Yamaha YST-SW320 User manual
YST-SW320
YST-SW320
SERVICE MANUAL
■ CONTENTS
TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . .1
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
REAR PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . .3–4
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . .5–6
PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . . 7–12
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . .13
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . .14
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15–22
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.
IMPORTANT NOTICE
100720
SERVICE MANUAL
YST-SW320
SUBWOOFER SYSTEM
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TEL 13942296513 QQ 376315150 892498299
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YST-SW320
YST-SW320
■TO SERVICE PERSONNEL
1. Critical Components Information
Components having special characteristics are marked Z
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.
AC LEAKAGE
TESTER OR
EQUIVALENT
EQUIPMENT
UNDER TEST
INSULATING
TABLE
WALL
OUTLET
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 REASON 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.
1
●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
Driver . . . . . . . . . . . 25 cm (9-13/16") cone woofer (JA25600)
Magnetically shielded type
Amplifier Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250W/5Ω
Frequency Response . . . . . . . 20 Hz to 160 Hz (-24 dB/oct.)
Power Supply
U, C models . . . . . . . . . . . . . . . . . . . . . . . . .AC120V, 60 Hz
A model . . . . . . . . . . . . . . . . . . . . . . . . . . . .AC240V, 50 Hz
B, G models . . . . . . . . . . . . . . . . . . . . . . . . .AC230V, 50 Hz
R, T models . . . . . . . . . . . .AC110/120/220/240V, 50/60 Hz
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60W
Dimensions (W x H x D) . . . . . . . . . . . . 340 x 432 x 370 mm
(13-3/8" x 17" x 14-9/16")
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 kg (37 lbs. 7 oz)
Finish
All model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Black color
R, T, G models . . . . . . . . . . . . . . . . . . . . . . . . Cherry color
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . Nonskid pad x 4
* Specifications subject to change without notice.
U . . . . . . . . . . USA model
C . . . . . .Canadian model
A . . . . . Australian model
B . . . . . . . . British model
G . . . . . European model
R . . . . . . . General model
T . . . . . . . . . China model
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TEL 13942296513 QQ 376315150 892498299
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YST-SW320
YST-SW320
■DISASSEMBLY PROCEDURES
(Remove parts in the order as numbered.)
1. Removal of Front Panel Ass'y
Remove 4 screws ( q) and then remove the Front
Panel Ass'y in Fig. 1.
* Use an Allen wrench (3mm) to unscrew the Front
Panel Ass'y.
Fig. 2
Fig. 1
* When assembling the Rear Panel, check to ensure that
the gasket is not damaged so as to prevent air leakage
from occurring.
Fig. 3
3
2. Removal of Loud Speaker
a. Remove 8 screws ( w) and then remove the Base
Ass'y in Fig. 2.
b. Remove 4 screws ( e) and then remove the Loud
Speaker in Fig. 2.
3. Removal of Rear Panel Ass'y
Remove 12 screws ( r) in Fig. 3.
* Arrow marks ( ) are printed to identify the screws to be
removed.
●Installation of emblem
1. Put the emblem into the cabinet at the specified posi-
tion.
2. Place a piece of cloth/wood on top of the emblem.
3. Using a mallet, hammer the emblem in place through
the cloth/wood.
* Use special care not to cause damage to the emblem or
cabinet while hammering the emblem.
q
q
Front Panel Ass'y
Main (5) P.C.B.
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Loud Speaker
Base Ass'y
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Rear Panel Ass'y
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TEL 13942296513 QQ 376315150 892498299
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YST-SW320
YST-SW320
Glue List
Place Name
Cord stopper
5 minute epoxy or
2051(Revertex Finewaters SDN.BHD.) or
VYLOK 917DH (National Starch &
Chemical (M) SDM.BHD.)
Power switch 5 minute epoxy or Diabond 1620B
4
370 (14-9/16") 22
8340 (13-3/8")
432 (17")
340 (13-3/8")
340 (13-3/8") (5/16") (7/8")
●Installation of power switch
Rapid cures bond (such as 5 minute epoxy) is required to fix the power switch.
As shown in Fig.A, apply rapid cures bond (such as 5 minute 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 minute epoxy) to the
cord stopper as shown in Fig.A,
Bond application diagram (Fig. A)
●Dimensions
Units : mm (inch)
Apply rapid cures bond
Apply rapid cures bond
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YST-SW320
YST-SW320
5
■ADJUSTMENTS
●Idling Adjustment
To stabilize operation of the amplifier, turn ON the
power with no input signal and wait for 1 or 2 minutes
in non loaded condition before the adjustment.
Adjust VR1 so that the voltage between terminals
TP11 and TP12 is DC 50mV to 250mV.
Point A(Cathode of D29)
V : 20V/div H : 2 msec/div
DC range 1 : 1 probe
0V
Point B(Anode of D30)
V : 20V/div H : 2 msec/div
DC range 1 : 1 probe
0V
●
Confirmation of Power Amp operation
For the power amplifier which has been repaired, it
is absolutely necessary to confirm that a correct
waveform is obtained at points indicated by A and B
in the schematic diagram according to the following
procedure.
Devices required
Signal generator
8Ωor 6Ωload resistor
Oscilloscope (dual trace type)
Connection
1) Connect the output signal from the signal generator
to the input terminal of YST-SW320.
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, 100Hz and
minimum output level settings.
2) Set the volume of YST-SW320 to the minimum
position.
3) Turn on the power to YST-SW320.
4) Adjust the output level of the signal generator and the
volume of YST-SW320 so that the output level
observed at oscilloscope CH2 is 28Vp-p.
Waveform observation
With the settings made as described above, observe
the waveform obtained at CH1 for judgment.
Normal Normal
Abnormal
+B or GND level
Becomes constant Abnormal
-B or GND level
Becomes constant
●Confirmation of AUTO STANDBY
Measuring Condition
R60 = 1MΩ
➔1MΩ//10kΩ
F = 100Hz
Input Level = 4mV
Load = Open
Rating
After 2 to 8 sec.
STANDBY
(LED become red)
Don't STANDBY
Remarks
VOLUME: MAX
HIGH CUT: MAX
AUTO STANDBY: LOW
VOLUME: MAX
HIGH CUT: MAX
AUTO STANDBY: HIGH
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YST-SW320
YST-SW320
6
IDLING CURRENT ADJ.
DC 50mV to 250mV
A
B
RE
WH
Main (1) P.C.B
DC 50mV to 250mV
TP11 (+)
TP12 (-)
VR1
D30
D29
Point A Point B
●Schematic Diagram
●Test Points
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ABCDE
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YST-SW320
■PRINTED CIRCUIT BOARD (Foil side)
7
81
FROM :MAIN (2)
RE
WH
W19
W20
TO : SPEAKER
+V1
AYST
DR–
OUT
DR+
–B1
E
+B1
RE
BL
RE
W7
W6
W5
TO : MAIN (6)
FROM :MAIN (2)
IDLING CURRENT ADJ.
Q16C
Q1CQ9Q1A
Q17CQ17AQ16A
MAIN ( 1 ) P. C.B.
A
B
DC 50mV to 250mV
IDLING TEST POINT
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TEL 13942296513 QQ 376315150 892498299
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ABCDE
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YST-SW320
■PRINTED CIRCUIT BOARD (Foil side)
8
91
91
BE
BL
BE
W16
W15
W14
TO : MAIN (6)
TO : MAIN (1)
DR+
OUT
DR—
AYST
+V1
#17
W17
TO : MAIN (3)
VCC
VCC
E
E
PWS
+V1
#2
W2
FROM : MAIN (4)
MA1
E
TOVL
+12
—12
LIM
MA2
FROM : MAIN (5)
TVOL
E
MAIN
+V2
+12
—12
PWS
VCC
+B1
E
—B1
#18
W18 TO : MAIN (1)
MAIN ( 2 ) P. C. B.
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TEL 13942296513 QQ 376315150 892498299
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ABCDE
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7
YST-SW320
■PRINTED CIRCUIT BOARD (Foil side)
9
8
91
1
MAIN ( 3 ) P. C. B. MAIN ( 7 ) P. C. B.
FROM : MAIN (2)
+V1
PWS
E
E
VCC
VCC
FROM : MAIN (4)
SWL
SWH2
SWH1
SO
● R,T models
W11
GR
W10
BR
TO : VOLTAGE SELECTOR
OR
W12
GY
W13
TO : MAIN (8)
W9
BE
GY
BL
OR
WH
BE
RE
W8
RE
TO : POWER CORD TO : POWER
TRANSFORMER
TO : VOLTAGE
SELECTOR
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TEL 13942296513 QQ 376315150 892498299
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ABCDE
1
2
3
4
5
6
7
YST-SW320
■PRINTED CIRCUIT BOARD (Foil side)
10
81
91
MAIN ( 3 ) P. C. B. MAIN ( 7 ) P. C. B.
OR
W12
BE W9
WH W8
GY
W13
TO : MAIN (8)
FROM : POWER
CORD
TO : POWER
TRANSFORMER
FROM : MAIN (2)
+V1
PWS
E
E
VCC
VCC
FROM : MAIN (4)
SWL
SWH2
SWH1
SO
● U, C, A, B, G models
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ABCDE
1
2
3
4
5
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7
YST-SW320
91
18
BASS PHASE AUTO
STANDBY INPUT
2
RL+––+
OUTPUT
INPUT 1
MA2
LIM
–12
+12
TOVL
E
MA1
TO : MAIN (2)
#1
W1
SWL
SWH2
SWH1
SO
TO : MAIN (3)
#4
W4
MAIN ( 4 ) P. C.B.
R, T, B, G ONLY
91
FROM :MAIN (2)
TOVL
E
MAIN
+V2
+12
–12
PWS
VCC
VOLUME HIGH
CUT SATNDBY/
ON
MAIN ( 5 ) P. C.B.
11
■PRINTED CIRCUIT BOARD (Foil side)
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ABCDE
1
2
3
4
5
6
7
YST-SW320
W7
W6
W5
W14
W15
W16
FROM : POWER
TRANSFORMER
RE
BL
RE
BE
BL
BE
TO : MAIN (2)
TO : MAIN (1)
MAIN ( 6 ) P. C.B.
W12
W13
OR
GY
TO : MAIN (3)
MAIN ( 8 ) P. C.B.
POWER
12
■PRINTED CIRCUIT BOARD (Foil side)
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ABCDE
1
2
3
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5
6
7
YST-SW320
IC11A IC11B IC7A
AUTO STANDBY
SW3 AUTO POWER
ON/OFF CIRCUIT
VR3
VOLUME
L.P.F.
6dB/oct
B.P.F
Q33—36
L.P.F.
12dB/oct
361 576
8IC7B
IC3
Q22, 23
42
D8
D17
D9
D18
Q15
2
HIGH CUT
VR2
PROTECTION
H/L
OFF
PWR
R60
C45
TIMER
IC5
MUSIC
SENSOR
IC4
8
4
6
3
7
Q12
PWR
REGULATOR
IC12
Q11
L
R
+
–
–
+
INPUT 1
L
R
INPUT 2
L
R
+
–
–
+
OUTPUT
IC1A
4
32
SW2
PHASE
SELECT
IC1B
L.P.F.
12dB/oct
68
BASS
SELECT
SW4
+
–
PRE DRIVE
Q2—8, 10 POWER DRIVE
Q9, 16A/C, 26A/C,
Q28, 29
A.N.I.C
LIMITER
RY1
IC8, 9
Q25
D12, 13, 19
Q18—21
D6, 14, 33, 34
0.1
SPEAKER
Q1C, 17C, 24A
Q27, 31
PS AMP
Q1A, 17A, 24C
Q30, 32
PS AMP
–B
+B
H.P.F.
12dB/oct
++
+12
–12
REGULATOR
POWER SUPPLY
D2
IC6
IC10
F1
POWER
SW5
+B
–B
POWER SUPPLY
D1
STANDBY/ON
SW1
R, T ONLY
REGULATOR
Q13, 14
D15
SUB
POWER SUPPLY
D11
RY2
T1
+
■BLOCK DIAGRAM
13
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3
.
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3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
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1
3
9
4
2
2
9
6
5
1
3
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9
2
8
9
4
2
9
8
0
5
1
5
1
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TEL 13942296513 QQ 376315150 892498299
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http://www.xiaoyu163.com
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ABCDEFGH
1
2
3
4
5
6
IJK
7
8
YST-SW320
■SCHEMATIC DIAGRAM
V
O1
2–Vm
1
3+Vm
1
4V
EE
5+Vm
2
6–Vm
2
7V
O2
8V
CC
9
V
CC
1
1
–+
–+
2
IC1, 4, 7—9 : µPC4570HA
Dual OP-Amp
IC5 : M51848L
CR Timer
* All voltage are measured with a 10MΩ/V DC electric volt meter.
* Components having special characteristics are marked Zand
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
2SK304 (E, T) NJM4558L
µPC1237HA
M51848L
µPC4570HA
1
9
1SS133
S2L20U
1SR139-400
MTZJ3.6B
MTZJ12.0C
MTZJ24.0B
Anode
Cathode
B
C
E
2SA970 (GR, BL)
2SA1015 (Y)
2SA1145 (O, Y)
2SC1815 (Y, GR)
2SC2240 (GR, BL)
2SC2705 (O, Y)
2SC2878 (A, B)
RBV-602
D
GS
2SA1492Z (O, P, Y)
2SC3856Z (O, P, Y)
2SC4688 (R, O)
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
14
L.P.F.
L.P.F.
L.P.F.
H.P.F.
B.P.F.
LIMITER
PRE DRIVE POWER DRIVE PS AMP
PROTECTION
POWER SUPPLY
A.N.I.C
POWER SUPPLY
SUB
POWER SUPPLY
AUTO POWER ON/OFF
CIRCUIT
0
00
11.8
3.4
3.4
2.7 5.9
-0.1
0
0
0.6
0
0
-0.1
0
0
0
-11.9
0
0
0
-11.9 0
0
0
11.8
0
01.8 0
0
0.6
7.9
7.3
00
0
-11.9
0
0
0
11.8
AC 97.6V
AC 25.9V
AC 11.2V
011.5
5.6
5.6
11.5
0.9
00.7
11.5
0
7.9
0
3.9
7.9
6.7
0
3.9
6.6
1.3 0
0
7.5
0
1.3
6.6
7.9
5.3
7.5
7.5
7.9
0
0
-16.4 16.4
0
16.4 11.8
0
-16.4 -11.9
6.6
6.0
0
0
0
11.8 0
0
-0.3
-0.3
-11.9
0
0
0
0
-11.9
0
0
0
0
11.8 0
0
-1.5
000
00.1
0.1 0.1
-11.9 11.8
0
0
0
0
00
-62.5 -61.9
-61.8 -61.9
-62.5 -61.4
-61.8
-61.4 -1.6
-61.4
-61.8 -61.8
00.2
0.7
0.7
61.6
62.1
62.9
62.4
61.6 61.6
62.1
1.7
-1.0
-1.6
1.7
1.7
1.1
4.2
63.1 63.1
3.6
1.1
3.6
0.6
0.6
2.6
3.2
62.6
0
63.1 63.0 62.6
62.7 62.7
63.1
62.4 63.1
2.6
2.6
63.1
0
0
63.1
62.4
62.4
0
0
0
-2.7
-62.3
-3.2
-0.5
-0.5
-1.0
-62.8
-3.6
-3.6
-1.0
-4.2
-62.8
-1.6
-62.8
-62.3
-62.9
-63.4
-62.8 62.8
-63.1 -63.4 -62.8
-2.6
-2.6
-2.7 0
-62.8
3.3
0
0.7
0
2.0
0
0
0
6.6
6.0
0.7
24.3
63.1
0
0
-62.8
4.2
IDLING CURRENT ADJ.
DC 50mV to 250mV
A
B
+
–
BCE
2SA1837
2SC4793
1
8
IC11 : NJM4558L
Dual OP-Amp
–IN
1
2
+IN
1
3
–V
CC
4
+IN
2
5
–IN
2
6
OUT
2
7
+V
CC
8
OUT
1
1
–
+
–
+
IC3 : µPC1237HA
Protector IC for Power Amplifier
1
2
534
78
6
Overload
detect
Mid-point
potential
detect
Flip flop
circuit
Vcc on
mute
AC OFF
detect
Latch / automatic
return select
Relay
drive
circuit
GND
Vcc
GND
6
4
12 3
TRIGGER
OUT
RESET
REFERENCE
VOLTAGE
THRESHOLD
DISCHARGE
VCC
78
+
–
FLIP-
FLOP
+
–
5
RR R
S1NB20
+–
2SC1846S
ECB
123
1:OUTPUT
2:COMMON
3:INPUT
NJM78L08A
BCE
NJM78M12FA NJM79M12FA
1: OUTPUT
2: COMMON
3: INPUT 321
1:COMMON
2:INPUT
3:OUTPUT
321
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1
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1
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0
9
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2
8
9
4
2
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1
3
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4
2
2
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6
5
1
3
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2
8
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2
9
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TEL 13942296513 QQ 376315150 892498299
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YST-SW320
YST-SW320
15
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
Note) Those parts marked with “#” are not included in the P.C.B. ass'y.
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.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-END TUNER PACK
VR : ROTARY POTENTIOMETER
VR.MTR : POTENTIOMETER WITH MOTOR
VR.SW : POTENTIOMETER WITH ROTARY SW
VR.SLIDE : SLIDE POTENTIOMETER
VR.TRIM : TRIMMER POTENTIOMETER
■ELECTRICAL PARTS
PARTS LIST ■ WARNING
Components having special characteristics are marked Zand must be
replaced with parts having specifications equal to those originally installed.
●Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS
List. For the part Nos. of the carbon resistors refer to the last page.
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1
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0
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2
8
9
4
2
9
8
T
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3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
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6
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3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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YST-SW320
YST-SW320
Schm
Ref. PART NO. Description
New Parts
*
Schm
Ref. PART NO. Description
New Parts
*
16
P.C.B. MAIN
* V5057600 P.C.B. MAIN(UC)
* V5057700 P.C.B. MAIN(RT)
* V5057800 P.C.B. MAIN(A)
* V5057900 P.C.B. MAIN(BG)
CB1 VB858600 CN.BS.PIN 7P
CB2 VD004900 CN.BS.PIN 6P
CB3 VB858700 CN.BS.PIN 8P
CB4 VD004700 CN.BS.PIN 4P
CB5 VT658200 HOLDER.FUS PC-FH1(RT)
CB6 VT658200 HOLDER.FUS PC-FH1(RT)
CB7 VT658200 HOLDER.FUS PC-FH1
CB8 VT658200 HOLDER.FUS PC-FH1
CB9 VB858700 CN.BS.PIN 8P
CB17 VD004800 CN.BS.PIN 5P
CB18 VL844700 CN.BS.PIN 3P
C1 VT857900 C.POL 0.1uF 250V
C2 VJ837200 C.EL 47uF 16V
C3 VJ837200 C.EL 47uF 16V
* C4 VT727600 C.EL 10uF 100V
C5 VK534000 C.PP 220pF 200V
C6 VE117600 C.EL 220uF 10V
C7 UA655100 C.MYLAR 0.1uF 50V
C8 UA655470 C.MYLAR 0.47uF 50V
C9 UA655820 C.MYLAR 0.82uF 50V
C10 UA655470 C.MYLAR 0.47uF 50V
C11 UA655220 C.MYLAR 0.22uF 50V
C12 Ui377470 C.EL 47uF 63V
C13 Ui377470 C.EL 47uF 63V
C14 VJ836900 C.EL 10uF 16V
C15 VK534000 C.PP 220pF 200V
C16 VT857900 C.POL 0.1uF 250V
C17 UA655820 C.MYLAR 0.82uF 50V
* C18 V6092500 C.EL 8200uF 80V
* C19 V6092500 C.EL 8200uF 80V
C20 UJ648470 C.EL 470uF 25V
C21 UJ648470 C.EL 470uF 25V
C22 VF964800 C.EL 100uF 16V
C23 VF964800 C.EL 100uF 16V
C24 VF760000 C.EL 100uF 10V
C25 VF964800 C.EL 100uF 16V
C26 UA653100 C.MYLAR 1000pF 50V
C27 VT727600 C.EL 10uF 100V
C28 UA655220 C.MYLAR 0.22uF 50V
C29 UA655100 C.MYLAR 0.1uF 50V
C30 UA655100 C.MYLAR 0.1uF 50V
C31 UA654100 C.MYLAR 0.01uF 50V
C32 UA654100 C.MYLAR 0.01uF 50V
C33 UA654270 C.MYLAR 0.027uF 50V
C34 VJ836900 C.EL 10uF 16V
C35 V5058000 C.MYLAR 4.7uF 250V
C36 V5058000 C.MYLAR 4.7uF 250V
C37 UA654470 C.MYLAR 0.047uF 50V
C38 FG251220 C.CE 22pF 50V
C39 FG212120 C.CE 120pF 50V
C40 VF606700 C.EL 1000uF 25V(BG)
C40 VF606700 C.EL 1000uF 25V(UCABG)
C40 VH620500 C.EL 10uF 25V(RT)
C41 UA654470 C.MYLAR 0.047uF 50V
C42 FG214100 C.CE 0.01uF 50V
C43 FG213100 C.CE 1000pF 50V
C44 VJ839100 C.EL 1uF 50V
C45 UA654680 C.MYLAR 0.068uF 50V
C46 UJ638330 C.EL 330uF 16V
C47 UJ648220 C.EL 220uF 25V
* C48 VT726600 C.EL 470uF 63V(RT)
C49 VS741700 C.CE.SAFTY 0.01uF 275V
C50 FG214100 C.CE 0.01uF 50V
C51 UA654470 C.MYLAR 0.047uF 50V
C52 VJ836900 C.EL 10uF 16V
C53 VJ836900 C.EL 10uF 16V
C54 FG212120 C.CE 120pF 50V
C55 FG251220 C.CE 22pF 50V
C56 VT728200 C.EL 330uF 100V
C57 UA655100 C.MYLAR 0.1uF 50V
C58 UA654220 C.MYLAR 0.022uF 50V
C59 UA654220 C.MYLAR 0.022uF 50V
* C60 VT728200 C.EL 330uF 100V
C61 UA655820 C.MYLAR 0.82uF 50V
C62 UA655220 C.MYLAR 0.22uF 50V
C63 UA655220 C.MYLAR 0.22uF 50V
C64 UA655220 C.MYLAR 0.22uF 50V
C65 UM417100 C.EL 10uF 50V
C66 UM417100 C.EL 10uF 50V
C67 FG212220 C.CE 220pF 50V
C68 VJ836900 C.EL 10uF 16V
C69 UA654390 C.MYLAR 0.039uF 50V
C70 VJ836900 C.EL 10uF 16V
C71 FG212220 C.CE 220pF 50V
C72 VF964800 C.EL 100uF 16V
C73 VF964800 C.EL 100uF 16V
C74 VJ836900 C.EL 10uF 16V
C75 VJ836900 C.EL 10uF 16V
C76 UA654820 C.MYLAR 0.082uF 50V
C77 UA654390 C.MYLAR 0.039uF 50V
C78 Vi531900 C.EL 47uF 10V
C79 VA777700 C.CE 220pF 50V
C79 VA777700 C.CE 220pF 50V(RTBG)
C80 VA761000 C.CE 22pF 50V
C80 VA761000 C.CE 22pF 50V(RTBG)
C81 UA655390 C.MYLAR 0.39uF 50V
C82 UA655220 C.MYLAR 0.22uF 50V
C83 FG214100 C.CE 0.01uF 50V
ZD1 Vi234100 DIODE.BRG RBV-602
ZD2 VR253700 DIODE.BRG S1NB20 1.0A 200V
D3 iF004600 DIODE 1SS133
D4 iF004600 DIODE 1SS133
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3
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4
2
2
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9
2
8
9
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2
9
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5
1
5
1
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6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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http://www.xiaoyu163.com
YST-SW320
YST-SW320
Schm
Ref. PART NO. Description
New Parts
*
Schm
Ref. PART NO. Description
New Parts
*17
P.C.B. MAIN
D5 iF004600 DIODE 1SS133
D6 iF004600 DIODE 1SS133
D7 VG442500 DIODE.ZENR MTZJ24B 24V
D8 iF004600 DIODE 1SS133
D9 iF004600 DIODE 1SS133
D10 iF004600 DIODE 1SS133
ZD11 VR253700 DIODE.BRG S1NB20 1.0A 200V
D12 iF004600 DIODE 1SS133
D13 iF004600 DIODE 1SS133
D14 iF004600 DIODE 1SS133
D15 VU264100 DIODE 1SR139-400
D16 VG440300 DIODE.ZENR MTZJ12C 12V(RT)
D17 iF004600 DIODE 1SS133
D18 VS079300 LED SPR-39MVW
D19 iF004600 DIODE 1SS133
D20 VG436400 DIODE.ZENR MTZJ3.6B 3.6V
D21 VU264100 DIODE 1SR139-400
D22 VG436400 DIODE.ZENR MTZJ3.6B 3.6V
D23 VU264100 DIODE 1SR139-400
D24 VU264100 DIODE 1SR139-400
D25 VU264100 DIODE 1SR139-400
D26 VU264100 DIODE 1SR139-400
D27 iF004600 DIODE 1SS133
D28 VP779200 DIODE S2L20U
D29 VP779200 DIODE S2L20U
D30 VP779200 DIODE S2L20U
D31 VP779200 DIODE S2L20U
D32 iF004600 DIODE 1SS133
D33 iF004600 DIODE 1SS133
D34 iF004600 DIODE 1SS133
ZF1 KB001660 FUSE T1.6A 250V(ABG)
ZF1 KB001660 FUSE T1.6A 250V(BG)
ZF1 V5279400 FUSE 6A 250V(RT)
ZF1 V5279400 FUSE 6A 250V(UCRT)
ZF2 KB001660 FUSE T1.6A 250V(RT)
IC1 XB247301 IC uPC4570HA
IC3 XF663A00 IC uPC1237HA
IC4 XB247301 IC uPC4570HA
IC5 XP741A00 IC M51848L
IC6 XJ602A00 IC NJM78M12FA
IC7 XB247301 IC uPC4570HA
IC8 XB247301 IC uPC4570HA
IC9 XB247301 IC uPC4570HA
IC10 XD343A00 IC NJM79M12FA
IC11 XM922A00 IC NJM4558L
IC12 iG160100 IC NJM78L08A 8V
L1 V5058100 COIL 120uH
L2 V5058100 COIL 120uH
L3 VR906600 COIL 0.95uH
* PJ1 V6415800 JACK,PIN 2P RJ-1060-01-0500
# Q1 iX632610 TR A1837/C4793 O,Y
Q2 iC1815M0 TR 2SC1815 Y,GR
Q3 iA097000 TR 2SA970 GR,BL
Q4 iA097000 TR 2SA970 GR,BL
Q5 iC1815M0 TR 2SC1815 Y,GR
Q6 iA101590 TR 2SA1015 O,Y
Q7 iA097000 TR 2SA970 GR,BL
Q8 VE198700 TR 2SA1145 O,Y
# Q9 VC398100 TR 2SC1846 S
Q10 VE198800 TR 2SC2705 O,Y
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 iX606460 TR A1492Z/C3856Z O,P,Y
Q18 iC1815M0 TR 2SC1815 Y,GR
Q19 iA101590 TR 2SA1015 O,Y
Q20 iC224030 TR 2SC2240 GR,BL
Q21 iA097000 TR 2SA970 GR,BL
Q22 iA097000 TR 2SA970 GR,BL
Q23 iC224030 TR 2SC2240 GR,BL
Q24 iX632610 TR A1837/C4793 O,Y
Q25 V3028000 FET 2SK304 E
Q26 iX632610 TR A1837/C4793 O,Y
Q27 VE198800 TR 2SC2705 O,Y
Q28 VE198800 TR 2SC2705 O,Y
Q29 VE198700 TR 2SA1145 O,Y
Q30 VE198700 TR 2SA1145 O,Y
Q31 iA097000 TR 2SA970 GR,BL
Q32 iC224030 TR 2SC2240 GR,BL
Q33 iA097000 TR 2SA970 GR,BL
Q34 iA097000 TR 2SA970 GR,BL
Q35 iC287820 TR 2SC2878 A,B
Q36 iC287820 TR 2SC2878 A,B
R2 HV455470 R.CAR.FP 470Ω1/4W
R3 HV455470 R.CAR.FP 470Ω1/4W
R4 HL236180 R.MTL.OXD 1.8KΩ3W
R10 HU597100 R.MTL.FLM 10KΩ1/4W
R11 HU597100 R.MTL.FLM 10KΩ1/4W
R12 HU597100 R.MTL.FLM 10KΩ1/4W
R16 HV453470 R.CAR.FP 4.7Ω1/4W
R17 VG730500 R.MTL.OXD 0.15Ω3W
R18 VG730500 R.MTL.OXD 0.15Ω3W
R19 HV455470 R.CAR.FP 470Ω1/4W
R20 HV453470 R.CAR.FP 4.7Ω1/4W
R23 HV455330 R.CAR.FP 330Ω1/4W
R27 HV453100 R.CAR.FP 1Ω1/4W
R28 HV453100 R.CAR.FP 1Ω1/4W
R31 HU576390 R.MTL.FLM 3.9KΩ1/4W
R32 HV454220 R.CAR.FP 22Ω1/4W
R33 HV455220 R.CAR.FP 220Ω1/4W
R39 HU578100 R.MTL.FLM 100KΩ1/4W
R40 HV455220 R.CAR.FP 220Ω1/4W
R41 HV454330 R.CAR.FP 33Ω1/4W
R44 HV756390 R.CAR.FP 3.9KΩ1/4W
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
YST-SW320
YST-SW320
Schm
Ref. PART NO. Description
New Parts
*
Schm
Ref. PART NO. Description
New Parts
*
18
P.C.B. MAIN
R45 HV456120 R.CAR.FP 1.2KΩ1/4W
* R46 V6022600 R.WW 0.1Ω3W
R47 HV453100 R.CAR.FP 1Ω1/4W
R48 HV453100 R.CAR.FP 1Ω1/4W
R62 HV453220 R.CAR.FP 2.2Ω1/4W(BG)
R62 HV453220 R.CAR.FP 2.2Ω1/4W(UCABG)
R66 HL213100 R.MTL.OXD 1Ω1W
R67 HL213100 R.MTL.OXD 1Ω1W
R68 HV455120 R.CAR.FP 120Ω1/4W
R69 HV456330 R.CAR.FP 3.3KΩ1/4W
R79 HV455680 R.CAR.FP 680Ω1/4W
R80 HV455150 R.CAR.FP 150Ω1/4W
R81 HV456220 R.CAR.FP 2.2KΩ1/4W
R82 HV456220 R.CAR.FP 2.2KΩ1/4W
R86 HV456470 R.CAR.FP 4.7KΩ1/4W
R87 HV456470 R.CAR.FP 4.7KΩ1/4W
R105 HV454100 R.CAR.FP 10Ω1/4W
R113 VH007900 R.MTL.FLM 20KΩ1/4W
R115 HV454220 R.CAR.FP 22Ω1/4W
R117 HV454220 R.CAR.FP 22Ω1/4W
R121 HV454220 R.CAR.FP 22Ω1/4W
R122 HV454220 R.CAR.FP 22Ω1/4W
R125 HV453220 R.CAR.FP 2.2Ω1/4W
R128 HV453470 R.CAR.FP 4.7Ω1/4W
R129 HV453470 R.CAR.FP 4.7Ω1/4W
R130 HV453470 R.CAR.FP 4.7Ω1/4W
R132 HV453220 R.CAR.FP 2.2Ω1/4W
R135 HV455560 R.CAR.FP 560Ω1/4W
R152 HV455470 R.CAR.FP 470Ω1/4W
ZRY1 VU161600 RELAY DC OSA-SS-224DM3
ZRY2 VU349800 RELAY DC SDT-SS-112DM
ST1 BB071360 SCR.TERM 8.3x13
SW1 VS066500 SW.PUSH SPPH13-W
SW2 V5178000 SW.SLIDE SSSF12-P06NO
SW3 V5178100 SW.SLIDE SSSU123-S09NO
SW4 V5178000 SW.SLIDE SSSF12-P06NO
ZT1 XV443A00 TRANS.PWR (UC)
ZT1 XV444A00 TRANS.PWR (RT)
ZT1 XV445A00 TRANS.PWR (ABG)
ZT1 XV445A00 TRANS.PWR (BG)
TE1 VT658100 TERM.WRAP 352-TX119
TE2 VT658100 TERM.WRAP 352-TX119
TE3 V4811400 TERM.SP 8P(BG)
TE3 VV003100 TERM.SP 8P(RT)
TE3 VV003100 TERM.SP 8P(UCRTA)
TP11 VT969000 PIN.TEST IRS-2049
TP12 VT969000 PIN.TEST IRS-2049
VR1 VJ692800 VR.TRIM B470Ω
VR2 VV954800 VR 10KΩ
VR3 VV954700 VR A5KΩ
BB070700 GND.MTL
VN774800 GND.WSHR MEP1866 #11102
* V6383100 ASSY,CABLE 2P 420MM RE/WH
* V6406300 HOLDER.LED LE56217-0A
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
ABCDE
1
2
3
4
5
6
7
YST-SW320
■EXPLODED VIEW
19
34
34
34
1
34
21
32
32 32
26
33
33
5-1-1
5-1-11
5-1-1
5-1-1
5-1-1
5-1-1
5-1-1
5-1-4
5-1-8
5-1-12
5-1-6
5-1-12
5-1-13
5-1-5 5-1-7
5-9 4-1
4-6
4-15
5-24
5-34
5-34
5-12 1-8
5-17
5-18
5-18
5-11
5-37
5-37 5-33 5-19
1-7
5-14
5-8 5-6
5-15 5-16
5-20
5-36
5-5
5-21
5-22
5-31
5-32
5-31
5-17
5-31
5-35
5-34
5-34
35
32
32
27
2
35
27
27
35
35
12-1
12-10
12-1
12-10
12-10
12-1
12-10
4-15
5-23 5-11
5-38
1-12
1-12 1-12
1-12 1-12
1-12
4-12
11-1
4-11
1-11
5-31
11-2
11-10
11-10
11-10 11-10
R, T models
(3)
(8)
(5)
(1)
(4)
(2)
5-1-1
(6)
5-1-1
(1)
Accessories
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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