Akai Alesis LD32 User manual

SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Audio Outputs: 1 TRS ¼” (aux)
2 TS ¼” (main)
1 TRS ¼” (phones)
Pads: 12 velocity sensitive (w/Dynamic Articulation™)
Sample/DAC Bit
Resolution 16 / 24
Sounds: 700+
Sounds Accessible via
Pads 12
Sounds Accessible via
MIDI 120
Polyphony 32 voice
Panning 7-position user programmable
Velocity Response 8 loudness levels via pads, 127 via MIDI
Timing Resolution 96 ppq
Time Signature Range 1-128 beats per pattern
Tempo Range 30-300 BPM
Notes/Patterns/Songs
150,000 / 200 (100 user, 100 preset) / 100
Kits 100 user, 100 preset
MIDI Prog Change
Response Kit
Sync MIDI Clock with Song Position Pointer
Footswitch
Jacks/Functions Start / Stop
Count / A / B / Fill
Microphone Input TS 1/4”
Other Features Step Editing, Stereo Samples, Reverb and Compressor / EQ effects.
Power 12 VAC External Transformer, UL and CSA Approved
6 AA batteries (not included)
SERVICE MANUAL
MODEL: ACD1

Diagnostic Specification
For
XR-20 and Alesis LD32
Product Code: ACD1/LD32
Document Version 0.90
Last Revised: 2008/01/01

1. Memory Test
Upon startup, holding down [PLAY] should run the memory test from boot code. The
screen will indicate whether the test was successful or a failure. After this test, power
down the unit to enter diagnostics mode.
RAM Test
Wait..
And once the test is complete:
RAM Test
Passed
Or RAM Test
Failed
2. Entering Diagnostics Mode
Upon startup, holding down [1] and [3] should enter diagnostic mode. A restart is
required to exit diagnostic mode.
After start-up is complete the LCD should display the first test. On the test selection
page, these buttons are active.
[PAGE >] Advance to next test.
[< PAGE] Advance to the previous test
[PLAY] Execute Test.
Once within a test, the [STOP] button will exit the test to return to the test selection page.
3. Test 1: LCD Test
The LCD should show display the following:
Diags
LCD
When the test is executed, all pixels will be turned on.
4. Test 2: LED Test
The LCD should show display the following:

Diags
LED
When the test is executed, the LCD should show:
LED
All On
All LEDs shall turn on.
5. Test 3: Switch Test
The LCD should show display the following:
Diags
Switch
When the test is executed, the LCD should show:
SWITCH
The user will then press the switches one at a time. When each switch is pressed, its
name shall appear on the second line:
Drum
1Shot (“Perc” for LD32)
Synth (“Bass” for LD32)
DrmSet
Effect
StpEdt
Preset
PatSng
PatPly
NotRep (“Roll” for LD32)
TapTem
A
B
Fill
Mute
Stop
Play
Rec
Dec
Inc
<Page
Page>

1
2
3
4
5
6
7
8
9
0
RecSet
SysSet
Copy
Erase
Once all switches are pressed the LCD will display:
SWITCH
Passed
Pressing [STOP] will then bring the user to the test select page. Pressing [STOP] twice
in a row during the test will abort the test, and the LCD will display:
SWITCH
Abort
Pressing [STOP] will then bring the user to the test select page. If during the test more
than one switch is detected, the LCD should display:
SWITCH
Failed
6. Test 4: Pad Test
The LCD should show display the following:
Diags
Pads
When the test is executed, the LCD should show:
PADS

The user will then press the pads one at a time. When each pad is pressed, its number
and the input velocity shall appear on the second line, such as:
PADS
16v127
or PADS
1 v001
Once all pads are pressed the LCD will display:
PADS
Passed
Pressing [STOP] will then bring the user to the test select page. Pressing [STOP] during
the test will abort the test, and the LCD will display:
PADS
Abort
Pressing [STOP] will then bring the user to the test select page. If during the test more
than one pad is detected, the LCD should display:
PADS
Failed
7. Test 5: Footswitch Test
The LCD should show display the following:
Diags
Footsw
When the test is executed, the LCD should show:
FOOTSW
The user will then press the footswitches one at a time. When each pad is pressed, its
name shall appear on the second line, such as:
FOOTSW
Start
or FOOTSW
Count

Once all footswitches are pressed the LCD will display:
FOOTSW
Passed
Pressing [STOP] will then bring the user to the test select page. Pressing [STOP] during
the test will abort the test, and the LCD will display:
FOOTSW
Abort
Pressing [STOP] will then bring the user to the test select page. If during the test more
than one footswitch is detected at a time, the LCD should display:
FOOTSW
Failed
8. Test 6: Jog Test
The LCD should show display the following:
Diag
Jog
When the test is executed, the LCD should show:
JOG
0
As the user turns the jog wheel, the value should update on the display by increasing or
decreasing the current value. The second line should show the current integer value in
signed format.
9. Test 7: Audio Out Test
The LCD should show display the following:
Diags
Audio
When the test is executed, the LCD should show:
AUDIO
All

In this test the unit should generate a 300 Hz tone and output on all the outputs.
If [PAGE >] or [<PAGE] is pressed then the display should cycle through the following
outputs in incrementing or decrementing order based on the button (PAGE> is increase
and <PAGE will decrease).
All
MainL
MainR
AuxL
AuxR
Pressing [STOP] will stop the test and jump back to the diagnostic menu.
10. Test 8: MIDI Test
The LCD should show display the following:
Diags
MIDI
Before executing the test, a MIDI cable should be connected from the MIDI Out to the
MIDI In. When the test is executed, 16 different MIDI messages should be sent out the
MIDI output. The same MIDI input messages should be detected. If all the input
messages are the same as was sent, then the LCD should display “Passed”, otherwise the
LCD should show “Failed”.
MIDI
Passed
Or MIDI
Failed
11. Test 9: Flash Test
The LCD should show display the following:
Diags
Flash
Upon the user pressing [PLAY] the system will write/read a small reserved section of the
Flash and verify the results:

FLASH
Passed
Or FLASH
Failed
12. Test 10: Serial EEPROM Test
The LCD should show display the following:
Diags
EEPROM
Upon the user pressing [PLAY] the system will write/read a small reserved section of the
EEPROM and verify the results:
EEPROM
Passed
Or EEPROM
Failed
13. Test 11: Board ID Test
The LCD should display the following:
Diags
Board
Upon the user pressing [PLAY] the system will test that the front panel PCB and main
PCB are both stuffed for the same product
BOARD
Passed
Or BOARD
Failed

Audio Spec Test
This procedure verifies the audio specifications for mass production.