Text preview for : Yamaha-YSTSW515 actsub.pdf part of Yamaha YSTSW515 active subwoofer
Back to : Yamaha-YSTSW515 actsub.pa | Home
SUBWOOFER SYSTEM
YST-SW515 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.
YST-SW515
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.
I CONTENTS
TO SERVICE PERSONNEL .......................................... 2 BLOCK DIAGRAM ....................................................... 10
SPECIFICATIONS / ........................................ 3 PRINTED CIRCUIT BOARD .................................. 11~12
INTERNAL VIEW ........................................................... 4 SCHEMATIC DIAGRAM .............................................. 13
REAR PANELS .......................................................... 4~5 PARTS LIST ........................................................... 15~23
DISASSEMBLY PROCEDURES ............. 6~7
ADJUSTMENTS / 8~9
100896
P.O.Box 1, Hamamatsu, Japan
YST-SW515
AC LEAKAGE
I TO SERVICE PERSONNEL WALL EQUIPMENT TESTER OR
1. Critical Components Information
OUTLET UNDER TEST EQUIVALENT
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)
When service has been completed, it is imperative to verify INSULATING
that all exposed conductive surfaces are properly insulated TABLE
from supply circuits.
G Meter impedance should be equivalent to 1500 ohm shunted G Leakage current must not exceed 0.5mA.
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 6A, 125V FUSE."
CAUTION
F1: REPLACE WITH SAME TYPE 6A, 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 6A, 125V.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the manufacturing process except soldering of the P.C.B. ass'y 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-SW515
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 /
All P.C.B.s 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-SW515
I SPECIFICATIONS /
Type / ...... Advanced Yamaha Active Servo Technology · DIMENSIONS
Output Power / (100 Hz, 5 ohms, 10% T.H.D.) ... 250 W
350(13-3/4") 382(15-1/16") 27
Dynamic Power / (5 ohms) .... 270 W 355(14") (1-1/16")
Input Sensitivity /
INPUT1 (SP) (50 Hz, 250 W / 5 ohms, L + R) ..... 1.0 V
350(13-3/4")
INPUT2 (PJ) (50 Hz, 250 W / 5 ohms, L + R) ... 50 mV
430(16-15/16")
Input Impedance /
INPUT1 (SP) .............................................. 2.2 k-ohms
INPUT2 (PJ) ................................................ 12 k-ohms
(3-1/8")
Frequency Response / 20 Hz to 160 Hz
80
Driver / ................. 10" (25 cm) cone
Magnetic Shielding Type
Unit: mm (inch)
Input Section /
INPUT1 ............................................. Speaker Terminal
INPUT2 ................................................... RCA Pin Jack
Operation Section /
Front Panel .. STANDBY/ON Switch, B.A.S.S. Switch,
H.C. Filter Switch, Volume Control, High
Cut Control, LED Indicator Advanced YST
Rear Panel .. Power Switch, Auto Standby Switch Advanced Yamaha Active Servo Technology is a
(HIGH / LOW / OFF), Phase Switch unique system to let the speaker unit have a perfectly
(NORM / REV), Voltage Selector (R, T, linear motion by the speaker and amplifier
K, L models only) combination.
Power Supply /
U, C models ...................................... AC 120 V, 60 Hz
YST-SW515
R, T, K, L models
AC 240-230 / 220 / 120 / 110 V, 50/60 Hz
A model ............................................. AC 240 V, 50 Hz
B, G models ...................................... AC 230 V, 50 Hz
J model ......................................... AC 100 V, 50/60 Hz
Power Consumption /
U, C, R, T, K, A, B, G, L models .......................... 80 W
J model ............................................................... 100 W QD-Bass Technology
Standby Power Consumption / .. 0.5 W QD-Bass (Quatre Dispersion Bass) technology is a
Dimension / (W x H x D) 350 x 430 x 382 mm Yamaha unique technology to radiate the sound
(13-3/4" x 16-15/16" x 15-1/16") efficiently in four horizontal direction.
Weight / ............................... 19.0 kg (41 lbs. 14 oz.)
Finish
Cherry Color .......... U, C, R, T, K, A, B, G, L, J models
Black Color ............ U, C, R, T, K, A, B, G, L, J models
Accessories /
Subwoofer Cable (5 m) x 1 (J model), Speaker Cable (4
m) x 2 (J model), Nonskid Pad x 4
* Specifications are subject to change without notice due to product
improvements.
U .......... U.S.A. model A ...... Australian model
C .......... Canadian model B ...... British model
R .......... General model G ...... European model
T .......... Chinese model L ....... Singapore model
K .......... Korean model J ....... Japanese model
3
YST-SW515
I INTERNAL VIEW
1 2 3 4 5 6
1 MAIN (8) P.C.B.
2 MAIN (4) P.C.B.
3 MAIN (2) P.C.B.
4 MAIN (10) P.C.B.
5 MAIN (3) P.C.B.
6 MAIN (1) P.C.B.
7 MAIN (5) P.C.B.
8 MAIN (11) P.C.B.
9 POWER TRANSFORMER
0 MAIN (6) P.C.B.
7 8 9 0
YST-SW515
I REAR PANELS
U, C models R model
4
YST-SW515
T model K model
A model B, G models
YST-SW515
L model J model
5
YST-SW515
I DISASSEMBLY PROCEDURES
(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 Connector
Driver
YST-SW515
Fig. 1
2. Removal of Front Panel Ass'y
a. Remove 4 screws (3). (Fig. 2)
* Use an Allen wrench (2.5mm) to unscrew the Front
Panel Ass'y.
b. Pull out the front panel ass'y and disconnect the
connector (CB4). (Fig. 2)
Front Panel Ass'y
CB4
3
3
Fig. 2
6
YST-SW515
3. Removal of Rear Panel Ass'y
a. Remove 8 screws (4). (Fig. 3)
* Screws (4) are identified with arrow marks ( ).
b. Pull out the rear panel ass'y. (Fig. 3)
c. Remove 2 screws (5). (Fig. 3)
* Screws (5) are identified with arrow marks ( ).
d. Remove the cover. (Fig. 3)
e. Disconnect the connectors (CB9 and CB10). (Fig. 3)
to CB4
to CB9
4
to CB10
5
5
4
YST-SW515
Fig. 3
When Checking the P.C.B.:
· Connect all the connectors removed during
disassembly back to the original positions.
· Spread cloth first and place the rear panel ass'y
on it. (Fig. 4)
Note:
Replace this Bush with the new article
when remove the Rear Panel Ass'y.
Rubber Sheet and Cloth
Fig. 4
7
YST-SW515
I ADJUSTMENTS /
G Confirmation of Power Amp operation
For the power amplifier which has been repaired, it is
absolutely necessary to confirm that a correct A B
waveform is obtained at points indicated by A
and B
in
the schematic diagram according to the following
procedure.
Devices required
Signal generator
8 or 6 load resistor
Oscilloscope (dual trace type)
Connection
1) Connect the output signal from the signal generator to
the input terminal of the unit.
2) Disconnect the connector terminal connected to the
speaker unit and reconnect it to the load resistor.
3) Connect the HOT side of the oscilloscope CH1 probe to
the point A or B indicated in the figure and the GND side
to the GND of the main unit.
4) Connect the oscilloscope CH2 input to the red side of
the connector cable, which is connected with the load
resistor.
At this time, the GND terminal of CH2 must be left
unconnected.
Setting
1) Set the signal generator to the sine wave, 100 Hz and
minimum output level settings.
YST-SW515
2) Set the volume of the unit to the minimum position.
3) Turn on the power to the unit.
4) Adjust the output level of the signal generator and the
volume of the unit so that the output level observed at
oscilloscope CH2 is 28 Vp-p.
Waveform observation
With the settings made as described above, observe
the waveform obtained at CH1 for judgment.
Point A (Cathode of D29) Point B (Anode of D31)
V : 20 V/div H : 2 msec/div V : 20 V/div H : 2 msec/div
DC range 1 : 1 probe DC range 1 : 1 probe
8
YST-SW515
G Idling Adjustment Schematic Diagram /
To stabilize operation of the amplifier, turn ON the power
with no input signal and wait for 2 to 3 minutes in non
loaded condition before the adjustment.
Confirm that the voltage across the terminals TP11 and
TP12 is 10 mV to 200 mV.
POWER DRIVE PS AMP
If it exceeds 200 mV, open (cut off) R172.
G Confirmation of AUTO STANDBY operation
Setting
1) Turn off the power switch located on the rear panel.
A
2) In order to shorten the time required for operation
check; connect a 10k resistor at both ends of R252 on
DRIVER
R273
330
the MAIN (3) P.C.B. (Refer to page 11)
3) Connect the output signal from the signal generator to
the INPUT 2 / L/MONO terminal of the unit.
R274
330
4) Set the signal generator for the sine wave of 100Hz,
8mV.
5) Turn on the power switch located on the rear panel.
B
Confirmation
1) Set the AUTO STANDBY switch to the LOW position.
IDLING CURRENT
DC 10 mV
ADJ
to
200 mV
2) Turn on the STANDBY/ON switch.
The display LED lights up (green) and its color changes
to red after 4 to 5 seconds. Test Points /
3) Turn off the STANDBY/ON switch.
The display LED goes off.
4) Set the AUTO STANDBY switch to the HIGH position. MAIN (1) P.C.B.
Point A Point B
5) Turn on the STANDBY/ON switch.
The display LED lights up (green) and its color remains
unchanged even after time have elapsed. D29 D31
6) Turn off the STANDBY/ON switch.
TP11 (+)
The display LED goes off.
GND
TP12 (-)
After confirmation
1) Turn off the power switch.
2) Disconnect the 10k resistor connected to both ends of
DC 10 mV to 200 mV
R252. MAIN (10) P.C.B.
Idling Current Adjustment
R172
9
A B C D E F G H I J
YST-SW515
1
I BLOCK DIAGRAM
+ VR1 +B
SW1 PRE DRIVE
PHASE VOLUME Q2--10 POWER DRIVE
L IC11A SELECT
Q1C, 17C, 24A DRIVER
Q28, 29 Q16A/C, 26A/C PS AMP Q27, 31
3 IC11B IC10A B.P.F.
1 6 7 IC7A RY1
7 8 6 IC7B Q201--204
5 6 + 8 4 IC10B
2 2 7 + 2 4
INPUT 1 3 + 2
3
+
L.P.F. L.P.F. H.P.F. Q1A, 17A, 24C
12dB/oct PS AMP
R 6dB/oct 12dB/oct B.A.S.S. Q30, 32
SELECT
+ SW3 B
HIGH CUT A.N.I.C
VR2 IC8
+ 0.1
3 L
LIMITER
Q18--21
D6, 14, 33, 34
OUTPUT
8
OFF
R 4
L TIMER 3 Q37, 38
+ R252
IC201 D36 Q100~102
H 6
PROTECTION
AUTO STANDBY 7
SW2 POWER SUPPLY
4 MUSIC + D1
L SENSOR C227
OFF IC4 +B
INPUT 2 Q205
L
R
H AUTO POWER
ON/OFF CIRCUIT B
POWER SUPPLY RY2
D2 F1
+12 IC6
POWER
REGULATOR
5 SW5
12 IC1
Q209
SUB
POWER SUPPLY
6 D11
T1
REGULATOR REGULATOR
IC202 Q207, 208
STANDBY/ON D203
D9 D202
SW4
(R, T, K models only)
D201
Q206
7
10
A B C D E F G H I J
YST-SW515
1
I PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder Used
· Semiconductor Location
Ref. No. Location Ref. No. Location
D1 J6 Q1A F5
D2 J3 Q1C H5 MAIN (4) P.C.B. MAIN (2) P.C.B.
MAIN (10) P.C.B.
BASS
BASS
TOVL
TOVL
MAIN
PWS
PWS
VCC
VCC
MA2
MA1
D3 H3 Q2 H3
+V2
+V1
+V1
+12
+12
LIM
-12
-12
E
E
E
D4 H2 Q3 H3
D5 H3 Q4 H3
D6 F3 Q5 H3
2 D7 E6 Q6 H3
D9 I2 Q7 H3
D14 F3 Q8 H3
D15 H6 Q9 G5 MAIN (3) P.C.B.
D20 G2 Q10 G3
D21 F6 Q16A F5
TR-C
TR-E
TR-B
D22 G3 Q16C H5
D23 G6 Q17A G5
D24 H6 Q17C H5
D25 G3 Q18 F2 BE
D26 G3 Q19 F2 CONFIRMATION OF
AUTO STANDBY
R273
3 D27 G7 Q20 F3 OPERATION
BL
R
D28 G6 Q21 F3 R252 BE
D29 G6 Q22 H6 add 10k
INPUT1/OUTPUT
D30 F6 Q23 H6
+B1
D31 F6 Q24A G6
-B1
E
D32 F6 Q24C F6 R274
D33 F6 Q26A F7
DR2+
DR1+
AVST
DR1-
DR2-
OUT
D34 F3 Q26C G7
-V
D36 I2 Q27 H2 MAIN (6) P.C.B.
D100 H7 Q28 H2
D205 E6 Q29 G3
4
D206 J6 Q30 G3
L
IC1 I3 Q31 G6
IC4 B5 Q32 F6
IC6 I3 Q37 I2 MAIN (1) P.C.B.
IC8 E2 Q38 I2
IC10 C6 Q100 H6
MAIN (6) P.C.B.
IC11 B4 Q101 I6
INPUT2
IC201 B5 Q102 H6
Q103 H6
Q201 B7
Q202 B6
5
Q203 B7
OFF
Q204 B7
STANDBY
AUTO
Q205 C6
LOW
HIGH
TR-C
TR-E
TR-B
+B1
-B1
E
RE
NORM
PHASE
BASS
TOVL
PWS
MA2
MA1
BL
+V1
+12
LIM
-12
E
6
REV
RE
DRIVER
+
7
DR2+
DR1+
AVST
DR1-
DR2-
OUT
-V
11
A B C D E F G H I J
YST-SW515
1
I PRINTED CIRCUIT BOARD (Foil side) Lead Free Solder Used
MAIN (2) P.C.B. MAIN (5) P.C.B. MAIN (4) P.C.B. MAIN (10) P.C.B. MAIN (8) P.C.B.
BASS
TOVL
MAIN
PWS
VCC
+V2
+12
-12
E
OR STANDBY/ON
LEDG
LEDR
SW5
E1
BE
2 AC POWER
LEDG
LEDR
E1
GY
OR B.A.S.S. STANDBY/ON
VOLUME HIGH CUT
GY 10 0 150Hz 50Hz MOVIE
MUSIC · Semiconductor Location
WH
3 Ref. No. Location
D11 B2
D201 I2
D202 H2
D203 B2
D204 B2
VCC
+V1
IC7 G2
E
IC202 B3
MAIN (10) P.C.B. Q206 H2
Q207 B2
J, U, C, A, B, G models Q208 A2
4 Q209 B2
R, T, K, L models
MAIN (11) P.C.B. MAIN (7) P.C.B.
BE WH BE BE GR BR YE BL RE WH
MAIN (9) P.C.B.
5
GR
YE
RE
BR
6
BE BL
RE BL RE BE BL BE RE BL RE BE BL BE VOLTAGE
SELECTOR
MAIN (1) P.C.B. MAIN (10) P.C.B. MAIN (1) P.C.B. MAIN (10) P.C.B.
7 MAIN (6) P.C.B. MAIN (6) P.C.B.
12
A B C D E F G H I J