Kurzweil K250 - Page 85

Using an oscilloscope with probe, . check for the. following
square waves at the Ie and pin number indicated:
Ie NUMBER
U68
U68
U68
U69
U69
U69
U87
U87
U87
U88
U88
U88
U106
U106
U106
U107
U107
U107
U118
U118
U118
U119
U119
U119
PIN NUMBER
10
13
17
10
13
17
10
13
17
10
13
17
10
13
17
10
13
17
10
13
17
10
13
17
SQUARE WAVE PERIOD
. 200 nsec.
400 nsec.
600 nsec.
800 nsec.
1 Jlsec.
2 Jlsec.
3 Jlsec.
4 Jlsec.
5 Jlsec.
6 Jlsec.
7 Jlsec.
8 Jlsec.
9 Jlsec.
25 Jlsec.
50 )lsec.
75 )lsec.
100 )lsec.
125 )lsec.
150 )lsec.
175 )lsec.
200 )lsec.
225 )lsec.
250 )lsec.
500 )lsec.
Kurzwell 250 Service Manual, Chapter 4
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