Sony TRINITRON KV-M2140B - Section 3 Set-Up Adjustments; 3-1. Beam Landing

| KV-M2140B
RM-694
SECTION 3
SET-UP ADJUSTMENTS
@ The following adjustments should be made when
a
complete
realignment
is
required
or
a
new
picture tube is installed.
@ These adjustments should be performed with
rated
power
supply
voltage
unless
otherwise
noted.
The
controls
and
switch
below
should
be
set
as
follows
unless
otherwise
noted
:
Q
CONTRASTcontrol.........
80%(or
Normal
by
commander)
<%
BRIGHTNESS
control.....50%
Perform the adjustments in order as follows:
Preparation:
@ Set the side of the unit with the PICTUE TUBE so
that
it
faces
east
or
west
in
order
to
reduce
the
influence of external magnetic force.
@ Turn the power switch for the unit ON and erase
the magnetic force using a degausser..
3-1. BEAM LANDING
Demagnetize with a degausser
1. Input a raster signal with the pattern generator.
CONTRAST
BRIGHTNESS
2. Turn the raster signal of the pattern generator
} normal
to red.
3. Move the deflection yoke backward, and adjust
with the purity control so that red is in the center
and blue and green are at the sides evenly.
(Fig.3-1 - 3-3)
. Move the deflection yoke forward, and adjust so
ry
that the entire screen becomes red. (Fig.3-1)
ha
Switch over the raster signal to blue and green
confirm the condition.
6. When the position of the deflection yoke is
determined,tighten it with a deflection yoke mount-
ing screw.
7. When landing at the corner is not right, adjust
by using the disk magnets. (Fig.3-4)
Fig.3-1 —9—
1. Beam Landing
2. Convergence
3. Focus
4. Screen (G 2) and White Balance
Note: Test Equipment Required.
1. Color bar/Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital multimeter
5. Oscilloscope
Purity control
Disk magnets or
rotatable disk
magnets correct
these areas(a-d).