Hitachi Ultravision P42T501 Operating Manual page 64

Troubleshooting
1. Plasma Television Troubleshooting
No. Items
Buzzing sound from Plasma
1
display panel.
2
Infrared interference
3 Bright and dark spots
4
Picture Image
Display panel surface
5
temperature is too high.
6
Plasma Surface
7
Transportation
8
Granular spots
High temperature
9
environment
10 Operation
11 Storage
12 Power ON or OFF
13 Lip sync
Control Buttons
14
Response Delay
64
Notes
A buzzing sound may be heard when the plasma television is turned on in a very quiet
room. This is due to the plasma panel drive circuit when it is functioning. The buzzing
sound is normal and is not a malfunction.
Some infrared rays are emitted from the plasma television panel that might affect the
operation of other infrared controlling equipment.
High precision technology is used to manufacture the plasma television. But there
maybe points that do not illuminate, points that are too bright, and points with color
different from that of the periphery. Please note that this is not a malfunction.
In some cases, residual images may remain after the short term display of still images
when the picture changes.
The plasma display panel display images by means of electrical discharges inside the
panel. This may cause the temperature of the panel surface to increase. Please note that
this is not a malfunction.
A reinforced glass filter is installed over the plasma panel surface. A strong impact to
the front panel risk a danger of glass breakage.
Please transport the plasma television in it's packing box and placed in an upright
position. Do not transport the plasma television in a horizontal position. This increases
the posibility of panel breakage and pixel failure.
When a screen is seen at point-blank range, a random fine grain may be visible in the
dark areas of the picture.
High temperature affect the electric discharge/luminescence characteristic of the PDP
panel. Do not place the plasma television in high temperature environments.
Operating altitude: 700 to 1,114hPa (9,676ft to -2,484ft). Operating temperature: 41°F
to 95°F.
Storage altitude: 300 to 1,114hPa (31,912ft to -2,484ft). Storage temperature: 5°F to
140°F
Repeatedly turning the plasma television Power ON and OFF at short intervals may
result in failure of the television.
The on-screen motion of an actor's lips or other moving object may not be in sync with
the associated audio heard from the TV's speakers. This is caused by timing differences
in the broadcast signal or DVD content and is not caused by a defect in the television.
There's a few seconds response delay on the control buttons (Control panel or R/C) after
the TV is turned ON; due to TV start-up routine. Please note that this is not a TV malfunction.