Diagnose And Service Of Panel; Block Function Of Panel; Trouble Diagnosis; The Screen Is Not Bright - Sanyo PDP-42XS1 Service Manual

Diagnose and service of panel

1. Block function of panel

The power supply board, Logic board, X drive board, Y drive board, Logic BUFFER (E and F) and Y
BUFFER (upper and lower) of the PDP panel.
Y BUFFER (upper) Power supply board
Y drive board
X drive board
Y BUFFER (lower)
Logic board
Logic BUFFER (E) Logic BUFFER (F)
COF(7 piece)
* Power supply board: to supply power for the screen, other functional modules on the screen, our own
main board, and video frequency processing board.
* X driving board: to produce and provide driving signal for X electrode according to the time sequence
signal sent from logic board.
* Y driving board: to produce and provide driving signal for Y electrode according to the time sequence
signal sent from logic board.
*Logic board: to process the image signal sent from the main board, to produce addressing signal and
to provide driving signal for X and Y driving boards.
*Logic BUFFER board: To convert the data signal and control signal sent from the logic board into the
signals required by COF.
*Y BUFFER board: to transmit the scanning signal from the Y driving board to the screen, which is
divided into upper and lower parts.
*COF: to convert the signal sent from the logic BUFFER board into the address signal used by the
screen.

2.Trouble diagnosis:

2.1 The screen is not bright:

2.2 There appears on the screen a line or several unlit lines.
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