Sharp 21HF2-SS, Руководство по обслуживанию

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21HF2-SS
3 – 15
3. CONVERGENCE ADJUSTMENT
No. Adjustment point Adjustment condition/procedure Waveform or others
1 CONVERGENCE
ADJ.
( To be done after
the purity adjust-
ment.) 1. Receive the "Crosshatch Pattern" signal.
2. Using the remote controller, call NORMAL mode.
Static convergence
1. Turn the 4-pole magnet to a proper opening an gle in order to
superpose the blue and red colours.
2. Turn the 6-pole magnet to a proper opening angle in order to
superpose the green colour over the blue and red colours.
Dynamic convergence.
1. Adjust the convergence on the fringes of the screen in the fol
lowing steps.
a) Fig. a: Drive the wedge at point "a" and swing the deflection
coil upward.
b) Fig. b: Drive the wedge at point "b" and "c" and swing the
deflection coil downward.
c) Fig. c: Drive the "c" wedge deeper and swing the deflection
coil rightward..
d) Fig. d: Drive the "b" wedge deeper and swing the deflection
coil leftward.
2. Fix all the wedges on the CRT and apply glass tape over them.
3. Apply lacquer to the deflection yoke lock screw, magnet unit
(purity, 4-pole, 6-pole magnets) and magnet unit lock screw.
Finally received the Red-only and Blue-only signals to make
sure there is no other colours on the screen.
4-pole magnet
6-pole magnet
C R T neck
20mm
Lacquer
P urity magnet
R G B
B G R
R
G
B
R
G
B
B
G
R
B
G
R
R G B
B G R
Lacquer
W edge "a"
W edge
"b"
W edge
"c"
About
100Deg
About
100Deg
F ig. a
F ig. b
F ig. c
F ig. d