Hitachi p50x902 User Guide

Page of 70
52
Reception Problems
IGNITION NOISE:
Black spots or horizontal streaks may appear, picture may flutter or drift. Usually caused 
by  interference  from  automobile  ignition  systems,  neon  lamps,  electrical  drills,  and  other 
electrical appliances.
GHOSTS:
Ghosts are caused by the television signal following two paths. One is the direct path and 
the other is reflected from tall buildings, hills or some other objects. Changing the direction 
or position of the antenna may improve reception. Ghosting may also be caused by defects 
in the antenna system such as unshielded leads or connecting several sets to the same 
antenna without using multiple antenna couplers.
SNOW:
If your receiver is located in the fringe area of a television station where the signal is weak, 
your picture may be marred by the appearance of small dots. When the signal is extremely 
weak, it may be necessary to install a special antenna to improve the picture.
RADIO FREQUENCY INTERFERENCE:
The interference produces moving ripples or diagonal streaks, and in some cases, causes 
loss of contrast in the picture.
PREVENTION OF AN OBSTACLE TO RADIO RECEIVERS
This television has been designed pursuant to the FCC class B Rules. This is to prevent a 
problem to Radio receivers.  If this television causes a problem to Radio receivers, then take 
the following steps:
Keep the television away from Radio.
• 
Adjust Radio antennas in order for the television not to receive interference.
• 
The antenna cable of Radio should be kept away from the television.
• 
Use a coaxial cable for antenna.
• 
You can check if this television influences Radio receivers by turning off all other equipment other than the television. If you 
find a problem receiving Radio when using the television, check the instructions mentioned above.
BLOCK NOISE or FREEZE (DIGITAL INPUT):
Fuzzy  blocks  may  appear  in  some  area  or  the  whole  area  of  the  screen. This  is  usually 
caused by interference from automobile ignition systems, neon lamps, electrical drills, ghost-
ing of the image and lost or weak receiving signals.
BLACK SCREEN:
When using an antenna, weak signals will display a black screen. It may be necessary to 
upgrade your antenna.
NOTE
The TV set can generate sound distortion in external devices such as a radio. Please separate radio equipment 
from the TV set to a considerable distance.