21HT-15 (serv.man2). Part 1 - Text (1-12) - Sharp TV Service Manual (repair manual). Page 10

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10
21HT-15H
••••
 GEOMETRY ADJUSTMENT PROCEDURE 
1.  Receive  Philips. 
2.  Go into service mode (refer to “How to access service mode” section). 
3.  Use 
CH
 / 
CH
 buttons in order to select the required adjust. 
4. 
Re-set the TV with the mains switch button (
) to store the adjustment and exit service mode.
 
 
 
 
V-LIN (Vertical slope adjust)
 
 
a)  Use 
 
 / 
 
 buttons to move the picture. 
 
b)  Adjust the vertical linearity to obtain picture centring  (fig. 6). 
 
 
 
 
V-AMP
 (Vertical amplitude adjust)
 
 
a) 
When
 
 
 button is pressed, vertical size of picture increases.  
 
b) 
When
 
 
 button is pressed, vertical size of picture decreases 
 
c)  Adjust the vertical amplitude to obtain picture overscan (Fig. 7). 
 
 
 
 
 
V-CENT (Vertical shift adjust) 
 
a)  When
 
 
 button is pressed, picture moves down. 
 
b) 
When  
 
 button is pressed, picture moves up. 
 
c) 
 Adjust the vertical shift  to obtain picture centring (Fig. 8). 
 
 
 
 
H-CENT (Horizontal shift adjust) 
 
d)  When
 
 
 button is pressed, picture moves to right. 
  
e) 
When  
 
 button is pressed, picture moves to left. 
 
f) 
 Adjust the vertical shift to obtain picture centring (Fig. 9). 
 
 
 
 
 
    Fig. 6 
 
 
 
   Fig. 7
 
 
 
 
Fig. 8
 
 
 
 
   Fig. 9
 
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