Alto-L8-mix-sm 电路图 维修手册.pdf

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1、Service Manual Version: 1.1 Model: L-8 (8-CHANNEL MIXING CONSOLE WITH DIGITEL EFFECTS) RadioFans.CN 收音机爱 好者资料库 CONTENTS 1. Specification 2. Block Diagram 3. Schematic Diagram 4. Printed Circuit Board 5. Wiring Diagram 6. Test Procedure 7. Electrical Parts List 8. Exploded Views & Mechanical Parts Li

2、st 9. Notes RadioFans.CN 收音机爱 好者资料库 8. TECHNICAL SPECIFICATION Mono input channels Microphone input electronically balanced, discrete input configuration Frequency response 10Hz to 55kHz, +3dB Distortion (THD & N) 0.005% at +4dBu, 1kHz Gain range 0dB to 60dB (MIC) SNR (Signal to Noise Ratio) 115dB L

3、ine input electronically balanced Frequency response 10Hz to 55kHz, +3dB Distortion (THD & N) 0.005% at +4dBu, 1kHz Sensitivity range +15dBu to45dBu Stereo input channels Line input unbalanced Frequency response10Hz to 55kHz,3dB + Distortion (THD & N) 0.005% at +4dBu, 1kHz Impedances Microphone inpu

4、t 1.4kOhm Channel Insert return 2.5kOhm All other inputs 10kOhm or greater Tape out 1kOhm All other output 120Ohm Equalization Hi shelving +15dB 12kHz Mid bell +12dB 2.5kHz Low shelving +15dB 80Hz Low Cut filter 75Hz, 18dB/oct. Main Mix Section Noise (Bus noise) Fader 0 dB, channels muted:100dBr (re

5、f.:+4dBu) Fader 0dB, all input channels assigned and set to UNITY gain:90dBr (ref.:+4dBu) Max output +22dBu balanced XLR, +22dBu unbalanced, 1/4 jacks AUX Return gain range OFF to +20dB AUX Sends max out +22dBu DSP SECTION A/D and D/A converters 24 bit DSP resolution 24 bit Type of effects Hall, Roo

6、m, Vocal & Plate REVERBS Mono & Stereo DELAY (max DELAY TIME 500ms) Chorus, Flanger & Vibrato MODULATIONS REV+DELAY, REV+CHORUS, REV+FLANGER, REV+VIBRATO combinations Presets 256 Controls 16-position PRESET BANK Selector 16-position VARIATION selector CLIP LED MUTE SWITCH with LED indicator RadioFan

7、s.CN 收音机爱 好者资料库 Power supply Main voltage USA/Canada 100120V, 60Hz Europe 210230V, 50Hz U.K./Australia 240V, 50Hz Power Consumption 25watts Fuse 100120V : T500mAL 210240V : T250mAL Main connection Standard IEC receptacle Physical Net weight 2.4Kg (5.29lb) Shipping weight 3.5Kg (7.72lb) Dimension (WD

8、H) 245mm268mm24/73mm (9.6410.540.94/2.87) 12345678 A B C D 87654321 D C B A L8MAP Sch Ttel Size Fle Date Drawn By Sheet RevisionModel No 5-Oct-2003 KEVIN LIN ALTO MIXING CONSOLE 11of L-8 BLOCK DIAGRAM VER030118 A2(C) MONO INPUT CHANNELS ( 1-4 ) 2 1 3 MIC IN +48V 3-BAND EQ 12K2.5K80 HI PASS 2 1 3 LO

9、CUT SG/OL LEFT-BUS RIGHT-BUS AUX-1 AUX-2 RIGHT-BUS LEFT-BUS AUX-1 AUX-2 STEREO INPUT CHANNELS (5-8) EQ 12K2.5K80 LEFT-BUS RIGHT-BUS AUX-1 AUX-2 LEFT-BUS RIGHT-BUS STEREO AUX RETURN 2 RIGHT-BUS LEFT-BUS AUX-1 AUX SEND AUX-2 MAIN OUT LEFT-BUS RIGHT-BUS 2 1 3 2TK TO MIX 2 1 3RIGHT-BUS LEFT-BUS TAPE IN

10、RIGHT 2-TRACK 2 1 3 2TK TO CTRL ROOM 2 1 3 PHONES OUTPUT LEFT METER RIGHT METER 75Hz +/-15db 3-BAND EQ 12K2.5K80 +/-15db 3c 5e 1a 4d 2b LEFT 3c 5e 1a 4d 2b RIGHT MAIN MIX AUX SEND1 T R S AUX SEND2 T R S MAIN MIX LEFT T R S MAIN MIX RIGHT T R S CONTROL ROOM OUTPUT LEFT T R S RIGHTT R S PHONES T R S &

11、 PHONES CONTROL ROOM LEFT TAPE OUT 2 1 3 2 1 3 LEVEL AUX RETURN2 STEREO AUX RETURN 1 3c 5e 1a 4d 2b LEFT(MONO) 3c 5e 1a 4d 2b RIGHT AUX RETURN1 - T R S RN TN T R S RN TN T R S RN TN T R S RN TN PAN PHANTOM LINE N GAIN - + POWER - - - LOMIDHI 12 12 AUX1 AUX2 LEVEL POST PRE BALANCE AUX1 AUX2 LEVEL LOM

12、IDHI SG/OL 3c 5e 1a 4d 2b LEFT(MONO) 3c 5e 1a 4d 2b RIGHT T R S RN TN T R S RN TN - - 2 1 3 MIC5 IN +48V PHANTOM GAIN - + POWER CHANNEL 5 6 ONLY 3c 5e 1a 4d 2b INSERT T R S RN TN MIC GAIN:060dB LINE IN TRIM: 15dB-45dB EFX SEND DSP BOARD PRESETS VARIATIONS MUTE DSP FOOTSWITCH EFX SEND LEFT-BUS RIGHT-

13、BUS AUX-1 AUX-2 EFX SEND AUX-1 AUX1 12345678 A B C D 87654321 D C B A L8MN1.Sch Titel Size File: Date: Drawn By: Sheet RevisionModel No: 5-Oct-2003 KEVIN LIN. INPUT STAGE 41of ALTO L-8 VER030113 A2 EQ HI 12KHZ C131 18n(M) VR2 B50K R151 6K8 VR4 B50K R150 6K8 LO R47 10K C87 47u/25V 5 6 7 U3B 4580M R22

14、0 1M C179 22P R212 1K1 VR3 B50K R137 1K3 MID R196 910R C155 12n(M) R197 910R C139 33n(M) C140 33n(M) C171 12n(M) C163 18n(M) C88 47u/25V R285 5K1 VR6 W50K AUX-1 R228 68K R248 4K7 C195 2.2u/50V R152 6K8 TR2 BR TR1 BR R264 1K5 +VCC LD1 RED R236 30K 3 2 1 U3A 4580M VR8 W50K PEAK C89 47u/25V R256 3K9 R2

15、70 36K C180 22P VR5 W50K C90 47u/25V R284 5K1 AUX-2 LEVEL AUX-POST VR7A JQ10K VR7B JQ10K R287 5K1 R286 5K1 LEFT-BUS RIGHT-BUS PAN PGND AUX-PRE 80HZ 2.5K EQ HI 12KHZ C132 18n(M) VR10 B50K R155 6K8 VR12 B50K R154 6K8 LO R55 10K C94 47u/25V 5 6 7 U6B 4580M R221 1M C181 22P R213 1K1 VR11 B50K R139 1K3 M

16、ID R198 910R C156 12n(M) R199 910R C141 33n(M) C142 33n(M) C172 12n(M) C164 18n(M) C95 47u/25V R289 5K1 VR14 W50K AUX-1 R229 68K R249 4K7 C196 2.2u/50V R156 6K8 TR4 BR TR3 BR R265 1K5 +VCC LD2 RED R237 30K 3 2 1 U6A 4580M VR16 W50K PEAK C96 47u/25V R257 3K9 R271 36K C183 22P VR13 W50K C98 47u/25V R2

17、88 5K1 AUX-2 LEVEL AUX-POST VR15A JQ10K VR15B JQ10K R291 5K1 R290 5K1 LEFT-BUS RIGHT-BUS PAN PGND AUX-PRE 80HZ 2.5K EQ HI 12KHZ C133 18n(M) VR18 B50K R159 6K8 VR20 B50K R158 6K8 LO R63 10K C101 47u/25V 5 6 7 U9B 4580M R222 1M C182 22P R214 1K1 VR19 B50K R141 1K3 MID R200 910R C157 12n(M) R201 910R C

18、143 33n(M) C144 33n(M) C173 12n(M) C165 18n(M) C103 47u/25V R293 5K1 VR22 W50K AUX-1 R230 68K R250 4K7 C197 2.2u/50V R160 6K8 TR6 BR TR5 BR R266 1K5 +VCC LD3 RED R238 30K 3 2 1 U9A 4580M VR24 W50K PEAK C97 47u/25V R258 3K9 R272 36K C184 22P VR21 W50K C106 47u/25V R292 5K1 AUX-2 LEVEL AUX-POST VR23A

19、JQ10K VR23B JQ10K R295 5K1 R294 5K1 LEFT-BUS RIGHT-BUS PAN PGND AUX-PRE 80HZ 2.5K EQ HI 12KHZ C134 18n(M) VR26 B50K R163 6K8 VR28 B50K R162 6K8 LO R71 10K C102 47u/25V 5 6 7 U12B 4580M R223 1M C185 22P R215 1K1 VR27 B50K R143 1K3 MID R202 910R C158 12n(M) R203 910R C145 33n(M) C146 33n(M) C174 12n(M

20、) C166 18n(M) C104 47u/25V R298 5K1 VR30 W50K AUX-1 R231 68K R251 4K7 C198 2.2u/50V R164 6K8 TR8 BR TR7 BR R267 1K5 +VCC LD4 RED R239 30K 3 2 1 U12A 4580M VR32 W50K PEAK C105 47u/25V R259 3K9 R273 36K C186 22P VR29 W50K C107 47u/25V R297 5K1 AUX-2 LEVEL AUX-POST VR31A JQ10K VR31B JQ10K R296 5K1 R299

21、 5K1 LEFT-BUS RIGHT-BUS PAN PGND AUX-PRE 80HZ 2.5K 84 U3C 4580M 84 U6C 4580M C205 100n C206 100n +VCC -VCC C289 100n C290 100n 84 U12C 4580M 84 U9C 4580M J2 POST (PRE) J1 POST (PRE) J3 POST (PRE) J4 POST (PRE) C295 100n C296 100n C297 100n C298 100n (SOLTON1K2)用 C319 47u/25V C318 47u/25V C320 47u/25

22、V C321 47u/25V EQ HI C135 18n(M) VR34A B50K R167 6K8 VR36A B50K R166 6K8 LO R96 10K C111 47u/25V 3 2 1 U16A 4580M R224 1M C187 22P R216 1K1 VR35A B50K R145 1K3 MID R204 910R C159 12n(M) R205 910R C147 33n(M) C148 33n(M) C175 12n(M) C167 18n(M) C112 47u/25V R312 5K1 VR38 W50K AUX-1 R232 47K R254 4K7

23、C199 2.2u/50V R170 6K8 TR10 BR TR9 BR R268 1K5 +VCC LD5 RED R244 22K 3 2 1 U17A 4580M VR40A W50K PEAK C113 47u/25V R260 3K9 R281 36K C188 22P VR37 W50K C116 47u/25V R313 5K1 AUX-2 LEVEL AUX-POST VR39A JQ10K VR39B JQ10K R311 5K1 R310 5K1 LEFT-BUS RIGHT-BUS BAL PGND AUX-PRE 80HZ 2.5K EQ HI C136 18n(M)

24、 VR34B B50K R169 6K8 VR36B B50K R168 6K8 LO R111 10K C119 47u/25V 5 6 7 U16B 4580M R225 1M C190 22P R217 1K1 VR35B B50K R146 1K3 MID R206 910R C160 12n(M) R207 910R C149 33n(M) C150 33n(M) C176 12n(M) C168 18n(M) C120 47u/25V 80HZ 2.5K R97 10K R98 10K R233 47K R245 22K 5 6 7 U17B 4580M VR40B W50K C1

25、14 47u/25V R261 3K9 R280 36K C189 22P C115 47u/25V LEVEL R100 10K R99 10K J5 POST (PRE) EQ HI 12KHZ C137 18n(M) VR41A B50K R172 6K8 VR43A B50K R171 6K8 LO R120 10K C124 47u/25V 3 2 1 U19A 4580M R226 1M C191 22P R218 1K1 VR42A B50K R147 1K3 MID R208 910R C161 12n(M) R209 910R C151 33n(M) C152 33n(M)

26、C177 12n(M) C169 18n(M) C127 47u/25V R317 5K1 VR45 W50K AUX-1 R235 47K R255 4K7 C200 2.2u/50V R173 6K8 TR12 BR TR11 BR R269 1K5 +VCC LD6 RED R246 22K 3 2 1 U20A 4580M VR47A W50K PEAK C121 47u/25V R262 3K9 R283 36K C192 22P VR44 W50K C130 47u/25V R314 5K1 AUX-2 LEVEL AUX-POST VR46A JQ10K VR46B JQ10K

27、R316 5K1 R315 5K1 LEFT-BUS RIGHT-BUS BAL PGND AUX-PRE 80HZ 2.5K EQ HI 12KHZ C138 18n(M) VR41B B50K R175 6K8 VR43B B50K R174 6K8 LO R125 10K C125 47u/25V 5 6 7 U19B 4580M R227 1M C193 22P R219 1K1 VR42B B50K R148 1K3 MID R210 910R C162 12n(M) R211 910R C153 33n(M) C154 33n(M) C178 12n(M) C170 18n(M)

28、C126 47u/25V 80HZ 2.5K R121 10K R122 10K R234 47K R247 22K 5 6 7 U20B 4580M VR47B W50K C128 47u/25V R263 3K9 R282 36K C194 22P C129 47u/25V LEVEL R124 10K R123 10K J6 POST (PRE) PCB# L8MN1.PCB RTN-CH1 RTN-CH2 RTN-CH3 RTN-CH4 PRE-CH5 PRE-CH6 PRE-CH7 PRE-CH8 84 U16C 4580M 84 U17C 4580M C217 100n C218

29、100n C219 100n C220 100n 84 U20C 4580M 84 U19C 4580M C207 100n C208 100n C201 100n C202 100n MAIN IN-OUTPUT L8MN1.S01 LED DISPLAY L8MN1.S02 L8MN1 (1/3) UDASP IN-OUT SECTION L8MN1.S03 12345678 A B C D 87654321 D C B A L8MN1.S01 Titel Size File: Date: Drawn By: Sheet RevisionModel No: 5-Oct-2003 KEVIN

30、 LIN. STEREO AUX & SENDS & MAIN OUT & 2TK & CTRL R & PHONES 32of ALTO L-8 VER030120 A2(C) C265 100P C241 47u/25V R77 8K2 R241 22K C266 100P C239 47u/25V R78 8K2 R240 22K VR48B W50K VR48A W50K 3 2 1 U21A 4580M 5 6 7 U21B 4580M 84 U23C 4580M R318 56K C223 22P C243 47u/25V R302 5K1 R320 56K C269 22P C2

31、45 47u/25V R304 5K1 5 6 7 U25B 4580M 3 2 1 U25A 4580M 84 U26C 4580M R15 5K1 C13 22P LEFT-BUS RIGHT-BUS C260 22P R306 5K1 R305 5K1 84 U21C 4580M R301 5K1 C234 47u/25V C233 47u/25V 5 6 7 U26B 4580M 3 2 1 U26A 4580M 84 U27C 4580M R277 36K C264 22P R16 3K9 C8 47u/25V VR51B W50K MAIN MIX VR51A W50K R276

32、36K C263 22P R339 3K9 C236 47u/25V C237 47u/25V C238 47u/25V R76 10K R75 10K 84 U24C 4580M C203 100n C204 100n +VCC -VCC C211 100n C212 100n C251 47u/25V R188 20K 3 2 1 U23A 4580M R189 20K C282 22P C252 47u/25V R85 10K R309 5K1 C246 47u/25V R186 20K 5 6 7 U23B 4580M R187 20K C281 22P C248 47u/25V R8

33、1 10K R308 5K1 LEFT-BUS RIGHT-BUS 2TK TO MIX R348 27K 2TK TO R349 27K 3 2 1 U27A 4580M 5 6 7 U27B 4580M VR50B W50K VR50A W50K C249 47u/25V C255 47u/25V R344 3K9 R345 3K9 R278 36K R279 36K C225 22P C226 22P C250 47u/25V C256 47u/25V R82 10K R86 10K 84 U25C 4580M AUX RETURN 1 R-METER EFX TO AUX1 R184

34、20K C231 47u/25V 3 2 1 U24A 4580M R275 36K C222 22P L-METER AUX-1 R185 20K C232 47u/25V 5 6 7 U24B 4580M R274 36K C221 22P AUX-2 C271 100P C272 100P MAIN MIX ROOM LEFT-BUS RIGHT-BUS LEFT RIGHT R73 39K R74 39K CONTROL PHONES/ CTRL ROOM C14 100P C19 47u/25V R7 10K C20 100P C5 47u/25V R8 10K VR49B W50K

35、 VR49A W50K 3 2 1 U1A 4580M 5 6 7 U1B 4580M R319 36K C224 22P C244 47u/25V R27 10K R321 36K C270 22P C247 47u/25V AUX RETURN 2 C22 22P C45 47u/25V R39 5K1 R72 10K R38 5K1 5 6 7 U31B 4580M C24 22P C286 47u/25V R375 5K1 R41 51K R93 5K1 1 2 3 4 5 6 7 8 CN0 2.5-8P PGND +VCC-VCCPH PWR C305 100n C306 100n

36、 C307 100n C308 100n C309 100n C310 100n C311 100n C312 100n MAIN-L-2 MAIN-R-2 LEFT-BUS RIGHT-BUS AUX-1 AUX-2AUX-SEND1 AUX-SEND2 AUX-RTN1-L AUX-RTN1-R AUX-RTN2-L AUX-RTN2-R 2TK- N-L 2TK- N-R 2TK TO CR-R 2TK TO CR-L SW9A PS-22E85L SW9B PS-22E85L RIGHT-BUS LEFT-BUS MAIN-L-3 MAIN-R-3 SW10B PS-22E85L MA

37、IN-R-2 2TK TO CR-R 2TK TO CR-L MAIN-L-2 SW10A PS-22E85L CTRL-R-L CTRL-R-R CTRL-R-L CTRL-R-R 1 2 3 4 5 6 7 8 9 10 11 12 CN3 2.5-12P-B24 (TO L8MN1) RTN-CH1 RTN-CH2 RTN-CH3 RTN-CH4 PRE-CH5 PRE-CH6 PRE-CH7 PRE-CH8 1 2 3 4 5 6 7 8 9 10 11 12 CN4 2.5-12P-B24 (TO L8MN1) MAIN-R-2 MAIN-R-3 MAIN-L-2 MAIN-L-3

38、+VCC -VCC 1 2 3 4 5 6 7 8 CN5 2.5-8P-B24A (TO L8MN1) AUX-RTN1-L AUX-SEND1 AUX-RTN1-R AUX-SEND2 AUX-RTN2-L CTRL-R-L AUX-RTN2-R CTRL-R-R 2TK-IN-L 2TK-IN-R PH PWR FOOTSW +VCC -VCC EFXRTN-L EFXRTN-R AUX-SEND2 AUX-SEND1 MAIN-L-2 MAIN-L-3 MAIN-R-2 MAIN-R-3 2TK-IN-L 2TK-IN-R +5VD L8MN1 (2/4) DGND 3 2 1 U31

39、A 4580M 3 2 1 U2A 4580M C6 47u/25V C7 47u/25V 5 6 7 U2B 4580M R10 10K C12 22P R9 10K C11 22P R11 10K R12 5K1 R13 27K R14 27K R26 3K9 C10 47u/25V R25 3K9 C9 47u/25V AUX-1 84 U1C 4580M 84 U2C 4580M C15 100n C16 100n C17 100n C18 100n VR9 W50K (AUX RETURN2) 84 U31C 4580M C340 100n C341 100n 1234 A B C

40、D 4321 D C B A L8MN1.S02 Titel Size File: Date: Drawn By: Sheet RevisionModel No: 5-Oct-2003 KEVN LN. DISPLAY STAGE 43of ALTO L-8 VER030120 A4 8 9 14 U35C LM339 1 6 7 U35B LM339 1 6 7 U38B LM339 8 9 14 U38C LM339 8 9 14 U36C LM339 1 6 7 U36B LM339 1 6 7 U39B LM339 8 9 14 U39C LM339 LD10 GR LD11 GR L

41、D12 GR LD13 GR LD14 GR LD15 GR LD16 GR LD17 GR R350 120R R355 120R R356 470R R359 330R R357 470R R360 330R R358 470R R361 510R R362 620R +VCC R354 56R -VCC PGND 10 11 13 U35D LM339 5 4 2 U35A LM339 5 4 2 U38A LM339 10 11 13 U38D LM339 10 11 13 U36D LM339 5 4 2 U36A LM339 5 4 2 U39A LM339 10 11 13 U3

42、9D LM339 LD22 GR LD23 GR LD24 GR LD25 GR LD26 GR LD27 GR LD28 GR LD29 GR -VCC LEFT METER (-30)(-20)(-10)(-7)(-4)(-2)(0)(+2) 3 2 1 U30A 4580M R367 100K R371 0R0 R369 100K C283 47u/25V PGND 10 11 13 U37D LM339 5 4 2 U37A LM339 5 4 2 U40A LM339 10 11 13 U40D LM339 LD30 GR LD31 GR LD32 YEL LD33 RED 8 9

43、14 U37C LM339 1 6 7 U37B LM339 1 6 7 U40B LM339 8 9 14 U40C LM339 LD18 GR LD19 GR LD20 YEL LD21 RED R363 1K3 R364 2K R365 5K6 R366 27K TR13 HR +VCC D1A DA204K D1B DA204K TR14 HR R353 120R R351 470R R352 470R R87 10K PGND 5 6 7 U30B 4580M R368 100K R372 0R0 R370 100K C284 47u/25V PGND L-METER R-METER

44、 312 U36E LM339 312 U37E LM339 312 U35E LM339 312 U38E LM339 312 U39E LM339 84 U30C 4580M C213 100n C214 100n R373 47R R374 47R C257 47u/25V C258 47u/25V +VCC -VCC PGND LD8 RED LD7 GR R253 4K7 R252 2K PGND PGND PH PWR 31 D3A DA204K D3B DA204K 31 D2A DA204K D2B DA204K (+4)(+7)(+10)(+18) PWR ON PHANTO

45、M +VCC 312 U40E LM339 R428 10K R427 10K PGNDPGND L8MN1 (3/4) C342 47P C343 47P 12345678 A B C D 87654321 D C B A L8MN1.S03 Titel Size File: Date: Drawn By: Sheet RevisionModel No: 5-Oct-2003 KEVIN LIN. UDASP IN/OUT SECTION 44of ALTO L-8 VER030217 A2(C) C39 22P C61 1.5nF 2.5% C50 4.7uF 5 6 7 U44B 458

46、0M R24 10K R68 68R R17 3K3R19 10K R22 10K 3 2 1 U44A 4580M R1 10K C40 22P C62 1.5nF 2.5% C52 4.7uF 5 6 7 U45B 4580M R46 10K R6 68R R18 3K3 R20 10K R23 10K 3 2 1 U45A 4580M R48 10K 3 5 7 RL1B RY-5W-K 4 6 8 RL1C RY-5W-K EFXRTN-L EFXRTN-R C59 4.7uF 5 6 7 U46B 4580M 3 2 1 U46A 4580M C60 1.5nF 2.5% R21 10K R2 10K C49 22P R56 10K C38 22P R54 2K2 R53 10K EFXRTN-L EFXRTN-R AUX-SEND2 (MUTE) (MUTE) 12 34 56 78 910 1112 1314 1516 CN6 HEADER 8X2 1 2 3 4 COM EN2 SDB161PVB15FS 1 2 3 4 COM EN1 SDB161PVB15FS 12 34 56 78 AR1 680R*4 12 34 56 78 AR2 680R*4 DGNDDGND +5VD DGND +5V