Kurzweil K250 - Page 98

TABLE 3: SAMPLE DAC OUTPUTS
U62 PIN 20 CHANNEL 1
U63 PIN 20
CHANNEL 2
U64
PIN 20 CHANN&L 3 .
U65 PIN 20
CHANNEL· 4
U66 PIN 20 CHANNEL 5
U67 PIN 20 CHANNEL 6
U68
PIN 20
CHANNEL 7
U69 PIN 20
CHANNEL 8
U70 PIN 20
CHANNEL 9
U71 PIN 20 CHANNEL 10
U72 PIN 20
CHANNEL 11
U73 PIN 20 CHANNEL 12
4.15 - AMPLITUDE DAC TEST
The Amplitude DAC output waveforms should appear as shown
in figure 2 at each of the test points on the Channel board shown in
Table 4.
FIGURE 2: AMPLITUDE DAC OPAMP OUTPUT WAVEFORM
~67 ms-+
TABLE 4: AMPL ITUDE DAC OUTPUTS
U82
U82
U83
U83
U84
U84
U102
U102
Ul03
Ul03
U104
U104
PIN 7 CHANNEL 1
PIN 1 CHANNEL 2
PIN 7 CHANNEL 3
PIN 1 CHANNEL 4
PIN 7 CHANNEL 5
PIN 1 CHANNEL 6
PIN 7 CHANNEL 7
PIN 1 CHANNEL 8
PIN 7 CHANNEL 9
PIN 1
CHANNEL 10
PIN 7 CHANNEL 11
PIN 1
CHANNEL 12
Kurzwell 250 Service Manual, Chapter 4
4- 2 8