Table of Contents
Advertisement
Initial Center Static Convergence
Connect a dot/cross hatch generator to the Receiver
and tune in a signal. Observe misconvergence at
center of the screen only.
Adjust the R & B pole magnets; by separating tabs and
rotating to converge blue with red.
Adjust the R & B and R & B & G pole magnets: by
separating tabs and rotating to converge blue and red
(magenta) with green.
Note:
Precise convergence at this point is not
important.
Purity Adjustment
When the Receiver is in the Service Mode for making
electronic adjustments, press Recall on the Remote
Control
to
Adjustments (Electronic Controls)" on page 28).
Operate the Receiver for 60 minutes using the first
Purity Check field (white screen) to stabilize the CRT.
Fully degauss the Receiver by using an external
degaussing coil.
Press Recall on the Remote Control again until the
Purity Check (green screen) appears.
For a 2-piece assembly (see Fig. 23):
Loosen the deflection yoke clamp screw and move the
deflection yoke back as close to the purity magnet as
possible.
Adjust the Purity rings to set the vertical green raster
precisely at the center of the screen. (See Fig. 28.)
Figure 28. Green Raster Adjustment
Slowly move the deflection yoke forward until the best
overall green screen is displayed.
Permalloy Convergence Corrector Strip (Part No. 0FMK014ZZ)
This strip is used in some sets to match the yoke and
CRT for optimum convergence. If the yoke or CRT is
replaced, the strip may not be required.
First converge the set without the strip and observe the
corners.
珍惜眼前人 搜集整理
enter
Purity
Check. (See
For a 1-piece assembly (see Fig. 26):
Slowly move the deflection yoke and purity rings
assembly toward the CRT board and adjust the purity
magnet rings to set vertical green raster at center of
screen. (See Fig. 28.)
Gradually move the deflection yoke & purity rings
forward and adjust for best overall green screen.
Continue from here for either assemblies:
Tighten the deflection yoke clamp screw.
Press Recall on the Remote Control again until the
purity check (blue screen) and (red screen) appear and
observe that good purity is obtained on each respective
field.
Press Recall on the Remote Control again until Purity
check (white screen) appears. Observe the screen for
uniform white. If purity has not been achieved, repeat
the above procedure.
"Service
Final Convergence Procedure
through Fig. 32):
Note: Vertical size and focus adjustments must be
completed prior to performing the convergence
adjustment. Connect a dot pattern generator to the
Receiver. The Brightness level should not be higher
than necessary to obtain a clear pattern.
Converge the red and the blue dots at the center of the
screen by rotating the R & B pole Static Convergence
Magnets.
Align the converged red/blue dots with the green dots
at the center of the screen by rotating the R & B & G
pole Static Convergence Magnets. Melt wax with
soldering iron to reseal the magnets.
Slightly tilt vertically and horizontally (do not rotate) the
deflection yoke to obtain a good overall convergence.
If convergence is not reached at the edges, insert
permalloy (see following section) from the DY corners
to achieve proper convergence. Recheck for purity and
readjust if necessary.
After vertical adjustment of the yoke, insert wedge at 11
o'clock
position,
adjustment.
Secure the deflection yoke by inserting two side
wedges at 3 and 7 o'clock positions.
Apply adhesive between tab (thin portion) of wedge
and CRT and place tape over the tab to secure to the
CRT.
If correction is needed:
1. Place strip between CRT and yoke, in quadrant
needing correction. Slowly move it around for
desired results.
2. Press adhesive tightly to the CRT and secure with
tape.
- 19 -
QQ:362399998
(See Fig. 29
then
make
the
horizontal
QQ群:12919880
tilt
Advertisement
Table of Contents
