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21
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
z
Bad status in signal receiving
z
Poor
signal
z
Check if there are failures with the electrical connector or
the antenna.
z
Check if the antenna is properly connected.
Fringe in picture
z
Check if the antenna is correctly oriented.
z
Maybe there is electric wave reflected from hilltop or
building.
Picture is interfered by stripe shaped
bright spots
z
Possibly due to interference from automobile, train, high
voltage transmission line, neon lamp etc.
z
Maybe there is interference between antenna and power
supply line. Please try to separate them in a longer
distance.
z
Maybe the shielded-layer of signal wire is not connected
properly to the connector.
There appear streaks or light color
on the screen
z
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
z
Check to see if the power plug has been inserted properly
into the socket.
No picture and sound
z
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)
z
See if it’s receiving the signal that is transmitted from other
source than the station
z
Check if it’s connected to the wrong terminal or if the input
mode is correct.
z
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
z
Check if all the picture setups have been corrected.
Screen position or size is not proper
z
Check is the screen position and size is correctly set up.
Picture is twisted and deformed
z
Check to see if the picture-frame ratio is properly set up.
Picture color changed or colorless
z
Check the “Component” or “RGB” settings of the liquid
crystal TV set and make proper adjustment according to the
Summary of Contents for PH-50HU31
Page 1: ...PDP TELEVISION PH 50HU31...
Page 10: ...8 6 Select the document then the window will appear as shown below Select...
Page 18: ...16...
Page 20: ...18...
Page 21: ...19 Pin description 1 7 L R input 19 14 L R output 6 10 mute control input...
Page 22: ......
Page 28: ...main board...
Page 29: ...main board...
Page 30: ...main board...
Page 31: ...main board...
Page 32: ...analog board...
Page 33: ...key board...
Page 34: ...IR board...
Page 35: ...AV board...
Page 36: ...Power board A...
Page 37: ...Power board B...
Page 39: ...APPENDIX A EXPLODED VIEW PH50x31...
Page 41: ...9350HU3123 Ver 1 0...