100828
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.
P.O.Box 1, Hamamatsu, Japan
■ CONTENTS
TO SERVICE PERSONNEL .......................................... 2
FRONT PANEL .............................................................. 2
REAR PANELS .......................................................... 3~4
SPECIFICATIONS.......................................................... 5
DISASSEMBLY PROCEDURES ............. 6~7
SERVICE POSITION 7
REPAIR PROCEDURES 8~11
ADJUSTMENT 12~14
IC DATA ....................................................................... 15
BLOCK DIAGRAM ....................................................... 16
PRINTED CIRCUIT BOARD .................................. 17~21
IC BLOCK..................................................................... 22
PIN CONNECTION DIAGRAM ................................... 22
SCHEMATIC DIAGRAM .............................................. 23
PARTS LIST ........................................................... 25~37
REMOTE CONTROL.................................................... 38
Parts List for Carbon Resistors ................................ 39
SERVICE MANUAL
SUBWOOFER SYSTEM
YST-SW1500
YST-SW1500
V983440
2
YST-SW1500
YST-SW1500
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 ohm shunted
by 0.15µF.
“CAUTION”
“F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 12A,
250V FUSE.”
CAUTION
F1: REPLACE WITH SAME TYPE 12A, 250V FUSE.
ATTENTION
F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 12A, 250V.
● Leakage current must not exceed 0.5mA.
● Be sure to test for leakage with the AC plug in both polarities.
■ FRONT PANEL
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.
3
YST-SW1500
YST-SW1500
■ REAR PANELS
A model
U, C models
B model
4
YST-SW1500
YST-SW1500
G model
J model
K model
5
YST-SW1500
YST-SW1500
420 (16-9/16") 448 (17-5/8")
Unit : mm (inch)
511 (20-1/8")
420 (16-9/16")
• DIMENSIONS
■ SPECIFICATIONS /
Type / Advanced Yamaha Active Servo Technology
Output Power / 1kW (100 Hz, 5 ohms 10% T.H.D.)
Input Sensitivity /
INPUT1 (SP) ........................ 1.0 V (50 Hz, 1 kW / 5 ohms, L + R)
INPUT2 (PJ) ....................... 50 mV (50 Hz, 1 kW / 5 ohms, L + R)
INPUT3 (PJ) ....................... 50 mV (50 Hz, 1 kW / 5 ohms, L + R)
Input Impedance /
INPUT1 (SP) ................................................................ 2.2 k-ohms
INPUT2 (PJ) .................................................................. 12 k-ohms
INPUT3 (PJ) .................................................................. 12 k-ohms
Frequency Response / 16 Hz to 160 Hz
Driver / 12" Cone, Magnetic Shielding Type
Input Section /
INPUT1 .............................................................. Speaker Terminal
INPUT2 ............................................................................. Pin Jack
INPUT3 ............................................................................. Pin Jack
I/O PORT .......................................................... 3.5 mm Mini Jack
Output Section /
H.P.F. OUT ...................................................................... Pin Jack
I/O PORT .......................................................... 3.5 mm Mini Jack
Operation Section /
Front Panel ....... STANDBY/ON Switch, B.A.S.S. Switch,
VOLUME Control, HIGH CUT Control
Rear Panel ....... Power Switch, Auto Standby Switch (HIGH /
LOW / OFF), H.P.F. Switch (80 Hz / 100 Hz)
Power Supply /
U, C models ........................................................ AC 120 V, 60 Hz
A model ............................................................... AC 240 V, 50 Hz
B, G models ........................................................AC 230 V, 50 Hz
K model ............................................................... AC 220 V, 50 Hz
J model .......................................................... AC 100 V, 50/60 Hz
Power Consumption /
U, C, A, B, G, K models ...................................................... 250 W
J model ................................................................................ 185 W
Standby Power Consumption / 1.0 W
Dimension / (W x H x D) ................... 420 x 511 x 448 mm
(16-9/16" x 20-1/8" x 17-6/8")
Weight / 29.0 kg (63 lbs. 15 oz.)
Finish /
Cherry color ......................................... U, C, A, B, G, K, J models
Black color ................................................ U, C, A, B, G, J models
Included Accessories /
Power Cable x 1 pc (U, C, G, K, J models), Speaker Cable (4 m) x
2 pcs (J model), Pin Cable for Subwoofer (3 m) x 1 pc (J model),
Non-skid Pad x 4 pcs, Remote Control x 1 pc, Battery (AA, R6,
UM-3) x 2 pcs, Grounding Cable
* Specifications are subject to change without notice due to product
improvements.
U .......... U.S.A. model C ...... Canadian model
A .......... Australian model B ...... British model
G .......... European model K ...... Korean model
J ........... Japanese model
6
YST-SW1500
YST-SW1500
1
1
CB8
CB7
Front Panel Ass'y
■ DISASSEMBLY PROCEDURE
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet.
1. Removal of Front Panel Ass'y
a. Remove 4 screws (1) and then remove the Front Panel
Ass'y. (Fig. 1)
* Use an Allen wrench (3mm) to unscrew the Front
Panel Ass'y.
b. Remove CB7 and CB8. (Fig. 1)
Fig. 2
2. Removal of Rear Panel Ass'y
a. Remove 12 screws (2) and then remove the Rear
Panel Ass'y. (Fig. 2)
* Arrow marks (
) are printed to identify the screws to
be removed.
* When assembling the Rear Panel Ass'y, check to
ensure that the gasket is not damaged so as to
prevent air leakage from occurring.
b. Remove CB1, CB3 and CB6. (Fig. 2)
Fig. 1
2
2
Rear Panel Ass'y
7
YST-SW1500
YST-SW1500
3
3
3
4
4
3
Fig. 3
• Installation of emblem
a. Put the emblem into the cabinet at the specified
position.
b. Place a piece of cloth/wood on top of the emblem.
c. 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.
3. Removal of Driver
a. Remove 8 screws (3) and then remove the Base
Ass'y. (Fig. 3)
b. Remove 8 screws (4) and then remove the Driver.
(Fig. 3)
■ SERVICE POSITION
MAIN (2) P.C.B. CB1 – POWER (2) P.C.B. CB8:
V9956600 (6P 700mm)
MAIN (1) P.C.B. CB3 – POWER (2) P.C.B. CB7:
V9956700 (11P 750mm)
When checking the P.C.B.:
• To help lift the power cable connecting section of the
rear panel, put the supporting wood under the rear
panel assembly.
• Use the extension cable for servicing for the following 2
sections.
MAIN (2) P.C.B. CB1 – POWER (2) P.C.B. CB8:
V9956600 (6P 700mm)
MAIN (1) P.C.B. CB3 – POWER (2) P.C.B. CB7:
V9956700 (11P 750mm)
Fig. 4
Extension Cable
Supporting Wood
CB3
CB7
CB1
CB8
MAIN (2) P.C.B.MAIN (1) P.C.B.
POWER (2) P.C.B.
8
YST-SW1500
YST-SW1500
■ REPAIR PROCEDURES
When the power amplifier has failed, it is possible that the
switching power supply section has also failed. Therefore,
it is recommended to separate the power amplifier section
and the switching power supply section for the repair work.
1. Separating power amplifier section
and switching power supply section
Disconnect CB4 and CB5 of the MAIN (1) P.C.B.,
thereby the power amplifier section and the switching
power supply section will be separated.
2. Repairing power amplifier (MAIN (1)
P.C.B.)
Described below is the method to diagnose trouble of
the major parts.
FET (Q29, Q30, Q34, Q35, Q41~44)
Check the resistance between G and S to determine if
any trouble exists.
If a trouble has occurred, the G-S resistance should
indicate a value close to 0Ω.
If no trouble exists, the G-S resistance value should be
as follows.
Q29, Q30, Q34, Q35: about 820Ω
Q41~44: about 115Ω
Transistors (Q22A, Q22C, Q28A, Q28C, Q33A, Q33C,
Q39A, Q39C)
Use the diode characteristics between B and E, B and
C to determine if any trouble exists.
Operation check
1) Prepare a stabilized DC power source. No load
resistance is needed.
2) Set the output voltage of the stabilized DC power
source to +30V and -30V.
3) Connect the +B terminal of the stabilized DC power
source to JY201, -B terminal to JY202 and GND
terminal to GND. (Fig. A)
4) Connect the probe of the oscilloscope to R170 and
GND. (Fig. A)
5) Connect the output terminal of the signal generator
to J57 (=base of Q16) via 100µF 16V +5.6kΩ and the
GND terminal to GND.
6) Set the output signal of the signal generator to sine
wave, 100Hz.
7) Turn on the stabilized DC power source.
8) Raise the output level of the signal generator
gradually and check the output waveform on the
oscilloscope.
9) If the output waveform is not distorted up to 40Vp-p
output level, the operation is OK.
After confirming operation, disconnect the stabilized
DC power source, signal generator and 100µF 16V.
G
D
FET
S
B
C
E
TR
9
YST-SW1500
YST-SW1500
Fig. A
Q42
Q44
Q35
Q30
Q29
Q34
Q43
Q41
Q20
Q28A
R170
Q39CQ22A
Q33A
Q28C
GND
JY201
JY202
Oscilloscope
MAIN (1) P.C.B.
J57
Q16
Q22C Q39A
Q33C
CB4
CB5
Stabilized DC Power Source
Signal Generator
Set to -30. Set to +30.
GND
GND OUT
Ground side of probe
10
YST-SW1500
YST-SW1500
3. Repairing switching power supply
section (POWER (1) P.C.B.)
To avoid possible danger:
C102 and C103 are dangerous, for a high voltage is
retained there even after the power is turned off.
Before the repair work, connect about 100Ω 5W
resistance between terminals of the capacitor to forced
discharging.
After the repair work, also perform forced discharging
by connecting about 100Ω 5W resistance between
terminals of the capacitor.
Replacing faulty parts
Described below is the method to diagnose trouble of
the major parts.
Transistors (Q51, 52)
If a trouble exists, the C-E resistance value should be
close to 0Ω.
Operation check
1) Connect the probe of the oscilloscope between TP3
and TP4.
2) Turn on the POWER switch.
3) Turn on the STAND/BY switch. RY2 turns on and the
SW power source is activated.
4) Check the waveform on the oscilloscope.
5) About 12 seconds later, RY2 turns off and the
waveform on the oscilloscope disappears at the
same time.
This does not mean any abnormality but indicates
that the protection circuit is at work because CB5 is
disconnected.
In order to check this, connect CB5 and turn on the
STANDBY/ON switch. Then RY2 turns on and the
SW power source is activated. Watch the waveform
on the oscilloscope to check that RY2 does not turn
off.
After operation check
Be sure to turn off the POWER switch.
Caution
Never connect the oscilloscope to any other part after
the operation check because it is dangerous with a high
potential applied to its ground side.
Also, use care not to touch the frame of the
oscilloscope due to the same reason.
11
YST-SW1500
YST-SW1500
Fig. B
TP3
C103
C102
Q51
Q52
TP4
RY2
Oscilloscope
POWER (1) P.C.B.
Ground side of probe
Caution: Use the AC range.
12
YST-SW1500
YST-SW1500
■ ADJUSTMENT
• Confirmation of Power Amp section
operation
For the power amplifier section 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 (100Hz sine wave)
8 Ω or 6 Ω load resistor
Oscilloscope (dual trace type)
Connection
1) Connect the output signal from the signal generator to
the L/MONO terminal.
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) Turn on the power to YST-SW1500.
3) Adjust the output level of the signal generator and the
volume of YST-SW1500 so that the output level
observed at oscilloscope CH2 is 70Vp-p.
Waveform observation
With the settings made as described above, observe the
waveform obtained at CH1 for judgment.
Normal
Abnormal
+B or GND level
becomes
constant
Abnormal
-B or GND level
becomes
constant
13
YST-SW1500
YST-SW1500
•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 TP1 and
TP2 is DC 30mV to 150mV.
Q42
Q44
Q35
Q30
Q29
Q34
Q43
Q41
Q20
D38
D35
TP2
TP1
MAIN (1) P.C.B.
Point B
Point A
DC 30mV
to 150mV
Point B
DC 30 mV
to 150 mV
Point A
14
YST-SW1500
YST-SW1500
• AUTO STANDBY operation check
Setting
1) Turn off the POWER switch.
2) Set the AUTO STANDBY/sensing switch to OFF.
3) Connect the output of the signal generator to the L/
MONO terminal.
4) Set the signal generator for the sine wave, 100Hz,
10mV.
Starting test mode
Turn on the POWER switch while pressing the STANDBY/
ON key and B.A.S.S. key simultaneously. Keep pressing
these keys for 5 seconds or more, and the test mode will
be activated.
Display in test mode
The STANDBY/ON LED lights up in green.
At this time, MUSIC/MOVIE and PHASE LED’s light up as
well.
Confirmation
1) Change the AUTO STANDBY/sensing switch setting
from OFF to LOW.
5 seconds later, the STANDBY/ON LED changes from
green to red.
At the same time, MUSIC/MOVIE and PHASE LED’s go
off.
2) Change the AUTO STANDBY/sensing switch setting
from LOW to OFF.
The STANDBY/ON LED changes from red to green.
At this time, MUSIC/MOVIE and PHASE LED’s light up
as well.
3) Change the STANDBY/sensing switch setting from
LOW to HIGH.
The STANDBY/ON LED remains unchanged in green.
Canceling test mode
Turn off the POWER switch.
15
YST-SW1500
YST-SW1500
No. Port No. I/O Function name Detail of function
Standby LED driving output, GREEN
Standby LED driving output, RED
Predicted danger detection
STANDBY /ON SW detection
Reference voltage for AD conversion
Connection for grounding
Connection for grounding
Clock
Clock
Power supply +5V
System reset input
Connection for grounding
Preset 1 LED driving output
Preset 2 LED driving output
Preset 3 LED driving output
Standby terminal
Power supply relay driving output
B.A.S.S. switch detection
MUSIC LED driving output
MOVIE LED driving output
Motor 1 clockwise revolution
Motor 1 counterclockwise revolution
Motor 2 clockwise revolution
Motor 2 counterclockwise revolution
Phase LED driving output
Error detect terminal
Motor 1 angle detection
Motor 2 angle detection
Auto Standby detection
Remote control signal detection
Standby terminal
■ IC DATA
IC12 : LC651152N (POWER P.C.B.)
µ-COM
PF3/INTPF2/SCK
RES
1
PA0/AD0
27
PA3/AD3
30
Por t A
I. DEC
PC
STACK 1
STACK 8
ROM
1
PG0/AD4
1
PG3/AD7
4
Por t G
1
PC0
17
PC3
20
Por t C
1
PD0
21
PD3
24
Por t D
I/O Bus
I/O Buffer
E
Por t E
1
PF1/SO
14
Serial
Shift
Register
Serial
Mode
Register
AC
ALU
DP
Serial
Mode
Register
RAM
1
PF0/SI
13
1
PF2/SCK
15
1
PF3/INT
16
Serial
Shift
Register
Lower Digit
Higher Digit
4 bit
4/8 bit
4/8 bit
1
AV+
5
AV-
6
8 bit
ADC
OSC1
8
RES
11
TEST
12
VDD
10
VSS
7
OSC2
9
8 2325
PE0
26
PE1
Por t F
8 2313
PF0
16
PF3
2326
WDR
System Bus
IR
STS
ZF
ZSF
CF TMF
EXTF
CSF
WRF
CTLTM
INT
OSC
PG0/AD4
PG1/AD5
PG2/AD6
PG3/AD7
AV+
AV-
VSS
OSC1
OSC2
VDD
TEST
PF0/SI
PF1/SO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
PA3/AD3
PA2/AD2
PA1/AD1
PA0/AD0
PE1/WDR
PE0
PD3
PD2
PD1
PD0
PC3
PC2
PC1
PC0
16
YST-SW1500
YST-SW1500
IC11 IC11 IC22
VR1
VOLUME
L.P.F.
6dB/oct.
B.P.F.
Q3, 4, 5, 7
–
+
1
IC22 IC6A
IC15
IC12
µ-COM
Q26, 27, 32,
D24, 29, 30
23, 24 M2R, M2F
29 TMR
PROTECTION
REGULATOR
IC5
Q50
L
R
+
–
–
+
INPUT 1
L
R
INPUT 2
L
R
+
–
–
+
OUTPUT
IC23
L.P.F.
12dB/oct.
HIGH
CUT
VR2
IC23
L.P.F.
12dB/oct.
HIGH
CUT
VR2
IC6B
PRE DRIVE
Q12 ~ 19
POWER DRIVE
Q29, 30, 34, 35
A.N.I.C
A-YST
IC1, 2, Q21,
D8, 9, 12
R234
0.22 x 2
SPEAKER
Q24, 28C, 33C,
39A, 41, 43
Q25, 28A, 33A,
39C, 42, 44
Q37, 38
Q47
Q6
IC16
–B
+B
H.P.F.
12dB/oct.
IC10, 14
IC17,
Q53~56,
TH1
POWER SUPPLY
POWER
SW5
IC7
+5V
+8V
+B
–B
D59
RY2
T2
+
–
F1
FI1 L7
SWITCHING POWER SUPPLY
Q51, 52,
D60, 61,
D64, 65
T3
16
15
14
13
12
11
7
8
6
3
REGULATOR
IC3
DRIVER
+15V
IC9
P. W . M
IC8
D68
POWER SUPPLY
PHASE
SELECT
BASS
SELECT
M
21, 22 M1R, M1F
3 ERR
20 BSR
26 ERR
25 PH
IC13
M
L
R
INPUT 3
L
R
H.P.F. OUTPUT
IN
OUT
REMOTE
IC24
IC19A
H.P
.F.
12dB/oct.
SW2
80/100Hz
IC19B
H.P
.F.
12dB/oct.
SW2
80/100Hz
MUTING
Q1, 2
30 RMT
17 PW
MUSIC
SENSOR
IC4
REMOTE
CONTROL
SENSOR
U1
D41
■ BLOCK DIAGRAM
ABCDEFGH I J
1
2
3
4
5
6
7
YST-SW1500
17
■ PRINTED CIRCUIT BOARD (Foil side)
C140
G5
R313
J152
MAIN (1) P. C. B.
(Lead Type Device)
1
9
1
9
1
9
1
9
POWER (1)
VHI
POWER (1)
VHI
POWER
(1)
+5
+B
PW
E
POWER
(2)
MAIN
(2)
ERR
PW
PH
BASS
SIG
E1
+5
E2
DTC
+12
-12
MUTE
+12
-12
E
+B
Q42
Q44
Q35
Q30
Q29
Q34
Q43
Q41
Q20
Driver
SP+
SP-
DC 30mV
to 150mV
Idling Test Point
D1 G4
D2 F6
D3 F7
D4 E7
D5 E6
D6 F4
D7 G4
D8 F6
D9 F7
D10 F3
D11 F3
D12 G7
D13 E4
D14 E6
D15 C4
D16 C4
D17 C6
D18 C6
D19 D5
D20 D4
D21 D6
D22 D6
D23 D2
D24 E2
D25 E5
D26 E5
D27 D6
D28 E6
D29 E2
D30 E2
D31 C2
D32 F2
D33 E5
D34 F2
D35 C6
D36 C6
D37 C4
D38 C4
D39 E3
D40 E3
IC1 F6
IC2 F7
IC6 F5
IC10 F2
IC14 F2
IC15 E2
• Semiconductor Location
Q3 F6
Q4 F6
Q5 F5
Q6 G4
Q7 F5
Q8 F7
Q9 F7
Q10 E7
Q11 E7
Q12 F4
Q13 F3
Q14 F4
Q15 F3
Q16 F4
Q17 G3
Q18 E3
Q19 G4
Q20 B5
Q21 F7
Q22A E6
Q22C E4
Q24 E4
Q25 E6
Q26 E2
Q27 E2
Q28A D6
Q28C D5
Q29 B5
Q30 B5
Q32 E2
Q33A D6
Q33C D5
Q34 B4
Q35 B6
Q37 D2
Q38 D2
Q39A E4
Q39C E6
Q41 B3
Q42 B6
Q43 B4
Q44 B6
Q45 D2
Q46 E2
Q47 D3
Circuit No. J U, C K A B G
C1, 139, 140 X X O O O O
C118, 119 X O X X X X
CB11 X X O O O O
CB14 O O X X X X
G4, 5 X X O O O O
J3 OOXXXX
J16 X O X X X X
J152 X X O O O O
JK3 O O O X X O
G4 XXOOOO
L6 OXOOOO
R312, 313 O O X X X X
TE1, 2 X X X O O X
X: NOT USED
O: USED / APPLICABLE
2
ABCDEFGH I J
1
3
4
5
7
YST-SW1500
6
18
■ PRINTED CIRCUIT BOARD (Foil side)
R312
MAIN (2) P. C. B.
(Lead Type Device)
1918
1
1
8
8
+
R
OUTPUT
INPUT 1
INPUT
2
INPUT
3
H.P.F.
OUTPUT
H.P.F.
OUTPUT
AUTO
STANDBY
HIGH
LOW
OFF
100Hz80Hz
INPUTOUTPUT
L
--+
REMOTE
MAIN (1)
E
-12
+12
MUTE
+B
POWER (2)
HCUT
E
DIR
CSTI
CSTO
TMR
D69 B3
D70 B3
IC4 B3
IC11 F3
IC19 C3
IC24 E3
Q1 E3
Q2 D3
• Semiconductor Location
Circuit No. J U, C K A B G
C1, 139, 140 X X O O O O
C118, 119 X O X X X X
CB11 XXOOOO
CB14 OOXXXX
G4, 5 X X O O O O
J3 OOXXXX
J16 XOXXXX
J152 X X O O O O
JK3 OOOX X O
G4 XX OOOO
L6 OXOOOO
R312, 313 O O X X X X
TE1, 2 X X X O O X
X: NOT USED
O: USED / APPLICABLE
ABCDEFGH I J
1
2
3
4
5
6
7
YST-SW1500
19
■ PRINTED CIRCUIT BOARD (Foil side)
D59 C5
D60 G4
D61 E4
D62 C5
D63 B5
D64 H3
D65 D2
D66 D4
D68 D4
IC3 D4
IC5 C5
IC7 B5
• Semiconductor Location
IC8 C4
IC9 C4
IC17 B5
Q50 C5
Q51 G3
Q52 F3
Q53 B4
Q54 B4
Q55 B4
Q56 B5
C139
G4
C137
G3
C138
POWER (1) P. C. B.
(Lead Type Device)
MAIN (1)
PW
+B
+5
E
MAIN (1)
MAIN (1)
POWER (4)
INLET
18
7
1
8
14
169
Circuit No. J U, C K A B G
C1, 139, 140 X X O O O O
C118, 119 X O X X X X
CB11 X X O O O O
CB14 O O X X X X
G4, 5 X X O O O O
J3 OOXXXX
J16 X O X X X X
J152 X X O O O O
JK3 O O O X X O
G4 XXOOOO
L6 OXOOOO
R312, 313 O O X X X X
TE1, 2 X X X O O X
X: NOT USED
O: USED / APPLICABLE
2
ABCDEFGH I J
1
3
4
5
7
YST-SW1500
6
20
R315
R314
R302
Q57
J152
POWER (2) P. C. B.
(Lead Type Device)
C Version
STANDBY/ONB.A.S.S.
HIGH CUTVOLUME
110
19
19
115
1
10
30
16
POWER (3)
BSR
BSG
PWR
PWG
M2L
M3L
M1L
PH
+12
RMT
+5A
CSTI
CSTO
E2
MAIN (2)
HCUT
E
DIR
CSTI
CSTO
TMR
MAIN (1)
SIG
-12
+12
DTC
E2
+5
E1
BASS
PW
PH
ERR
POWER (2) P. C. B.
(Lead Type Device)
D Version
STANDBY/ONB.A.S.S.
HIGH CUTVOLUME
110
19
19
115
1
10
30
16
POWER (3)
BSR
BSG
PWR
PWG
M2L
M3L
M1L
PH
+12
RMT
+5A
CSTI
CSTO
E2
MAIN (2)
HCUT
E
DIR
CSTI
CSTO
TMR
MAIN (1)
SIG
-12
+12
DTC
E2
+5
E1
BASS
PW
PH
ERR
■ PRINTED CIRCUIT BOARD (Foil side)
D42 H3
D47 I3
D53 H3
D54 I3
D55 I4
IC12 H4
IC13 H3
IC16 H3
IC22 G4
IC23 G4
Q49 I3
• Semiconductor Location
NOTICE
The CPU B version must be used with the power P.C.B. C version.
The CPU C version must be used with the power P.C.B. D or later version.
Using the CPU with the P.C.B. of other than versions will hinder normal operation.
POWER P.C.B. C version SERIAL NO. : I015012WY~I041803YO
POWER P.C.B. D version SERIAL NO. : I041813ZP~
D42 C3
D47 D3
D53 D3
D54 E3
D55 E4
IC12 D4
IC13 D3
IC16 D3
IC22 B4
IC23 C4
Q49 D3
• Semiconductor
Location
Circuit No. J U, C K A B G
C1, 139, 140 X X O O O O
C118, 119 X O X X X X
CB11 XXOOOO
CB14 OOXXXX
G4, 5 X X O O O O
J3 OOXXXX
J16 XOXXXX
J152 X X O O O O
JK3 OOOX X O
G4 XX OOOO
L6 OXOOOO
R312, 313 O O X X X X
TE1, 2 X X X O O X
X: NOT USED
O: USED / APPLICABLE
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