(1) IC1
+
9 *(8)
L.P.F. L.P.F. H.P.F. -B
6dB/oct 12dB/oct 12dB/oct
A.N.I.C
IC2
Q16 R28
D19,21 0.1
LIMITER
Q5,6,7,8
+B
D4,5,22,23 2
F1
T1 IC3
+15 Q9,D2
POWR POWER PROTECTION
REGULATER SUPPLY SW1
D1
Q10,D3
-15
-B
10
A B C D E F G H I J
YST-SW030/YST-SW010
1
I PRINTED CIRCUIT BOARD (Foil side) YST-SW030 MAN (1) P. C. B. (Lead Type Device)
MAN (3) P. C. B. (Lead Type Device) DRIVER
WH
VOLUME
2 RE
RE
BL
INPUT RE
-15
+15
-V
E
MAIN
3
Circuit No. U, C, A, B, G, J L, R, T, K
F2 X O
CB4, 5 X O
SW2 X O
W7 X O
W8 X O
W9 X O
W10 X O
MAIN
E
-V
+15
-15
4 U, C, A, B, G, J models only
MAN (2) P. C. B. (Lead Type Device)
MAN (7) P. C. B. MAN (6) P. C. B.
BE
(Lead Type Device) RE (Lead Type Device)
WH BE WH
U, C, A, B, G, J models
Power
BL
Transformer
L, R, T, K models
5
WH
POWER WH RE
BE
BE
RE BE YE
WH
6
MAN (4) P. C. B. YE
BR
(Lead Type Device) RE
Power
VOLTAGE Transformer
· Semiconductor Location SELECTOR BR
Ref. no. Location Ref. no. Location Ref. no. Location Ref. no. Location
D1 I2 D19 G3 IC2 G3 Q6 F3
BE
D2 H3 D20 F2 IC3 H3 Q7 E2 L, R, T, K models only L, R, T, K models only
D3 I3 D21 F2 IC4 B3 Q8 F3
7
D4
D5
E2
F2
D22
D23
E3
F3
IC5
Q1
B2
F2
Q9
Q10
H3
I3
MAN (9) P. C. B. BE MAN (10) P. C. B.
D6 G2 D24 J3 Q2 F2
D7 E2 IC1 G1 Q5 E3 (Lead Type Device) (Lead Type Device)
11
A B C D E F G H I J K
YST-SW030/YST-SW010
MAIN (1) P. C. B. (Lead Type Device)
1
I PRINTED CIRCUIT BOARD (Foil side) YST-SW010
MAIN (3) P. C. B. (Lead Type Device)
DRIVER
VOLUME
WH
2
RE
RE
INPUT BL
-15 RE
+15
-V
E
MAIN
3
Circuit No. U, C, A, B, G, J L, R, T, K
F2 X O
CB4, 5 X O
SW2 X O
W7 X O
W8 X O
W9 X O
W10 X O
MAIN
E
-V
+15
-15
4 · Semiconductor Location
Ref. no. Location Ref. no. Location Ref. no. Location Ref. no. Location
D1 I2 D19 G3 IC2 G3 Q6 F3
MAIN (7) P. C. B. MAIN (6) P. C. B.
D2 H4 D20 F3 IC3 H3 Q7 E3 MAIN (2) P. C. B. (Lead Type Device)
D3 I4 D21 F3 IC4 B3 Q8 F3 (Lead Type Device) BE RE
D4 E3 D22 E3 IC5 B2 Q9 I4 (Lead Type Device) U, C, A, B, G, J models only
D5 F3 D23 F3 Q1 F2 Q10 I4
D6 G2 D24 J3 Q2 G2
D7 F2 IC1 G1 Q5 E3
Power BL
WH Transformer
U, C, A, B, G, J models
5
WH BE
WH RE
L, R, T, K models
WH
POWER
BE
RE BE YE
BE
BE
6
BE
BR
SELECTOR
VOLTAGE
BR
Power
Transformer
MAIN (4) P. C. B. RE
(Lead Type Device) YE L, R, T, K models only
L, R, T, K models only
MAIN (10) P. C. B.
7
MAIN (9) P. C. B. WH
(Lead Type Device)
(Lead Type Device)
12
A B C D E F G H I J K L
YST-SW030/YST-SW010
SCHEMATIC DIAGRAM YST-SW030
1
L.P.F. L.P.F. H.P.F. POWER AMP.
MAIN (3) 4 MAIN (1)
1.1
0 2 6
3 8 LIMITER
0.2
0.2
0
-41.4
14.6
1.1
-41.6
41.5
0
0
0 0 41.5
0 7 0
9 14.3 0 41.4
5 -14.4
1.8
3 41.4
INPUT 0 2 0
4 -0.7
0
0 0
5 -14.3
14.6
0 0 0
2 0 0.1
VOLUME -1.8
0
0
0
7 0
0
0 0
6 8
0 0.1
0
0 0 0
9 14.3
-14.6
DRIVER
-0.7
-0.7
3
0
0
0
1.1
0
1.4