Yamaha YST-SW105 User manual

YST-SW105
SERVICE MANUAL
SUBWOOFER SYSTEM
YST-SW105
100766
■CONTENTS
TO SERVICE PERSONNEL .......................................... 1
SPECIFICATIONS.......................................................... 1
INTERNAL VIEW ........................................................... 2
REAR PANELS .............................................................. 2
DISASSEMBLY PROCEDURES ................................... 3
CONFIRMATION OF AUTO STANDBY OPERATION ...... 4
BLOCK DIAGRAM......................................................... 4
PRINTED CIRCUIT BOARD ...................................... 5~7
SCHEMATIC DIAGRAM ................................................ 8
PARTS LIST............................................................. 9~15
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-SW105
P.O.Box 1, Hamamatsu, Japan

YST-SW105
235 (9-5/16")260 (10-1/4")20
(3/4")
32
(1-1/4")312 (12-1/4")
365 (14-7/20")
Unit : mm (inch)
1
WALL
OUTLET EQUIPMENT UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
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.
■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 ohm shunted
by 0.15µF.
●Leakage current must not exceed 0.5mA.
●Be sure to test for leakage with the AC plug in both polarities.
■SPECIFICATIONS
Type.......... Advanced Yamaha Active Servo Technology
Output Power ................100 W/100 Hz, 5 Ω10% T.H.D.
Input Sensitivity (50 Hz, 100 W/5Ω, L+R)
INPUT 1 (SP) ....................................................... 1.4 V
INPUT 2 (PJ)...................................................... 65 mV
Input Impedance
INPUT 1 (SP) .....................................................2.2 kΩ
INPUT 2 (PJ)....................................................... 12 kΩ
Frequency Response ............................... 30 Hz–200Hz
Driver Unit ..............................................20 cm (8") cone
magnetic shielding type x 1
Input Section
INPUT 1.............................................Speaker terminal
INPUT 2................................................... RCA pin jack
Power Supply
U, C models ........................................ AC120V, 60Hz
A model ............................................... AC240V, 50Hz
B, G models ........................................ AC230V, 50Hz
R, T models ...............AC110/120/220/240V, 50/60Hz
Power Consumption............................................... 80 W
Standby Power Consumption .............................. 0.8 W
Dimensions (W x H x D) ................ 235 x 365 x 312 mm
(9-5/16" x 14-7/20" x 12-1/4")
Weight ........................................... 9.5 kg (20 lbs. 15 oz.)
Finish
All models ...........................Black color / Cherry color
Accessory..............................................Nonskid Pad x 4
U ........ U.S.A. model C .... Canada model
G........ Europe model B .... British model
A ........ Australia model R .... General model
T ........ China model
✻Specifications are subject to change without notice due
to product improvements.
• DIMENSIONS

YST-SW105
1
2
3
4
5
Right side internal view
■INTERNAL VIEW
1MAIN P. C. B. (4)
2MAIN P. C. B. (3)
3MAIN P. C. B. (1)
4MAIN P. C. B. (2)
5Power Transformer
■REAR PANELS
U, C models R model A model
B, G model T model
2

YST-SW105
Extension flexible flat cable
Fig. 4
3
3
3
3
CB3
CB9
Apply rapid cures bond
Fig. 6
Apply rapid cures bond
Fig. 5
2
2
Front Panel Ass'y Main P.C.B. (4)
Fig. 3
1Fig. 2
Fig. 1
3
■DISASSEMBLY PROCEDURES
(Remove parts in the order as numbered.)
●For exchanging the driver unit
1. Removal of Front Grille
The front grille is fixed to the cabinet with dowels at 4 locations.
As a screwdriver (for slotted head screw) is used for removal, use
special care not to cause damage to the cabinet.
a. Apply the block to the rear panel so as to avoid damage to the
Terminal of the rear panel.
b. Use the screwdriver inserted in the gap between the 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. Removal of Driver unit
a. Remove 4 screws (1) in Fig. 2, and remove the Driver unit.
b. Remove the cable cord.
●For repairing P.C.B.
Repairing P.C.B. is possible without removing front grille.
1. Removal of Front Panel Ass'y
Remove 2 screws (2) and then remove the Front Panel Ass'y in
Fig. 3.
* Use an Allen wrench (3 mm) to unscrew the Front Panel Ass'y.
2. Removal of Rear Panel
Remove 12 screws (3) in Fig. 4, and remove the rear panel. At
this time, disconnect the connector CB3 of MAIN P.C.B. (1).
* When removing the rear panel, replace the packing.
3. P.C.B. Operation Check
a. Disconnect the connector CB9 of MAIN P.C.B. (4).
b. Connect the connector CB3 of MAIN P.C.B. (1) and CB9 of MAIN
P.C.B. (4) by using an extension flexible flat cable. (Fig. 4)
Extension flexible flat cable : V7113100 (9P, 450 mm)
●Installation of power switch
Rapid cures bond (such as 5 minutes epoxy) is required to fix the
power switch.
As shown in Fig. 5, apply rapid cures bond (such as 5 minutes
epoxy) to the power switch (the area which contacts the rear
panel), insert it in the rear panel and make sure it is fixed.
(Inserting the power switch in the rear panel only would not be
sufficient for its secure installation.)
●Precaution for installation of power cord
After connecting the power cord, be sure to apply the rapid cures
bond (such as 5 minutes epoxy) to the cord stopper as shown in
Fig. 6.
Glue List
Place Name
Cord stopper 5 minutes epoxy or 2051 (Revertex Finewaters
SDN.BHD.) or VYLOK 917DH (National Starch &
Chemical (M) SDM.BHD.)
Power switch 5 minutes epoxy or Diabond 1620B

YST-SW105
LIMITER
MUSIC
BASS
SW4
MOVIE
IC3
REGULATOR
POWER SUPPLY
D2
SUB
POWER SUPPLY
D11
Q11
T1
D17
D18
Q15
D9
STANDBY/ON
SW1
+15
+B
-15
-B
Q9
Q10
RY2
F1
PROTECTION
0.1
SPEAKER
RY1
D6
2
IC2
2
4
3
IC7B
IC7A
L.P.F
12dB/oct
HIGH
CUT
VR2
8
6
7
VR3
VOLUME
L.P.F
6dB/oct
7
6
5
IC1B
IC1A 1
2
3
MUSIC
SENSOR
IC4
TIMER
IC5
+
8
4
6
7
3
AUTO
STANDBY
SW2
OFF
AUTO POWER ON/OFF CIRCUIT
Q5, 6, 7, 8
Q16, 18
D4,D5
+
-+
-+
-
+
-+
-
-
+
+
-
-
+
L
R
L
R
L
R
INPUT 1
OUTPUT
INPUT 2
Q12
R60
C46
POWER
AMP
4
H.P.F
12dB/oct
H
LIC12
REGULATOR Q13, 14
D15
R, T ONLY
REGULATOR
POWER
SW5
A.N.I.C
IC6, 8
Q20
L.P.F
6dB/oct
3
14
+C18 +C17
+15
■BLOCK DIAGRAM
4
■CONFIRMATION OF AUTO STANDBY OPERATION
Setting
1) Turn off the power switch.
2) In order to shorten the time required for operation
check; connect a 10kΩresistor at both ends of R60 on
the MAIN P.C.B. (2).
3) Connect the output signal from the signal generator to
the INPUT 2 of the unit.
4) Set the signal generator for the sine wave of 100Hz,
8mV.
5) Turn on the power switch.
Confirmation
1) Set the AUTO STANDBY switch to the LOW position.
AUTO
STANDBY
OFF HIGH
LOW
2) Turn on the STANDBY/ON switch.
The display LED lights up (green) and its color changes
to red after 5 to 10 seconds.
3) Turn off the STANDBY/ON switch.
The display LED goes off.
4) Set the AUTO STANDBY switch to the HIGH position.
AUTO
STANDBY
OFF HIGH
LOW
5) Turn on the STANDBY/ON switch.
The display LED lights up (green) and its color remains
unchanged even after time have elapsed.
6) Turn off the STANDBY/ON switch.
The display LED goes off.
After confirmation
1) Turn off the power switch.
2) Disconnect the 10kΩresistor connected to both ends of
R60.

YST-SW105
ABCDE
1
2
3
4
5
6
7
POWER
SW5
To MAIN (2)
MAIN P. C. B. (5)
GY OR
19
STANDBY / ONB.A.S.S.HIGH CUTVOLUME
From MAIN (1)
MAIN P. C. B. (4)
TOVL E MAIN BASS +V2 +15 -15 PWS VCC
19
118
9
15
From MAIN (6)
From MAIN (2)
From MAIN (3)
To MAIN (4)
SPEAKER
MAIN P. C. B. (1)
RE RE
VCC
E
PWS
+V1
VCC
PWS
-15
+15
+V2
BASS
MAIN
E
TOVL
BL
-15
+15
+15
TOVL
E
E
SP+
SP- +
ｰ
5
■PRINTED CIUCUIT BOARD (Foil side)

YST-SW105
ABCDE
1
2
3
4
5
6
7
18
From MAIN (2)
To MAIN (1)
MAIN P. C. B. (3)
AUTO
STANDBY
LOWHIGH OFF
INPUT 2
OUTPUT / INPUT 1
+––+
E E TOVL +15 +15 -15
SWL
SWH2
SWH1
SO
E
1189
From MAIN (5)
From MAIN (7)(R, T models)
From MAIN (8)
(J, U, C, A, B, G models)
From MAIN (3)
To MAIN (1)
MAIN P. C. B. (2)
SWL SWH2 SWH1 SO E +V1 PWS E VCC
WH
BE
OR
GY
R60
1MΩ
6
■PRINTED CIUCUIT BOARD (Foil side)

YST-SW105
ABCDE
1
2
3
4
5
6
7
(R, T models)
To MAIN (7)
MAIN P. C. B. (9)
VOLTAGE SELECTOR
YE
BE
GR
RE
BR
BL
To MAIN (1)
POWER TRANSFORMER
(J, U, C, A, B, G models)
From MAIN (2)
MAIN P. C. B. (8) MAIN P. C. B. (6)
RE
WH
BE RE
BL
To MAIN (1)
POWER TRANSFORMER
From MAIN (9)
MAIN P. C. B. (7) MAIN P. C. B. (6)
RE
WH
RE
BL
YE
BR
GR
BE
BE
RE
BL
(R, T models)
7
■PRINTED CIUCUIT BOARD (Foil side)

A
1
2
3
4
5
6
7
8
9
B C D E F G H I J K L
YST-SW105
HAll v oltage are measured with a 10MΩ /V DC
electric volt meter.
HComponents ha ving special characteristics are
marked sand must be replaced with parts
having specifications equal to those originally
installed.
HSchematic diag ram is subject to change
without notice.
●電圧は、内部抵抗10MΩの電圧計で測定した
ものです。
●s印のある部品は、安全性確保部品を示して
います。部品の交換が必要な場合は、パーツ
リストに記載されている部品を使用してくだ
さい。
●本回路図は標準回路図です。改良のため予告
なく変更することがございます。
8
SCHEMATIC DIAGRAM
IC12 : NJM78L08A
Voltage Regulator
IC2 :TDA7293V
100W DMOS Audio Amp.
IC5 : M51848L
Protect
IC3 : µPC1237HA
Protect
IC4, 6, 7, 8 : µPC4570HA
OP Amp.
IC1 : NJM4558L
OP Amp.
BCEBCE
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SD2531
2SB1642
2SK3042SC4688 D3SBA20 S1NB20
2SC1815
2SA1015
2SC2240
2SA970
2SC2878
ECB
–
+~~~
+
~
–
1SS133
MTZ15C
MTZJ24B
MTZJ12C
µPC4570HA
Anode
Cathode 1
9
M51848L
µPC1237HA
NJM78L08A TDA7293V
1
8
NJM4558L
1
8
OUT
COM IN
SGD1
15
Vcc Vo1-Vm1+Vm1VEE +Vm2-Vm2Vo2Vcc
1 2 3 4 5 6 7 8 9
+ + --
1 2
VIN
VOUT
GND
1 2 3 4 8
+
–
+
–
65 7
OUT1
–IN1
+IN1
–Vcc
+IN2
–IN2
OUT2
+Vcc
2
3
4
10
9
1 8
6
5
7 11 13
14
12
15
OUT
+PWVsBUFFER DRV+Vs
-VsSTBY-GND -PWVs
BOOT
LOADER
BOOT
STRAP
CLIP DET
IN-
IN+
SGND
MUTE
STBY
MUTE
STBY
THERMAL
SHUTDOWN
S/C
PROTECTION
0
0
0
00
0
0
0
-14.7
-14.4-42.0
0
0
0
0
0 0
0
0
0
0
0
0
0
0 0 0
-14.4
0.7
14.8
14.8
14.7
14.1
0
45.6
41.8
14.8
25.3 0.8
6.6
6.6
6.1
0
0
0
0
0
0
0
7.9
0
0.2
0.2
5.6
5.6
11.9
11.8
11.8
0.7
1.4
3.9
3.9
6.7
6.8
7.9
0
0
1.4 6.6 7.9 7.9 5.3 4.7 4.7
5.0
0
-0.3 -0.3
0
00
0
0 0
0
0
0
0
0
0
0
0
0.1
7.3
7.9
0.1
0.6 1.9
00
0
00
-14.2
14.5
0
0
0
0
11.3 12.6
-45.7
16.1 45.6
45.6
0.4
-45.7
0
0
-1.8
14.7
14.7
14.0
11.4
-14.3
-14.3
3.3
2.2 0.8 0 2.0 0 0 0
6.0
15.2
-45.8
AC68.1
-14.4
0
14.7
AC11.9

YST-SW105
9
■WARNING
Components having special characteristics are marked sand must be
replaced with parts having specifications equal to those originally in-
stalled.
●Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL
PARTS List. For the parts No. of the carbon resistors, refer to last page.
ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS:
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 : CHIPRESISTOR
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.WW : WIRE WOUND 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
Note) Those parts marked with “#” are not included in the P.C.B. ass’y.
PARTS LIST
■ELECTRICAL PARTS

YST-SW105
10
* V7097000 P.C.B. MAIN UC
* V7097100 P.C.B. MAIN RT
* V7097200 P.C.B. MAIN A
* V7097300 P.C.B. MAIN BG
CB1 VB390200 CN.BS.PIN 6P
CB2 VB390000 CN.BS.PIN 4P
CB3 VB390500 CN.BS.PIN 9P
CB4 VB858400 CN.BS.PIN 5P
CB5 VP206500 HOLDER.FUS EYF‑52BCT RT
CB6 VP206500 HOLDER.FUS EYF‑52BCT RT
CB7 VP206500 HOLDER.FUS EYF‑52BCT UCRT
CB8 VP206500 HOLDER.FUS EYF‑52BCT UCRT
CB9 VB390500 CN.BS.PIN 9P
CB10 LB932020 CN.BS.PIN 2P
CB13 VP206500 HOLDER.FUS EYF‑52BCT ABG
CB14 VP206500 HOLDER.FUS EYF‑52BCT ABG
C1 UA654470 C.MYLAR 0.047uF50V
C2 FG612220 C.CE 220pF50V
C3 UR857100 C.EL 10uF35V
C4 FG612220 C.CE 220pF50V
C5 UA654220 C.MYLAR 0.022uF50V
C6 UR837100 C.EL 10uF16V
C7 UR837470 C.EL 47uF16V
C8 UR857100 C.EL 10uF35V
C9 UA653100 C.MYLAR 1000pF50V
C10 UR867100 C.EL 10uF50V
C11 UR867100 C.EL 10uF50V
C12 UR867220 C.EL 22uF50V
C13 UA655100 C.MYLAR 0.1uF50V
C14 FG652100 C.CE 100pF50V
C15 UR838100 C.EL 100uF16V
C18 UA654470 C.MYLAR 0.047uF50V
C19 VA761000 C.CE 22pF50V
C20 UR837100 C.EL 10uF16V
C21 UR837100 C.EL 10uF16V
C22 FG644100 C.CE 0.01uF50V
C23 UR828220 C.EL 220uF10V
C24 UR828100 C.EL 100uF10V
* C25 V6887300 COVER.CAP 0.1uFECQ‑E2104KF
* C26 V6887300 COVER.CAP 0.1uFECQ‑E2104KF
* C27 V7093400 C.EL 6800uF63V
* C28 V7093400 C.EL 6800uF63V
C29 UR867220 C.EL 22uF50V
C30 UR867220 C.EL 22uF50V
C31 UR867220 C.EL 22uF50V
C32 UR867220 C.EL 22uF50V
C33 UA655100 C.MYLAR 0.1uF50V
C34 UR837100 C.EL 10uF16V
C35 UR837100 C.EL 10uF16V
C36 UA655470 C.MYLAR 0.47uF50V
C40 UR749100 C.EL 1000uF25V UCABG
C42 FG644100 C.CE 0.01uF50V
C43 FG613100 C.CE 1000pF50V
C44 UR866100 C.EL 1uF50V
C45 UA654680 C.MYLAR 0.068uF50V
C46 UR838330 C.EL 330uF16V
C47 UR838220 C.EL 220uF16V
C48 UR778470 C.EL 470uF63V RT
sC49 VS741700 C.CE.SAFTY 0.01uF275V
C50 FG644100 C.CE 0.01uF50V
C51 UA654470 C.MYLAR 0.047uF50V
C61 VE327100 C.MYLAR.ML 0.82uF50V
C62 VE326200 C.MYLAR.ML 0.15uF50V
C63 VE326200 C.MYLAR.ML 0.15uF50V
C64 VE326200 C.MYLAR.ML 0.15uF50V
C65 UM417100 C.EL 10uF50V
C66 UM417100 C.EL 10uF50V
C74 UR837100 C.EL 10uF16V
C84 UR847100 C.EL 10uF25V RT
C100 UR838100 C.EL 100uF16V
C101 UA655470 C.MYLAR 0.47uF50V
sD1 VN011300 DIODE.BRG D3SBA204A200V
D2 VG440900 DIODE.ZENR MTZJ15C15V
D3 VG440900 DIODE.ZENR MTZJ15C15V
D4 VD631600 DIODE 1SS133,176
D5 VD631600 DIODE 1SS133,176
D6 VD631600 DIODE 1SS133,176
D7 VG442500 DIODE.ZENR MTZJ24B24V
D8 VD631600 DIODE 1SS133,176
D9 VD631600 DIODE 1SS133,176
D10 VD631600 DIODE 1SS133,176
D11 VR253700 DIODE.BRG S1NB20
1.0A200V
D12 VD631600 DIODE 1SS133,176
D13 VD631600 DIODE 1SS133,176
D16 VG440300 DIODE.ZENR MTZJ12C12V RT
D17 VD631600 DIODE 1SS133,176
D18 VS079300 LED SPR‑39MVW
D19 VD631600 DIODE 1SS133,176
*sF1 VS822700 FUSE T3.0A125V UCRT
sF2 KB002610 FUSE T800mA250V RT
sF3 KB002610 FUSE T800mA250V ABG
IC1 XM922A00 IC NJM4558L
* IC2 XZ745A00 IC TDA7293V100W
IC3 XF663A00 IC uPC1237HA
IC4 XB247A00 IC uPC4570HA
IC5 XP741A00 IC M51848L
IC6 XB247A00 IC uPC4570HA
IC7 XB247A00 IC uPC4570HA
IC8 XB247A00 IC uPC4570HA
IC12 iG160100 IC NJM78L08A8V
PJ1 VT666100 JACK.PIN 2P
Q5 iC1815I0 TR 2SC1815Y
Q6 iA1015I0 TR 2SA1015Y
Q7 iC224030 TR 2SC2240GR,BL
Q8 iA097030 TR 2SA970GR,BL
* Q9 V6896700 TR 2SD2531
* Q10 V6896500 TR 2SB1642
Q11 iC224030 TR 2SC2240GR,BL
Q12 iC224030 TR 2SC2240GR,BL
Q13 iC224030 TR 2SC2240GR,BL RT
Q14 VK801200 TR 2SC4688R,O RT
Q15 iC224030 TR 2SC2240GR,BL
Q16 iA097030 TR 2SA970GR,BL
Q18 iC287820 TR 2SC2878A,B
Q20 V3028000 FET 2SK304E
R3 HV756220 R.CAR.FP 2.2KΩ1/4W
R4 HV756220 R.CAR.FP 2.2KΩ1/4W
R12 HV756470 R.CAR.FP 4.7KΩ1/4W
R15 HV756470 R.CAR.FP 4.7KΩ1/4W
R28 V6022600 R.WW 0.1Ω  3W
R30 HV756100 R.CAR.FP 1KΩ1/4W
R31 HV756100 R.CAR.FP 1KΩ1/4W
R32 HV754680 R.CAR.FP 68Ω1/4W
* R39 VC761000 R.MTL.OXD 680Ω2W
R45 HV755270 R.CAR.FP 270Ω1/4W
R46 HV755270 R.CAR.FP 270Ω1/4W
Schm
Ref. PARTNO. Description Markets
✻New Parts
P. C. B. MAIN
Schm
Ref. PARTNO. Description
Markets
✻New Parts

YST-SW105
11
R48 HV753220 R.CAR.FP 2.2Ω1/4W
R62 HV753220 R.CAR.FP 2.2Ω1/4W UCABG
R66 HB026330 R.MTL.FLM 3.3KΩ1/4W
R67 HB028100 R.MTL.FLM 100KΩ1/4W
R79 HB027200 R.MTL.FLM 20KΩ1/4W
R80 HB027100 R.MTL.FLM 10KΩ1/4W
R81 HB027100 R.MTL.FLM 10KΩ1/4W
R82 HB027100 R.MTL.FLM 10KΩ1/4W
R96 HV756220 R.CAR.FP 2.2KΩ1/4W
R97 HV756220 R.CAR.FP 2.2KΩ1/4W
R100 HV753100 R.CAR.FP 1Ω1/4W
R129 HV754100 R.CAR.FP 10Ω1/4W
R130 HV754100 R.CAR.FP 10Ω1/4W
R131 HV755270 R.CAR.FP 270Ω1/4W
R132 HV755270 R.CAR.FP 270Ω1/4W
sRY1 VU161600 RELAY
DCOSA‑SS‑224DM3
sRY2 V2712300 RELAY DCSDT‑S‑112LMR RT
sRY2 VU349800 RELAY DCSDT‑SS‑112DM UCABG
SW1 VS066500 SW.PUSH SPPH13‑W
SW2 VD179500 SW.SLIDE SSSU12
SW4 VS066500 SW.PUSH SPPH13‑W
SW6 V7182300 VOLT.SELCT R8140213 RT
sT1 XV443A00 TRANS.PWR UC
sT1 XV445A00 TRANS.PWR ABG
sT1 XW607A00 TRANS.PWR RT
TE1 VT658100 TERM.WRAP 352‑TX119
TE2 VT658100 TERM.WRAP 352‑TX119
TE3 V4811400 TERM.SP 8P BG
TE3 VC313700 TERM.SP 8P UCRTA
VR2 V3582800 VR S10KΩ
VR3 V3582700 VR A5KΩ
V5995800 PLATE.GND RX‑V800
* V7235100 CON.GND JG‑11‑T
* V7113100 CN.ASSY 9P450mmC&C
* V7572400 HOLDER.LED LE56209‑0
Schm
Ref. PARTNO. Description Markets
✻New Parts
P. C. B. MAIN
Schm
Ref. PARTNO. Description
Markets
✻New Parts

YST-SW105
ABCDE
1
2
3
4
5
6
7
4-1 4-6
4-5
4-11
4-11
4-7
✻1
✻1 Adhesive is applied here.
3-2
3-1
5-8
5-20
5-17
5-18
5-17
5-18
5-5
21 5-1
5-21
5-36
21 5-15
5-11
5-38
5-23
21
5-34
5-38
5-33
21
21
13
5-37
5-7
5-6
5-19
5-22
5-1
5-1
5-1
5-32
5-32
5-32
5-1
5-1
5-35
5-35
5-24
5-12
5-39
5-1
5-1
5-16
5-13
5-14
5-35
5-25
2
11
22
12
21 1
203
3
R, T models
(9)
(1)
(6)
(7),(8)
(2)
(3)
(5)
(4)
12
■EXPLODED VIEW

YST-SW105
■MECHANICAL PARTS
✻New Parts
Ref.
No. PART NO. Description Remarks Markets
* 1 V7292200 CABINETASS'Y BL
* 1 V7292300 CABINETASS'Y CH
* 2 XZ951A00 LOUDSPEAKERJA2165 20cm6Ω
* 3 V7292400 FRONTGRILLEASS'Y BL
* 3 V7292500 FRONTGRILLEASS'Y CH
3‑1 V2192200 EMBLEM YAMAHA
3‑2 VP161000 PUSHNUT SPN1.5
* 4‑1 V7108500 FRONTPANEL BL UCRTABG
* 4‑1 V7108700 FRONTPANEL CH UCRTABG
* 4‑5 V7240400 SHIELDSHEET
* 4‑6 V6964200 SWITCHKNOB BL
* 4‑6 V6964300 SWITCHKNOB CH
* 4‑7 V6964400 VOLUMEKNOB BL
* 4‑7 V6964500 VOLUMEKNOB CH
4‑11 EP600280 BINDHEADP‑TITESCREW 3x8ZMC2‑Y
* 5‑1 V7097000 P.C.B.ASS'Y MAIN UC
* 5‑1 V7097100 P.C.B.ASS'Y MAIN RT
* 5‑1 V7097200 P.C.B.ASS'Y MAIN A
* 5‑1 V7097300 P.C.B.ASS'Y MAIN BG
*s5‑5 XZ833A00 POWERTRANSFORMER UC
*s5‑5 XZ834A00 POWERTRANSFORMER RT
*s5‑5 XZ835A00 POWERTRANSFORMER A
*s5‑5 XZ836A00 POWERTRANSFORMER BG
s5‑6 V2689600 POWERCORD 10ASPT‑22m UC
*s5‑6 V6792800 POWERCORD 7.5A2m A
*s5‑6 V6893100 POWERCORD 2.5A250V2m G
*s5‑6 V6977100 POWERCORD 6.0A2m B
s5‑6 VZ555600 POWERCORD 10A250V2m RT
5‑7 CB072750 CORDSTOPPER SR‑4N‑4
5‑8 CB069250 BINDINGTIE BK‑1
* 5‑11 V7026400 REARPANEL UC
* 5‑11 V7026500 REARPANEL RT
* 5‑11 V7026600 REARPANEL A
* 5‑11 V7026700 REARPANEL BG
* 5‑12 V7026800 RADIATOR
* 5‑13 V7026900 PLATE
* 5‑14 V5986900 PLATEB
s5‑15 V5520700 ROCKERSWITCH JW‑M11RKKUCSTV‑5
* 5‑16 V5987000 COVER
* 5‑17 V5987100 PACKINGA
* 5‑18 V5987200 PACKINGB
* 5‑19 V5987300 PACKINGC
* 5‑20 V7042000 PACKING
* 5‑21 V5987500 GASKET RT
* 5‑22 V5984900 BUSHB
* 5‑23 V7041900 HEATSINK 17BS146‑L118‑K
* 5‑24 V7080100 SUPPORT
* 5‑25 V7275500 RADIATIONSHEET 21x25TBM‑51W
5‑32 EP600140 BINDHEADB‑TITESCREW 3x10MFZN2‑BL
* 5‑33 EG340190 BINDHEADB‑TITESCREW 4x8MFZN2‑BL
* 5‑34 EP630660 BINDHEADP‑TITESCREW 3x10MFZN2‑BL
5‑35 VT669300 PWHEADB‑TITESCREW 3x8‑8MFC2
* 5‑36 VA295800 BINDHEADSCREW 3x8ZMC2‑BL RT
13

YST-SW105
✻New Parts
Ref.
No. PART NO. Description Remarks Markets
* 5‑37 V6655200 BINDHEADS‑TITESCREW 4x8MFZN2BL
* 5‑38 VA847600 BINDHEADP‑TITESCREW 4x12MFZN2‑BL
5‑39 VK173200 SCREW,TRANSISTOR 3x15SPFCM3
* 11 V5984800 PACKING
* 12 V5984900 BUSH,B
* 13 V7636500 REARCOVER
21 EP040070 BINDHEADTAPPINGSCREW 4x20ZMC2‑BL
22 V5537800 HEXAGONSOCKETTAPPINGSCREW 4x20MFZN2BL BL
* 22 V7275700 HEXAGONSOCKETTAPPINGSCREW 4x20MFNI33 CH
ACCESSORIES
203 V5982400 NONSKIDPAD 4pcs/set
14

YST-SW105
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
15

YST-SW105