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PURITY AND CONVERGENCE
PURITY ADJUSTMENT
1. Allow the receiver to warm up for 10 minutes.
2. Pull the yoke toward the picture tube socket.
3. Connect a Cross Hatch Generator to the receiver and
"rough in" the static (center) convergence as follows:
a.
Adjust the four pole static control by alternately
rotating the knob laterally to bring the red and blue
lines into convergence in the horizontal direction.
Move the knob radially around the neck of the tube
(in a 45
0
arc) from the top of dead center position
to cause the red and blue lines to converge ver-
tically.
"TABS
RElEASE rASS(4)
TO REMOVE VtOEO
OUTPUT MOOUlE
:VU)EO
,OUTPUT-~
MOOUlE
; 9-15&01
b.
After the four pole magnet has been adjusted to
superimpose the red and blue lines on top of one
another, use the six pole amplitude adjustment to
place the converged blue and red lines over the
green line. Position the knob radially in a 30· arc
from top dead center to move them vertically.
Rotating the knob laterally will move the converg-
ed beam to the left or right.
MASTER G·2 CONTROL ADJUSTMENT
Before proceeding with the Purity Adjustment, the Master
G-2 control must be adjusted.
Turn the G-2 control clockwise until a dim raster appears. If
the screen remains black with the G-2 control fully
clockwise, advance the brightness range control on the
low level luminance module until the dim raster appears.
. PURITY
.
FOCUS PLUG
TO HIGH
VOLTAGE
TRANSFORMER
ANO
I"~
.~)
ASSEMBLY
3D PLUG
TO 9-160
MOilULE
FIGURE
6 -
NECK COMPONENTS.
6
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