Alesis CD Twin User manual

ALESIS
CD-TWIN (CC0)
Service Manual
P/N: 8-31-0142-A
ATTENTION!
THIS DOCUMENT CONTAINS SENSITIVE
PROPRIETARY INFORMATION. ALL
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duplication of this document is strictly prohibited. If you are not authorized, please
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Copyright © 2004 Alesis, LLC
Confidential Alesis Service Manual 8-31-0142-A

Confidential Alesis Service Manual 8-31-0142-A
Preface
This document is intended to assist the service technician in the operation, maintenance
and repair of the Alesis device. Together with the User Reference Manual, this
document provides a complete description of the functionality and serviceability of the
Device. Any comments or suggestions you may have pertaining to the document are
welcome and encouraged.
READ THIS!
In addition to any purchase price that Alesis may charge as consideration for Alesis selling or otherwise
transferring this service manual (“Manual”) to you, if you are not a service and repair facility (“Service
Center”) authorized by Alesis in writing to be an authorized Service Center, Alesis sells or transfers the
Manual to you on the following terms and conditions:
Only Service Centers authorized by Alesis in writing are authorized to perform service and repairs covered
by an Alesis warranty (if any), and transfer of the Manual to you does not authorize you to be an authorized
Service Center. Therefore, if you perform, or if the Manual is used to perform, any service or repairs
on any Alesis product or part thereof, any and all warranties of Alesis as to that product and any
service contract with Alesis for that product shall be voided and shall no longer apply for such
product, even if your services or repairs were done in accordance with the Manual.
All service or repairs done by you or with reference to the Manual shall be solely 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 repairs. You agree that all such
work will be performed in a competent, professional and safe manner at all times and to indemnify and
fully hold Alesis and its successors and assigns harmless in the event of any failure to so perform.
Your purchase of the Manual shall be for your own ultimate use and shall not be for purposes of resale or
other transfer.
As the owner of the copyright to the Manual, Alesis does not give you the right to copy the Manual, and
you agree not to copy the Manual without the written authorization of Alesis. Alesis has no obligation to
provide to you any correction of, or supplement to, the Manual, or any new or superseding version thereof.
Alesis shall have the right to refuse to sell or otherwise transfer repair parts or materials to you in its sole
discretion. You shall not use, sell or otherwise transfer spare or replacement parts supplied by Alesis to
you (i) to repair or be used in products manufactured for or by third parties or (ii) to any third parties for
any purpose.
You shall not make any warranties or guarantees with respect to the products of Alesis or the use thereof on
behalf of Alesis or in your own name.
The foregoing describes the entire understanding related to sale or transfer of the Manual to you, and no
other terms shall apply unless in a writing signed by an authorized representative of Alesis.
All Trademarks are property of their respective companies.

Warnings
TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE, DO NOT EXPOSE
THIS PRODUCT TO WATER OR MOISTURE.
The arrowhead symbol on a lightning flash inside a triangle is intended to
alert the user to the presence of un-insulated "dangerous voltage" within the
enclosed product which may be of sufficient magnitude to constitute a risk
of electric shock to persons.
The exclamation point inside a triangle is intended to alert the user to the
presence of important operating, maintenance and servicing instructions in
the literature which accompanies the product.
REPAIR BY ANY PERSON OR ENTITY OTHER THAN AN AUTHORIZED
ALESIS SERVICE CENTER WILL VOID THE ALESIS WARRANTY.
PROVISION OF THIS MANUAL DOES NOT AUTHORIZE THE RECIPIENT
TO COMPETE WITH ANY ALESIS 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
ALESIS SERVICE CENTER SHALL BE SOLELY THE RESPONSIBILITY OF
THAT ENTITY, AND ALESIS SHALL HAVE NO LIABILITY TO THAT
ENTITY OR TO ANY OTHER PARTY FOR ANY REPAIRS BY THAT ENTITY.
Regarding the Power Supply Fuse
CAUTION: The product under service may employ the use of a
replaceable fuse. Danger of fire or electrocution if fuse is incorrectly
replaced. Replace with only the same type or equivalent type
recommended by the equipment manufacturer.
Regarding the Internal Battery
CAUTION: The product under service may employ the use of a
internal battery. Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the
manufacturer. Dispose of used batteries according to the
manufacturer's instruction.
Confidential Alesis Service Manual 8-31-0142-A

Confidential Alesis Service Manual 8-31-0142-A
Safety Instructions
Carefully read the applicable items of the operating instructions and these safety
suggestions before using this product. Use extra care to follow the warnings written on
the product itself and in the operating instructions. Keep the operating instructions and
safety suggestions for reference in the future.
1. UPower SourceU. The product should only be connected to a power supply which is described either in
the operating instructions or in markings on the product.
2. UPower Cord ProtectionU. AC power supply cords should be placed such that no one is likely to step on
the cords and such that nothing will be placed on or against them.
3. UPeriods of Non-useU. If the product is not used for any significant period of time, the product's AC
power supply cord should be unplugged from the AC outlet.
4. UForeign Objects and LiquidsU. Take care not to allow liquids to spill or objects to fall into any openings
of the product.
5. UWater or MoistureU. The product should not be used near any water or in moisture.
6. UHeatU. Do not place the product near heat sources such as stoves, heat registers, radiators or other heat
producing equipment.
7. UVentilationU. When installing the product, make sure that the product has adequate ventilation.
Improperly ventilating the product may cause overheating, which may damage the product.
8. UMountingU. The product should only be used with a rack which the manufacturer recommends. The
combination of the product and rack should be moved carefully. Quick movements, excessive force or
uneven surfaces may overturn the combination which may damage the product and rack combination.
9. UCleaningU. The product should only be cleaned as the manufacturer recommends.
10. UServiceU. The user should only attempt the limited service or upkeep specifically described in the
operating instructions for the user. For any other service required, the product should be taken to an
authorized service center as described in the operating instructions.
11. UDamage to the ProductU. Qualified service personnel should service the unit in certain situations
including without limitation when:
a. Liquid has spilled or objects have fallen into the product,
b. The product is exposed to water or excessive moisture,
c. The AC power supply plug or cord is damaged,
d. The product shows an inappropriate change in performance or does not operate normally, or
e. The enclosure of the product has been damaged.

1
Service Manual
High-Speed CD DUPLICATOR
Alesis CD TWIN
Version:1.00
Specification
Support Disc Format
Blank Disc Type
Copy Function
Connection Interface
Audio Output
Power Supply
Front control panel
Dimension
Weight
All the Audio CD, Data CD, VCD, CD-I, Photo-CD
CD-R,CD-RW
CD to CD, Edit Personal Audio CD
USB2.0 connect to PC as external CD-RW
Earphone Jack (44.1KHz, 16bit Stereo),
Line out (44.1KHz, 16 bits Stereo)
100V~240V, 50/60 Hz, AC input
2x16 LCD display, 4 control key (START, Cancel, >>, <<)
286(mm) x 226(mm) x 62(mm)
1760 g
Specifications shown are reference
only. Design andSpecifications
subject to change without notice.

2
Table of Contents
Specification .....................................................................................................1
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

3
1. Electrical Adjustment
1.1 Master Controller Component
1.Micro Controller (MPU) SIN-0002A
2.CMOS Flash Memory(128Kx8bits)39SF010-70
3.Cache Buffer RAM (256Kx16bits) GLT44016-28J4
4.Complex Programmable Logic Device 2310700002
5.USB 2.0 to ATA/ATAPI Bridge CY7C68300
6.SERIAL EEPROM 24LC02N
7.10-BIT EFT BUS SWITCH 74CBT3384A
8.POWER REGION 17805-5V andAPL1117-3.3V
1U3
Micro Controller (MPU)
SIN-0002A
2U2
CMOS Flash Memory (128K x
8bits) 39SF010-70
3U1
Cache Buffer RAM (256K x 16bits)
GLT44016-28J4
4U7
Complex Programmable Logic
Device 2310700003
5U2
USB 2.0 to ATA/ATAPI Bridge
CY7C68300A
6U5
Serial EEPROM
24LC02N
7U9 & U10
10-BIT EFT BUS SWITCH
74CBT3384A
8U8 & U11
Power Regulator IC
ROHM 17805-5V
APL1117-3.3V

4
1.2 Circuit Statement
1.2.1 Micro Controller (MPU)
Component:SIN-0002A PQFP
SIN-0002 is part of X86 serial MPU. In duplicator of function is conscientious for
circuit controller. Major of control are include IDE decoder interface command to control
CD-ROM and CD-RW read or write, LCD display string control, choice function key and
execute copy function, USB mode for external CD-RW exchange control…etc.
1.2.2 CMOS Flash Memory128K x 8bits (BIOS)
Component:SST39SF010-70
SST 39SF010 is part of CMOS flash memoryserial for 1MB capacity. Major of
function is storage duplicator source core and in general name is BIOS. The inside of
storage are include IDE decoder interface command to control CD-ROM and CD-RW
read or write, LCD display string control, choice function key and execute copy function,
USB mode for external CD-RW exchange control programs. The BIOS govern is
depend on firmware version to conform checksum.
1.2.3 Memory Buffer (256K x 16 bits DRAM IC)
Component:M11B416256A-25J SOJ-40 (Elite MT)
GLT44016-28J4 SOJ-40 (G-LINK)
IS41C16256-25K SOJ-40 (ICSI)
The memory buffer with 4MB DRAM has includes M11B416256A-25J,
GLT44016-28J4 and IS41C16256-25K for brand of name. When duplicator is finish
system boot then firmware will download to memory buffer. After system in main
function that will execute any command from memory buffer.
1.2.4 Complex Programmable Logic Device
Component:2310700003 TQFP100
The Complex Programmable Logic Device is support 64 I/O ports. Main of provides
for LCD control signal (LCD_DB0~LCD_DB7) for multiplexed BUS (AD0~AD7) to latch
output. The LCD_EN signal to decision data latch output and display character string to
LCD. The AD0~AD15 for multiplexed data and address bus exchange that cause DIR
signal to decision receive or transmission data. For CD-ROM device signal control that
includes B_CS17X, B_DREQ0, B_DACK0, B_RD0, B_WR0 ...etc. For CD-RW device
signal control that includes B_CS1FX, B_DREQ1, B_DACK1, B_RD1, B_WR1…etc.
1.2.5 USB 2.0 to ATA/ATAPI Bridge
Component:CY7C68300A
The CY7C63800A is provided ATA/ATAPI interface exchange to USB2.0 function. If
U_BUS_PWR_IN is “Low”that mean USB cable is not plug to connector. The system
will be duplicator mode. When U_BUS_PWR_IN is “High”that mean USB cable is plug
to connector. Then U_ATA_EN will from “Low”to “High”and allow ATA bus sharing with
CD-RW device. The system will exchange to external CD-RW USB mode.
1.2.6 Serial EEPROM
Component:24LC02N
Major of function is provides storage of Cypress CY7C63800A USB ID program.
The serial EEPROM capacity is 2Kbytes. Utilize SCL and SDA signals for two-way BUS
to transmission data.

5
1.2.7 10-BIT EFT BUS SWITCH
Component:74CBT3384A
Major of function is multiplexed address and data bus exchange for CD-BACKUP
mode or USB mode for CD-RW device. When U_ATA_EN is “Low”that bus switch will
exchange CD-RW device for CD-BACKUP multiplexed bus. When U_ATA_EN is “High”
that bus switch will exchange CD-RW device for USB multiplexed bus.
1.2.8 POWER REGION
Component:APL1117-33VC-TR (SOT-223)
BA17805FP (SOT-252)
Major of power supply is +5V but some of IC is necessary +3.3V for system.
Therefore design APL1117-33VC-TR regulator circuit to step-down for +3.3V. Presently
to use +3.3V that include U2, U3 and U7 component. Additional BA17805FP regulator
circuit is provide stable +5V for LCD component.

6
1.3 Component Package
U3
SIN-0002A
U2
39SF010-70

7
U1
GLT44016-28J4
U7
2310700003

8
U2
CY7C68300A
U5
24LC02N
U9 & U10
74CBT3384A

9
U8
APL1117-3.3V
U11
BA17805-5V
Q3 & Q5
2SB1427
Q6 & Q7
2SD1898
Q2 & Q4
2N3904
Q1
2N3906

10
1.4 Question Analyze
1.4.1 Before check of power on
PCBA Before
check of power on
Visual check all of PCBA
component and solder contact
check solder contact
short or lack and component
hollow or wrong
Fixed question:
solder contact: short / lack
component: hollow / wrong
YES
use surveying instrument to
measure power and gnd
open / short
NO
Relate Power have
open or short
Fixed question:
check Power relate circuit
block
YES
step 2
a). CD-BACKUP Mode Analyze
b). USB Mode Analyze
NO

11
1.4.2 CD-BACKUP mode Analyze
Step 2
Power on
use surveying
instruments to check
voltage
measure voltage
whether correct fixed question:
check power circuit
NO
use oscilloscope to
measure X1whether
correct shock
YES
fixed question:
check crystal circuit
NO
LCD Display whether
correct
fixed question:
check LCD / MPU /
CPLD...ect circuit
NO
YES
fixed question:
check MPU relate circuit
System Boot
whether correct
YES
NO
System Check
whether correct
fixed question:
check IDE device relate
circuit
YES
NO
Finish repair

12
1.4.3 USB mode Analyze
Step 2
Power ON
use surverung
instruments to check
voltage
measure voltage
whether correct fixed question:
check power circuit
NO
use oscilloscope to
measure X2 whether correct
shock
YES
fixed question:
check crystal circuit
NO
LCD Display
whether correct
fixed question:
check LCD / MPU/
CPLD...ect circuit
NO
YES
fixed question:
check USB relate circuit
USB Mode
whether correct
YES
NO
YES
finish repair

13
1.4.4 Common repair question
Item
Question appearance Repair contents or exchange component
1
LCD display abnormal 1. IC Socket (U4) is bad component.
2. U1 DRAM solder contact bad or bad component
3. CD-ROM GND spring malposition (solder contact +5V and GND)
4. X1 crystal is bad component
5. U3 MPU solder contact bad or bad component
6. U8 regulator is bad component (+3.3V output voltage isn’t correct)
7. C1solder short
8. Q1solder short
9. C8 is bad component
10. R68 or R73 is lack component
11. U4.2 and U4.3 is solder short
2
No Power 1. L2 is lack component
2. Power PCB’A for voltage is short
3. Power PCB’A to master controller connect line isn’t plug
4. C3 is solder short
5. JP1 for power connector isn’t plug
6. R107 and R108 is solder contact bad
7. R54 and R59 is solder contact bad
8. U11 regulator is bad component
9. Power switch is bad component
10. Power PCB’A is bad component
3
Sound
output or voice
abnormal 1. VR1 is bad component
2. C42 is solder contact bad
3. JP11 connector isn’t plug
4. CD-RW no music: audio cable isn’t plug
5. CD-RW no music: audio cable isn’t touch
6. Audio cable is bad component
7. JP11 connector is solder contact bad
8. JP3 connector is solder contact bad
4
CD-RW device abnormal
1. IDE cable isn’t plug
2. IDE cable is bad component
3. CD-RW is bad component
5
CD-OM device abnormal
1. IDE cable isn’t plug
2. IDE cable is bad component
3. CD-RW is bad component
6
CD-ROM or CD-RW for
eject abnormal 1. JP9 connector isn’t plug
2. Solenoid is bad component or solder contact bad
3. Micro switch is bad component
4. CD-ROM eject: SW5 solder contact bad
5. CD-RW eject: SW6 solder contact bad
7
USB mode abnormal 1. USB cable is bad component
2. CN1 connector isn’t plug
3. Repeat download USB ID program
4. U2 (CY7C68300) is bad component
5. CN1 connector solder contact bad
6. L4 or L8 solder contact bad
7. X2 crystal is bad component
8. R89 solder contact bad
9. R39 or R48 solder contact bad
8
Function key abnormal 1. OK key abnormal:OK key bad component or solder contact bad
2. “R”key abnormal:“R”key bad component or solder contact bad
3. LEFT key abnormal:LEFT key bad component or solder contact bad
4. RIGHT key abnormal:
RIGHT key bad component or solder contact
bad
5. “W”key abnormal:“W”key bad component or solder contact bad
6. CANCEL key abnormal:
CANCEL key bad component or solder
contact bad

14
1.5 Operating statement
1.5.1 CD to CD BACKUP
i. Turn on the system, you will see the LCD show the function as below:
ii. Put in source disc into“R”reader CD-ROM, and put in blank disc into“W”writer
CD-RW
iii. Press START key to confirm the execution and start copying
You can see the copying status and time elapsed from the LCD screen as below:
iv. When finish copying, the“W”CD-RW will automatically eject.
v. You can put in another blank disc to continue copying. Or you can pressCANCEL
to go back to the main menu
1.5.2 COPY TRACK
This function allows you to make your personal audio CD from multiple source CDs.
i. Put source disc into“R”CD-ROM, and blank disc into“W”.
ii. Move cursor >> or << to Select 2. Copy Track function on the LCD and press
START key.
iii. Move cursor << and >> on the track you would like and press START this
track. As you press START on each track, a letter will come up above the track
number to denote that the specific track has been chosen. In the mean time, if a
speaker has been already plugged into the earphone jack, you will hear the music of
the selected track. If you would like to cancel the selection, press START again to
delete the selection. And move cursor >> to continue your next selection.
Note:If you press Cancel key, you will stop the track selection and go back to main
menu.
Note:You can change the sequence in different order by selecting the tracks
randomly.
Function
Track selected
Track number
Total disc length
Data length processed

15
iv. When you finish choosing the tracks, move cursor >> forward to the most right end
to the OK position. Press START key to start copying the selected tracks one by
one.
v. After copying all tracks from the first CD, the “R”CD-ROM will automatically eject to
wait for the next source disc
vi. You can follow the same procedure to continue your next CD track selectionand
copy process.
vii. To make a final and complete playable CD, you have to execute the step of 3. Close
Disc after you finished all editing. (Please follow 3.3 close disc’s procedure).
Note: You will not able to play this audio CD on CD player without closing the disc.
1.5.3 CLOSE DISC
i. Move >>, << cursor to function 3. Close Disc. Make sure you have put your disc into
“W”CD-RW
ii. LCD will show the total number of tracks and available free space remaining. You
may press START to confirm the execution or Cancel key to abort this function.
iii. Start closing disc
iv. After the closing disc is finished, it will return to main menu. You may continue any
other function.
Track length
Length elapsed
Move to
OK
to finish your
Total length be written (mm:ss)
Free space (mm
:
ss)
ATTENTION:
After executing [Close Disc] function, you are not allowed to add
more tracks on the disc.

16
1.5.4 MUSIC PLAYER
This function allows CD-Twin to become a Music CD Player. Plug in speakers, you can
choose the songs you like and select a play mode; you will enjoy it like a real CD Player.
i. Put an audio CD into the“R”CD-ROM, and plug in earphone or speakers to the
machine. Select 4. Music player and press START
ii. Select the target CD-ROM to play the audio CD. Press >> Key if you have placed
the Audio CD in the “W”CD-ROM, or press<< key if you have placed the CD in“R”
CD-ROM
iii. Select the songs track that you want to play
iv. Move cursor >> << and pressSTART on each track you would like to select. An
English letter will be shown above the track number.
v. After the selection is finished, move cursor to the right end to theOK position and
press START. It will show two playing modes -[once] or [repeat] for your selection.
vi. Press, “START”to execute music playing.
vii. In playing CD,all the four control buttons are defined as below.
Start :Pause/ Play
Cancel :Stop
3
:Next song
4
:Last song
Current playing track
and length elapsed
Song Tracks
Selected songs
Select play mode
Use
3
,
4
To select the target
reader
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