Heathkit GDA 505 D Schematic 2

Page 1

, scIIEIIIIITIc or HIE
TRAINER CABLE EATKIT
a s-cIIII'IIIIEL nIRITAL PROPORTIDIIEII. TRAIsmTTER
mom son-505s:

BATTERY

CHARGER

120V
50IGOHZ 7201

ORG 4 5 W HT

3 P101 1.2v P-P

METER

VIOL.

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L4

RED +9.6V

TIME

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m

FREE RUNNING
MULTIVIBRATOR

MONOSTABLEGISD
x TIMER

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5301 RED IRE RED

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l 9307 ' NOTES:

I 10K 4. @THI SYMBOL INDICATES A TEST POINT.

' :' 1. COMPONENT NUMBERS ARE IN THE FOLLOWING GROUPS: S

' *FACTORY MATCHED I l ' 99 PARTS MOUNTED ON THE ENCODER CIRCUIT BOARD. 5. OTHIS SYMBOL INDICATES A DC VOLTAGE MEASURED FROM

'----------'---"""""I 101 - 199 PARTS MOUNTED ON THE TRANSMITTER CASE. THE POINT INDICATED TO CHASSIS. ALL VOLTAGES WERE '
MEASURED WITH A HIGH INPUT IMPEDANCE VOLTMETER.

201 - 299 PARTS MOUNTED IN THE BATTERY CHARGER.
301 - 399 PARTS MOUNTED ON THE SERVO CENTERING VOLTAGES MAY VARY $2093.

STANDARD C'RCU BOARD' 6 ALL MEASUREMENTS WERE MADE WITH A BATTERY VOLTAGE 0F
2. ALL RESISTORS ARE 1/4~WATT, 10% TOLERANCE UNLESS 9.6VDC. '
HI *) TRANSISTORS Q3 THROUGH Q7

OTHERWISE NOTED. RESISTOR VALUES ARE IN OHMS IK=10'00). _
3. ALL CAPACITOR VALUES LESS THAN 1 ARE IN LIF. VALUES OF 1_ . 7. REFER TO THE CIRCUIT BOARD X-RAY VIEWS OPERATE IN MONOSTABLE TIMER
. I , , CIRCUITS. THE WAVEFORMS
AND ABOVE ARE IN pF UNLESS NOTED OTHERWISE. . FOR THE PHYSICAL LOCATION OF PARTS. SHOWN FOR TRANS'STOR 03
use APPLY FOR TRANSISTORS

04 THROUGH Q7.