XOCECO LEC3205, Service Manual

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Fringe in picture Check if the antenna is correctly oriented.
Maybe there is electric wave reflected from hilltop or
building.
Picture is interfered by stripe
shaped bright spots Possibly due to interference from automobile, train, high
voltage transmission line, neon lamp etc.
Maybe there is interference between antenna and power
supply line. Please try to separate them in a longer
distance.
Maybe the shielded-layer of signal wire is not connected
properly to the connector.
There appear streaks or light color
on the screen Check if interfered by other equipment and if interfered
possibly by the equipment like transmitting antenna, non
professional radio station and cellular phone.
2.TV set:
Symptoms Possible cause
Unable to switch the power on Check to see if the power plug has been inserted
properly into the socket.
No picture and sound Check to see if the power supply of liquid crystal TV
has been switched on. ( as can be indicated by the
red LED at the front of the TV set)
See if it’s receiving the signal that is transmitted from
other source than the station
Check if it’s connected to the wrong terminal or if the
input mode is correct.
Check if the signal cable connection between video
frequency source and the liquid crystal TV set is
correct.
Deterioration of color phase or color
tone Check if all the picture setups have been corrected.
Screen position or size is not proper Check is the screen position and size is correctly set
up.
Picture is twisted and deformed Check to see if the picture-frame ratio is properly set
up.
Picture color changed or colorless Check the “Component” or “RGB” settings of the
liquid crystal TV set and make proper adjustment
according to the signal types.
Picture too bright and there is
distortion in the brightest area Check if the contrast setting is too high.
Possibly the output quality of DVD broadcaster is set
too high.
It maybe also due to improper terminal connection of
the video frequency signal in a certain position of the
system.
Picture is whitish or too bright in the Check if the setting for the brightness is too high