Sharp 28JF-76E Service Manual page 8

28JF-76E
The following geometry adjustments can be carried out. Detailed instructions on how to execute these are given on the
following pages:
Horizontal
• Horizontal shift
• Horizontal size
• Pin phase
• Pin amplitude
• Vertical angle
• Vertical bow
• Upper corner correction
• Lower corner correction
• Extreme corner correction
Just in case the TV set requires a full geometry adjustment, please proceed first with Vertical according to the above
order, and after that, adjust Horizontal according to the above order.
Geometry Adjustments
Horizontal Shift
Adjust the Horizontal shift so that the picture is centred.
The effect of this adjustment is shown in Figure 3.
• When the volume up button is pressed, the picture moves to the left.
• When the volume down button is pressed, the picture moves to the right.
• Press the stand-by button on the remote control to store.
Horizontal size
Adjust the Horizontal size so that 8% over-scan is achieved.
The effect of this adjustment is shown in Figure 4.
• When the volume up button is pressed, horizontal scanning increases.
• When the volume down button is pressed, horizontal scanning decreases.
• Press the stand-by button on the remote control to store.
Pin phase
Adjust the Pin phase so that the picture is symmetrical top and bottom.
The effect of this adjustment is shown in Figure 5.
• When the volume up button is pressed, side pincushion changes.
• When the volume down button is pressed, side pincushion changes.
• Press the stand-by button on the remote control to store.
Pin amplitude
Adjust the Pin amplitude so that the picture is centred.
The effect of this adjustment is shown in Figure 6.
• When the volume up button is pressed, side pincushion changes
from pincushion to barrel shape.
Vertical
• Vertical size
• Vertical S-correction
• Vertical shift
• Vertical linearity
8
Figure 3
Figure 4
Figure 5
Figure 6