Roland MA-20D Powered Studio Monitors Service Manual 电路图.pdf

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1、 Copyright 2003 ROLAND CORPORATION All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION. Printed in Japan (0400) (SC)17058183E0 Apr.2003MA-20D SERVICE NOTES Issued by RJA TABLE OF CONTENTS SPECIFICATIONS.2 LOCATION OF LON

2、TROLS.3 LOCATION OF CONTROLS PARTS LIST.3 PARTS LIST.4 CIRCUIT BOARD (DIGITAL).6 CIRCUIT DIAGRAM (DIGITAL) .8 CIRCUIT BOARD (MAIN) .10 CIRCUIT DIAGRAM (MAIN).12 RadioFans.CN 收音机爱 好者资料库 2 Apr.2003 SPECIFICATIONS MA-20D: DIGITAL STEREO MICRO MONITOR Rated Power Output 40 W (20 W + 20 W) Speaker Units

3、Woofer: 12 cm / 4-3/4 inch (Magnetically-Shielded) Tweeter: 4 cm / 1-5/8 inch (Magnetically-Shielded) Frequency Range 50 Hz to 22 kHz Nominal Input Level Line 1: -10 dBu Line 2: -10 dBu Input Impedance 18 k ohms Controls BASS Control Knob TREBLE Control Knob VOLUME Knob x 2 VOLUME 1 (digital input +

4、 RCA phono) VOLUME 2 (1/4 inch phone) POWER Switch Digital Input Select Switch POWER Switch Indicators Power Indicator Connectors Front: PHONES Jack (stereo 1/4 inch phone type) Rear: LINE 1 Jacks (L, R) (RCA phono type) LINE 2 Jacks (L (MONO), R) (1/4 inch phone type) L Channel Output Jack (RCA pho

5、no type) Digital Input Connector (Optical) Digital Input Connector (Coaxial) Rear: L Channel Input Jack (RCA phono type) Digital Input Section Sampling Rate: 32/44.1/48/96 kHz D/A Converter: 24 bits Enclosure 2-way Bass-reflex type (Wooden Cabinet) Power Supply AC 117 V, AC 230 V or AC 240 V Current

6、 Draw 230 mA (AC 117 V) x 2 120 mA (AC 230 V) x 2 110 mA (AC 240 V) x 2 Dimensions 170 (W) x 261 (D) x 280 (H) mm 6-3/4 (W) x 10-5/16 (D) x 11-1/16 (H) inches 170 (W) x 256 (D) x 280 (H) mm 6-3/4 (W) x 10-1/8 (D) x 11-1/16 (H) inches Weight 4.5 kg / 9 lbs 15 oz 4.2 kg / 9 lbs 5 oz Accessories Owners

7、 Manual 5-Language (#03234634) AC Cord 120V (#03345078) AC Cord 230V (#03345045) AC Cord 230VE (#03345056) AC Cord 240VA (#03345067) Speaker Cable (RCA phono type) (#03346101) Rubber Foot x8 (#03346123) *0 dBu = 0.775 V rms *In the interest of product improvement, the specifications and/or appearanc

8、e of this unit are subject to change without prior notice. RadioFans.CN 收音机爱 好者资料库 3 MA-20D LOCATION OF LONTROLS fig.panel LOCATION OF CONTROLS PARTS LIST 1 2 3 3 456789 10 10 91 2 12 11 12 11 No.PART CODEPART NAMEDESCRIPTIONQTY 1C5700002SPEAKER TWEETERFH25G 38-12 2C6500008SPEAKER BOX(INC. EDIROL BA

9、GE & PORT)2 3C2300005RCA PIN JACKRJ-108-01-0541A3 4C2300004RCA PIN JACKRJ-1060-09-0521A1 5*6.5MM JACKJY-6313-02-13012 6C6200011R-KNOB2 C22000019M/M POTENTIOMETERRK097 1220(203A)2 701340412P R-KNOBSF-A BLK/LCG2 C22000029M/M POTENTIOMETERRK097 1210(203B)2 8*6.5MM JACKJY-6359-01-0901 9C6200010R-KEYTOP2

10、 C2400002POWER SWITCHSDKLA102002 10C6200007FRONT PANEL L1 C6200008FRONT PANEL R1 11C6200001SPEAKER GRILLE RING2 12C5700001SPEAKER WOOFERF120G 112-12 RadioFans.CN 收音机爱 好者资料库 4 Apr.2003 PARTS LIST fig.part1e DB - PWB DIGITAL PCB ASSY, AB - PWB ANALOG PCB ASSY SAFETY PRECAUTIONS: The parts marked have

11、safety-related characteristics. Use only listed parts for replacement. CONSIDERATION ON PARTS ORDRING When ordering any parts listed in the parts list, please specify the following items in the order sheet. QTYPART NUMBERDESCRIPTIONMODEL NUMBER Ex.1022575241Sharp KeyC-20/50 152247017300Knob (orange)

12、DAC-15D Failure to completely fill the above items with correct number and description will result in delayed or even undelivered replacement. NOTE: The parts marked # are new. (initial parts) CASINGQTY #C6200007FRONT PANEL L 1 #C6200008FRONT PANEL R 1 #C6200010R-KEYTOP 2 #C6200011R-KNOB 4 #C6500008

13、SPEAKER BOX(INC. EDIROL BAGE & PORT) 2 #C6200001SPEAKER GRILLE RING 2 SWITCH #C2400002SDKLA10200POWER SWITCHSW12 JACK, EXT TERMINAL #C2300004RJ-1060-09-0521ARCA PIN JACKJK4 on AB1 #C2300005RJ-108-01-0541ARCA PIN JACKJK5, JK7 on AB. JK1 on DB3 PCB ASSY #03346389PWB DIGITAL PCB ASSY1 #03346378PWB ANAL

14、OG PCB ASSY1 IC F5189113TDA7298IC (POWER)IC7, IC10 on AB2 POTENTIOMETER #C2200001RK097 1220(203A)9M/M POTENTIOMETERVR2, VR4 on AB2 #C2200002RK097 1210(203B)9M/M POTENTIOMETERVR1, VR3 on AB2 SPEAKER, BUZZER #C5700001F120G 112-1SPEAKER WOOFER2 #C5700002FH25G 38-1SPEAKER TWEETER2 TRANSFORMER #C5800001T

15、F-G069 100V/50HzPOWER TRANSFORMER1 #C5800002TF-G078 117V/60HzPOWER TRANSFORMER1 #C5800003TF-G079 230V/50HzPOWER TRANSFORMER1 #C5800004TF-G080 240V/50HzPOWER TRANSFORMER1 FUSE #C26000015ST2 2A/250VFUSEF1 on AB1 #F25591245TT750 750mA/250VFUSEF2, F3 on AB2 #F25595035ST315 315mA/250VFUSEF2, F3 on AB2 PA

16、CKING #03234656PACKING CASE GIFT BOX1 #40562201GIFT BOX LABEL FRONTfor JAPANESE1 #40562212GIFT BOX LABEL REARfor JAPANESE1 ACCESSORIES (STANDARD) #03234623OWNERS MANUALJAPANESE1 #03234634OWNERS MANUAL5-LANGUAGE1 #03346212AC CORD 100V1 #03345078AC CORD 120V1 #03345045AC CORD 230V1 5 MA-20D #03345056A

17、C CORD 230VE1 #03345067AC CORD 240VA1 #03346101RCA PIN SPEAKER CABLE1 #03346123RUBBER FOOT8 40348001WARANNTY CARD(JAPAN ONLY)1 ACCESSORIES (STANDARD) 6 Apr.2003 CIRCUIT BOARD (DIGITAL) fig.pcb-digital1 View from components side 7 MA-20D fig.pcb-digital2 View from foil side 9 Apr.2003MA-20D CIRCUIT D

18、IAGRAM (DIGITAL) fig.digital-c IIS:0 IW1:1 IW0:1=24bit MSBF 512fs 24bit MSB-First Left-Justified 44kHz=DM1:1 DM0:0 48kHz=DM1:0 DM0:1 OFF=DM1:0 DM0:0 OPTICAL IN DIGITAL BOARD 3dBu 3dBu Coaxial IN FROM MAIN BOARD Gain:6.8dB CutOff:212kHz TO MAIN BOARD D A D D D D A D+5 D D D D A D A D A D D D D D D D

19、D D D D D D D D D+5 D D D DD D A A A A A AA A A +12 D+5 R33 3.3k IC3E TC74HCU04AP 1110 R13 4.7k R10 75 R17 100k R5 4.7k D6 1N4148 12 Q3 2SC1815GR 3 12 + - IC2A NJM4558L 2 3 1 R31 10k R2 75 IC4 LC89055W-RA8 1 2 3 4 5 67 8 9 10 1112 13 14 15 16 17 1819 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 3

20、6 37 38 39 40 41 42 43 44 45 46 47 48 DISEL DOUT DIN0 DIN1 DIN2 DGNDDVDD R VIN LPF AVDDAGND CKOUT BCK LRCK DATAO XSTATE DGNDDVDD XMCK XOUT XIN EMPHA AUDIO CSFLAG F0/P0/C0 F1/P1/C1 F2/P2/C2 VF/P3/C3 DVDD DGND AUTO BPSYNC ERROR DO DI CE CL XSEL MODE0 MODE1 DGND DVDD DOSEL0 DOSEL1 CKSEL0 CKSEL1 XMODE R

21、29 100k R235.1k R2675 R35 10k Q2 2SA1015GR3 21 C33 0.27ECQB C10 0.1 C21 0.001 ECQB C28 0.01ECQB IC3B TC74HCU04AP 34 IC1 PCM1728E 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2122 23 24 25 26 27 28 LRCKIN DIN BCKIN CLK0 XTI XTO DGNDVDD VCC2RAGND2R EXTR NC VOUTR AGND1VCC1 VOUTL NC EXTL AGND2LVCC

22、2L ZERORST IWO IW1 MUTE DM0 DM1 IIS D3 1N4148 12 C26 0.1ECQB R4 6.8k R41 3.3k R40 27k L1 C15 0.1ECQB C16 220p R34 10k C30 0.1 R225.1k C14 10/50 C35 0.1 C7 0.001 ECQB R9 2.2k R15 3.3k C22 0.001 ECQB R12 6.8k R42 10k IC3F TC74HCU04AP 1312 C27 0.27ECQB R208.2k C29 33p + - IC2B NJM4558L 6 5 7 C34 33p C2

23、5 0.01ECQB Q4 2SC1815GR 3 12 R2875 IC3D TC74HCU04AP 98 IC3C TC74HCU04AP 56 D7 1N4148 12 R3 4.7k C6 0.1 ECQB R32 1M JK1A RJ-1081 31-0541A 2 1 L4 R38 10k C9 10/50 C13 0.1 R39 10k L2 R8 47k R11 4.7k Q1 2SC1815GR 3 1 2 R14 4.7k R30 1M C19 0.1 ECQB D4 1N4148 12 R6 4.7k R36 10k R21 10k C2 0.1 TER1 1 23 4

24、V GO CN1 OC-0805 R-02 21 3 C23 100p C12 0.1 C3 0.1 C4 10/50 C5 0.1 R18 10k D5 1N4148 12 C11 0.1 JK1B RJ-1081 31-0541A 10 SW1A SSSF112500 1 32 SW1B SSSF112500 1020 + - IC2C NJM4558L 84 CN2 B5B-XH 1 2 3 4 5 1 2 3 4 5 IC3A TC74HCU04AP 12 IC3G TC74HCU04AP 147 C38 0.1 C17 10/50 C18 10/50 R7 100k R16 100k

25、 C1 10/50 C8 0.001 ECQB C32 0.1 C31 10/50 C37 0.1 C36 10/50 CN3 B2B-XH 1 2 1 2 X1 HC-49/U DIP 24.576MHz 12 R19 10k R37 10k C20 100p C24 L3 D+5 D+5 D+5 D+5 -12 +12 -12-12 +12 D+5 D+5 D+5 10 Apr.2003 CIRCUIT BOARD (MAIN) fig.pcb-main1 View from components side “scale=0.95” 11 MA-20D 13 Apr.2003MA-20D

26、CIRCUIT DIAGRAM (MAIN) fig.analog1-c BASS LINE2 TREBLE LINE1 TREBLE BASS INPUT R INPUT L TO TRANS FROM TRANS TO DIGITAL BOARD INPUT R INPUT L PLAY:MORE THAN -Vs+2.7 MUTE:UP TO -Vs+2.7 STANBY:UP TO -Vs+1.8 TYP:-10dBu MAX:+17.3dBu Gain:1.7dB Gain:0dB Gain:0dB Gain:20dB MAX:19dBu(20Vpp) TYP:-10dBu MAX:

27、+17.3dBu MAIN BOARD FRONT BOARD TO SPEAKER R UNIT FROM DIGITAL BOARD TO LEFT BOARD TYP:0dBu PHONES Gain: 30dB WITH NJM7805FA Gain:1.7dB 760kHz0.8Hz 5MHz 100kHz 160kHz 230kHz0.8Hz7.6Hz 0.8Hz 75Hz 34Hz760kHz F1 F2 F3 3.0mA 700kHz WITH TDA7298 Gain:+7.5dB(90Hz),+0dB(1.5kHz),+3dB(20KHz) D+5 +18V +18V -1

28、8V +12 +12 -18V D A A A D A A A A A A D A A A A D D A A A A A A A A A A A A D A A A A A A A A A A A A A A A A A A A A A A A A A A A A AA DD C410/50 R1122k R39 47k R1047k R40 22k R13 22k R22 820 VR3A 20k B 11 12 13 C1510/50 R2 4.7k VR1A 20k B 11 12 13 C3 0.001ECQB R7 6.8k R1 2.2k C11 1.0ECQB C12 0.22

29、ECQB + - IC3C NJM4558L 84 + - IC4C NJM4556AL 84 + - IC4B NJM4556AL 6 5 7 R42 22k R48 820 C25 0.001ECQB R36 6.8k C35 0.22ECQB R3547k VR3B 20k B 21 22 23 C34 1.0ECQB C2710/50 R332.2k C36 10/50 R21 1k R47 1k C233p C2433p R55 4.7 C57 0.1ECQB R46 220 C2810/50 + - IC1A NJM4558L 2 3 1 C1610/50 + - IC5B NJM

30、4558L 6 5 7 R34 220 + - IC1B NJM4558L 6 5 7 R5220 R20220 D23 1N5392 12 D15 1N4003 12 D18 1N5392 12 R51 3.9k D24 1N5392 12 D19 1N5392 12 L10 L4 L7 L2 L1 L5 L6 R32 100 R52 15K + - IC4A NJM4556AL 2 3 1 R232.2k R19 100 C3333p R451k R311k C2233p C1033p R181k C133p R41k C3810/50 FH1 HTF015 FH3 HTF015 FH4

31、HTF015 FH5 HTF015 FH6 HTF015 + - IC1C NJM4558L 84 + - IC5C NJM4558L 84 D26 RD5.1JS 12 R60 1k C70 47/50 Q1 2SC1815GR3 12 R59 100k C71 47/50 R647k + - IC2C NJM4558L 84 + - IC5A NJM4558L 2 3 1 R53 470 R152.2k C1433p C2333p R2722kR262.2k R29 4.7k R28 2.2k VR1B 20k B 21 22 23 C55 2.2/50 SW1A SDKLA10200 1

32、2 CN5 B2P3-VH 1 3 1 3 CN4 B2P3-VH 1 3 1 3 R722.2k R712.2k JK6 HJC-027A 1 2 R54 220 C50 4700p CN6 B2P3-VH 1 3 1 3 FH2 HTF015 HEAT SINK HS1 K217 H25 D251N4003 12 D171N4003 12 C58 4700p C19 68p C710/50 C3010/50 C810/50 C3110/50 HEAT SINK HS2 K117 R1622k R8 100k C510/50 C96 220p IC7 TDA7298 1 2 3 4 5 6

33、7 OUT +VS STBY/MUTE -VS IN+/MUTE IN- IN+/PLAY C97 220p R77 NIU C6 1000P C40 68p R43 22k R50 22k R49 100k R78 NIU C39 1000P VR2B 20kA 21 22 23 R79 2.2K CN1 B10B-XH 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 D21 1N4003 12 C62 0.1 C45 0.1 VR2A 20kA 11 12 13 R444.7k C63 220/35 R732.2k C51 0.1ECQB R58 3.9

34、k CN8 B2P-VH 1 2 1 2 C610.1ECQB JK2 JY-6313 02-1301 1 2 4 C56 1000P C75 0.1 + - IC2B NJM4558L 6 5 7 JK4A RJ-1060 09-0521A 12 22 11 R81 2.2k CN3 B5B-XH 1 2 3 4 5 1 2 3 4 5 C60 0.1ECQB C42 0.1 JK5A RJ-1081-01-0541A 2 1 C67 0.1ECQB C53 220/35 + - IC3B NJM4558L 6 5 7 CN9 B3P-VH 1 2 3 1 2 3 C43 0.1 D20 1

35、N4003 12 C48 0.1ECQB C52 0.1 R304.7k C49220/35 CN7 B2B-XH 1 2 1 2 C73 0.1 IC6NJM7805FA 13 2 INOUT COM IC8NJM7812FA 13 2 INOUT COM C68 0.1 JK4B RJ-1060 09-0521A 10 JK5B RJ-1081-01-0541A 10 D22 RD5.1JS 12 IC9NJM7912FA 23 1 INOUT COM R56 100k C44 0.1 + - IC2A NJM4558L 2 3 1 R742.2k C46 0.1 C69 220/35 +

36、 - IC3A NJM4558L 2 3 1 JK3JY-6359-01-090 1 2 3 4 5 6 7 8 9 C54 4.7/50 R57 22K C72 0.1 J50 C64 4700/25 C41 0.1 D16 1N4003 12 VR4A 20kA 11 12 13 C65 220/35 R82 2.2k C66 4700/25 JK1 JY-6313 02-1301 1 2 4 R174.7k C74 0.1 CN2 B10B-XH 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 VR4B 20kA 21 22 23 LED1 1224U

37、YOC/S530-A3 12 R34.7k C9 68p C29 1000P R9 22k R41 22k R76 NIU C21 10/50 C18 1000P R24 100k R75 NIU R25 22k J51 J52 C590.1ECQB R14 22k R37 100k C13 10/50 C26 100p C32 68p C17 100p R38 22k R12 22k C930.1C920.1 SW1B SDKLA10200 1020 +12 -12-12 +12 -12 +12+12 -12-12 +12 -12-12 +12+12 -12 +12 -12 RIGHT MA

38、IN BOARD 15 Apr.2003MA-20D CIRCUIT DIAGRAM (MAIN) fig.analog2-c PLAY:MORE THAN -Vs+2.7 MUTE:UP TO -Vs+2.7 STANBY:UP TO -Vs+1.8 TO SPEAKER L UNIT Gain:30dB FROM TRANS TO TRANS LEFT MAIN BOARD LEFT FRONT BOARD WITH TDA7298 75Hz 34Hz760kHz700kHz F4 F5 F6 2.6mA A A +18V_L -18V_L A A A +18V_L -18V_L A +1

39、8V_L D D D D D D A AA DD JK7BRJ-1081-01-0541A 10 SW2B SDKLA10200 1020 C81 0.1ECQB IC10 TDA7298 1 2 3 4 5 6 7 OUT +VS STBY/MUTE -VS IN+/MUTE IN- IN+/PLAY R69 100k R70 1k C85 220/35 R65 4.7 C83 0.1ECQB JK7A RJ-1081-01-0541A 2 1 C90 47/50 C76 0.1ECQB D29 RD5.1JS 12 D30 RD5.1JS 12 C78 4.7/50 R62 15K C84

40、0.1ECQB Q2 2SC1815GR3 12 C77220/35 CN13 B2P-VH 1 2 1 2 R68 3.9k C89 47/50 R63 470 C88 4700/25D31 1N5392 12 FH8 HTF015JK8 HJC-027A 1 2 FH10 HTF015 D28 1N5392 12 FH11 HTF015 FH12 HTF015 D27 1N5392 12 D32 1N5392 12 C87 4700/25 CN16 B3P-VH 1 2 3 1 2 3 FH9 HTF015 FH7 HTF015 C82 4700p CN15 B2P3-VH 1 3 1 3

41、 C86 4700p C79 2.2/50 CN10 B2P3-VH 1 3 1 3 CN14 B2P3-VH 1 3 1 3 SW2A SDKLA10200 12 CN11 B2B-XH 1 2 1 2 C80 1000P R64 220 HEAT SINK HS3 K117 CN12 B2B-XH 1 2 1 2 TER2 JH-8M3 1 23 4 R61 6.8k LED2 1224UYOC/S530-A3 12 R66 100k L13 C100 1000P C98 220p R80 2.2K R67 22K C99 220p R85 2.2k R86 NIU R83 NIU R84 2.2k R87 2.2k R88 2.2k J53 C950.1C940.1