TROUBLESHOOTING (continued)

Symptoms That Seemingly Appear to be Failures (continued)

Symptom

Point to check

See page

There are locations on the screen that are different from • High-precision technology is used to manufacture the plasma

the periphery (*).

display panel, However in some cases, there are minor defects in

 

*Points that do not light, points with brightness different

some parts of the screen. Please note that this is not a

from that of the periphery, points with color different from

malfunction.

 

that of the periphery, etc.

 

 

Vertical stripes appear, depending on the screen contents. • The plasma display panel is lighting the phosphors by the discharge of internal radiation. Depending on the screen

 

contents, in rare cases this may cause vertical stripes to appear

 

because of failure to light. Please note that this is not a

 

 

malfunction.

 

 

 

 

• Coarse horizontal stripes appear in FULL display.

• Adjusting the Clock Phase will reduce the horizontal stripes.

37

 

(RGB input)

 

 

Flickering in the form of horizontal lines oscillating up and • If the direct frequency from the computer is below 85Hz, try a

down.

higher frequency (upper limit 85Hz). There may be a slight

 

(PC INPUT MODE only)

attenuation of the current image.

38

 

 

Try turning the Vertical Filter On. For this case however, the vertical resolution will drop.

• The top of the monitor heats up.

• When used for long periods of time, the top of the monitor may

 

heat up. This is not a malfunction.

 

 

Text characters are displayed with varying thicknesses. • The thicknesses of characters and lines may vary if images with

a vertical resolution greater than 512 lines are displayed;

however, this is not a malfunction.

 

The screen becomes dark and the images cannnot be seen • This sometimes occurs when a component output VTR such as the

during VTR special playback (fast forward, rewind)

480i is connected.

 

 

This is not a malfunction; therefore, please take note that this may

 

occer. When it does occur, change to composite output,or S.video

 

 

output.

 

During multi picture mode, sub pictures are not displayed. • Sub pictures image might not be able to be displayed, depending

 

on the combination.

28

 

(Reter to the table of “2 picture mode” and “4 picture mode”)

 

 

 

 

• The screen display sizes are not switched.

• The screen dicplay size is fixed at “Full” as receiving 1080i/60Hz,

 

1080i/50Hz, and 720p.

 

 

 

 

 

• Images from AV6 (HDMI) are not displayed.

• Check the cable and output format of connecting device.

14

 

(Reter to “Connecting to an Audio Visual Device”)

 

 

 

 

 

• Images from Photo Input are not displayed.

• Check the connecting device and image format.

30

 

(Reter to “Photo Input Display”)

 

 

 

 

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ENGLISH

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Hitachi 42PD7800, 32PD7800 user manual English