Alesis Andromeda A6 Service Manual page 10

To perform this test, press soft button 3. All of the pixels on the LCD should turn black. Press
any key to exit this test.
2.28 Slow SRAM Test
To perform this test, press soft button 4 and wait a few seconds. This will test the Slow SRAM,
or battery backed RAM, on the Digital Main PCB. The first part of this test will test the RAM
for stuck bits. The second part will test the RAM address lines to make sure there are no address
pins shorted together or open. If this test passes, the display will read "SLOW SRAM TEST
PASSED".
2.29 Test Completion
The DONE soft key (soft key 8) checks to make sure all of the tests have been performed before
letting the user exit diagnostic mode into normal keyboard mode. If any test has not been
successfully completed, the code will tell the user which test has not been done and remain in
diagnostic mode.
In addition, when all of the buttons and pots on a particular board have been successfully
exercised, the software will tell the user which boards passed (e.g., "CENTER BOARD
PASSED!") when the DONE soft key is pressed. This is for board testing, when the user is only
interested in the status of that board, not the whole system. The software will tell the user which
switches or pots were missed on the particular board being tested.
Confidential Alesis Service Manual 8-31-0089-C