８
V.
Failure analysis
:
Main failure analysis diagram (see Attached sheet IV)
1.
Common failures:
Other failures
Analysis procedure
Image and
accompanying sound
are interfered.
Inspect if the direction, position and connection of the antenna is
proper.
Inspect if the signal sources are inputted stably under the current
playing status with no interference.
Check if the signal wires are grounded properly.
Check if there is any interference of electrical equipment near the
unit.
Check if the power voltage inputted is stable.
Check if there are any buildings that reflect the broadcasting
electromagnetic waves in the TV receiving environment.
Start up and check if the various options are all correct.
With static pictures
but no images and
accompanying sound
Check for proper signal insertion.
Check if the remote control functions properly.
Check for correct settings of image and volume.
Switch off and open the cover of the unit to check the signal terminal
board.
After a period of TV
receiving, the unit
will be switched off.
Check if the TV signal is inputted properly under such phenomenon.
Click the “MENU” key of the remote control and check for correct
selection of the timed shutdown item.
Check if it is caused by the computer connected. If a computer is
connected, set the power-saving setting of the computer to “off”.
No color image
Check for proper signal source inputted currently.
Open the menu system and click the remote control’s “MENU” key.
Check for correct selection of the items concerning images.
Switch off. Open the cover of the unit and check for proper contact of
the data connection wire between the data conversion board and the
display screen.
Malfunction of
remote control
Check the polarity of the batteries placed in the remote control.
Check if the batteries in the remote control are effective.
Check the transmitting window of the remote control and the remote
sensor window of the unit
Others
Even the image and sound of the unit are normal, the enclosure will
expand and sounds will be given once in a while along with the
variation of the ambient temperature. This is normal.
