Kurzweil K250 - Page 123

CGP STATUS TEST
TEST CGP
DMA? Press YES
CHANNEL 1? Press YES or NO
f
Each successive channel number will be asked until aYE S
response is given. Only one channel may be tested at a time.
During the
CGP status test, the test status will be displayed
on the front panel LCD as follows:
EXAMPLE:
CSW:DOOF
AL 1: E7F1 AL2:0000
In the above example, the CSW is the channel status word. The
four status digits are in hexadecimal.
If the test is progressing
correctly:
1. The first CSW digit will usually vary from 0 to F.
Occasionally, it will flash briefly from 0 to 5 or from F to
7. If 5 or 7 are displayed for any appreciable length of
time, there may
be a problem on the CGP board. Any number
or letter other than
0, F, 5 or 7 in the first character of the
CSW also indicates a problem on the CGP board.
2. The second and third digits will increment in pairs from 00
to FF.
3. The fourth CSW digit should always be F.
4. AL 1 will count up from 0000 to FFFF and then stop. When
AL
1 reaches FFFF, AL2 will start counting up from 0000 to
FFFF and then stop. AL 1 will then begin counting up again
from
0000 to FFFF. AL 1 and AL2 will continue counting up
alternately until SELECT is pressed.
NOTE: If the following LCD display appears and does not
change, it usually indicates that
no sample clock is present
at the channel sample DAC:
CSW: gOOF'
AL1: 0010
AL2: 0000
Kurzwell 250 Service Manual, Chapter 4
4·53