TOSHIBA PJTV
Digital Convergence Alignment
Module No. TV-GEN-03
Page 8 of 20
Readme: Do not attempt to load backup data if the digital convergence PCB has
been replaced. Backup data in the new PCB memory is not created until
convergence has been adjusted and the CALIBRATION procedure has been
completed.
Something to think about:
It is important to know when a convergence alignment will not correct the unit problem.
If after following the correct procedure, the convergence cannot be aligned to factory
specifications, further troubleshooting is required. Table 3 lists a few of the many
possible symptoms.
Repeated Touch Focus errors
Intermittent loss of convergence
Repeated convergence drift of any color
Selected color will not adjust in either direction
Convergence crosshatch pattern will not display
Convergence crosshatch pattern is severely distorted
Touch Focus pattern is not displayed
Touch Focus pattern is severely distorted
Back up data will not load
Cannot enter Service Mode
Data cannot be saved after alignment
Table 3
Points to remember:
Familiarity and practice help the technician develop confidence in performing a digital
convergence alignment or determining the need for further troubleshooting. Having the
knowledge and necessary tools available are an important first step in the process of
gaining experience. While taking this first step, it is best to follow the alignment
instructions carefully and exactly. Back up data, if available, is a useful tool if problems
occur. It can provide a good starting point in certain cases, but it should not be viewed
as a “cure-all” for convergence problems. In most cases, only minor adjustments will be
necessary. Focus and centering adjustments will not be needed and the procedure can
begin in the GEOMETRY stage. Minor adjustments made in this way do not require
the use of back up data or an overlay kit. Simply make the needed adjustments, save
the new data accordingly, exit the service mode, and you’re outta there!