Service manual

3-15
6) VSB PART
When the screen is not
displayed or distorted
Is the channel
on air selected?
Did you
check the clock used at
IC146 and IC156?
Did you
check the power used
at each part by referring to
the block diagram?
Did you select the
channel on air?
Check the clock by referring
to VSB section of 3.4 Wiring
diagram and Waveform.
See ‘Video’
of 3.3
Troubleshooting guide
Check the power
LED103 : Flashing
LED104 : On
Check the antenna
cable is correctly
connected, or change
the direction of the
antenna
LED103 : On
LED104 : Off
LED103 : Off
LED104 : On