Sony TRINITRON KV-E2911D - Section 3 Set-Up Adjustments; Beam Landing

_ KV-E2511D |
RM-689
SECTION 3
SET-UP ADJUSTMENTS
@ When complete readjustment is necessary or a new
receiver tube is installed, carry out the following
adjustments,
@ Unless there is specific instruction to the contrary,
carry out these adjustments with the rated power
supply,
Unless there is specific instruction to the contrary,
set the controls and switches this way:
O CONtrast srrceestceeseresvevcvereesserseeees 80%
(or remote control
normal)
XE Brightness errcrsessersceeeeeeeeneeessccees 50%
Carry out the following adjustments in this order:
1, Beam landing
2. Convergence
3. Focus
4, White balance
Note: Testing equipment required
1,Color bar/pattern generator
2, Degausser
3.DC power supply
4, Digital multimeter
5. Oscilloscope
Preparations
@ In order to reduce the influence of geomagnetism on
the set’s PICTURE TUBE face it east or west.
@ Switch on the set’s power and degauss with the
degausser,
3-1, BEAM LANDING
1, Input the raster signal with the pattern generator.
Contras
Brightness
2. Set the pattern generator raster signal to red.
3. Move the deflection yoke to the rear and adjust with
the purity control so that the red is at the center
normale
and the blue and the green take up equally sized areas
on each side. (See Figures 3-1 through 3-3)
4. Move the deflection yoke forward and adjust so that
entire screen is red. (See Figure 3—1)
5. Switch the raster signal to blue, then to green and
verify the condition.
6. When the position of the deflection yoke has been
decided, fasten the deflection yoke with the screws.
7. If the beam does not land correctly in all the corners,
use a magnet to adjust it. (See Figure 3-4)
purity control
Fig.3-3
Disk magnets or
rotatable disk
magnets correct
these areas (a—d).
Deflection yoke positioning
corrects these areas.
fo 7 *
cod
ree
a
R ron o~o|
38 J
\
ea 2
Ibe, aC
ae Bx. e
= wv
Ge
| Z
1 wee
Le Fig.3-4