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Interlaced Scan Units with 4:3 Aspect Ratio
Section 1: OPTICAL & ELECTRICAL FOCUS
1.
Follow the appropriate disassembly instructions to gain access to the CRTs.
2.
If the wing nuts on the lenses are pointed toward the screen, reverse the lenses
on each tube so the wing nuts are facing the back of the set. Leave the lenses in
this position after servicing. Put the screen assembly back on.
3.
From the Service Mode press the 7 key on the remote control to display the
convergence crosshatch pattern.
4.
Push the 100 key to turn off the red tube, and the CH RTN/ENT key to turn off
the blue tube.
5.
Position a mirror for viewing the screen from the rear of the set. From the rear of
the set, loosen the wing nut on the green lens, and adjust the lens for the best
focus in the center area of the screen.
6.
From the front of the set, adjust the electrical focus control for best focus in the
center of the screen.
7.
Repeat the optical focus, and then tighten the wing nut.
8.
Repeat the electrical focus.
9.
Push the 100 key to turn on the red tube, and the 0 key to turn off the green tube.
10. Adjust the red optical and electrical focus in the same manner.
11. Push the CH RTN/ENT key to turn on the blue tube, and the 100 key to turn off
the red tube.
12. Adjust the blue optical and electrical focus in the same manner. Electrically
defocus the blue slightly, to maintain uniform brightness.
Section 2: MECHANICAL TILT ADJUSTMENT
1.
With the set still in convergence mode, and the convergence overlay on the
screen, check each CRT's tilt. If a CRT's pattern is tilted, loosen the appropriate
yoke with a non-magnetic screwdriver.
aligned vertically and horizontally. Re-tighten the yoke.
2.
Press the 7 key on the remote to store the convergence data.
3.
After the data is stored, press the 7 key on the remote again to exit the
convergence crosshatch pattern.
4.
The unit will return to service mode and display a normal picture with the letter
"S" in the upper right corner.
5.
Power the unit OFF to exit service mode.
Section 3: USER CONVERGENCE AND MAGNETIC CENTERING ADJUSTMENTS
1. Disconnect any source at the Video 1 input.
2. Turn the power on.
3. Enter the user convergence screen through the customer menu.
4. Move the red vertical cross hair as far as it will go to the right. Note the location.
Move the red vertical cross hair as far as it will go to the left. Note that location.
Set the red vertical cross hair to the center of the two extremes.
Digital Convergence Alignment
Rotate the yoke until the pattern is
Module No. TV-GEN-03
TOSHIBA PJTV
Appendix A
Page 9 of 20
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