Vector 4 - Page 134

VECTOR 4
TECHNICAL INFORMATION
SECTION I - ADJUST VCO CENTER FREQUENCY
Summary: The following section describes the techniques for
checking and, if necessary, adjusting the VCO center frequency for
both floppy and (where applicable) hard disk drives supplied with the
Vector 4 SBC. The table below indicates the test location, wave
frequency, and potentiometer used in adjusting the VCO.
YCO FREQUENCY CHART
SIGNAL LOCATION FREQUENCY POTENTIOMETER
Floppy VCO Ul-7 500 kHz R15
Hard Disk VCO U1-10 10 MHz R1
1. Make sure that system is turned off.
2. Make sure that there are NO CABLES plugged into connectors at forward
edge of board. Turn system ON.
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