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SECTION 3.
ALIGNMENT PROCEDURE
3.1
INTRODUCTION
This !';ectiun provides a hask I
paragraph
3.2) and
an
extended
fparagr~ph
3.3) alignment procedure.
The
basic procedure, which should accomptlny I:UlY service
work. requires only a calibrated oscilloscope. The
cxtf:I)dt>.d
pt--rf'•:hrE',
whie:h should hl" performed at
n~·
1
t11
.
•
-
,
intervals, requires
the
oscillo·
, 1
·•
i '
.
a
•~alihrat..cd
digital
volune-
.-
as
listed in Table
:1-2~
All
,-v .... _,
~
,, m.,·-
:d
in
fhi..:
p···cedure ;;hould be
performe•'
r-·,:dule
7:
il.:uures only.
3.1 ;
r2:5:
~·-:':'UIRED
Tl,_
·- .. ·
~
the
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t:Jyui prnent
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Tnr.
111 : · •
:j,
i;
filiJioment rerwiretl
.,.-.,( 1 ' •
!t>.ted in Table
:~-2-
i".·
,-iuipment Required
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3.
l
.2
PHEPARATION
FOR
ALIGNMi;NT
F'
1
\
I.
"Perform all alignments al. normal nmbient tc::m-
Pt>rature.
2.
Remove lhe top
cover
ofthe
unit
to
h~
aligned.
3. Turn on the
unit
to be
aligned, allowing
li
wnrruup
time of Hi
lllinutcs before starting n\.igument.
,..,.
•
rt'H
1/,_
v~
(
,J ·
3.2
BASIC ALIGNMENT PKOCEDURE
3.2.1
CRT INTENSITY BIAS
1.
Selt~(:t.
Scope DC display and Ext Horiz input mode
on l.h(: System Analyzer. Sc::t the
Intensity
contwl
fully counter
clockwise.
CAUTION
[Jo net let a dot stay
ir~<
<me place
on the CR1' xcreen fur more than
.'JO seconds
bi!cause
it
r~Jill lt~aoe
u
permarwni hum in the phosphor.
2. Adjust
the
Intensity Bias potentiometer on the
Scope
Amplifie-r
hoard
(Figure
3-1)
until t~. llul
appears on the screen. l•)U 1~1~y have
to
usc_
the
Vertical and Horizonta.l po1-ntwn control {Vert,
Hori?:) on the fronl panel tu bring the dot (tnto dw
screen. Then hack olf the Intensity Bias potcn-
t.iometr:t·
until the dot just
disappear~>.
\
'
\
3.2.2
CAT INTE:NSITY
BALANC~
!II
1.
s~~lt•ct
t:icope-
nc
display and a horizontal
sweep
rate of 1 rnSec/Div on the System Analyzer. St.>t the
hvrh:onlal
timebase vernier t.o
cwihratc
(Cal) and
ndjust. the tuteusity eontrol for a
b~lrely
visible
horizontal line on Lhe CRT.
Adjust the lnlensity Balance potentiometer
(
~'igure
a-1)
for uniform intensity of the horizon-
tal trace from left to right.. The
Balance
_poten-
tiometer affectl'l the
init!flsity
on·the
left l'lide
ofthe
trace .
3 2.3 CRT ASliGMATJSM AND
GEOMETRY
l.
Select Monitor function
and Gtm/Mon Mtr dis-
play
on
the System Analyzer. Set the Intensity
c~mt.rol
fur a mediluiJ-inten$C
disphJy.
2.
While
111:1ing
the J.'ocus control
lo
maintain a
fm·used displuy at
the
center of the CUT, adjust
!
h(' Astigm:ttism and Geo1uetry potentiometer8
(Figure J ·
t)
for lhe
he>~t
focus at the outer edges
of t.hc CRT with m1llimum pilu.:ushion and barrel
distortion of the display. 'I'he two adjustments arc
interadivc;
to
get
the
best display, alternate
repeated
8U1Ull
adjustments betwaen the two
f
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