Table Of Contents - Alesis CD-TWIN Service Manual

..................................................................................................... 1
Specification
1. Electrical Adjustment .................................................................................. 3
1.1 Master Controller Component .................................................................................................. 3
1.2 Circuit Statement ....................................................................................................................... 4
1.2.1 Micro Controller (MPU)..............................................................................................4
1.2.2 CMOS Flash Memory 128K x 8bits (BIOS)............................................................4
1.2.3 Memory Buffer (256K x 16 bits DRAM IC) .............................................................4
1.2.4 Complex Programmable Logic Device ...................................................................4
1.2.5 USB 2.0 to ATA/ATAPI Bridge ..................................................................................4
1.2.6 Serial EEPROM..........................................................................................................4
1.2.7 10-BIT EFT BUS SWITCH........................................................................................5
1.2.8 POWER REGION.......................................................................................................5
1.3 Component Package .................................................................................................................. 6
1.4 Question Analyze .................................................................................................................... 10
1.4.1 Before check of power on.......................................................................................10
1.4.2 CD-BACKUP mode Analyze ...................................................................................11
1.4.3 USB mode Analyze ..................................................................................................12
1.4.4 Common repair question.........................................................................................13
1.5 Operating statement ................................................................................................................ 14
1.5.1 CD to CD BACKUP ..................................................................................................14
1.5.2 COPY TRACK...........................................................................................................14
1.5.3 CLOSE DISC ............................................................................................................15
1.5.4 MUSIC PLAYER .......................................................................................................16
1.6 Firmware update step .............................................................................................................. 17
1.6.1 Update file define .....................................................................................................17
1.6.2 Update step statement ............................................................................................17
1.6.2 Firmware Version Inquire ........................................................................................18
2.Charts and Diagrams................................................................................. 19
2.2 Master controller circuit.......................................................................................................... 19
2.3 Earphone Circuit ..................................................................................................................... 20
2.4 System circuit block................................................................................................................ 21
3 Mechanism Exploded Views and Parts List.............................................. 22
3.1Machine Parts List ................................................................................................................... 22
3.2 Integration Case Assy ............................................................................................................. 24
3.3 Up Case Particular Assy.......................................................................................................... 25
3.4 Key Parts of CD-RW and CD-ROM Assy.............................................................................. 26
3.5 Up Case Complete Assy.......................................................................................................... 27
4 Electrical Parts List .................................................................................... 28

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