Heathkit GDA 1205 4 Schematic

Page 1

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SCHEMAT-lc or THE
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DIGITAL 'PROPORTFONIL SERVO

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NOTES, _ _ ' 7. ALL VOLTAGES ARE MEASURED WITH A HIGH IMPEDANCE VOLTMETER FROM

. THE POINT [NDTCATED TO COMMON GROUND. VOLTAGES MAY VARY i207o.
1. ALL RESISTORS ARE 1/4 WATT. RESISTOR VALUES ARE IN OHMS IK=1000J.

3. REFER TO THE SERVO PHOTOGRAPH AND CIRCUIT BOARD X-RAY VIEW FOR
2. ALL CAPACITOR VALUES ARE IN 11F UNLESS OTHERWISE MARKED. THE PHYSICAL LOCATION OF PARTS

3. OTHIS SYMBOL INDICATES A POSITIVE oc VOLTAGE MEASUREMENT.

4. THIS' SYMBOL INDICATES THE NORMAL OPERATING VOLTAGE RANGE.

FLAT SIDE
5. VOLTAGE 0N PIN 2 OF THE lC IS VARIABLE FROM 0.2 T0 0.4, DEPENDING

ON THE INPUT PULSE. VOLTAGE SHOWN IS WITH THE SERVO IN THE CENTER
OF TRAVEL.

MP56'5'62
6. VOLTAGE 0N PIN 6 OF THE [C IS VARIABLE FROM 1.5 T0 2.7, DEPENDING

ON THE INPUT PULSE. VOLTAGE SHOWN IS WITH THE SERVO IN THE CENTER
OF TRAVEL.