Kurzweil K2000 Service Manual page 68

SECTION
4
DIAGSO_4.DOC 12122192
not functioning properly. To test SIMMs larger than 4 megabytes, Version 1.0
of the diagnostic software is required.
The K2000's sample RAM space is divided into two banks (Bank 0 and Bank 1),
representing the two pairs of SIMM sockets. Each bank is divided arbitrarily
into four blocks with a maximum address space of 8Mb. These blocks, A-D,
represent internal divisions of the address space; they don't correspond to
any physical division of the sample RAM.
When the Sound RAM test is run, the display will indicate which block in which
bank is currently being tested. This is shown by a series of dots that
appear as the test proceeds.
As
each block is finished, the dots are
replaced with either a success message or a failure message; see Figure 4.8.
If the block fails, the malfunctioning address is indicated, as well as the
expected checksum value and the observed value. See Figure 4.9.
Figure 4.8. Sound RAM Test (currently checkinq Bank 1, Block B)
If any of the SIMMs is defective, or installed improperly, the display will
indicate a data failure or address failure as described in the overview. A
failure may also indicate a faulty connection between the Sound RAM and the
engine board. See Figure 4.9 for an example of a failure message. In this
example, Block B of Bank 1 is currently being tested. All blocks in Bank 0
have passed, and so far, there has been one failure, in Block A of Bank 1.
Figure 4.9. Sound RAM Test Failures
4.14.17 1st
N'VRAM
Test
This memory test checks the function of the backup battery power to the non-
volatile RAM (NVRAM). This test works in conjunction with the 2nd NVRAM
test; you will not receive a success or failure indication at the completion
of the 1st NVRAM test. Instead, you're prompted to power down the unit.
Wait 60 seconds after powering down, then power up again and select and
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