Heathkit IO 20 Schematic

Page 2

[_______
SWEEP

-.

GENERATOR LI

[_._._____

HORIZONTALI

I DEFLECTION |

I AMPLIFIER I
-

s r (*9
47K/2w 470K 47 390K @
RI9 R20 R21
To
CRT e
SWEEP CATHODE
cu 00' PULSE CATHODE FOLLOWER m
' FOLLOWER -
HORIZONTAL
:39 SWEEP CHARGING -'-I2AX7 DEFLECTION
DIODE 2 ~AMPLIFIER
m. o4 E'ZAW
I 47K
H?
T SW-IA
> O O o
0 RM
0 m IM
0
ma 0 0 .0:
IM 4
FT 0 o 1
5
GE 6 Cl? 75M
4 $ RIGHT EDGE

ZCESSORY SOCKET

I
I CR TUBE
I CIRCUIT

ZM/Zw
R37
CR TUBE
2M/2w
R38
IM ¢ IM
R39 FOCUS p R42
ASTIGMATISM
'MI'W TOOK/Iw 2
R40 . AAA
R41
I
i TRIGGER con.
r- ' T .. _ BLACK ¢
7" ' 1. f; 5 f
20/4sov 1 o-I 7/ 1 n C- {_ r.- a:
z: D 3% 2/ I __.____.__ RED OSECONDARYI
_ . 4" wHITE
40-1 22 I OPRIMARY
' TEST CABLE
p NOTES:
SCHEMAT'C OF THE SELECTOR SWITCH SW-l SHOWN IN SECONDARY NORMAL POSITION.
® SUPERIMPOSED-PARADE SWITCH SWZ SHOWN IN PARADE POSITION.
HEATHK'T VERTICAL EXPAND SWITCH SIN-3 SHOWN IN NORMAL POSITION.
_ ..__.I

IGNITION ANALYZER

MODEL l0-20

VOLTAGES SHOWN ARE MEASURED WITH VTVM, ll MEGOHM RESISTANCE.

ALL RESISTORS ARE MARKED IN OHMS AND ARE 1/2 WATT UNLESS
OTHERWISE SPECIFIED.

ALL CAPACITORS ARE MARKED IN IJED UNLESS OTHERWISE SPECIFIED.
MULTIPLIERS: K

1000 M 1,000,000

56 VOLTAGE VARIES WITH CONTROL SETTINGS.