Sharp 21XF30, Руководство по обслуживанию

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9
21XF30
21XF50
9-1
9-2
PURITY ADJUSTMENT
No.
Adjusting point
Adjusting pr
ocedure/conditions
W
a
vef
orm and other
s
PURITY ADJ
.
1
.
Receiv
e the GREEN-ONL
Y signal.
Adjust the
beam current to ~700
µ
A.
2
.
Degauss the CR
T enough with the degausing coil.
Note:
Follo
w the Job Instruction Sheet to ad-
just the ma
gnetic field.
V
e
rtical Bv:
+0.010 mT (0.10 gauss)
Hor
izontal Bh:
+0.040 mT (0.40 gauss)
(Ref
erence:
page E-13)
3.
Maintain the pur
ity magnet at the z
ero magnetic
field and k
eep the static con
v
ergence roughly
adjusted.
4
.
Obser
v
e
the points a, b as sho
wn in Fig.
4-1
through the microscope
. Adjust the landing to the
A r
ank requirements
.
5.
Or
ient the r
aster rotation to 0 eastw
ard.
6.
Tighten up the deflection coil scre
ws
.
»
Tightening
torque:
108
±
20 N (11
±
2 kgf)
7
.
Mak
e sure the CR
T cor
ners landing meet the A
rank requirements
. If not, stic
k the magnet sheet
to correct it. Note:
T
h
is
a
d
justment m
ust be done after
warming up the unit f
or 30 min
utes or
long
er with a beam current o
ver 700
µ
A.
Note:
Set the ser
vice mode b
y
TP1001 &
TP1002 (shor
t) then press factor
y pr
oc-
ess R/C RGB ke
y to c
h
ang
e
to RGB
mono colour mode
.
*
F
or the f
ollo
wing colours press R/C RGB k
ey
t
o
change
.
1
Fig. 4-1
Fig. 4-2
Fig. 4-3
*
Press R/C RGB k
e
y
f
or 1 sec-
ond in NORMAL MODE, the colour will change to RGB mono colour mode
.
T
e
xt K
e
y
“ R.G.Cy
“ K
e
y can be
directly use to change to other colours screen.
Signal-colour
screen cleared
GREEN
ONLY
BLUE
ONLY
RED
ONLY
a
b
A
B A
30mm
30mm
B
A = B A = B
Rank "A"
(on the right of the CRT)
Rank "A"
(on the left of the CRT)
CONVERGENCE ADJUSTMENT
No.
Adjusting point
Adjusting pr
ocedure/conditions
W
a
vef
orm and other
s
CONVERGENC ADJ
.
(
T
o
be done
after the purity adjustment.
1.
Receiv
e the "Crosshatch P
atter
n" signal.
2
.
Using the remote controller
, call NORMAL mode
.
Static con
ver
gence
1.
T
u
rn
the 4-pole magnet to a proper opening an-
gle in order to super
pose the b
lue and red col-
ours
.
2.
T
u
rn
the 6-pole magnet to a proper opening an-
gle in order to super
pose the g
reen colour o
v
er
the b
lue and red colours
.
Dynamic con
ver
g
ence
1
.
Adjust the con
v
ergence on the fr
inges of the
screen in the f
o
llo
wing steps
.
a
)
Fig.
5-1:
Dr
iv
e the w
edge at point "a" and s
wing
the deflection coil upw
ard.
b)
Fig.
5-2:
Dr
iv
e the wedge at points "b" and "c"
and s
wing the deflection coil do
wnw
ard.
c
)
Fig.
5-3:
Dr
iv
e the "c" w
edge deeper and s
wing
the deflection coil r
ightw
ard.
d
)
Fig.
5-4:
Drive the "b" wedg
e deeper and
s
wing the deflection coil leftwar
d.
2
.
Fix all the wedges on the CR
T and apply glass
tape o
v
er them.
3
.
Apply lacquer to the deflection y
ok
e loc
k scre
w
,
magnet unit (pur
ity
, 4-pole
, 6-pole magnets) and
magnet unit loc
k scre
w
.
Finally receiv
ed the Red-only and Blue-only sig-
nals to mak
e sure there is no other colours on the
screen.
1
Fig. 5-1
Fig. 5-2 Fig. 5-3 Fig. 5-4 Fig. 5-5 Fig. 5-6
RGB
BGR
R G B
R G B
B G R
B G R
RGB BGR
Lacquer
Wedge "a"
Wedge "b"
Wedge "c"
About 100Deg
About 100Deg
4-pole magnet
6-pole magnet
CRT neck
20mm
Lacquer
Purity magnet