Abnormal Of The Picture; Color Abnormal - Sanyo PDP-42XS1 Service Manual

4.10 Abnormal of the picture:

4.10.1 color abnormal

a. A certain differential wire pair of LVDS (RX0+/-, RX1+/-, RX2+/-, RX3+/-) of X301 is abnormal, which
may lead to lack of color (it's not a complete loss of color).
b. Failure with resistor rows R225~R2300, which may lead to loss of corresponding color from the gray
degree corresponding to the picture of all channels.
c. Failure with resistor rows R819~R822, which may lead to loss of corresponding color from the gray
degree corresponding to the picture of VGA/YPRPB/AV/TV channels.
d. Failure with resistor rows R653~R659, which may lead to loss of corresponding color from the gray
degree corresponding to the picture of HDMI channel.
4.10.2 Abnormal picture vertically or horizontally (bar like): Abnormal in complete line extending all the
way from up downward on the screen of stand definition TV set; abnormal vertically on half screen of
high definition TV set. They may be caused by the damage of the address BUFFER module that directly
corresponds to its position, or may be caused by the damage of the connection wire that directly
corresponds to the position of the screen. The horizontal bar like abnormality is also related to the Y
driving circuit that corresponds directly to its position. To judge these phenomena, It's possible to check it
by setting the screen to the status of self check as explained above
4.10.3 No brightness in the square block area: Normally it's caused by the damage of the address
BUFFER module that directly corresponds to its position, or may be caused by the damage of the
connection wire that directly corresponds to the position of the screen. To judge these phenomena, It's
possible to check it by setting the screen to the state of self check as explained above.
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