D4 Self Test; D5 Self Test - Alesis D4 Service Manual

5.10 D4 Self Test

The self test consists of several separate routines to check different parts of the D4s circuitry. To
initiate the self test hold "MIDI" and "DRUMSET" while powering up the unit.
The tests include (in order):
√
RAM: Tests each location in memory for accuracy. The is not memory destructive.
√
ROM: Generates a checksum of all ROM locations and compares it to the correct value stored in
the ROM. The chances of this test failing to identify a true ROM failure are extremely low.
√
LEDs: Sequentially lights all LEDs beginning with the upper left corner.
√
MIDI: Tests MIDI I/O functions. (A MIDI cable MUST be connected between the D4's MIDI IN and
OUT for the test to operate correctly.)
√
Level Check Test: Tests Main and aux output levels.
√
Triggers: Test individual triggers (See D5 self test procedures for details)
√
Buttons: Tests front panel buttons.
√
DAC Adjustment: While listening to the main outs, adjust the DAC trimpot for minimum distortion.

5.20 D5 Self Test

The D5 has two self test modes which allow the running of diagnostic tests on the digital
circuitry. In Individual Test mode, one can select particular tests to run. In All Test mode, the D5 runs all
of the tests in series.
To enter Individual Test mode:
- Power up the unit while holding down the DRUMSET and GROUP buttons. Use the Value Dial to
select which test to run (each test is described below). Press STORE to execute the test. When the test
is complete, you can either select another test to run or exit Individual Test mode by simultaneously
pressing MIX and OUTPUT.
To enter All Test mode:
- Power up the unit while holding down the DRUMSET and MIDI buttons.
Individual Test Descriptions:
1. ROM Test. If the unit passes, the D5 will display "Passed ROM Test" and exit the test automatically.
If the unit fails, the D5 will display "Failed ROM Test!" and won't exit the test. In this case, the user
must press OUTPUT to exit.
2. RAM Test. If the unit passes, the D5 will display "Passed RAM test" and exit the test
automatically. If the unit fails, the D5 will display "Failed RAM test!" and won't exit the test. In this
case, the user must press OUTPUT to exit.
3. LED Test (Individual). Lights up each LED individually. The D5 automatically exits this test after all
LEDs have been lighted.
4. LCD TEST. Lights up all the LCD pixels. Press OUTPUT to exit the test.
5. Switch and Encoder Test. Checks all of the buttons and the rotary encoder. The user must press
every button and rotate the encoder in both directions in order for the test to pass. After pressing all
the buttons, the user should simultaneously press the left and right Cursor buttons. If at this point all
of the buttons have been pressed (i.e., the unit passed), then the D5 will simply exit. If instead not
all of the buttons have been pressed, the D5 will display "Fail Switch Test". The user can either
restart the test (by pressing STORE) or exit the test (by pressing OUTPUT).
6. MIDI In/Out Test. Before running this test the user must connect a MIDI cable from the MIDI Out to
the MIDI In. If the unit passes, the D5 will display "Passed MIDI I/O" and exit the test. If the unit
Alesis D4/D5 Drum Modules Service Manual 8 02/19/03