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POWERED SPEAKER
MSR100/SMS100
SERVICE MANUAL
MSR100
CONTENTS
SPECIFICATIONS ................................................. 3
PERFORMANCE GRAPH .......................................... 4
PANEL LAYOUT ...................................... 4
CIRCUIT BOARD LAYOUT ................. 5
DIMENSIONS ............................................................ 5
LEVEL DIAGRAM ................................ 6
DISASSEMBLY PROCEDURE .............................. 7
IC BLOCK DIAGRAM ................................... 12
CIRCUIT BOARDS ......................................... 12
INSPECTIONS ............................................................ 17
BLOCK DIAGRAM
CIRCUIT DIAGRAM
This document is printed on chlorine free (ECF) paper. PARTS LIST
PA 011662 HAMAMATSU, JAPAN
20021201-56000 0.166K-7304 Printed in Japan '02.11
MSR100/SMS100
IMPOR TANT 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 under-
stood 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 per-
sonal injury, destruction of expensive components and failure of the product to perform as specified. For
these reasons, we advise all Yamaha product owners that all service required should be performed by an
authorized Yamaha Retailer or the appointed service representative.
IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certifi-
cation, recognition of any applicable technical capabilities, or establish a principal-agent relationship of
any form.
The data provided is belived 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 changes in specification 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 bus in the unit (heavy gauge black wires connect to
this bus.)
IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power
to the unit.
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 WHAT
SO EVER!
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.
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN
ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
As the colours of the wires in the mains lead of this apparatus may
not correspond with the coloured markings identifying the terminals in
your plug, proceed as follows:
The wire which is coloured GREEN and YELLOW must be
connected to the terminal in the plug which is marked by the letter E
or by the safety earth symbol or coloured GREEN and YELLOW.
The wire which is coloured BLUE must be connected to the terminal
which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the
terminal which is marked with the letter L or coloured RED.
* This applies only to products distributed by YAMAHA KEMBLE
MUSIC (U.K.) LTD.
WARNING
Components having special characteristics are marked and must be replaced with parts having specification equal to those
originally installed.
2
MSR100/SMS100
SPECIFICATIONS
General specifications
Type
2way Bass Reflex Powered Speaker
Speaker Unit
LF: 200 mm Cone
HF: 25.4 mm Compression Driver
Frequency Range..................55 Hz--20 kHz (10 dB)
Cross Over Frequency..........4 kHz
Maximum Output Level.........112 dB (1 m)
Dimension (W×H×D).............275 × 455.5 × 255 mm
Weight..................................11 kg
Color.....................................Black (Approximate Munsell
Value 5 PB2/1)
Accessories..........................Power supply cord 2.5 m (AC
Inlet type)
Option ..................................BWS50-190/260/320,
BCS251, BBS251
Amp. Unit
Max Power...........................100W at 1 kHz, THD=1%,
RL=6
Input Sensitivity....................INPUT 1: 50 dB* (MIC),
+4 dB* (LINE)
INPUT 2, 3: 10 dB*
Input Impedance..................INPUT 1, 2, 3: 10 k
Output Sensitivity.................LINK OUT: 10 dB*
Output Impedance...............LINK OUT: 10 k
Controls
LEVEL Control ...............INPUT 1, 2, 3, MASTER
EQ Control......................LOW: ±3 dB at 60 Hz
HIGH: ±6 dB at 10 kHz
POWER Switch..............ON/OFF
Connectors
INPUT 1..........................XLR-3-31 (balanced)
INPUT 2, 3......................Phone (unbalanced)
LINK OUT.......................Phone (unbalanced)
Indicator
POWER Indicator............Green LED
CLIP Indicator.................Red LED
Power Requirement
USA and Canada........... AC 120 V, 60 Hz
Europe............................AC 230 V, 50 Hz
Australia .........................AC 240 V, 50 Hz
Korea .................................AC 220 V, 60 Hz
Power Consumption.............70 W
* 0 dB=0.775 V
For European Model
Purchaser/User Information specified in EN55103-1 and
EN55103-2.
Inrush Current: 10A
Conformed Environment: E1, E2, E3 and E4
3
MSR100/SMS100
PERFORMANCE GRAPH
+10
RESPONSE (dB) 0
-10
-20
-30
-40
20 100 1k 10k
FREQUENCY (Hz)
PANEL LAYOUT
Rear Panel
1 [POWER] Switch
2 [INPUT1] Connector
3 Sensitivity Switch
4 [INPUT2] and [INPUT3] Connectors
5 [LEVEL] Controls
6 [EQ] Controls
7 [LINK OUT] Connector
8 [MASTER LEVEL] Control
9 [CLIP] Indicator
10 [POWER] Indicator
11 [AC IN] Connector
4
MSR100/SMS100
CIRCUIT BOARD LAYOUT
Right side view Rear view
IN
POWER AMPLIFIER
NETWORK IN INPUT
1
2
NETWORK
NEUTRIK
3
EQ
1
0 10
LEVEL
MIC(-50dB)
LINE(+4dB)
2
LINE
(-10dB)
0 10
LEVEL
3
LINE
(-10dB)
0 10
LEVEL
Power amplifier assembly HIGH
EQ LINK OUT
Power amplifier assembly
(-10dB)
-6 +6
LOW
-3 +3
MASTER
0 10
CLIP
POWER AMPLIFIER
LEVEL
AC
POWER
EQ
POWER
ON/OFF
POWER SWITCH POWERED SPEAKER
AC IN MODEL MSR100
PS
E
POWER SWITCH 100V 65W 50/60HzÅ`
MADE IN CHINA
Power transformer
SER.NO.
******
AC
Power transformer
DIMENSIONS
455.5
275 255
137
120
2-M8x25
Units: mm
( )
5
MSR100/SMS100
6
LEVEL DIAGRAM
INPUT1
( 50dBu/+4dBu)
LINE LOW EQ
LOW MASTER
MIC BOOST CUT LOW HIGH LEVEL P.AMP NW
HF
INPUT2
6 100W
( 10dBu)
INPUT3
LF
( 10dBu)
OUTPUT
( 10dBu) +29.9dBu (SP OUT)
INPUT1 +4dBu
( )
0dBu
-2.2dBu
-4.7dBu
-10dBu
INPUT2, 3
INPUT1
-50dBu
( )
MSR100/SMS100
DISASSEMBLY PROCEDURE
1. Front Grille Assembly
(Time required: About 1 minute)
1-1 Remove the four (4) screws marked [100A]. The front
grille assembly can then be removed. (Fig.1)
2. Speaker LF (Woofer)
(Time required: About 2 minutes)
2-1 Remove the front grille assembly. (See procedure 1.)
2-2 Remove the four (4) screws marked [80]. The
speaker LF (Woofer) can then be removed. (Fig.1)
2-3 Remove the wire LF (red/black) installed to the
speaker LF (Woofer). (Photo.1)
3. Front Cabinet Unit and Rear Cabinet Unit
(Time required: About 3 minutes)
3-1 Remove the front grille assembly. (See procedure 1.)
3-2 Remove the speaker LF (Woofer). (See procedure 2.)
3-3 Remove the five (5) screws marked [50A] and the four
(4) screws marked [50B]. The front cabinet unit and
the rear cabinet unit can then be divided. (Fig.1, 2)
Take care not to damage the speaker HF
(Tweeter) terminal when opening the front
cabinet unit and the rear cabinet unit.
Rear view
Front view
Rear cabinet unit
Front cabinet unit [50B]
[50B]
INPUT
1
2
NEUTRIK
3
1
0 10
[100A]
LEVEL
[100A] 2
MIC(-50dB)
LINE(+4dB)
[50A] [50A]
LINE
(-10dB)
0 10
LEVEL
3
[80]
LINE
[80]
(-10dB)
0 10
LEVEL
EQ LINK OUT
HIGH
(-10dB)
-6 +6
LOW
Front grille assembly Speaker LF (Woofer) -3
MASTER
+3
CLIP
0 10
LEVEL
POWER
[50A] [50A] POWER
ON/OFF
[80]
POWERED SPEAKER
[80]
AC IN MODEL MSR100
PS
E
100V 65W 50/60HzÅ`
MADE IN CHINA
SER.NO.
******
[100A] [100A]
[50A] [50B] [50B]
[50A]: Bind Head Tapping Screw-A [50B]: Bind Head Tapping Screw-A
5.0X35 BL (AAX42210) 5.0X35 BL (AAX42210)
[80]: Bind Head Tapping Screw-B
4.0X18 BL (AAX42230) Fig.2
[100A]: Bind Head Tapping Screw-B
4.0X10 BL (AAX12100)
Fig.1
Wire LF (Black)
Speaker LF (Woofer) Wire LF (Red)
Photo.1
7
MSR100/SMS100
4. Speaker HF (Tweeter)
(Time required: About 3 minutes)
4-1 Remove the front grille assembly. (See procedure 1.)
4-2 Divide the front cabinet unit and the rear cabinet
unit. (See procedure 3.)
4-3 Remove the wire HF (yellow/blue) installed to the
speaker HF (Tweeter). (Photo.2)
4-4 Remove the two (2) screws marked [46]. The speaker
HF (Tweeter) can then be removed from the front
cabinet unit. (Fig.3)
Front Cabinet Unit
[46]
Speaker HF (Tweeter)
Speaker HF (Tweeter)
Wire HF (Blue) Wire HF (Yellow)
Photo.2
[46]: Bind Head Tapping Screw-B 4.0X20 BL (AAX42200)
Fig.3
5. Network Assembly and NETWORK Circuit
Board (Time required: About 4 minutes)
5-1 Remove the front grille assembly. (See procedure 1.)
5-2 Divide the front cabinet unit and the rear cabinet
unit. (See procedure 3.)
5-3 Remove the four (4) screws marked [10e]. The
network assembly can then be removed from the
rear cabinet unit. (Fig.4)
5-4 Remove the four (4) screws marked [N40]. The
network holders C and D can then be removed from
the NETWORK circuit board. (Fig.4)
Remove the P1, P2 connector assembly soldered
to the NETWORK circuit board.
Rear Cabinet Unit
Network holder D
[N40]
[10e] NETWORK
[10e]: Bind Head Tapping Screw-B 3.0X10 BL (AAX10840)
[N40]: Cup Screw-B PW3.0X8 Y (AAX43390)
Network assembly
Network holder C Fig.4
8
MSR100/SMS100
6. Amplifier Assembly
(Time required: About 1 minute)
6-1 Remove the ten (10) screws marked [30]. The
amplifier assembly can then be removed. (Fig.5)
7. EQ Circuit Board, IN PCB Assembly and
IN Circuit Board
(Time required: About 3 minutes each)
7-1 Remove the amplifier assembly. (See procedure 6.)
7-2 Remove the eight (8) screws marked [210]. The
shield case assembly can then be removed. (Fig.5,
Photo.3)
7-3 EQ Circuit Board:
7-3-1 Remove the six (6) knobs marked [110] and the six
(6) hexagonal nuts marked [A]. The EQ circuit board
can then be removed. (Fig.5, Photo.3)
7-4 IN PCB Assembly and IN Circuit Board:
7-4-1 Remove the three (3) hexagonal nuts marked [130]
and the three (3) screws marked [160]. The IN PCB
assembly can then be removed. (Fig.5, Photo.3)
7-4-2 Remove the screw marked [150c]. The angle L can
then be removed from the IN circuit board. (Fig.6)
Rear view Shield case assembly
Amplifier assembly
[210] x 8 [30]
[30]
[30]
[A] x 6
INPUT
1
[180] x 8
2
[110] x 6
NEUTRIK
3
1
0 10
LEVEL
MIC(-50dB)
[160] x 2 2
LINE(+4dB)
Power amplifier assembly
LINE
(-10dB)
0 10
[130] x 3 3
LEVEL
LINE
(-10dB)
0 10
[30] HIGH
LEVEL
EQ LINK OUT [30]
(-10dB)
-6 +6
[160] LOW
-3 +3
POWER AMPLIFIER
EQ MASTER
0 10
CLIP
[20]
[30] LEVEL
POWER
POWER
ON/OFF
[30]
IN
AC IN
POWERED SPEAKER
MODEL MSR100
PS
Power transformer
[100B] x 2
E
100V 65W 50/60HzÅ`
MADE IN CHINA
SER.NO.
******
Push knob
[30]
POWER SWITCH
[30] AC [30] [20]
[20]: Bonding Tapping Screw-B 4.0X8 BL BO (AAX43620)
[30]: Bind Head Tapping Screw-B 4.0X14 BL (AAX42170)
[100B]: Bonding Tapping Screw-B 3.0X10 BL BO (AAX12110)
[130]: Hexagonal Nut M12.0 BL
[160]: Bonding Tapping Screw-B 3.0X10 BL BO (AAX12110)
[180]: Pan Head Tapping Screw-B 3.0X12 BL (AAX43370)
[210]: Bonding Tapping Screw-B 3.0X10 BL BO (AAX12110)
[A]: Hexagonal Nut
Washer
Fig.5
9
MSR100/SMS100
Amplifier Assembly IN PCB Assembly
Front view Shield case assembly
Power amplifier assembly
IN PCB assembly IN
IN
POWER AMPLIFIER
EQ
[150c]
Angle L
[150c]: Cup Screw-B
POWER SWITCH
PW3.0X8 Y (AAX43390)
Power transformer
Fig.6
Power transformer assembly Power switch assembly
AC
Photo.3
8. Power Amplifier Assembly and POWER
AMPLIFIER Circuit Board
(Time required: About 4 minutes)
8-1 Remove the amplifier assembly. (See procedure 6.)
8-2 Remove the shield case assembly. (See procedure
7-2.)
8-3 Remove the eight (8) screws marked [180]. The
power amplifier assembly can then be removed.
(Fig.5, Photo.3)
8-4 Remove the screw marked [P40], the five (5) screws
marked [P80] and the four (4) screws marked [P90].
The POWER AMPLIFIER circuit board can then be
removed. (Fig.7)
Power Amplifier Assembly
[P80]
[P90]
[P80]
[P40]
[P80]
[P40]: Bind Head Tapping Screw-B 3.0X10 BL (AAX10840)
[P80]: Cup Screw-B PW3.0X8 Y (AAX43390)
[P90]: Cums Head Screw SP3.0X14 BL (AAX43410)
POWER AMPLIFIER
Fig.7
10
MSR100/SMS100
9. Power Transformer Assembly (Power
Transformer and AC Circuit Board)
(Time required: About 3 minutes)
9-1 Remove the amplifier assembly. (See procedure 6.)
9-2 Remove the four (4) screws marked [20]. The power
transformer assembly can then be removed. (Fig.5,
Photo.3)
9-3 Remove the power transformer soldered to the AC
circuit board. (Photo.4)
10. Power Switch Assembly and POWER
SWITCH Circuit Board
(Time required: About 3 minutes)
10-1 Remove the amplifier assembly. (See procedure 6.)
10-2 Remove the two (2) screws marked [100B]. The
power switch assembly can then be removed. (Fig.5,
Photo.3)
10-3 Remove the two (2) screws marked [90d]. The power
switch holder and the push knob can then be
removed from the POWER SWITCH circuit board.
(Fig.8)
Power Transformer Assembly Power Switch Assembly
[90d]
Push knob
Power transformer
Power switch holder
POWER SWITCH
Soldering AC
[90d]: Flat Head Screw 3.0X6 BL (AAX42430)
Photo.4 Fig.8
11
MSR100/SMS100
IC BLOCK DIAGRAM
µPC4570HA (AAX42560)
Dual Operational Amplifier
+
+
A B
- -
EQ: IC201-203
IN: IC101,103 1 2 3 4 5 6 7 8 9
+V -IN -V -IN +V
OUT +IN +IN OUT
A A A B B B
CIRCUIT BOARDS
AC Circuit Board (6448D-20) ...........................................................12
EQ Circuit Board (6448B-20) ...........................................................14
IN Circuit Board (6448A-20) .............................................................15
NETWORK Circuit Board (6448F-20) ..............................................16
POWER AMPLIFIER Circuit Board (6448C-20) ...............................13
POWER SWITCH Circuit Board (6448E-20) ....................................12
Note: See parts list for details of circuit board component parts.
AC Circuit Board
to POWER AMPLIFIER
-CN302, CN304
Component side Pattern side
POWER SWITCH Circuit Board
POWER ON/ OFF
to AC IN
Component side Pattern side
12 AC, POWER SWITCH: 374005
MSR100/SMS100
POWER AMPLIFIER Circuit Board
to AC-BC803
to EQ-BC202
to NETWORK-P1, P2
to IN-BC102
to EQ-BC201
Component side Pattern side
POWER AMPLIFIER: 374005
13
MSR100/SMS100
14
EQ Circuit Board
EQ INPUT
MASTER LEVEL LOW HIGH 3 LEVEL 2 LEVEL 1 LEVEL
Component side
to POWER AMPLIFIER-CN305 to IN-BC101
to POWER AMPLIFIER-CN301
Pattern side
EQ: 374005
IN: 374005
IN Circuit Board
to POWER AMPLIFIER-CN306
to EQ-CN201
Component side
RED GREEN
MIC/LINE CLIP POWER
1 2 3 LINK OUT
LINE LINE
INPUT
Pattern side
MSR100/SMS100
15
MSR100/SMS100
NETWORK Circuit Board
to Speaker LF to Speaker HF
(WOOFER) (TWEETER) to POWER AMPLIFIER-BC301
BLACK
RED BLACK YELLOW BLUE RED
Component side
Pattern side
NETWORK: 374005
16
MSR100/SMS100
INSPECTIONS
1. Test Conditions
(1) Measuring Voltage AC100V 50/60Hz (J)
AC120V 60Hz (U, C, V)
AC240V 50Hz (A)
AC230V 50Hz (B, H, W)
AC220V 60Hz (K)
(2) Load 6
(3) Input 1KHz
(4) MASTER LEVEL VR MAX.
(5) Tone-control VR HIGH, LOW Center.
2. Environment
(1) Ambient Temperature 25 ± 5°C
(2) Ambient Humidity 65 ± 5%
3. Inspections
Items Input Conditions Output Conditions Nominal Limit
No.
Output Power INPUT1, SW-LINE 1%THD Output 104W >100W
1
INPUT1 LEVEL=MAX.
T. H. D. INPUT1, SW-LINE 80W Output
2 0.02% <0.1%
INPUT1 LEVEL=MAX.
LINK OUT Level INPUT2=-10dBu
3 LINK OUT -9.5dBu -10dBu ± 2dB
INPUT2 LEVEL=MAX.
INPUT1, SW-MIC
-50dBu -50dBu ± 2dB
INPUT1 LEVEL=MAX.
INPUT1, SW-LINE
+3.5dBu +4dBu ± 2dB
Input Sensitivity INPUT1 LEVEL=MAX. REF.: 100W Output
4
INPUT2 -10dBu -10dBu ± 2dB
INPUT2 LEVEL=MAX.
INPUT3
-10dBu -10dBu ± 2dB
INPUT3 LEVEL=MAX.
REF.: 1W Output
60Hz +4.6dB +5 ± 3dB
Frequency Response INPUT1, SW-LINE
5
REF.: 1KHz REF.: 1W Output
10KHz +1.2dB +1.5 ± 3dB
LOW = MIN.
-3.0dB -3 ± 2dB
REF.: 100Hz, LOW VR Center
LOW = MAX.
Tone-control +3.0dB +3 ± 2dB
6 REF.: 100Hz, LOW VR Center REF.: 1W Output
Characteristic
HIGH = MIN.
-5.5dB -6 ± 2dB
REF.: 10KHz, HIGH VR Center
HIGH = MAX.
-6.0dB +6 ± 2dB
REF.: 10KHz, HIGH VR Center
Signal To Noise Input Short
Ratio REF.: 100W Output 85dB >80dB
7
Residual Noise MASTER LEVEL=MIN.
8 SP-OUT 0.2mV <1.0mV
SW-LINE
(Note): 1dBu = 0.775V
17
A B C D E F G H I
MSR100/SMS100
MSR100/SMS100 BLOCK DIAGRAM
1
IN EQ
MIC/LINE +15V VR201
MIC IC202-2/2 IC202-1/2 IC203-2/2
+ (-50dB) (9P) (9P)
MIC AMP
INPUT1 LOW EQ
JK101 Q101~104
IC101-1/2 LEVEL IC201-1/2 BOOST HPF LOW HIGH
CN201 (8P)
BC101 (8P)
INPUT1 1 2 + LINE S101 (9P) +15V +15V
(-50dB/+4dB) -15V +15V (+4dB) +15V 9 9
VR202 9 VR206
3 + 6+ 9 -15V
3- 2 6 8 4 2 7 8
8 +15V SUM 2
5 Q105, 106 INPUT2 5
7 D111 MASTER
LEVEL -15V 5 5
S101 -15V CONTROL VR204 VR205 LEVEL
-15V -15V
GND IC101-2/2 VR203 VOLTAGE AMP
IC103-1/2 (9P) CLIP (RED)
EQ EQ
(9P) IC201-2/2 IC203-1/2 LOW HIGH +B2 R234
+15V INPUT3
JK102 9 LEVEL CLIP DETECTOR
D112 GND - Q201
INPUT2 4 + 2 GND GND ~207
POWER 8 7
LINE (GREEN) +B2
5
(-10dB) -B2 -B2 R235
-15V IC104 3
+15V
IC103-2/2 (3P) BC202 (2P) BC201 (5P)
JK103 3 1
+15V
INPUT3 6 8
+ 2 POWER AMPLIFIER
LINE
(-10dB) GND
CN306 (3P)
BC102 (3P)
GND
-15V
CN305 (2P)
IC105 (3P) GND D308
+B2
3 2 +B1
JK104 -15V -B1
LINK OUT 1
(-10dB) -B2
GND 4
POWER AMP
CN301 (5P)
+B2
POWER SWITCH AC
Power Transformer