20
Trouble shooting
1. Fault clearance
Before servicing please check to find the possible causes of the troubles according to the table
below.
1.1 Antenna (signal):
Picture is out of focus or jumping
Bad status in signal receiving
Poor signal
Check if there are failures with the electrical connector or
the antenna.
Check if the antenna is properly connected.
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.
1.2 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
Содержание LC-37R25
Страница 1: ...LCD TELEVISION LC 37R25 America ...
Страница 12: ...10 Fig 1 1 Simplified functional block diagram of the MSP 34x0G ...
Страница 14: ...12 INTERNAL BLOCK DIAGRAM ...
Страница 20: ...18 8 CXA2089Q ...
Страница 21: ...CPU board Power supply board Analog board Filter board Wiring diagram 19 to speaker ...
Страница 28: ...Graphic Component IN of CPU board 203 L37R70 01DL Page 1 of 7 ...
Страница 29: ...Video decoders of CPU board 203 L37R70 01DL Page 2 of 7 ...
Страница 30: ...CPU board 203 L37R70 01DL Page 3 of 7 ...
Страница 31: ...Frame memory of CPU board 203 L37R70 01DL Page 4 of 7 ...
Страница 32: ...GM1601 of CPU board 203 L37R70 01DL Page 5 of 7 ...
Страница 33: ...Memory I F of CPU board 203 L37R70 01DL Page 6 of 7 ...
Страница 34: ...Power of CPU board 203 L37R70 01DL Page 7 of 7 ...
Страница 35: ...Power supply board 782 LYT25 2000 ...
Страница 36: ...Filter board 782 L37R7 5100 ...
Страница 37: ...Analog board 782 L37R7 5300 Page 1 of 2 ...
Страница 38: ...Analog board 782 L37R7 5300 Page 2 of 2 ...
Страница 81: ...603 L37R250 10 11 Ver 1 0 ...