Rear projection T.V., Model # P46721BA chassis # CTC 169PK How do you get into the convergence service menu, & also, how do you adjust the horizontal width, & centering? Can't find anything online, or on RCA site. Thanks, Dani.
You don't get into the service menu.
Width and centering are analog controls inside the rear of the set. Make certain that any faults are repaired first and check all voltages. It is common for the convergence and width to go bad when the power regulator starts to have problems from either the 15V diode or many different capacitors in the smps.
It is an analog convergence panel which requires a pattern generator and every control interacts with other controls. All the convergence power supply voltages and waveforms must be checked if it has changed over time before starting to move any controls.
It only takes 3-4 hours on average to totally re-work the registration and convergence after someone who had no clue what they were doing messed with all the controls while there was a fault present.
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