Heathkit GDA 1205 D Schematic

Page 1

120v
50/6082

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BATTERY
CHARGER

TRAINER CABLE

TRAINER
SWITCH

SWIOZ

PLUGIN RF

MODULE

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TIMER

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BRN

R107
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CH.1
9 STICK

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(:1: 3|!) TRANSISTORS Q3 THROUGH 0.10

OPERATE IN MONOSTABLE TIMER
CIRCUITS. THE WAVEFORMS SHOWN

FOR TRANSISTOR Q3 ALSO APPLY

FOR TRANSISTORS Q4 THROUGH QIO

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8-OBIIIIEL B'IGITAL PRIIPIIIITIIIIIM. TIIIISIITTEI: _
MODEL EBA-12054!

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NOTES:

1.

3.

COMPONENT NUMBERS ARE IN THE FOLLOWING GROUPS:

1- 99 PARTS MOUNTED ON THE ENCODER CIRCUIT BOARD. .
101 ~ 199 PARTS MOUNTED ON THE TRANSMITTER CASE.
201-299 PARTS MOUNTED IN THE BATTERY CHARGER.

301 - 399 PARTS MOUNTED ON THE SERVO CENTERING

STANDARDCIRCUIT BOARD. '

ALL RESISTORS ARE Id-WATT, 10% TOLERANCE UNLESS
NOTED OTHERWISE. RESISTOR VALUES ARE IN OHMS IK=IIODOL

ALL CAPACITOR VALUES LESS THAN 1 ARE IN F. VALUES OFl
AND ABOVE ARE IN pF UNLESS NOTED OTHERWISE.

4. @THTS SYMBOL INDICATES A TEST POINT.

WHT-G RY WHT- BLK

' 5. OTHIS SYMBOL INDICATES A DC VOLTAGE MEASURED FROM
THEPOINT INDICATED TO CHASSIS. ALL VOLTAGES WERE
MEASURED WITH A HIGH INPUT IMPEDANCE VOLTMETER.
VOLTAGES MAY VARY $2036.

6. ALL MEASUREMENTS WERE MADE WITH A BATTERY VOLTAGE OF
9.6VDC. '

7. REFER TO THE CHASSIS PHOTOGRAPH AND CIRCUIT BOARD
X-RAY VIEWS FOR THE PHYSICAL LOCATION OF PARTS.