TOSHIBA PJTV
Digital Convergence Alignment
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
Module No.
Page 8 of 20
