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 ;

[

I

----fi---.-d--.----a?--_
+

I
t
I

THESE LOGIC LEVELS ARE THE MINIMUI
YOU SHOULD FIND WHEN TROUBLESHOO

.IRCUIT BOARD :

o)- o In ---------@--------------------------------------------------------------------------------------------

---- --------'------------------ ------- ----------'---+-----------------------------'-------------d
I ,1 AMPLIFIER AMPLIFIER figtg'gga ECL To T-
I "5 TRANSLATOR +9,
I ISOpF 13 M 5 r
I ' 3 0301 61;"? '
: 12 15 5';st 4 .2 2N5770
l 9.10] o o
I 330 -�� mm
I 270
I IAIN
I
a? no: no: D30!
E 0302 c302 5K) 150 310 3% 33" 4'49
'50 150pF
I
I I;
' L -
I
l I u-cm , ® CHI
| I I I I * '50 ., 130
1 . H I ' H : IcaoI
, An I '\ 3 , .
Mr. . r «rum.- .-- - amgo. 4..., 4....
.:\ ' -5.2v PINB
I by? cuo PINS me
I
I --..
I, , I r 1 II V 4
: ----- (I
I J , +
I

+-
I
I

F flEOUE II CY

252
08

Pow: II on - ' " '

finnw

BLU

@-
¢_._

©

'9 15V TO IC346

>659

O®®®@

@
c123 - .. CM:
100 I00
9
r 29
e&
' I
I
I-n-J H I 0311
: Ina-19
12-5) @ 0312 i 0313
Y *INAIMQ IN4I49
T30]

FUNC T ION SW302

+5V

SWJOZ A

R325
10 K

SW30? C

aw
_i

r - - g
| I
IL 6 GATE C
.5 B ,-
I .
I
I 2 A 3
' I
Ll