Heathkit IP 2728 Schematic

Page 1

5w) H5 "

PL-t 07
TI H £9 R, _

RED
0 WT *

NOTES:
417-109

1. ALL RESISTORS ARE 1/2 WATT UNLESS OTHERWISE MARKED.

2N3566

2. ALL CAPACITORS ARE IN LIE.

O INDICATES A DC VOLTAGE MEASUREMENT FROM POINT INDICATED
T0 NEGATIVE (-I OUTPUT TERMINAL. WHERE TWO VOLTAGES ARE
SHOWN, THE VOLTAGE PRESENT DEPENDS UPON THE SETTING
OF THE VOLTAGE CONTROL.

VJ

417-162

2N3055

4. ALL VOLTAGES WERE MEASURED WITH NO LOAD ON THE OUTPUT
TERMINALS AT 120 VAC 60 HZ INPUT.

5. VOLTAGE MEASUREMENTS WERE MADE WITH AN 11 MEGOHM INPUT VOLT~

417-118

04,05

2N3393

METER AND MAY VARY 110%.

01, 02, D3

SILICON, 100 PIV, 1A

6. ARROWS 0N CONTROLS INDICATE CLOCKWISE ROTATION.

D4

SARKES VR20,1WATT

7. FT IS: 3/16-AMP SLOW-BLOW FOR 120 VAC.

D5

1N191

1/10~AMP SLOW-BLOW FOR 240 VAC.
Part of 595-1955-01

Capyright © 1976

Heath Company

All Rights Reserved

Printed in the United States of America

-1

NE2H

5n-5w
$ RB 20
- 27K VAC
ELK-RED
I/'
I c; + ELL.
120 20 T 2500 250
l VAC 8
31 I I as
K 02
/ RED N
3/16-AMPERE 210
SLOW BLOW F1
(VB-AMPERE / ELK-YEL
FOR 240 VAC) 1
I
I
| E _I_120 _. .
2:,- I
50/60HZ I
120-24ov L
\ BLK
4' GRN M AC -oc +
g o W____ 2 CD
1000 JUMPER
(2 04;, E... cg
30 ~ w - --r- 2
42
VAC + sofl 20+ + 0
R4 C
5000
owe
03 92 J +
GRN fl . m i 4 E
0
1w VOLTAGE
SCHEMATIC OF THE COMPONENT MAY BE BASE
® REPLACED WITH DIAGRAM
HEATHKIT ____._ M
1-15 VDC REGULATED POWER SUPPLY 417-140 4304
MODEL IP-2728

Page 2

CURRENT

£06 11 £17m
f

W ' T T <9
+__c4
-700 §;%O
5" 3
r
' o 05
J a 1+ ;

GND

CHASSIS PHOTOGRAPH

POWER PROGRAMMING 03
1 TRANSFORMER TERMINALS C5 R3

BASE
DIAGRAM_

. _,VOLTAGE OUTPUT AND CURRENT
O ' CONTROL GROUND CONTROL a
BINDING POSTS