Heathkit HD 8999 Schematic
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Extracted text from Heathkit HD 8999 Schematic (Ocr-read)
Page 1
MAIN CIRCUIT 3mm:
GNP ENABLE
I DISPLAY CIRCUIT BOARD
vzou V202 v20: V204
all-um CIF'I «1-HT «HM
E...
SOHEMATIC OF THE
HEATHKIT®
MODEL HD-8999
ULTRA PRO
CW KEYBOARD
NOTES:
1. PARTS ARE NUMBERED IN THE FOLLOWING GROUPS:
1-99 PARTS ON THE MAIN CIRCUIT BOARD.
101-199 PARTS ON THE CHASSIS.
201-299 PARTS ON THE DISPLAY CIRCUIT BOARD.
Z. ALL RESISTORS ARE RATED AT Ill-WATT AND HAVE A TOLERANCE
0F 5i. RESISTOR VALUES ARE IN OHMS (KIIDODI.
3. ALL CAPACITOR VALUES ARE IN MICROFARADS.
THIS SYMBOL INDICATES CIRCUIT BOARD GROUND.
5. EL THIS SYMBOL INDICATES CHASSIS GROUND.
0 THIS SYMBOL WITH A LETTER IN IT INDICATES A WIRE
CONNECTED To A CIRCUIT BOARD HOLE.
1. 9>-THI5 SYMBOL INDICATES A PLUG-IN CONNECTION.
a. OTHIS SVMBOL INDICATES A Dc VOLTAGE TAKEN WITH A
HIGH INPUT IMPEDANCE VTVM FROM THE POINT
INDICATED To CHASSIS GROUND (ALL VOLTAGES
ARE 2 201.).
9. cTHIS SYMBOL INDICATES A COMPONENT DRAWN
WITHIN THE CIRCUIT BOARD OUTLINE THAT Is
pm 5954941 ACTUALLY MOUNTED ON THE CHASSIS.
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