Green Geometry - Toshiba TW40F80 Quick Reference Manual

4. Check the centering of the cross bar
pattern with the centering notches in the bezel
on the TP50F50/51. For the TW40F80 and
TW56F80, use two pieces of string stretched
diagonally, corner to corner, to find the center
of the screen, or use the FULL center cross
hairs of the FULL / WIDE 1 convergence
template.
5. If the horizontal position is off, push the
channel up or down key until the "HPOS"
register appears. Use the volume key to
center the pattern.
6. If the vertical position is off, push the
channel up or down key until the" VPOS"
register appears. Use the volume key to
center the pattern.
7. Push the TV/VIDEO key until no test
pattern is displayed. Turn the power off.

7. Green Geometry

1. Put the set in the service adjustment
mode and bring up the convergence cross
hatch pattern. Select the FULL picture size
for the TW40F80 and TW56F80.
2. Push the 100 key to turn off the red
tube, and RTN to turn off the blue tube.
3. Place the convergence template on the
screen and align the center cross hairs with
the center of the screen. Start with the FULL /
WIDE 1 template on the TW40F80 and
TW56F80. The solid line crosshatch is for
FULL. The dashed line crosshatch is for
WIDE 1.
4. Use low tack masking tape to attach
the template to the bezel. Get the template as
flat as possible against the screen to reduce
parallax errors.
NOTE: If the microcomputer memory IC
(QA02) has been reset or replaced, or the
crosshatch pattern is not reasonably close to
the template pattern, make the adjustments in
section 11 (WID, HIT, & VLIN Adjustments).
Then proceed with step 5.
5. Push the 3 key on the remote until the
blinking cursor in the upper left corner of the
screen turns green.
6. Move the blinking cursor to the right
with the 6 key, then down with the 8 key until
it's one line to the right of center. The 4 key
moves the cursor to the left, and the 2 key
moves it up.
7. Push the 5 key to lock the cursor in
place.
8. Use the 2, 6, 8, and 4 keys to align the
lines of the cross hatch with those on the
template.
9. Push the 5 key to unlock the cursor.
10. Move the cursor to another location
and repeat steps 7 and 8.
There are two common methods for
accomplishing digital convergence:
A. The first method begins in the center
of the screen and moves in a counter-clock-
wise spiral outward to the various adjustment
locations on the crosshatch pattern.
At each adjustment location the cross-
hatch line is pulled vertically and horizontally
to align with the template.
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