Heathkit IM 4130 Schematic

Page 2

6. v THIS SYMBOL INDICATES A CONNECTION TO A
VOLTAGE SOURCE.

THIS SYMBOL INDICATES A TEST POINT.

7. (:>
D. 8 ET

9. ALL RESISTORS ARE 1/4-WATT, 5% UNLESS MARKED OTHERWISE.
RESISTOR VALUES ARE IN OIIMS IK'IOOO, M'l.000.000I.

ARROW INDICATES CLOCKWISE ROTATION.

ARE W In IMICROFARADSI UNLESS MARKED
OTHERWISE. ~ H ,_

II. PARTS IN SHADED AREAS ARE CRITICAL FOR CONTINUED SAFETY.
REPLACE THEM ONLY WITH PARTS OF THE SAME RATING OR WITH
' THE PROPER HEATH PARTS.

12. IC PINS NOT SHOWN, ARE NOT CONNECTED IN THE CIRCUITS.

LOGIC LEVI

CMOS TTL
+5v- 1
3.50v
MIN
+2.0v
1.5V MIN ,
MAX ,3v
0v MAX ;

[

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+

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t
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THESE LOGIC LEVELS ARE THE MINIMUI
YOU SHOULD FIND WHEN TROUBLESHOO

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