Heathkit IP 28 Schematic

Page 1

CURRENT

s 3. a RANGE

HOIE: IRANSFORMIR LEAD 2.2va IVIOL @
NUAIBERS RUIR T0 T! W .
lUOS 0F TERMINAL STRIP YEL
As IN It MANUAL figfiéfl
CURRENT
WHT-BRN ID -|>
52~A
cufifiENT
p, __+" _ ma VOLTAGE #:cs
2" soo " sooo "" so
?5\ 1]. 50V
are
IIK
Il.
sz-c 4
WHY-BLI©
I?
27K PL'Z 99 -' 06 D7 .
33300 08 f
SLR-Ru) # . i . BU . _ DLK
-®0N
5" W
BRN 0- WMY~ORG J- ©
55-13 =
SMOOTH 3/] ' RED
EDGE : RED . . _
; 3 I _I SHOWN IN
I 1 ». l
u__ I :1 A... 51".
280%? g, mg 05 ps IE DIOI DC ON I OE}
3 3300 m 2200 m sue on M aw 6 G 52 'VOlTAGi
-~'\\-M/~ ' M ' E . *9
.........._..............___,...I / ss-A W L I 53 0. IA
: i * VOLTAGE 0+: 55 10V
' I 3_6 W 3 CONTROL T S'A' DSY
: : 04 as '°"54-A 3 WHITE. i J
I I 155V 36" VOLTAGE
I l RANGE
I l I I
I I g Ac
t I J IS v
i { Iwm-am OJ PART MAY BE BASE
:counacwom ron QAOVAC: A N0. COMPONENT REPLACED WITH BIA-CRAN-
I-..--....-..--......---.....--I "'-
E
0;
417-20} (.02 2N3906 C 35
e
W
NOTES: B 0 O £
.1 y 3 2243055
I. RESJSIOR VALUES ARE IN 0HMS[K=1.UDD),RESISIORS ARE 112 WATT UNLE$S SPECIAL SYMBOLS em .u, G o
0TH£RWISE MARKED' Numbers of letters within CRC
.. , ' \. "II V'r .) _1_
2. CAPACITOR VALUES ARE IN MICROFARAIJS {III}. CAPACIIOR WORKING ME" mm 85 V ° Y
SCHEMATIC OF THE VOLTAGES ARE INDICATED. A SLIDE gwITcH TERMINAL F.
O /£~j\
HEATHKIT 3. THE CROSS ARROW goanN A CONTROL ARM SYMBOL INDICATES CLOCKWISE CIRCUIT BOARD NUMBERED Nous 7'10? 04 m MB
1-30V DC REGULATED ROTATION OE CONTROL. (6) TRANSISTOR Tzflm1NAL __.._.F'--~-
POWER SUPPLY 4 ac VOLIAM MEASUREMENTS AK£N A o FER Q) CDNTPOL " SWITCH IERIHAL WE
_ . a. .~ I VIIIII HIGH IMPEDANCE V Um I . , 0K - I.. . c (5;)
MODEL "3 28 VOUAMS MAY VARY 110%. MUM £15.06 13" 0.
b. ALL VOIIAcEs WERE MEASURED WITH; REAR APRON TERMINAL STRIP II
III NO LOAD ON ma OUIPOI IfRMINALS AND 115 VAC, bflHz. 0N 1Ht _ , _ 7 ~ -- -
90w: IRANSI-ORMER PRIMARY, © PANEL BINDING POST 57.2, (-05 03- snu¢m~,500 PW, IA
12: THE VOITAGL CONTROL ANO IHE CURRiNI CONTROL may CLOCKWISE Dim-01°
AND THE. VOLTAG£ RANGE SWITCH IN THE 30'»! POSITION. @ DC VOLTAGE {ROM POINT SHOWN Io BLACK EINDING POST. c . a 56 V 1mm);
c. WHERE 1W0 VOITAGES ARE SHowN. III: CIRCNII VON/ICE DEPENDS 0' 9 w
UPON THE SETIINGS III THE VOL1AG£ RANGE SWIICH (5-4} AND IIII J JUMPER CONNECIION 0N REAR APRON sass 05 36 .4 MR I,
VOLTAGE COIIIROIIRI},
50-76 DE 1M"?i
5. sm 09317 HAS A 200 PF DISK CERAMIC CAPACITOR FROM 06 COLLECTOR T0 GND

(BLACK BINDING POST).

Page 2

SMOOTH
EDQE

| 1

NOTE: TRANSFORMER LEAD
NUMBERS RUIR To Tfli

lUCS OF TERMINM STRIP
A3 IN THE MANUL.

WHT-BRN A

CURRENT

s2-c 4

I?
27K

BLK' RED

BRN

p IBBED
cos:

t..........._....-...._.........___......
I ELK I
I TO I
s 52.: I
l _ I
l I
I I
1 :
I i
l I
I I
I I
: l

(CONNECTIONS ron zaovAcI

I-n--..___--~.w.-------I

SCHEMATIC OF THE.

HEATHKIT®

1-30V DC REGULATED

POWER SUPPLY
MODEL TP-28

__+(, _
"" 500 "
av
b O i . ELK
WHTORG
n M 05 25
D3 3300 m 2200 M 5.0 cm IoK
-V\N-MA ' M
VDLTAGC
3-6 U 3 CONTROL
V
D4 05 '°V$4-A 3°
55" 36" VOLTAGE
RANGE
GRN
NOTES:

1.

RESISTOR VALUES ART: IN OHMSIK=1.UUD),R[SISTGR$ ARE 112 WATT [INLET
OTHERWISE MARKED.

CAPACITOR VALUES ARE HI MICROFARAQS (uF). CAPACITOR WORKING
vouasis ARE lNDlCATfD.

THE CROSS ARROW éIHON A CONTROL ARM SYMBOL INDICATES CLOCKW

ROTATION OF CONTROL.

DC VOITAG£ MEASUREMfNTS TAKiN WITH A HIGH lMPfiDANCE VOLTMF

VOLIACLS MAY VARY 110%.

ALL VOLTACES WERE MEASURED WITH:

{TI NO LOAD 0N TIIL OUTPUT TERMINALS AND 115 VAC, 60H2.0N1H£
9OWER TRANSFORMER PRIMARY,

(2 THE VOLTAGE CONTROL AND THE CURRiNT CONTROL TULLY CLOCK
AND THE. VOLTAGE RANGE SWITCH IN THE 30V POSITION.

WHIRE TWO VOLTAGES ARE SHOWN, TIIE CIRCUIT VOLT/ICE DEPfNDS

UPON THE SETTINGS Of THE VOLTAGI RANGE SWITCH (3-4} ANT) TIT?

VOLTAGE CONTROLTRTL

S/N 09317 HAS A 200 PF DISK CERAMIC CAPACITOR FROM 06 COLLECTOR T0 Gl
(BLACK BINDING POST).