Yamaha-SW-500-Service-Manual电路原理图.pdf

1.396K-295 Printed in Japan 02.0120020110-110000 SERVICE MANUAL PA 011610 HAMAMATSU, JAPAN CONTENTS SPECIFICATIONS. 3 PERFORMANCE GRAPH. 4 PANEL LAYOUT. 4 CIRCUIT BOARD LAYOUT. 5 DIMENSIONS. 5 WIRING. 6 BLOCK DIAGRAM. 7 DISASSEMBLY PROCEDURE. 8 IC BLOCK DIAGRAM. 11 CIRCUIT BOARDS. 11 INSPECTIONS. 14/15 OVERALL CIRCUIT DIAGRAM PARTS LIST SW500 This document is printed on chlorine free (ECF) paper with soy ink. SUBWOOFER SW500 2 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 distributors 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. IMPOR TANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and CoConnecting the Plug and CoConnecting the Plug and CoConnecting the Plug and CoConnecting the Plug and Cor r r r rd d d d d IMPORTANT.The wires in this main lead are coloured in accordance with the following code: BLUE:NEUTRAL BROWN: LIVE As the colours of the wires in the main lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The BLUE wire must be connected to the terminal that is marked with the letter N (or coloured BLACK). The BROWN wire must be connected to the terminal that is marked with the letter L (or coloured RED). Be certain that neither core is connected to the earth terminal of the three pin plug. WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed. SW500 3 SPECIFICATIONS General specifi cations Type Bass Refl ex powered subwoofer Frequency Range 40120 Hz (10 dB) Maximum Output Level 122 dB (1 m on Axis) Dimensions (W x H x D) 480 x 619 x 590 mm Weight 42.5 kg Installation pole diameter 35 mm (1.375”) Accessories Power cable 2.5 m (AC inlet type) Speaker unit Speaker Unit 38 cm cone (8) Enclosure Type: Bass Refl ex Amp. unit Maximum Output Power 500 W at 100 Hz, THD=1%, RL=8 650 W at 100 Hz, 20 ms nonclip RL=8 Input Sensitivity/Impedance +4 dB/30 k (channels A and B) Controls LEVEL Control CUTOFF FREQ. Control: 80100 Hz (Variable) PHASE Switch: (REV/NORM) POWER Switch: ON/OFF Connectors INPUT A ,B (XLR-3-31), OUTPUT THRU A, B (XLR-3-32) OUTPUT HIGH PASS A ,B (XLR-3-32): Impedance 150 Power Indicator Green LED Clip Indicator Red LED Power Requirement USA and Canada: AC 120 V, 60 Hz Europe: AC 230 V, 50 Hz Others: AC 240 V, 50 Hz Power Consumption 200 W 0 db=0.775 *V SW500 4 q POWER switch w AC IN connector e CUTOFF FREQ. control r LEVEL control t PHASE switch y INPUT jacks A and B u OUTPUT THRU jacks A and B i OUTPUT HIGH PASS jacks A and B o POWER indicator !0 CLIP indicator SUBWOOFER MODEL SW500 POWER ON / OFF SUBWOOFER CONTROL 100 CUTOFF FREQ. 80 AC IN LEVEL NORM REV PHASE POWER CLIP OUTPUT THRU OU TPUT HIGH PASS 100Hz PARALLEL A B (+4dB) INPUT (+4dB) PARALLEL 010 q w e i r y t o !0 u Rear Panel PERFORMANCE GRAPH Standard frequency response 1k10020 FREQUENCY (Hz) RESPONSE (dB) -40 -30 -20 -10 0 +10 100Hz 90Hz 80Hz Cutoff Frequency PANEL LAYOUT SW500 5 DIMENSIONS Units: mm CIRCUIT BOARD LAYOUT AMP MIX 1/4 MIX 2/4 MIX 3/4 MIX 4/4 Power TransformerSpeaker 619250 480590 SW500 6 WIRING ? ? q? w? e-1 e-2 r? t? y? u Location Connector Assembly RemarksAvailability 6P-100L 4P-60L 2P 1P 2P 6P 2P Destination MIX 1/4-CN107AMP-CN201 MIX 2/4-CN101MIX 1/4-CN102 MIX 4/4-W101A MIX 3/4-CN105 MIX 4/4-W101B MIX 4/4-JK107Rear Panel (GND) SpeakerAMP-CN203 Power TransformerAMP-CN202 Power TransformerMIX 3/4-CN106 Unit Name MIX 1/4 Circuit Board MIX 2/4 Circuit Board MIX 4/4 Circuit Board MIX 4/4 Circuit Board Cabinet Assembly Power Transformer Power Transformer AMP MIX 1/4 MIX 2/4 W101BW101BW101BW101AW101AW101A CN201 CN203 CN202 CN107 CN102 CN101 CN106 BL YE CN105 q w t MIX 3/4 MIX 4/4 u y Power Transformer e-2 r e-1 SW500 7 HPF HPF BOOST LOW CUT LOW LPFLPF SUM OUTPUT (THRU) OUTPUT (+4dB) INPUT (+4dB) INPUT (THRU) OUTPUT 100Hz 100Hz PHASE NORMAL REVERSE (80Hz to 100Hz) CUTOFF FREQ. ch A ch B SPEAKER Secondary (Woofer) LEVEL BTL MIX 2/4 MIX 1/4 AMP MIX 3/4 + - RECTIFIER RECTIFIER OUTPUT HIGH PASS 100Hz +4dB Power Transformer Primary AC IN MIX 4/4 HIGH PASS 100Hz +4dB F201F202 JK101 JK102 JK103JK103JK103 JK105 JK106JK106JK106 GND 7 513 2 1 JK104JK104JK104 IC104 (8P) IC102 (8P) 5 3 1 21 537311 3 2 CH1 CH2 W+ W- +B -B IC202IC201 +15 +15V -15 -15V T101 +B-B 57 21 1/7 2 6 7 IC103 (8P) IC103 (8P) IC105 (8P) CN101 (4P) CN102 (4P) IC105 (8P) IC106 (8P) IC107 (8P) IC108 (8P) IC109 (8P) IC109 (8P) CN107 (6P) CN201 (6P) CN202 (6P) CN203 (4P) CN106 (3P) CN105 (3P) W101B (1P) W101A (1P) FG SW101F101 IC104 (8P) IC101 (8P) 7 575 2 1 VR101 VR102 SW102 BLOCK DIAGRAM SW500 8 DISASSEMBLY PROCEDURE 1.Speaker (Woofer) (Time required: About 10 minutes) 1-1Remove the eight (8) screws marked 60. The front grille assembly can then be removed. (Fig.1) 1-2Remove the eight (8) cap screws marked C90. The speaker (woofer) can then be removed. (Fig.1) 1-3Remove the SP connector assembly (red/black) installed to the speaker (woofer). (Photo.1) Fig.1 60:Cup Head Tapping Screw-1 4.0X16 MFZN2BL (V8889600) C90: Cap Screw #10X1-1/2 BL Z (EKY01010) C90 C90 6060 Front Grille Assembly Speaker (Woofer) SP Connector Assembly (Black) Speaker (Woofer) SP Connector Assembly (Red) Photo.1 SW500 9 2.Amplifier Assembly (Time required: About 5 minutes) 2-1Remove the sixteen (16) screws marked 30. The amplifier assembly can then be removed. (Fig.2) 3.Power Transformer (Time required: About 10 minutes) 3-1Remove the amplifier assembly. (See procedure 2.) 3-2Remove the hexagonal bolt marked A. The power transformer can then be removed. (Fig.3, 4) 4.AMP Circuit Board (Time required: About 15 minutes) 4-1Remove the amplifier assembly. (See procedure 2.) 4-2Remove the five (5) screws marked A80A in right and left each. The right and left transistor holders can then be removed. (Fig.3) 4-3Remove the four (4) screws marked A90. The AMP circuit board can then be removed. (Fig.3) 5.MIX 1/4 Circuit Board (Time required: About 10 minutes) 5-1Remove the knobs marked A150 and A160 from the rear panel side. (Fig.2) 5-2Remove the amplifier assembly. (See procedure 2.) 5-3Remove the four (4) screws marked A190. The MIX 1/4 circuit board can then be removed with the four (4) PCB supports. (Fig.2, 3) 5-4Remove the four (4) PCB supports from the MIX 1/4 circuit board. (Fig.3) 6.MIX 2/4 Circuit Board (Time required: About 15 minutes) 6-1Remove the amplifier assembly. (See procedure 2.) 6-2Remove the twelve (12) screws marked A100A. The MIX 2/4 circuit board can then be removed. (Fig.2, 3) 6-3Remove the MIX 1/4 circuit board. (See procedure 5.) And then disconnect the connector (CN102) from the MIX 1/4 circuit board. 7.MIX 3/4 Circuit Board (Time required: About 10 minutes) 7-1Remove the amplifier assembly. (See procedure 2.) 7-2Remove the two (2) screws marked A100B. The MIX 3/4 circuit board and the power switch knob can then be removed. (Fig.2, 3) 8.MIX 4/4 Circuit Board (Time required: About 10 minutes) 8-1Remove the amplifier assembly. (See procedure 2.) 8-2Remove the two (2) screws marked A80B and the screw marked A130. The MIX 4/4 circuit board and the AC inlet angle bracket can then be removed. (Fig.2, 3) SW500 10 Transistor Holder PCB Support Power Transformer Spring Washer Transformer Holder Power Transformer Installation Rubber Pad S Power Transformer Rubber Pad L Cabinet Assembly Flat Washer AC Inlet Angle Bracket A90 A90 A100B A130 A A A80A A80A CN203 CN202 CN201 CN107 CN102 CN101 CN106 BL YE CN105 Yellow Wire Black Wire MIX1/4 AMP MIX2/4 MIX4/4 MIX3/4 A80A: Bind Head Tapping Screw-B3.0X12 MFZN2BL (VQ074600) A90:Bind Head ScrewSP 3.0X8 MFZN2Y (EG330290) A100B: Bonding Tapping Screw-B3.0X8 MFZN2BL (VN413300) A130:Bind Head ScrewA4.0X8 MFZN2BL (VP156800) Fig.3 Fig.2 30:Bind Head Screw 4.0X25 MFZN2BL (VB923200) A80B: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600) A100A: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300) A190:Screw 3.0X25 MFZNBL (V3289800) Amplifier Assembly Power Switch Knob Rear Panel 30 3030 30 30 A150 30 30 A190 A190 A100A A100A A80B A160 Fig.4 SW500 11 to MIX1/4-CN102 JK101, JK106: OUTPUT HIGH PASS 100Hz (+4dB) JK102, JK104: OUTPUT THRU JK103, JK105: INPUT (+4dB) AB PARALLEL PARALLEL IC BLOCK DIAGRAM AMP Circuit Board (X0155B0) .13 MIX 1/4 Circuit Board (X0368B0).12 MIX 2/4 Circuit Board (X0368B0).11 MIX 3/4 Circuit Board (X0368B0).12 MIX 4/4 Circuit Board (X0368B0).12 CIRCUIT BOARDS Note: See parts list for details of circuit board component parts. MIX 2/4 Circuit Board Component side MIX2/4: 3NA-V791620 2 M5238AP (XM085A00) Dual Operational Amplifier MIX 2/4: IC103 1 2 3 4-V 8 7 6 5 Output A+V Non-Inverting Input A -DC Voltage Supply +DC Voltage Supply Output B Inverting Input B Non-Inverting Input B Inverting Input A+- +- NJM2068L-D (XM356A00) NJM4580L (XF195A00) Dual Operational Amplifier MIX 1/4: IC106-109 MIX 2/4: IC101,102,104,105 1 A 2345678 OUT A -IN A +IN A +IN B -IN B OUT B -V+V - + B - + SW500 12 to Power Transformer POWER ON/ OFF AC IN to AMP-CN201 LEVEL to MIX 2/4-CN101 PHASE (NORM/REV) CUTOFF FREQ. POWER CLIP MIX 1/4 Circuit Board Component side MIX 3/4 Circuit Board MIX 4/4 Circuit Board Component sideComponent side MIX 1/4, 3/4, 4/4: 3NA-V791620 2 SW500 13 to MIX1/4-CN107 to Speaker (Woofer) to Power Transformer not used (Protection check) not usednot used Adjusting the idling current Adjusting the idling current AMP Circuit Board Component side 3NA-V792120 2 SW500 14 1.Measuring instruments Oscilloscope, Level meter, Noise meter (with a DIN audio filter), Distortion rate meter, Wattmeter, Noninductive load resistance 4 x 2 (power capacity: beyond 500W) 2.Preparation 1) LEVEL:MAX CUTOFF FREQ.:MIN (80Hz) PHASE SW:NORM 2) Connecting the measuring instrument: Float the ground and then connect the measuring instrument to the midpoint of the noninductive load resistance (4 x 2). 6) Output noise level Ground the INPUT A and B terminals with 600 of resistance, measure the noise level of the output terminal, and then check that the maximum noise level is 65 dBu or less. In addition, measure the noise level from OUTPUT HIGH PASS A and B with balance and check that it is 90 dBu or less. Use a DIN audio filter with the noise meter. 7) Frequency response When a 20 Hz, 30 Hz, 50 Hz, or 100 Hz (-20 dBu) signal is input into the INPUT A terminal and the 30 Hz and 20 dBu input time of the output voltage is the standard (0 dB), check that the frequency response is as shown in the following table. Measure the frequency response with the CUTOFF FREQ. at 100 Hz (MAX) and 80 Hz (MIN). INSPECTIONS Floating ground 4 1 CN203 CN203 4 4 Amplifier Measuring instrument * Disconnect the connector assembly connected with the speaker from CN203. 3.Checks and adjustments 1) Muting operation When turning the power switch on, check that the muting operation is cancelled within 3 1 seconds and that the relay turns on. In addition, check that the power indicator turns on. 2) Adjusting the idling current Adjust the VR201 and VR202 so that the voltage obtained between pins 1 and 2 of AMP PCB CN206 and CN207 is 1 0.2 mV respectively. 3) Mid-point potential When no signal is applied, check that the DC voltage of AMP PCB CN203 (VH4P) is 100 mV or less. 4) Gain/Efficiency When a 50 Hz, 0 dBu signal is input into INPUT A and B terminals with an output voltage of +28.3 1 dBu, check that the primary power consumption is 410 50 W. (Be sure to check both INPUT A and INPUT B terminals.) In addition, check that the output voltage of the OUTPUT THRU A and B terminals is 0 1 dBu. When a 1 kHz, 0 dBu signal is input into the INPUT A and B terminals, check that the output voltage of the OUTPUT HIGH PASS A and B terminals is 0.2 0.5 dBu. (Be sure to apply a 600 load with balance when performing this measurement.) 5) Total harmonic distortion rate When a 100 Hz signal is input into the INPUT A terminal and the output voltage is 32.2 dBu, check