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Alesis MMT-8 Service Manual 1.00

INDEX

Содержание MMT-8

Страница 1: ...ALESIS MMT 8 MT Service Manual P N 8 31 0018 A...

Страница 2: ...olely your responsibility and Alesis shall have no liability for any such repairs or service work All such service or repairs are performed at the sole risk of the person performing the service or rep...

Страница 3: ...DISTRIBUTOR OR AUTHORIZED REPAIR SERVICE CENTER IN THE PROVISION OF REPAIR SERVICES OR TO BE OR MAKE REPAIRS AS AN AUTHORIZED SERVICE CENTER ALL REPAIRS DONE BY ANY ENTITY OTHER THAN AN AUTHORIZED AL...

Страница 4: ...adiators or other heat producing equipment 7 Ventilation When installing the product make sure that the product has adequate ventilation Improperly ventilating the product may cause overheating which...

Страница 5: ...pacitors that begin to leak excess current after a significant amount of time 5 Cable Checks Wiggling cables can reveal intermittent failures such as loose cables or poorly soldered headers Remember t...

Страница 6: ...00 Power Supply 1 2 10 Battery Backup 1 3 00 The 8031 Micro Controller 1 3 10 Reset 1 3 20 Memory Mapped I O 2 4 00 Tape I O 2 5 00 MIDI I O 3 6 00 Keypad Decoding 3 7 00 Metronome Output 4 8 00 Upda...

Страница 7: ...although a 1 to 20mV range is more normal then a problem exists Usually it indicates a bad or simply wrong SRAM or a short somewhere along the MEM PWR line Note that for a short time Sony 58256 PM hi...

Страница 8: ...e just right For example if an MMT 8 was shut off while in record mode it s possible the 8031 was put into reset in the middle of writing a two byte pointer into memory If only one of those bytes is w...

Страница 9: ...reduce the chances of bad saves Note however that the MMT 8 does not compare the tape to the contents of memory It simply verifies that the information on the tape is valid MMT 8 data 7 Experimentatio...

Страница 10: ...Alesis MMT 8 Service Manual 1 00 4 9 00 Troubleshooting...

Страница 11: ...single part or song was loaded in or a cassette was verified 5 26 88 1 08 1 When in record on a part in loop the display will no longer remain displaying RECORDING after looping The display will still...

Страница 12: ...this feature can be used to locate directly to any beat within the current step of the song 9 Fixes bug that caused a track to stop playing if the track was shifted forward in time 1 to 48 384th note...

Страница 13: ...selected when playing an empty part 2 If an empty part is recorded for 683 beats either by recording through the entire part or rewinding with loop on to a beat before 683 and punching in without hav...

Страница 14: ...MENTS F0H SYSTEM EXCLUSIVE STATUS BYTE 00H 00H 0EH ALESIS I D NUMBER 00H MMT 8 I D NUMBER Following the above 5 bytes will be a block of data representing the contents of the MMT 8 s memory In order t...

Страница 15: ...pointer to song 00 104H MSB of absolute pointer to song 01 105H LSB of absolute pointer to song 01 106H MSB of absolute pointer to song 02 107H LSB of absolute pointer to song 02 1C8H MSB of absolute...

Страница 16: ...ata 0EH LSB of offset from start of part to address of start of track 2 data 0FH MSB of offset from start of part to address of start of track 2 data 10H LSB of offset from start of part to address of...

Страница 17: ...sb set to 1 while a 5 byte packet has the 1st byte msb set to 0 Each packet contains one of the following seven events Note event with duration controller 0 121 event program change event after touch...

Страница 18: ...b Pitch bend msb Sysex format 01111101 Sysex flag 125 1vvvvvvv sysex byte 0 127 bccccccc b 1 EOX b 0 then c sysex byte 00000000 not used deeeeeee d 1 EOX d 0 then e sysex byte A sysex message ends and...

Страница 19: ...02H Tempo of song in BPM 03H 10H 14 digit ASCII name of song 11H Step 1 part number 00 99 12H Step 1 play tracks bit 0 track 1 bit 7 track 8 0 off 1 on 13H Step 2 part number 14H Step 2 play tracks 15...

Страница 20: ...Confidential Alesis Service Manual 8 31 0018 A ALESIS MMT 8 MT SCHEMATIC AND PCB FILES...

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Страница 23: ...Confidential Alesis Service Manual 8 31 0018 A ALESIS MMT 8 MT ECN HISTORY...

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Страница 39: ...Confidential Alesis Service Manual 8 31 0018 A ALESIS MMT 8 MT BOM...

Страница 40: ...2 11 7805 1 VR1 NAT ONLY MAIN NAT IC 74HC138 DEMUX 2 14 0138 1 U5 MAIN NAT TI IC 74HC541 OCTAL BUFFER 2 14 0541 1 U3 MAIN NAT TI IC 74HC573 LATCH TRI ST 2 14 0573 1 U11 MAIN NAT TI IC 74HC574 TRI STA...

Страница 41: ...MAIN RES 1 5M 1 8W 5 0 00 0155 1 R6 MAIN RES 2K 1 8W 5 0 00 0202 1 R11 MAIN RES 220 1 8W 5 0 00 0221 21 R46 60 33 38 MAIN RES 2 2K 1 8W 5 0 00 0222 4 R26 27 30 31 MAIN RES 3 3M 1 8W 5 0 00 0335 1 R15...

Страница 42: ...Alesis MMT 8 Service Manual 16 13 00 Service Manual History 7 21 94 V1 00b Preliminary Release...

Страница 43: ...Alesis MMT 8 Service Manual 1 00 17 INDEX...

Страница 44: ...Alesis MMT 8 Service Manual 1 00 18 NOTES...

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