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Sony Model KZ-32TS1U // KZ-41TS1U TV Diagnostic Guide
Chapter 1 - Normal Operation
2:35:1 Movie
4x3 TV
16x9 TV
Subtitle Mode
Figure 1-1 - Display of a 2:35:1 Aspect Ratio Movie
Black top and bottom (letterbox) borders
– Even though this TV has a wide 16x9 screen, it is still possible to
receive a picture with top and bottom black bands. Movies are shot in many aspect ratios. The most common
ratios are 4:3, 1.85:1 and 2.35:1. The picture displayed is dependent upon what aspect ratio the movie was shot
in and how different it is from your TV screen’s aspect ratio. Ref Figure 1-1 below:
The 1.85:1 aspect ratio movie will display without the black bands on this 16x9 screen TV (16/9 = 1.77:1 aspect
ratio) because their 1.85 and 1.77 aspect ratios are almost the same. The extra wide 2.35:1 aspect ratio movie
camera is still used in the film industry (mostly overseas). It produces the black borders even on a 16x9 (1.77:1)
TV screen. In this TV, you may choose the “Subtitle” screen mode from the menu to fill the top of the screen,
leaving only a black band at the bottom for the subtitle.
Fan Noise
– Once the TV is turned on, the fan starts. The fan itself makes no noise but air flowing through the
TV does, especially when the TV is enclosed. This low level of air turbulence is normal. The Main CPU monitors
the fan run voltage, rotation and ambient temperature of the power supply. This information is available to the
user from the User Status menu as an OSD (on screen display OK or NG indication). Details such as the
temperature are in the Service Mode (see Section 6).
Video Inversion to prevent border burn in
– After a (undetermined) period of use, some plasma cells will not
be as bright as others, causing an incorrect tint (because one of the red, green or blue plasma cells will darken,
leaving the others bright). Burn in can be prevented from the user menu. From the Screen Saver menu,
“Picture Inversion” may be selected to “clean” the screen (black becomes white and white becomes black
momentarily), restoring normal brightness to the cells.
If this Inversion function were set for AUTOmatic, picture inversion would occur at a specified time every day if
the TV were ON. This picture inversion may alarm a viewer that is not aware that this is normal for this TV.
Picture Shift / Picture Orbit
– To reduce the possibility of a stationary image permanently “burnt” into the
plasma screen phosphor, the picture can be set to automatically move in a circular “orbit” pattern. The menu’s
“picture orbit” can be set to small, medium or large orbit range and its cycle time can be 10, 30, 60 seconds or 5
minutes. Picture Orbit must be turned ON (normally OFF) if the user usually watches constant pattern images
such as movies with borders, stock market scenes, etc.
