Yamaha YST-SW012 User manual

■CONTENTS
TO SERVICE PERSONNEL .......................................... 2
SPECIFICATIONS.......................................................... 3
INTERNAL VIEW ........................................................... 4
REAR PANELS .......................................................... 5~6
DISASSEMBLY PROCEDURES ............................... 7~8
BLOCK DIAGRAM ......................................................... 8
PRINTED CIRCUIT BOARD .......................................... 9
SCHEMATIC DIAGRAM .............................................. 10
PARTS LIST ........................................................... 11~15
2005 All rights reserved.
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
SUBWOOFER SYSTEM
YST-SW012
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)
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.
YST-SW012
'05.12
100994
P.O.Box 1, Hamamatsu, Japan
SERVICE MANUAL

YST-SW012
2
YST-SW012
WALL
OUTLET
EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
■TO SERVICE PERSONNEL
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)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
●Meter impedance should be equivalent to 1500 ohms shunted
by 0.15µF.
“CAUTION”
“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 1.6A,
125V FUSE.”
CAUTION
F1: REPLACE WITH SAME TYPE 1.6A, 125V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 1.6A, 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!
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.
●Leakage current must not exceed 0.5mA.
●Be sure to test for leakage with the AC plug in both polarities.
About Lead Free Solder
Side A
Side B
SMT REFLOW Process
MI FLOW Process
Solder Dip
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)
Caution:
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.
The P.C.B.s installed in this unit are soldered using the following solder.
MAIN P.C.B.
Side A
–
Side B
Lead Free Solder

YST-SW012
3
YST-SW012
■SPECIFICATIONS
Type .................. Advanced Yamaha Active Servo Technology II
Output Power ..................... 50 W (100 Hz, 5 ohms 10% T.H.D)
Input Sensitivity ......................... 50 mV (50 Hz, 50 W / 5 ohms)
Dynamic Power .................................................. 100 W, 5 ohms
Input Impedance ....................................................... 12 k-ohms
Frequency Response ....................................... 28 Hz to 200 Hz
Driver ............................................... 20cm (7-7/8") Cone Woofer
Magnetic Shielding Type
Input Section
INPUT ......................................................................... RCA Pin jack
Operation Section
Power Switch, Volume Control, LED indicator
Power Supply
U, C models .................................................... AC 120 V, 60 Hz
R, T, K, L models ............. AC 110-120 / 220-240 V, 50 / 60 Hz
A model ........................................................... AC 240 V, 50 Hz
B, G models .................................................... AC 230 V, 50 Hz
Power Consumption ......................................................... 45 W
Dimensions (W x H x D) ......................... 290 x 290 x 327.5 mm
(11-7/16" x 11-7/16" x 12-7/8")
Weight ....................................................... 8.5 kg (18 lbs. 11 oz.)
Finish
Silver color ............................. U, C, R, T, K, A, B, G, L models
Black color ................................... U, C, R, T, A, B, G, L models
Cherry color...................................... R, T, K, A, B, G, L models
Advanced YST II
This subwoofer system employs
Advanced Yamaha Active Servo
Technology II which Yamaha has
developed for reproducing higher
quality super-bass sound.
This super bass sound adds a more
realistic, theater-in-the-home effect
to your stereo system.
290 (11-7/16")
290 (11-7/16") 290 (11-7/16")
327.5 (12-7/8")
12.5
(1/2")
25
(1")
•DIMENSIONS
Unit: mm (inch)
Accessories
Nonskid pad x 4, Subwoofer Cable (5m) x 1
* Specifications are subject to change without notice due to
product improvements.
U .......... U.S.A. model C ...... Canadian model
R .......... General model T ....... Chinese model
K .......... Korean model A ...... Australian model
B .......... British model G ...... European model
L .......... Singapore model

YST-SW012
4
YST-SW012
■INTERNAL VIEW
1 2
467 5 3
MAIN (1) P.C.B.
MAIN (3) P.C.B.
MAIN (5) P.C.B. (U, C, A, B, G models)
MAIN (4) P.C.B. (R, T, K, L models)
MAIN (2) P.C.B.
MAIN (9) P.C.B. (R, T, K, L models)
Power Transformer
MAIN (7) P.C.B. (U, C, A, B, G models)
MAIN (10) P.C.B. (R, T, K, L models)
1
2
3
4
5
6
7

YST-SW012
5
YST-SW012
T model
■REAR PANELS
R model
U, C models
K model
Power Indicator
Power Indicator
Power Indicator
Power Indicator

YST-SW012
6
YST-SW012
A model B, G models
L model
Power Indicator Power Indicator
Power Indicator

YST-SW012
7
YST-SW012
■DISASSEMBLY PROCEDURES
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet.
1. Removal of Front Grille Ass’y
* The Front Grille Ass’y is fixed to the cabinet with dowels at 5
locations.
As a flatblade screwdriver is used for removal, use special
care not to cause damage to the Cabinet Ass’y.
a. Using the flatblade screwdriver inserted in the gap between
the Front Grille Ass’y and the Cabinet Ass’y (bottom side first),
push up the Front Grille Ass’y. (Fig.1)
b. Remove the Front Grille Ass’y by lifting a metalblade up.
(Fig.1)
* When installing the Front Grille Ass’y, apply quick-drying bond
or the like to dowels and then fit them into dowel holes for
secure installation. (The Front Grille Ass’y will come off easily
if its dowels are fitted into dowel holes without applying quick-
drying bond or the like.)
2. Removal of Driver
a. Remove 4 screws (1) and remove the Driver. (Fig.1)
b. Disconnect the connector connected to the terminal of the
Driver. (Fig. 1)
3. Removal of Rear Panel Ass’y
a. Remove 8 screws (2) and remove the Rear Panel Ass’y.
(Fig.1)
* Screws (2) are identified with arrow marks ( ).
Fig. 1
1
2
2
Rear Panel Ass'y
Cabinet Ass'y
Front Grille Ass'y
Flatblade screwdriver
Metalblade
Dowel
Dowel
Driver
Connector

YST-SW012
8
YST-SW012
■BLOCK DIAGRAM
VR1
VOLUME
IC4A
-
++
+
IC5A IC5B
IC1
2
3
4
--
+
-
L.P.F.
6dB/oct
L.P.F.
12dB/oct
H.P.F.
12dB/oct
DRIVER
INPUT
PJ1
POWER
AMP
RY1
PROTECTION
POWER
SUPPLY
D1
F1 T1
POWER
SW5
4
82
26
1
9
8
10
+B
+B
-B
-B
IC6
Q5, 6
D4, 5, 22, 23
Q17- 20
D7, 25
R28
0.1
+15
-15
Q9, D2
REGULATOR
Q10, D3
A.N.I.C
LIMITER
Fig. 2
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 the Rubber Sheet and Cloth. (Fig. 2)
Rubber Sheet and Cloth

YST-SW012
9
A
1
2
3
4
5
6
7
BCDEFGH I J
VOLUME
10
0
INPUT
MAIN (3) P.C.B. (Side A)
Circuit No. U, C, T, R, A, L K, B, G
C78 X O
J42 X O
L1 X O
DRIVER
AC IN
MAIN (1) P.C.B.
POWER
MAIN (5) P.C.B.
BE
BE
BE
WH
YE
YE
RE
RE
BR
BR
U, C, A, B, G models
R, T, K, L models
MAIN (7) P.C.B.
MAIN (10) P.C.B.
(Side A)
MAIN (9) P.C.B.
(Side A)
MAIN (2) P.C.B.
WH BE
BE
WH
BE
WH
BE
WH
U, C, A, B, G models
R, T, K, L models R, T, K, L models
VO LTAG E
SELECTOR
220V-240V110V-120V
RE
RE
RE
RE
BL
RE
RE
BL
BL
WH
SP-
SP+
RE
Ref. no. Location
D1 J2
D2 H4
D3 I4
D4 H2
D5 H2
D6 G2
D7 F2
D8 C3
D22 G2
D23 G2
• Semiconductor Location
Ref. no. Location
D24 J3
D25 F3
D28 I3
D29 I3
IC1 H2
IC4 B3
IC5 B2
IC6 G3
Q1 F3
Q2 F3
Ref. no. Location
Q5 G3
Q6 G3
Q9 H4
Q10 I4
Q17 F3
Q18 F3
Q19 F3
Q20 F3
1
9
19
1
19
10
-V
-15
+15
E
MAIN
-V
-15
+15
E
MAIN
POWER
INDICATOR
(Side A)(Side A)
(Side A)
(Side A)
ON OFF
■PRINTED CIRCUIT BOARD Lead Free Solder Used

2
ABCDEFGH I J
1
3
4
5
7
YST-SW012
6
10
■SCHEMATIC DIAGRAM
★All voltages are measured with a 10MΩV DC electronic volt meter.
★Components having special characteristics are marked sand must be replaced
with parts having specifications equal to those originally installed.
★Schematic diagram is subject to change without notice.
IC1: STK404-070 60W
AF Power Amp
13245678910
R1 R4
R5
C1 C2
D1
TR3
TR5
R3 R6
TR4
SUB
R2
TR1 TR2
TR6
TR7
TR8
1
10
STK404-070 60W
1
9
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SB1642
2SD2531
1SR139,400
1SS133,176
MTZJ15C
MTZJ24B
MTZJ5.6B
2SA970
2SC2240
2SC2878
µPC4570HA-A
Anode
Cathode
ECBBCE
RBV-402
IC4~6: µPC4570HA-A
Dual OP-Amp
Vcc Vo 1 -Vm 1 +Vm 1 V EE +Vm 2 -Vm 2 Vo 2 Vcc
1234 567 89
++--
12
+
–
-35.2
AC 52.0
0.2
0.2
0.2
0.2
0.2
0
00
0
0
0
0.2
0.2
35.0 35.0
35.1
-8.1
0
0
0
0
14.5
-14.5
0
0
0
0
0
15.0
29.4
29.4
-30.7 35.0
14.5
-15.1
-14.5
-29.5-29.6
0
0
23.6
1.3
0.1
-8.0
1.3
1.3
1.3
0
0.7
0.7 0.8
0
0
0.2
0.2
0.2
-34.9 -35.2
35.1
0 0
1.1
-1.1
1.7
14.5
0
0
0
-1.9
0
14.5
14.5
-14.6
-14.6
0
0
0
0
0
0
0
0
0
L.P.F.
L.P.F.
DRIVER
R, T, K, L models
MAIN (1)
MAIN (3)
MAIN (10)
MAIN (7)
MAIN (5)
MAIN (2)
MAIN (9)
VOLUME
H.P.F.
POWER AMP
A.N.I.C
LIMITER
PROTECTION
POWER
SUPPLY
REGULATOR
POWER
INPUT
U, C, A, B, G models

YST-SW012
11
YST-SW012
ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS:
PARTS LIST
■ELECTRICAL PARTS
C.A.EL.CHP : CHIP ALUMI.ELECTROLYTIC CAP
C.CE : CERAMIC CAP
C.CE.ARRAY : CERAMIC CAP ARRAY
C.CE.CHP : CHIP CERAMIC CAP
C.CE.ML : MULTILAYER CERAMIC CAP
C.CE.M.CHP : CHIP MULTILAYER CERAMIC CAP
C.CE.SAFTY : RECOGNIZED CERAMIC CAP
C.CE.TUBLR : CERAMIC TUBULAR CAP
C.CE.SMI : SEMI CONDUCTIVE CERAMIC CAP
C.EL : ELECTROLYTIC CAP
C.MICA : MICA CAP
C.ML.FLM : MULTILAYER FILM CAP
C.MP : METALLIZED PAPER CAP
C.MYLAR : MYLAR FILM CAP
C.MYLAR.ML : MULTILAYER MYLAR FILM CAP
C.PAPER : PAPER CAPACITOR
C.PLS : POLYSTYRENE FILM CAP
C.POL : POLYESTER FILM CAP
C.POLY : POLYETHYLENE FILM CAP
C.PP : POLYPROPYLENE FILM CAP
C.TNTL : TANTALUM CAP
C.TNTL.CHP : CHIP TANTALUM CAP
C.TRIM : TRIMMER CAP
CN : CONNECTOR
CN.BS.PIN : CONNECTOR,BASE PIN
CN.CANNON : CONNECTOR,CANNON
CN.DIN : CONNECTOR,DIN
CN.FLAT : CONNECTOR,FLAT CABLE
CN.POST : CONNECTOR,BASE POST
COIL.MX.AM : COIL,AM MIX
COIL.AT.FM : COIL,FM ANTENNA
COIL.DT.FM : COIL,FM DETECT
COIL.MX.FM : COIL,FM MIX
COIL,OUTPT : OUTPUT COIL
DIOD.ARRAY : DIODE ARRAY
DIODE.BRG : DIODE BRIDGE
DIODE.CHP : CHIP DIODE
DIODE.VAR : VARACTOR DIODE
DIOD.Z.CHP : CHIP ZENER DIODE
DIODE.ZENR : ZENER DIODE
DSCR.CE : CERAMIC DISCRIMINATOR
FER.BEAD : FERRITE BEADS
FER.CORE : FERRITE CORE
FET.CHP : CHIP FET
FL.DSPLY : FLUORESCENT DISPLAY
FLTR.CE : CERAMIC FILTER
FLTR.COMB : COMB FILTER MODULE
FLTR.LC.RF : LC FILTER,EMI
GND.MTL : GROUND PLATE
GND.TERM : GROUND TERMINAL
HOLDER.FUS : FUSE HOLDER
IC.PRTCT : IC PROTECTOR
JUMPER.CN : JUMPER CONNECTOR
JUMPER.TST : JUMPER,TEST POINT
L.DTCT : LIGHT DETECTING MODULE
L.EMIT : LIGHT EMITTING MODULE
LED.DSPLY : LED DISPLAY
LED.INFRD : LED,INFRARED
MODUL.RF : MODULATOR,RF
PHOT.CPL : PHOTO COUPLER
PHOT.INTR : PHOTO INTERRUPTER
PHOT.RFLCT : PHOTO REFLECTOR
PIN.TEST : PIN,TEST POINT
PLST.RIVET : PLASTIC RIVET
R.ARRAY : RESISTOR ARRAY
R.CAR. : CARBON RESISTOR
R.CAR.CHP : CHIP RESISTOR
R.CAR.FP : FLAME PROOF CARBON RESISTOR
R.FUS : FUSABLE RESISTOR
R.MTL.CHP : CHIP METAL FILM RESISTOR
R.MTL.FLM : METAL FILM RESISTOR
R.MTL.OXD : METAL OXIDE FILM RESISTOR
R.MTL.PLAT : METAL PLATE RESISTOR
RSNR.CE : CERAMIC RESONATOR
RSNR.CRYS : CRYSTAL RESONATOR
R.TW.CEM : TWIN CEMENT FIXED RESISTOR
R.CEMENT : CEMENT RESISTOR
SCR.BND.HD : BIND HEAD B-TITE SCREW
SCR.BW.HD : BW HEAD TAPPING SCREW
SCR.CUP : CUP TITE SCREW
SCR.TERM : SCREW TERMINAL
SCR.TR : SCREW,TRANSISTOR
SUPRT.PCB : SUPPORT,P.C.B.
SURG.PRTCT : SURGE PROTECTOR
SW.TACT : TACT SWITCH
SW.LEAF : LEAF SWITCH
SW.LEVER : LEVER SWITCH
SW.MICRO : MICRO SWITCH
SW.PUSH : PUSH SWITCH
SW.RT.ENC : ROTARY ENCODER
SW.RT.MTR : ROTARY SWITCH WITH MOTOR
SW.RT : ROTARY SWITCH
SW.SLIDE : SLIDE SWITCH
TERM.SP : SPEAKER TERMINAL
TERM.WRAP : WRAPPING TERMINAL
THRMST.CHP : CHIP THERMISTOR
TR.CHP : CHIP TRANSISTOR
TR.DGT : DIGITAL TRANSISTOR
TR.DGT.CHP : CHIP DIGITAL TRANSISTOR
TRANS : TRANSFORMER
TRANS.PULS : PULSE TRANSFORMER
TRANS.PWR : POWER TRANSFORMER ASS’Y
TUNER.AM : TUNER PACK,AM
TUNER.FM : TUNER PACK,FM
TUNER.PK : FRONT-ENDTUNER PACK
VR : ROTARY POTENTIOMETER
VR.MTR : POTENTIOMETER WITH MOTOR
VR.SW : POTENTIOMETER WITH ROTARY SW
VR.SLIDE : SLIDE POTENTIOMETER
VR.TRIM : TRIMMER POTENTIOMETER
■WARNING
●Components having special characteristics are marked sand must be replaced with parts having specifications equal to
those originally installed.

YST-SW012
12
YST-SW012
✻New Parts ✻New Parts
* WG587200 P.C.B. UC
* WG587300 P.C.B. RTL
* WG587400 P.C.B. K
* WG587500 P.C.B. A
* WG587600 P.C.B. BG
CB3 VB390100 CN.BS.PIN 5P
sCB4 VG879900 CN.BS.PIN 2P
sCB5‑6 WC050700 CLIP.FUSE EYF‑52BCY RTKL
sCB7‑8 WC050700 CLIP.FUSE EYF‑52BCY
CB9‑10 VT658100 TERM.WRAP 352‑TX119
C1 VE326000 C.MYLAR 0.1uF50V
C2 VE327100 C.MYLAR 0.82uF50V
C4 UR867100 C.EL 10uF50V
C5 UA654220 C.MYLAR 0.022uF50VJ
C6 UR867100 C.EL 10uF50V
C7 UA655330 C.MYLAR 0.33uF50VJ
C8 UA655120 C.MYLAR 0.12uF50VJ
C9 UA654100 C.MYLAR 0.01uF50VJ
C10‑11 UR867100 C.EL 10uF50V
C12 UR867470 C.EL 47uF50V
C13 VE326000 C.MYLAR 0.1uF50V
C14 UR868100 C.EL 100uF50V
C15 UR838100 C.EL 100uF16V
C16 UR867100 C.EL 10uF50V
C17 UA655180 C.MYLAR 0.18uF50VJ
C18 UA654330 C.MYLAR 0.033uF50VJ
C19 FG652100 C.CE 100pF50V
C21 UA653330 C.MYLAR 3300pF50VJ
C25‑26 VT898000 C.MYLAR 0.1uF100V
C27 UA655180 C.MYLAR 0.18uF50VJ
C28 UR867100 C.EL 10uF50V
C29 UR867220 C.EL 22uF50V
C30‑32 UR867220 C.EL 22uF50V
C37 UA655470 C.MYLAR 0.47uF50VJ
C38 UA653680 C.MYLAR 6800pF50VJ
sC55 WB121400 C.CE.SAFTY 0.01uF295V
C57 UR868100 C.EL 100uF50V
C58‑59 V6476700 C.EL 4700uF50V
C72 UR867100 C.EL 10uF50V
C74‑75 UA654150 C.MYLAR 0.015uF50VJ
C76 UR838100 C.EL 100uF16V
C77 UR867220 C.EL 22uF50V
C78 FG652220 C.CE 220pF50V KBG
C79 FG652100 C.CE 100pF50V
C81 FG644100 C.CE 0.01uF50V
sD1 VC971500 DIODE.BRG RBV‑4024A200V
sD2 VG440900 DIODE.ZENR MTZJ15C15V
sD3 VG440900 DIODE.ZENR MTZJ15C15V
P.C.B. MAIN P.C.B. MAIN
D4 VD631600 DIODE 1SS133,176
D5 VD631600 DIODE 1SS133,176
D6 VD631600 DIODE 1SS133,176
D7 VG442500 DIODE.ZENR MTZJ24B24V
* D8 WG613900 LED 333GD/T5GREEN
D22‑23 VD631600 DIODE 1SS133,176
D24 VU264100 DIODE 1SR139,400
D25 VD631600 DIODE 1SS133,176
sD28‑29 VG437700 DIODE.ZENR MTZJ5.6B5.6V
sF1 WC804600 FUSE 1.6A125V
UCRTKL
sF1 VV335000 FUSE 0.4A250V ABG
sF2 VV335000 FUSE 0.4A250V RTKL
G1 V5995800 PLATE.GND
sIC1 X3587A00 IC STK404‑07060W
IC4‑6 XB247A00 IC uPC4570HA‑A
PJ1 WC871000 JACK.PIN 1PMSP‑241V‑01NI
PN1 WB213200 PIN L=70WB21320
Q1 iC224030 TR 2SC2240GR,BL
Q2 iA097030 TR 2SA970GR,BL
Q5 WF612700 TR 2SC2240GR
Q6 iA097040 TR 2SA970GR
Q9 V6896700 TR 2SD2531
Q10 V6896500 TR 2SB1642
Q17‑18 iC224030 TR 2SC2240GR,BL
Q19 iC287820 TR 2SC2878A,B
Q20 iC287820 TR 2SC2878A,B
R1 HV756150 R.CAR.FP 1.5KΩ1/4W
R5 HV756120 R.CAR.FP 1.2KΩ1/4W
R28 V6022600 R.CEMENT 0.1Ω3W
R39 VC760500 R.MTL.OXD 470Ω2W
sR45‑46 HV753100 R.CAR.FP 1Ω1/4W
R47 VC751900 R.MTL.OXD 0.22Ω2W
R48 HV754100 R.CAR.FP 10Ω1/4W
* R66 WG727400 R.MTL.FLM 2.7KΩ1/4W
* R67 WG731200 R.MTL.FLM 100KΩ1/4W
R95 HV755100 R.CAR.FP 100Ω1/4W
sR126 HV753100 R.CAR.FP 1Ω1/4W
sRY1 V5966300 RELAY DS24D2‑OS(M)
ST1‑3 WA789600 SCR.TERM M3
*sSW5 WG803400 SW.PUSH PS4E‑A‑040‑NP
sSW6 WC906700 SW.SLIDE SDKPA40300 RTKL
VR1 WC595500 VR A5KΩ
WD192100 CUSHION
Ref. No. Part No. Description Markets Ref. No. Part No. Description Markets

YST-SW012
13
YST-SW012
10mm
HJ35
1/4W Type
5mm
HF85
1/6W Type
HF45
1/4W Type
Value 1/4W Type Part No. 1/6W Type Part No.
10 kΩHF45 7100 HF45 7100
11 kΩHF45 7110 HF45 7110
12 kΩHJ35 7120 HF85 7120
13 kΩHF45 7130 HF45 7130
15 kΩHF45 7150 HF45 7150
18 kΩHF45 7180 HF45 7180
22 kΩHF45 7220 HF45 7220
24 kΩHF45 7240 HF45 7240
27 kΩHJ35 7270 HF85 7270
30 kΩHF45 7300 HF45 7300
33 kΩHF45 7330 HF45 7330
36 kΩHF45 7360 HF45 7360
39 kΩHF45 7390 HF45 7390
47 kΩHF45 7470 HF45 7470
51 kΩHF45 7510 HF45 7510
56 kΩHF45 7560 HF45 7560
62 kΩHF45 7620 HF45 7620
68 kΩHF45 7680 HF45 7680
82 kΩHF45 7820 HF45 7820
91 kΩHF45 7910 HF45 7910
100 kΩHF45 8100 HF45 8100
110 kΩHF45 8110 HF45 8110
120 kΩHF45 8120 HF45 8120
150 kΩHF45 8150 HF45 8150
180 kΩHF45 8180 HF45 8180
220 kΩHJ35 8220 HF85 8220
270 kΩHF45 8270 HF45 8270
300 kΩHF45 8300 HF45 8300
330 kΩHF45 8330 HF45 8330
390 kΩHJ35 8390 HF85 8390
470 kΩHF45 8470 HF45 8470
560 kΩHJ35 8560 HF85 8560
680 kΩHJ35 8680 HF85 8680
820 kΩHJ35 8820 HF85 8820
1.0 MΩHF45 9100 HF45 9100
1.2 MΩHJ35 9120 ❊
1.5 MΩHJ35 9150 HF85 9150
1.8 MΩHJ35 9180 HF85 9180
2.2 MΩHJ35 9220 HF85 9220
3.3 MΩHJ35 9330 HF85 9330
3.9 MΩHJ35 9390 ❊
4.7 MΩHJ35 9470 HF85 9470
Value 1/4W Type Part No. 1/6W Type Part No.
1.0 ΩHJ35 3100 HF85 3100
1.8 ΩHJ35 3180 ❊
2.2 ΩHJ35 3220 HF85 3220
3.3 ΩHJ35 3330 HF85 3330
4.7 ΩHJ35 3470 HF85 3470
5.6 ΩHJ35 3560 HF85 3560
10 ΩHF45 4100 HF45 4100
15 ΩHJ35 4150 HF85 4150
22 ΩHF45 4220 HF45 4220
27 ΩHJ35 4270 HF85 4270
33 ΩHF45 4330 HF45 4330
39 ΩHJ35 4470 HF85 4390
47 ΩHF45 4470 HF45 4470
56 ΩHF45 4560 HF45 4560
68 ΩHF45 4680 HF45 4680
75 ΩHF45 4750 HF45 4750
82 ΩHF45 4820 HF45 4820
91 ΩHF45 4910 HF45 4910
100 ΩHF45 5100 HF45 5100
110 ΩHJ35 5110 HF85 5110
120 ΩHF45 5120 HF45 5120
150 ΩHF45 5150 HF45 5150
160 ΩHJ35 5160 ❊
180 ΩHF45 5180 HF45 5180
200 ΩHF45 5200 HF45 5200
220 ΩHF45 5220 HF45 5220
270 ΩHF45 5270 HF45 5270
330 ΩHF45 5330 HF45 5330
390 ΩHF45 5390 HF45 5390
430 ΩHF45 5430 HF45 5430
470 ΩHF45 5470 HF45 5470
510 ΩHF45 5510 HF45 5510
560 ΩHF45 5560 HF45 5560
680 ΩHF45 5680 HF45 5680
820 ΩHF45 5820 HF45 5820
910 ΩHF45 5910 HF45 5910
1.0 kΩHF45 6100 HF45 6100
1.2 kΩHF45 6120 HF45 6120
1.5 kΩHF45 6150 HF45 6150
1.8 kΩHF45 6180 HF45 6180
2.0 kΩHJ35 6200 HF85 6200
2.2 kΩHF45 6220 HF45 6220
2.4 kΩHJ35 6240 HF85 6240
2.7 kΩHF45 6270 HF45 6270
3.0 kΩHF45 6300 HF45 6300
3.3 kΩHF45 6330 HF45 6330
3.6 kΩHJ35 6360 HF85 6360
3.9 kΩHF45 6390 HF45 6390
4.7 kΩHF45 6470 HF45 6470
5.1 kΩHF45 6510 HF45 6510
5.6 kΩHF45 6560 HF45 6560
6.8 kΩHF45 6680 HF45 6680
8.2 kΩHF45 6820 HF45 6820
9.1 kΩHF45 6910 HF45 6910
Parts List for Carbon Resistors
❊: Not available

ABCDE
1
2
3
4
5
6
7
YST-SW012
14
■EXPLODED VIEW
R, T, K, L models
200
201
1
2
3
4-2
4-3
4-4
4-5
4-11
4-11
4-16
4-17
4-18
4-19
4-20
4-24
4-24
4-23
4-28
4-33
6
21
21
21
4-1 (2)
4-1 (1)
4-35
4-1 (9)
4-34
4-1 (3)
4-34
4-34
4-34
4-38
4-31
4-32
4-34
4-38
4-1 (7)
4-1 (10)
U, C, A, B, G models
R, T, K, L models
4-1 (5)
4-1 (4)
U, C, A, B, G models
R, T, K, L models
4-21
4-21
4-21
4-21
4-34

YST-SW012
15
YST-SW012
■MECHANICAL PARTS
* 1 WG568200 CABINETASS'Y CH
* 1 WG568100 CABINETASS'Y BL
* 1 WG568000 CABINETASS'Y SI
2 X5399A00 DRIVERWOOFER 20cm6Ω JA2025
* 3 WG569300 FRONTGRILLEASS'Y CH,BL
* 3 WG569200 FRONTGRILLEASS'Y SI
* 4‑1 WG587200 P.C.B.ASS'Y UC
* 4‑1 WG587300 P.C.B.ASS'Y RTL
* 4‑1 WG587400 P.C.B.ASS'Y K
* 4‑1 WG587500 P.C.B.ASS'Y A
* 4‑1 WG587600 P.C.B.ASS'Y BG
*s4‑2 X5313B00 POWERTRANSFORMER UC
*s4‑2 X5314B00 POWERTRANSFORMER RTKL
*s4‑2 X5315B00 POWERTRANSFORMER A
*s4‑2 X5316B00 POWERTRANSFORMER BG
s4‑3 WC906100 POWERCABLE 2m UC
s4‑3 WD042000 POWERCABLE 2m R
s4‑3 WC906200 POWERCABLE 2m T
s4‑3 WC906300 POWERCABLE 2m K
s4‑3 WC906400 POWERCABLE 2m A
s4‑3 WC906500 POWERCABLE 2m B
s4‑3 WC906600 POWERCABLE 2m GL
4‑4 CB072750 CORDSTOPPER SR‑4N‑4
4‑5 WB408000 BINDINGTIE GT‑100M
* 4‑11 WG570500 REARPANEL UC
* 4‑11 WG570600 REARPANEL RTL
* 4‑11 WG570700 REARPANEL A
* 4‑11 WG570800 REARPANEL BG
4‑16 WC738200 POWERKNOB
4‑17 WC757900 VOLUMEKNOB
4‑18 WC738400 COVER P.SW
4‑19 WC738100 COVER TERMINAL
4‑20 WC738800 PACKING COVERTERMINAL
4‑21 WC785200 PACKING 6x202t=1
4‑23 WC758000 PACKING COVERP.SW
4‑24 WC739000 BUSH
4‑28 WC869800 GASKET RTKL
* 4‑31 WF765200 PWHEADS‑TIGHTSCREW 4x8‑10MFZN2B3
4‑32 WE774400 BINDHEADB‑TIGHTSCREW 3x8MFZN2B3
4‑33 WE774600 SCREWIC 3x18MFZN2W3
4‑34 WF268000 BINDHEADP‑TIGHTSCREW 3x10MFZN2B3
4‑35 VT669300 PWHEADB‑TIGHTSCREW 3x8‑8MFC2
4‑38 WE983600 BINDHEADSCREW 3x8MFZN2B3
6 WC788700 EMBLEM
21 WE955200 BINDHEADTAPPINGSCREW 4x20MFZN2B3
ACCESSORIES
200 WC731500 NONSKIDPAD M32t24pcs/set
201 WC947800 SUBWOOFERCABLE 1P5m1pc
✻New Parts
Ref.
No. PartNo. Description Remarks Markets

YST-SW012