Soavo-900SW

Advanced YST II and Front Firing Subwoofer

NEW PRODUCT BULLETIN

Soavo series subwoofer designed for the finest possible music reproduction, featuring Advanced YST II, high performance digital amplifier, 25cm (10) F.B.P. diaphragm and beautiful birch veneer enclosure.
The Soavo-900SW is offered with dark brown, brown birch, natural birch, or black finish.

Powerful, Accurate Sound

Advanced YST II (Yamaha Active Servo Technology II) New 25cm (10) F.B.P. (Fiber Blend Paper) diaphragm with diecast aluminium frame 600W high performance digital amplifier built in Twin wooden Linear Ports
Main Specifications Output Power (4 ohms, 100Hz, 10% THD) Frequency Response High Cut Filter (Continuously Variable) Driver Standby Power Consumption Dimensions (W x H x D) Weight Advanced YST Plinciple
600 W 18160 Hz 40140 Hz 25cm (10) multi-range 0.5 W 410 x 457 x 462 mm; 16-1/8 x 17-15/16 x 18-3/kg; 70.1 lbs.

Cabinet

Heavy-duty construction Birch veneer cabinet with piano-quality open-pore finish
Advanced NegativeImpedance Converter

Convenient Features

Three BASS (Bass Action Selector System) modes Three memory presets Continuously variable high cut filter Full-function remote control unit Sleep timer
P10017840W-Soavo900SW@NPB
Mid/High Amplitude Bass Sound
Active Servo Processing Amplifier Inaudible Low Applitude Signal

Signals

Low Amplitude Sound
Air Woofer Port (Helmholtz Resonator)
d-cinema is the slogan of Yamaha A/V products and technology, reflecting our focus on digital technology and our leadership in creating and refining digital home theatre.

Soavo-900SW Subwoofer

Soavo-900SW Concept In broad terms, music can be divided into two parts one part with sound and the other without. The silent moment while waiting for a sound explosion to come, or the pulse after a beautiful reverberation, are created by a combination of the two parts, both of which play an essential role in providing musical pleasure. The designers of the Soavo-900SW took the bold step of emphasizing not only the sound, but also the spaces in between. By being conscious of the intervals between the sounds, they aimed to express the depth and spaciousness of the music more effectively. Furthermore, the Soavo-900SW meets the challenge of providing an ideal balance between tight sounds (with crisp, fast attack) and deep sounds (with a spacious feeling). Although these two types of sounds, by definition, tend to oppose each other, this subwoofer is capable of representing the tone intervals of all kinds of sounds, adding an ideally balanced flavour to the music. Just as a seasoning enhances but does not obscure the flavour of food, the Soavo-900SW enhances the musical expression of the performers without interfering with the main speakers. Finally, the enjoyment derived from the Soavo-900SW is not restricted to your ears with it's impressive power it lets you feel the music, too. Designed for extremely accurate music reproduction, the Soavo-900SW subwoofer proudly takes its place in Yamahas Soavo Series. POWERFUL, ACCURATE SOUND Advanced YST II Yamaha's Advanced YST II (Yamaha Active Servo Technology II) combines negativeimpedance and constant-current principles to drive the speaker cone with extremely tighter control. Using Advanced Negative Impedance Converter (ANIC) circuits, this system dynamically optimizes effective speaker impedance to maintain excellent linearity. This means more stable and accurate low range response, not to mention higher sound pressure levels. This means more stable and accurate low range response, higher sound pressure levels, and the ability to reproduce clear bass without muddiness. High Performance Driver The 25cm (10) cone driver uses a new Yamaha-developed material consisting of paper with a blend of carbon fibers and aramid fibers. Its extreme stiffness and extra-long stroke prevent distortion from occurring even during large, deep bursts of sound. A large, powerful magnetic circuit also contributes to the drivers fast response. The unit is firmly supported by a strong diecast aluminium frame.

entire cabinet behaves as a single unit. This improves low frequency response and reduces unwanted vibration. A thick baffle (37mm; 11/2) also minimizes vibration, adding to the overall benefits of the stiff cabinet construction. Birch Veneer Cabinet with Open-Pore Finish Birch is an acoustically excellent material that is used in Yamaha pianos. Yamahas long decades of woodworking expertise have confirmed the superior performance of birch veneer for speaker cabinets, particularly in the shading of bass sounds. The cabinet is given the same luxurious and environmentally friendly (non-PVC) open-pore finish used on Yamahas finest wood-grain pianos. Embedded switches also show the scrupulous care that Yamaha has taken in designing this subwoofer. CONVENIENT FEATURES Three BASS Modes The BASS (Bass Action Selector System) function provides a selection of three modes to match the source being listened to. Wide for powerful sound with movies, Normal for natural sound with music and movies, and Narrow to cut unnecessary bass from music sources to enjoy clearer sound quality. Full-Function Remote Control Unit The remote unit makes it convenient to operate the subwoofer. It lets the user turn the power on and off, adjust the volume, adjust the high cut filter, select phase (normal/reverse), select BASS mode, engage the sleep timer and set and select the preset memories. Three Preset Memories Three combinations of settings (volume, BASS, high cut filter and phase) can be memorized and recalled at the touch of a button on the remote unit. Sleep Timer Engaging the sleep timer shuts off the power after two hours. This is both handy and energy-saving, because people often forget to turn off their subwoofer. Other Notable Feafures Continuously variable high cut filter (40 140Hz) LFE terminal (bypasses the high cut filter) Power can be turned on and off using a Yamaha receiver/amp remote unit Remote controllable motor-driven volume control Low power consumption with standby power of 0.5W Gold-plated terminals Frequency response: 18 160Hz Heavy construction: 32kg (70.1lbs.)
600W Digital Amplifier The Soavo-900SW has a high-end audio component built in! its 600W digital amplifier. Featuring Yamahas exclusive Power Engine chipset, it uses a constant gain PLL modulator circuit, a cross feedback loop circuit, an Active Power Control system, a highly efficient power supply and the highest quality parts. It delivers exceptionally high levels of power and sound quality, yet with low power consumption and compact size.

Yamaha original digital amplifier, and power transformer (4.2kg; 9.3lbs.) and custom-made block capacitors
Front Firing Design The front firing design ensures extremely fast response and attack, and is especially suited to the accurate reproduction of music. Twin Wooden Linear Ports The wooden ports are carved from a block of alder wood and aesthetically match the enclosure, the twin ports provide more port area without increasing the subwoofers size, as one large port would do. The shape is based on a natural logarithm to prevent extraneous wind noise.

Effect of Linear Port

Advanced YST II produces rich bass sound, and the addition of two Linear Ports increases bass output.
CABINET Heavy-Duty Construction with Three-Way Mitered-Joint Construction The Soavo-900SW employs three-way mitered-joint construction at the cabinet corners and baffle/body connections to increase the tightness of the joints so the
Product designs and specifications are subject to change without notice.

SUBWOOFER SYSTEM

Soavo-900SW

SERVICE MANUAL

STANDBY

B.A.S.S.

MEMORY

PRESET 2

HIGH CUT

VOLUME

WH64300

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. recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or
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.
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.

s CONTENTS

TO SERVICE PERSONNEL... 2 FRONT PANEL... 3 REAR PANELS.. 35 REMOTE CONTROL PANEL.. 6 SPECIFICATIONS / 6 DIMENSIONS... 7 INTERNAL VIEW... 7 DISASSEMBLY PROCEDURES / 810 REPAIR PROCEDURES / 1114 DC OFFSET ADJUSTMENT / 1415 IC DATA... 16 BLOCK DIAGRAM.. 17 PRINTED CIRCUIT BOARDS.. 1820 SCHEMATIC DIAGRAMS. 2122 REPLACEMENT PARTS LIST.. 2334 REMOTE CONTROL.. 35

101027

2006 YAMAHA CORPORATION. All rights reserved. This manual is copyrighted by YAMAHA and may not be copied or redistributed either in print or electronically without permission.

s 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.

WALL OUTLET

EQUIPMENT UNDER TEST
AC LEAKAGE TESTER OR EQUIVALENT

INSULATING TABLE

Meter impedance should be equivalent to 1500 ohms shunted by 0.15F. Leakage current must not exceed 0.5mA. Be sure to test for leakage with the AC plug in both polarities.

CAUTION

F1 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 12A, 125V FUSE.

F1 : REPLACE WITH SAME TYPE 12A, 125V FUSE.

ATTENTION

F1 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 12A, 125V.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY 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.

About Lead Free Solder

All of the P.C.B.s installed in this unit and solder joints are soldered using the lead free solder. Among some types of lead free solder currently available, it is recommended to use one of the following types for the repair work. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) Sn + Zn + Bi (tin + zinc + bismuth)

Caution:

As the melting point temperature of the lead free solder is about 30C to 40C (50F to 70F) higher than that of the lead solder, be sure to use a soldering iron suitable to each solder.

s FRONT PANEL

s REAR PANELS

w U, C models

w R model

w T model

w K model

w A model

w B, G models

w L model

w J model

s REMOTE CONTROL PANEL

s SPECIFICATIONS
Type / Output Power / 100 Hz, 4 ohms, 10 % T.H.D.. 600 W Input Sensitivity / (50 Hz, 600 W/4 ohms, L+R) INPUT (SP)... 1.2 V INPUT (PJ).. 70 mV Input Impedance / INPUT (SP).. 2.2 k-ohms INPUT (PJ)... 12 k-ohms Frequency Response / Driver / Input Section / INPUT 1.. Speaker terminal INPUT 2, 3.. RCA pin jack Operation Section / Top Panel.. STANDBY/ON switch, Volume control, H-CUT control, LED indicator Rear Panel.. Power switch, Voltage selector (R, L models) Power Supply / U, C models... AC 120 V, 60 Hz R, L models. AC 110, 120, 220, 230-240 V, 50/60 Hz T model.. AC 220 V, 50 Hz K model.. AC 220 V, 60 Hz A model.. AC 240 V, 50 Hz

U C R T K. USA model. Canadian model. General model. Chinese model. Korean model A B G L J. Australian model. British model. European model. Singapore model. Japanese model
Advanced Yamaha Active Servo Technology II
B, G models... AC 230 V, 50 Hz J model.. AC 100 V, 50/60 Hz Power Consumption / U, C, R, T, K, A, B, G, L models. 180 W J model... 120 W Standby Power Consumption /.. 0.5 W (reference data) Dimensions (W x H x D) /. 410 mm x 461 mm x 461.5 mm (16-1/8 x 18-3/16 x 18-3/16) Weight / Finish /.. 32 kg (70 lbs. 9 oz.) Birch color (MN) Brown color (MB) Dark brown color (MD) Black color (BL) Accessories /. Power cable x1, Remote control x1, Battery x2, Speaker cable (4 m) x1 (J model), Subwoofer cable (5 m) x1 (J model)
* Specifications subject to change without notice.
18 Hz to 160 Hz 25 cm (10) cone woofer Magnetic shielding type

s DIMENSIONS

461 (18-3/16")

4 (3/16")

457 (18")

410 (16-1/8")

30 (1-3/16")
410 (16-1/8") 461.5 (18-3/16")

21.5 (7/8")

Unit : mm (inch)

s INTERNAL VIEW

q w e r t y
q DRIVER w MAIN (4) P.C.B. e MAIN (3) P.C.B.
r DIGITAL P.C.B. t MAIN (2) P.C.B. y MAIN (1) P.C.B. u MAIN (7) P.C.B. (R, L models) i POWER TRANSFORMER o MAIN (6) P.C.B. !0 MAIN (5) P.C.B.

s DISASSEMBLY PROCEDURES

(Remove parts in the order as numbered.) Disconnect the power cable from the AC outlet.
1. Removal of Front Grille Ass'y
* The front grille ass'y is fixed to the cabinet with dowels at 5 locations. As a flatblade screwdriver is used for removal, use special care not to cause damage to the cabinet ass'y.
a. Using the flatblade screwdriver inserted in the gap between the front grille ass'y and the cabinet ass'y (bottom side first), push up the front grille ass'y. (Fig. 1) b. Remove the front grille ass'y by lifting a metalblade up. (Fig. 1)
* When installing the front grille ass'y, apply quick-drying bond or the like to dowels and then fit them into dowel holes for secure installation. (The front grille ass'y will come off easily if its dowels are fitted into dowel holes without applying quickdrying bond or the like.)

Cabinet Ass'y

Driver

Front Grille Ass'y

Dowels

Metalblade

Flatblade Screwdriver

Fig. 1

2. Removal of Driver a. Remove 8 screws ( q ) and then remove the driver. (Fig. 1)
* Use an allen wrench (4mm) to unscrew the driver.
b. Disconnect the connector connected to the terminal of the driver. (Fig. 1) 3. Remove of Rear Panel Assy a. Remove 12 screws ( w ) and then remove the rea panel assy. (Fig. 2)
* * Arrow marks ( be removed. When assembling the rear panel assy, check to ensure that packing is not damaged so as to prevent air leakage from occurring. ) are printed to identify the screws to
b. Remove CB4, CB5, CB15 (U, C, T, K, A, B, G models), CB16-17, CB20 and CB22. (Fig. 3) c. Remove CB13 and CB14. (R, L models) (Fig. 3)

Rear Panel Ass'y

Fig. 2

MAIN (1) CB20 CB4 CB22

MAIN (2)

DIGITAL

CB5 CB16 CB17 CB15 (U, C, T, K, A. B, G, J models)

MAIN (5)

MAIN (6)

MAIN (7)

Fig. 3

(R, L models)

4. Removal of Front Panel Assy Remove 4 screws ( e ) and then remove the front panel assy. (Fig. 4) 5. Removal of Power Transformer Remove 4 screws (r ) and then remove the power transformer. (Fig. 4) 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. Connect all the connectors removed during disassembly back to the original positions.

Front Panel Ass'y

Power Transformer

Fig. 4

Supporting Wood

Fig. 5

s REPAIR PROCEDURES
Safety Measures Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves. C77 and C80 on the MAIN (1) P.C.B. are dangerous, for a high voltage is retained there even after the power is turned off. Before the repair work, connect about 5k-ohm/10W resistor between terminals of the capacitor to forced discharging. After the repair work, also perform forced discharging by connecting about 5k-ohm/10W resistor between terminals of the capacitor. Replacing Faulty Parts Described below is the method to diagnose trouble of the major parts. FET (Q108, 109, 110, 111) If a trouble exists, the D-S resistance value should be close to 0-ohm. (The normal value should be 1k-ohm or more.)

DIGITAL P.C.B. (side A)

q Operation Check
Caution: When taking measurement at the following points for operation check, do not use a voltmeter or the like which may cause a failure.
Pin 10 of IC102 Pin 14 of IC102 Pin 10 of IC103 Pin 14 of IC103 Gate of Q108 Gate of Q109 Gate of Q110 Gate of Q111

Base of Q125 Emitter of Q125 Base of Q126 Emitter of Q126 Base of Q127 Emitter of Q127 Base of Q128 Emitter of Q128 D115118 R166169

Pin 14

Pin 10

DIGITAL P.C.B. (side B)

Required Tools Voltmeter Signal generator (100Hz, Sine wave) 4-ohm load resistor Oscilloscope
1. Output Voltage Check a. Disconnect CB22 of the MAIN (1) P.C.B. so that no load is applied. b. Connect the power cable of this unit to the AC outlet. c. Set the POWER ON/OFF key of this unit to the ON position and press the STANDBY/ON key. d. Measure the DC voltage between SP+ and GND and also between SP and GND.
Normal value between SP+ and GND: +50V 5V between SP and GND: +50V 5V +50V 5V +50V 5V

MAIN (1) P.C.B. (side A)

SP SP+

GND SP+

e. Set the POWER ON/OFF key of the main unit to the OFF position and disconnect the power cable from the AC outlet. 2. Output Waveform Check a. Connect the output signal from the signal generator to INPUT 3 L/MONO. b. Disconnect the connector connected to the speaker unit and connect it to the 4-ohm load resistor. c. Turn on the power of the signal generator and set for the sine wave, 100Hz and output level minimum.
d. Connect the power cable of this unit to the AC outlet. e. Set the POWER ON/OFF key to the ON position and press the STANDBY/ON key. f. Using the oscilloscope, measure the output waveform between SP+ and SP. g. Increase the output level of the signal generator and Soavo-900SW volume gradually and measure the output waveform using the oscilloscope. h. If the output waveform is not distorted until the output level reaches 50Vp-p, it is judged as normal. i. Set the POWER ON/OFF key to the OFF position and disconnect the power cable from the AC outlet.

s DC OFFSET ADJUSTMENT

Precaution for handling measuring instrument As the speaker output is B.T.L. connected, it is necessary to make the ground side of the measuring instrument to be connected to the speaker terminal loose. Condition Start adjustment 5 sec or more after the power is turned on. No input signal. Non loaded condition DC offset adjustment Adjust the potentiometer (VR101) on the DIGITAL P.C.B. so that the DC voltage becomes mV at speaker
output CB22 on the MAIN (1) P.C.B.
MAIN (1) P.C.B. (side A) DIGITAL P.C.B. (side A)

DIGITAL P.C.B.

MAIN (1) P.C.B.

s IC DATA

IC7 : LC651152N-4N21-E (MAIN (1) P.C.B.) 8-bit Microprocessor
PG0/AD4 PG1/AD5 PG2/AD6 PG3/AD7 AV+ AVVSS OSC1 OSC2 VDD RES TEST PF0/SI PF1/SO PF2/SCK
PA3/AD3 PA2/AD2 PA1/AD1 PA0/AD0 PE1/WDR PE0 PD3 PD2 PD1 PD0 PC3 PC2 PC1 PC0 PF3/INT

PA0/AD0 27

Port A

PA3/AD3 30

I/O Buffer

RAM F WR

PC STACK 1 DP STACK 8

AV+ 5 AV- 6 PG0/AD4 1

8 bit ADC

I. DEC

Port G

PG3/ADPC0 17

Port C

System Bus

PC3 20
E AC ALU Port D Serial Mode Register Serial Mode Register

PDPDPF1/SO 14

4/8 bit Serial Shift Register Lower Digit 4 bit Serial Shift Register Higher Digit 4/8 bit Port E Port F
STS CF ZF EXTF TMF CSF ZSF

OSC I/O Bus

OSC1 OSC2

11 RES 12 TEST 10 VDD 7

PF0/SI 13 PF2/SCK 15 PF3/INT 16

No. 29 30

Port Name PG0/AD4 PG1/AD5 PG2/AD6 PG3/AD7 AV+ AVVSS OSC1 OSC2 VDD RES TEST PF0/SI PF1/SO PF2/SCK PF3/INT PC0 PC1 PC2 PC3 PD0 PD1 PD2 PD3 PE0 PE1/WDR PA0/AD0 PA1/AD1 PA2/AD2 PA3/AD3
I/O OUT OUT A/D IN POWER GND GND CLK CLK POWER IN GND OUT OUT OUT IN OUT OUT OUT OUT OUT OUT OUT OUT OUT IN A/D A/D OUT IN
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 Remote control signal detection Power supply relay driving output Speaker relay output Low cut filter control A Low cut filter control B 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 Danger preview input check pulse output Standby terminal

s BLOCK DIAGRAM

See page 21 SCHEMATIC DIAGRAM
TE1 + L INPUT1 R + + L IC1A 67 + 5 IC2A 21 + 3 L.P.F. 6dB/oct IC2B 5+ L.P.F. 12dB/oct A.N.I.C IC13,14,Q20-22

IC3A 4+ L.P.F. 12dB/oct

6+ L.P.F. 12dB/oct

IC4A 3+ 4 2

IC4B 6+ 7 H.P.F. 12dB/oct

IC5A + H.P.F. 12dB/oct

VR1 VOLUME IC5B 6+ 7 8
PHASE SELECT RY3 IC12A + 4 IC12B 8 + 6 L.P.F. 6dB/oct 7
MOSFET Q108 XL101 CLOCK 2MHz MODULATOR IC101 DRIVER IC103 DRIVER IC102 MOSFET Q109 MOSFET Q110 MOSFET Q111
L.P.F L101 C153 FILTER L.P.F L101 C153 FILTER FILTER L112

DRIVER WOOFER RY1

OUTPUT R + PJ1 L/MONO INPUT3 R PJ2 L INPUT2 (LFE) R IC1B 21 + 3 VR2 POSITION SEARCH VR2
H-CUT M VR2 H.P.F SELECTOR IC9
L.P.F. 6dB/oct DRIVER M MOTOR DRIVER IC8 Q7

+ DRIVER Q14,15

MOTOR DRIVER IC6

VR1 POSITION SEARCH

FEEDBACK +5 -5
IC109 IC110 REGULATOR IC111 -15D +15D
See page 22 SCHEMATIC DIAGRAM

PROTECTION Q116,117,121

19,20 HPCA,HPCB

23,24 M2R,M2F

27 M1A

28 M2A

M1R,M1F

Q16 PROTECTION

U1 REMOTE CONTROL SENSOR
+B 26 ERR 3 DTC 18 SPRY 17 PWRY 11 RES -15D +15 IC16 +15D DIGITAL P.C.B. IC15 REGULATOR

POWER SUPPLY D37

RMT 16

MICROPROCESSOR

DRIVER Q19 POWER TRANSFORMER L4 F1 RY2 POWER ON/OFF SW1 AC IN

M1L,M2L,M3L 13,14,15

PWG,PWR 1, 2
IC17 REGULATOR POWER SUPPLY D38 T2

LED SELECT IC10

CLOCK 2MHz XL1

STANDBY/ON SW4

+5 REGULATOR POWER SUPPLY D27
STANDBY/ON, PHASE, B.A.S.S. 1,2,3 PRESET 1,2,3 D5-9,11-13

RESET CIRCUIT Q6

s PRINTED CIRCUIT BOARDS

POWER TRANSFORMER

Point q (Pin 8 of IC7)
(U, C, T, K, A, B, G, J models)

(Side A)

MAIN (2) P.C.B.

OUTPUT INPUT 1 L R

5 k-ohms 10W

W5B, W6B

INPUT 2 (LFE) L/R INPUT 3 L/MONO /R
Point w CH 1 : Out of IC11 CH 2 : Pin 11 of IC7

DRIVER WOOFER

MAIN (1) Circuit No. CB11 CB19 R120 C62 R107 D31 Q17,18 R117 C65 C66 CB15 W8, 9 G1 C149, 150 J X O X X X X X O X O O X O O U, C X O X X X X X O X O O X O O R, L X O O O O O O X O X X O X X T, K O X X X X X X O X O O X O O A O X X X X X X O X O O X O O B,G O X X X X X X O X O O X O O
AC POWER ON (Connect the power cable)
AC POWER OFF (Disconnect the power cable)

MAIN (3)

X: NOT USED O: USED/APPLICABLE

MAIN (3) CB3

Safety Measures Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves. C77 and C80 on the MAIN (1) P.C.B. are dangerous, for a high voltage is retained there even after the power is turned off. Before the repair work, connect about 5k-ohm/10W resistor between terminals of the capacitor to forced discharging. After the repair work, also perform forced discharging by connecting about 5k-ohm/10W resistor between terminals of the capacitor.

MAIN (3) P.C.B.

STANDBY /ON H-CUT

MAIN (4) P.C.B.

MAIN (6) P.C.B.

PRESET

STANDBY /ON

MAIN (1)

W5A, W6A
R, L models MAIN (5) P.C.B.

MAIN (7) P.C.B.

POWER ON/OFF

W8A, W9A

MAIN (1) CB23

VOLTAGE SELECTOR

240V 220V 110V 120V

1 2/3/4/5/8

(Side B)

MAIN (1) W10

DC OFFSET ADJUSTMENT
Point e (Pin 23 of IC101)
5 MAIN (1) W11 MAIN (1) W12
s SCHEMATIC DIAGRAMS MAIN

L INPUT 1/ OUTPUT R

Page 22
To DIGITAL CB101 To DIGITAL CB105 K-4
0 14.14.8 0.1 14.0 0.1 0.1 0.-14.9 0.1 0.1 0.1

L/MONO

0 -14.0

To DIGITAL CB106

INPUT 3 (NORMAL)

R L INPUT 2 (LFE)

0 -14.14.8 49.-1.1 -1.7 -1.1 49.6 49.6 49.1
0.1 L2 0.1 0.1 -14.9 0.1 14.8 -3.4 0.1 47/50 0.1 -5.1 -14.9 -3.4 -1.7

14.0 -14.8 0

0.1 -5.1

0 101.2 49.2 42.7 AC73.6

C5099 [Q/P/Y] 0

-14.0 0

14.-22.6 21.1 14.0.1 0.1 21.3
IC1, 2: NJM4558L Dual OP-Amp

0 -15.2 -22.6

7.7 8.3 8.3 8.3 8.3 8.3 8.3

0 7.0 -8.0 -8.-8.2

IC35, 1214: PC4570HA-A Dual OP-Amp

C43, 44

0.01/250

4700P/250

14.8 0.6

STANDBY/ON

4 VO1 Vm1 +Vm1

8 +Vm2 Vm2 VO2

IC6, 8: LB1641 Motor Driver

VCC 2 VCC 1

0.1 7.6 14.1.4 3.0 1.0.8 0.8 1.4 1.4 0.2 0.2 -14.9

IN 1 GND

21.1 0.8 0

AC34.9

PRE DRIVER

0 -22.6

INPUT LOGIC

4.8 4.9 0

POWER TRANSFORMER J, U, C, T, K, A, B, G models

1.8 2.0 2.0 0.8

0.9 1.0 1.4 8.3 8.3 4.5 4.5 4.8 4.8

0.8 820

0.2 2.0 0.6

5.5 AC12.3 5.5 0

8.8 8.8 0.6

2.0 2.0

0.6 0.2
4.8 4.4.9 4.4.9 4.9 4.9 2.2 s36

4.8 4.9

R, L models
0.8 1.9 1.4 1.0.8 6.5 6.5 6.5

0 4.9 4.9

4.6 0.1 0.0 0.6 0
IC9, 10: TC4052BP Dual 4 Channel Analog Multiplexers/Demultiplexers

INHIBIT

PC4570HA-A

A B VSS VEE X0

LEVEL CONVERTER
BINARY TO 1-OF-4 DECODER WITH INHIBIT

NJM78L05A-T3

NJM78M15FA

NJM79M15FA

NJM4558L

LB1641

TC4052BP

LC651152N-4N21-E

X1 X2 X3 Y0 Y1 Y2 Y3

SW SW SW SW

1SR139 1SS133 MTZJ5.1C MTZJ8.2C MTZJ12C

RBV2506

S1NB20
2SA970 (GR, BL) 2SC2240 (GR, BL) 2SC2878 (A, B)

DTC114ES

2SC4688 (R, O)
* All voltages are measured with a 10M /V DC electronic voltmeter. * Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. * Schematic diagram is subject to change without notice.

INHIBIT 1 B X A X

0x, 0y 1x, 1y 2x, 2y 3x, 3y NONE
3: OUT 2: GND 1: IN 3: IN 2: COM 1: OUT 3: COM 2: IN 1: OUT 1

Cathode

0 101.2 63.8 101.2 58.10.3 56.6 63.8 50.5.1 5.14.8

10.3 2.2 0

50.4 -4.-4.9 63.63.8 50.4 14.0 -15.2

5.2 2.1 1.3

Page 21

To MAIN (1) W11

10.3 13.9 13.-2.0.1 -4.5.1 5.0 -4.9 5.0 5.0 -1.1 -4.9 5.0 5.10.2 10.3 10.2 2.50.4 56.6 63.7

AINP 6 VDD 7 GND 1 VSS 8

13.9 10.3
0 10.2 10.3 101.2 63.7 10.2 10.3 10.2 101.2 58.3
IC101: YDA133-EZE2 Digital Audio Power Amplifier Controller

PLLC 2 SEL 3

24 PLL CLOCK PART + Operational amplifer for integration DIGITAL MODULATION CIRCUIT

XO XI MCKIO MSSEL CKOUT

To MAIN (1) W10 J-2

-4.8 5.0 5.0 3.5 1.3

AINM 5
HIP HIN PVDD PVSS MUTEN ERRIN ICOUT

Digital modulation part

14.0 63.63.7 50.4
DETADETBDETA 11 DETB 13 POWER SUPPLY VOLTAGE DETECTION CIRCUIT
MUTE ERROR CONTROL CIRCUIT

63.7 5.1

5.0 5.0 5.0

4.9 14.8

IC102, 103: IRS20954STRPBF Power Drive
FLOATING INPUT FLOATING HIGH SIDE UV DETECT

16 CSH 15 VB

UV DETECT HIGH SIDE CS
10.4V INPUT LOGIC HV LEVEL SHIFT
5.1 1.3 0.7 0.7 -1.1 4.5.0 5.0

To MAIN (1) W12

HV LEVEL SHIFT 5V REG HV LEVEL SHIFT

12 NC 11 VCC

0.7 5.0 0

-0.1 -0.50.4

CHARGE/ DISCHARGE

UV DETECT

DEAD-TIME 20.8V

-0.1 -0.1 50.4 50.4

PROTECTION CONTROL
HV LEVEL SHIFT HV LEVEL SHIFT

LOW SIDE CS

7 OCSET 6 VREF 8 DT

5.1V REFERENCE

14.0 5.0 14.0

-0.8 -0.8 -0.8

IC109: NJM2068MD-TE2 Dual OP-Amp

OUTIN+INVCC 4

8 +VCC 7 OUTIN+IN2

NJM79L05A-T3

NJM2068MD-TE2

IRS20954STRPBF

YDA133-EZE2

1SR154-400

ISS355 RF103L2S MA111 MA8051-M

SB01-05Q

3: OUT 2: GND 1: IN

3: GND 2: IN 1: OUT

2SA1037K (Q, R, S) 2SA1514K (R, S) 2SC2412K (Q, R, S) 2SD2657K DTA114EKA DTA144EKA DTC114EKA

2SK2158-T2B-A

IRFB38N20DPBF

s REPLACEMENT PARTS LIST

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

P.C.B. MAIN

Z Z Z Z
P.C.B. MAIN & DIGITAL

Z Z Z Z Z Z Z Z

P.C.B. DIGITAL

Chip Resistors

The chip resistor is not supplied as a replacement part. * When a chip resistor is necessary, use the following part. AAX60720: CHIP RESISTOR SAMPLE BOOK

Carbon Resistors

Value 1.0 1.8 2.2 3.3 4.7 5.910 1.0 k 1.2 k 1.5 k 1.8 k 2.0 k 2.2 k 2.4 k 2.7 k 3.0 k 3.3 k 3.6 k 3.9 k 4.7 k 5.1 k 5.6 k 6.8 k 8.2 k 9.1 k 1/4W Type Part No. 1/6W Type Part No. HJHFHJHJHFHJHFHJHFHJHFHFHFHJHFHFHFHJHFHFHFHJHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHJHFHFHFHFHFHJHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHJHFHFHFHJHFHFHFHFHFHFHFHJHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFValue 10 k 11 k 12 k 13 k 15 k 18 k 22 k 24 k 27 k 30 k 33 k 36 k 39 k 47 k 51 k 56 k 62 k 68 k 82 k 91 k 100 k 110 k 120 k 150 k 180 k 220 k 270 k 300 k 330 k 390 k 470 k 560 k 680 k 820 k 1.0 M 1.2 M 1.5 M 1.8 M 2.2 M 3.3 M 3.9 M 4.7 M 1/4W Type Part No. 1/6W Type Part No. HFHFHFHFHFHJHFHFHFHFHFHFHFHFHFHFHFHJHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHFHJHFHFHFHFHFHFHFHJHFHFHFHJHFHJHFHJHFHFHJHFHJHFHJHFHJHFHJHJHFHJ35 9470

1/4W Type

1/6W Type

10mm 5mm

q OVERALL ASSY A

5-2 (5) 200 202

5-2 (2)
5-55 5-56 200-204 J model 5-2 (1) 5-54 5-J model 5-5-31 5-52 5-56 R, L models 5-54 5-57 5-55
5-52 5-2 (6) 1 5-5-54 5-1-13 5-1-5-5-1-12 5-1-15 5-2 (7) R, L models
20 5-2 (4) 3-19 3-22 3-12 3-1 3-15 3-18 3-5

1-5 3-20 3-19

5-2 (3)

3-19 14

Z Z Z Z Z Z

Z Z Z Z Z Z Z

s REMOTE CONTROL

q SCHEMATIC DIAGRAM

D1 MIE-554A2 Rohms Rohms Q1 2SC3440-T112

JP2 18

C1 47F

20 VDD

19 CARR

C2 0.1F

IC1 : M34283G2GP-W5/U1

XIN 4 X1

XOUT 5

4.00MHz

q PANEL

q KEY LAYOUT

q KEY CODE

CUSTOM CODE (HEX): 7B-84

Key No.
Key Name POWER B.A.S.S. PRESET 1 HIGH CUT UP HIGH CUT DOWN STANDBY PRESET 2 SLEEP PHASE MEMORY PRESET 3 VOLUME UP VOLUME DOWN
Data Code (HEX) 4B 49 4C 5E 42 4A 4D 44 45

B.A.S.S. PHASE

MEMORY PRESET 2

HIGH CUT VOLUME