Rotate clockwise to increase the brightness; counterclockwise reduces the brightness. It is to be
used in conjunction with the contrast control since its movement will also have an effect on
picture contrast.
NOTE:
The brightness control setting for the picture shown in Figure 2 is set too high. Set the
control below this level.
FIG. 2
CONTRAST
Adjust the picture for best distinction between the black and white shading. Your own vision is
the best judge in setting this control properly.
NOTE:
The contrast control setting for the picture shown in Figure 3 is set too high. Set the
control below this level.
FIG. 3
HORIZONTAL HOLD CONTROL
If the picture appears to have a tendency to move across the screen, or if it assumes a broken
streaked appearance, as indicated in Figure 4, it should be readjusted to a point where the pictures
remain locked in properly on all channels.
FIG. 4
VERTICAL HOLD CONTROL
This control is used in correcting for vertical movement, or rolling up or down. Set control to
lock picture. (Fig. 5)
FIG. 5
The most effective means of reducing interference to a minimum has been built into your Zenith Television receiver.
Occasionally however, the picture may be affected by electrical interference or reflections.
AUTO IGNITION AND APPLIANCES
Automobile ignition, electrical appliances, etc., cause a speckled streaked appearing picture as
shown. This condition is most noticeable in weak signal areas. (Fig. 6.)
FIG. 6
DIATHERMY
Diathermy produces a distinctive herringbone pattern and one or two horizontal bands across the
face of the picture. (Fig. 7). It can sometimes be reduced or eliminated by the insertion of a filter
trap at the antenna terminals.
FIG. 7
[5]
Page 5 of 8
Zenith Television Receiver Operating Manual, by Anonymous.
8/8/2009
http://www.yesterdayimage.com/27832-h/27832-h/27832-h.htm
