Before Calling For Service - Sharp SX-51A7 Operation Manual

Before Calling for Service
The following conditions do not always denote trouble. Therefore, perform the checks described
below before calling for service.
If the cause of the problem cannot be corrected by the use of this guide, pull the power plug
from the electric outlet, and call for service.
[7 Problems
1
Checking Points
I No Sound
l
Check if the power plug is disconnected from the
I No Picture
electrical outlet.
Check if the Power on/off button is in the off
position (power supply is interrupted).
Check if child lock has been set (see page 22).
I No Picture
l
Check that the brightness or Contrast control has
not been completely turned down.
I Excessive
l
Check if the aerial wire is disconnected or
noise on
shortcircuited.
picture
l
Check if the tuning control is properly adjusted.
I Bad picture
n Ghost
l
Ghosting is due to reflected waves which are
produced by mountains, large buildings or trees
located nearby. Therefore, try to change the
direction or height of the aerial.
I Spotted
picture
l
Check if the set receives noise produced by motor
cars, trucks or neon signs. Install your aerial in
a place as far as possible from roads or neon
signs.
n Striped
picture
l
A striped picture may be due to interference by
other stations or neighbouring television sets. The
interference can be reduced to some extent by
adjusting the direction or height of the aerial.
(If a twinlead type feeder is used, try replacing
it with a coaxial cable).
I
20