Akai LTA-32N658HCP, Service Manual, Page: 41 / 58

3B
Chapter 4: Maintenance Procedure and Examples of Typical
troubleshooting
1. Failure phenomenon: The picture is normal, but OSD has line in it.
The reason and the processing: Check the pin of U7 and pin 95-150 of U1 for
pseudo soldering, and have pseudo soldering touched up.
2. Failure phenomenon: There is no sound but no picture; there is no OSD when start up,
and the back light is bright.
The reason and processing: Check the connecting line to screen, and have it
connect well
3. Failure phenomenon: There are no picture, no sound, and no flower dot in TV mode,
but AV is normal.
The reason and processing: Check the tuner and its peripheral circuits (including
bus and power supply). If the peripheral circuits work well but there is no output from
tuner, then the tuner must failure.
4. Failure phenomenon: LCD television cannot be controlled (including no starting up
with red light on, remote control and local key having no effect, etc).
The reason and processing: LCD television has crash phenomenon, restart after
power off.
5. Failure phenomenon: +5V SB voltage has output, but there are no picture, no sound,
and back light and indicating light are not on.
The reason and processing: Check other groups of voltage; if they have no
outputs, then check Flash to find if it is installed well or damaged.
When you meet the following common problems, you might diagnose and get the
solutions without contacting with the technicians.
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