Heathkit GDA 57 2 Schematic 2

Page 1

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m

DRIVER

@104
X29Aa2e

svaOF

mm
5300

GIOS
x29A526

ELECTRONIC ELECTRONIC
SWITCH I 2:38! Q SWITCH 2 =~ cos g SWITCH a
.36 I In
373/59 22% $320 Iofio (5/560 765%

IC OF THE
'HKIT

TAL PROPORTIONAL
-IVER
GDA -57 -2

- "
I I
L__________I
CHANNEL 3
r """"" :
I I
L--. _. -_- J
+ RED
D an |__'I| {"1 eLR
2" E | I I I
| I I I
2mm wm I : : I W ._ .5 or:
i. . : :(_I_ P . .
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I I WHY , um
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L- m I g
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I. _________ _I
RESISTOR AND CAPACI7OR NUMBERS ARE IN THE FOLLOWING GROUPS: FLAT
0 99 PART; MOUNTED ON THE RECEIVER CIRCUIT BOARD. FL" />\
100-199 PARTS MOUNTED ON THE DECODER CIRCUIT BOARD. i\\(«E\
ALL RESISTORS ARE I/4 WATT UNLESS MARKED OTHERWISE. REsIsTOR VALuEs . 0" \\\
ARE IN OHMS IK : Loom. \\ ( C
C a c B a s -
ALL CAPACITOR VALUES ARE IN 7 uNLEss MARKED OTHERWISE. E E mm
IGGEMO
OTHIS SYMBOL INDICATES A POSITIVE DC VOLTAGE MEASUREMENT WITH no man:
SIGNAL BEING RECEIVED.
X29A826
{:1THIS SYMBOL INDICATES A POSITIVE uC VOLTAGE MEASUREMENT WITH SIGNAL 5232

BEING RECEIVED. .

ALL VOLTAGES ARE MEASURED WITH A HIGH IMPEDANCE VOLYMETER,
FROM THE POINT INDICATED TO COMMON GROUND. VOLTAGES MAY VARY £205;

REFER To THE CIRCUIT EOARD X»RAV VIEWS FOR THE FHVSICAL LOCATION or
PARTST