![Philips 21PT1820/12 Скачать руководство пользователя страница 38](http://html.mh-extra.com/html/philips/21pt1820-12/21pt1820-12_service-manual_293418038.webp)
Alignments
EN 38
TE3.2E CA
8.
Enter the Service Mode and select the GEOMETRY settings.
VS, VP and HP settings carry out standard geometry
adjustments.
VS 16/9 50h setting has to be carried out until 3 cm distance
between upper and lower parts of the screen. Same
adjustments are valid for 60h 16/9 and 4/3.
•
V.S4/3 50h Vertical size property of picture at 50 Hz 4/3
aspect ratio broadcast (default value 10).
•
V.S4/3 Expand 50h Vertical size property of picture at 50
Hz 4/3 Expand aspect ratio broadcast (default value 15).
•
V.S4/3 60h Vertical size property of picture at 60 Hz 4/3
aspect ratio broadcast (default value 7).
•
V.S4/3 Expand 60h Vertical size property of picture at 60
Hz 4/3 Expand 9 aspect ratio broadcast (default value 11).
•
V.P to adjust the vertical position of the picture (default
value 0).
•
H.P to adjust the horizontal position of the picture (default
value 0).
8.2.3
G2 Adjust Menu
In this menu, we will see a comparative display according to the
preset. To adjust the G2, turn the G2 potentiometer on the LOT
until you reach the ':' sign. If the colon is highlighted, adjustment
is achieved ('<' means you have to decrease and '>' means you
have to increase).
Figure 8-3 G2 adjustment menu
8.2.4
Video
Figure 8-4 Video alignment menu
1.
Apply a ‘white' pattern (at 100 IRE)
2.
Set CONTRAST to 70% and BRIGHTNESS and COLOUR
SATURATION in the middle.
3.
Place the colour analyser.
4.
Via R, G, and B, it is possible to modify the 'peak white'.
5.
Adjust to obtain the necessary values for x and y.
•
R (default value = 0)
•
G (default value = 0)
•
B (default value = 0)
1.
Apply a 'dark grey' pattern (at 10 IRE).
2.
Set CONTRAST to 70% and BRIGHTNESS and COLOUR
SATURATION in the middle.
3.
Adjust to obtain the necessary values for x and y by
changing the R CFF and G CFF
•
R CFF (default value = 0)
•
G CFF (default value = 0)
Remark: After the low light alignment it may be necessary to
check and to re-align the high light, and to repeat several times
the procedure to obtain a good alignment for both low and high
light.
8.2.5
Tuner / IF
Figure 8-5 Tuner alignment menu
8.2.6
AGC Adjustment
Select the AGC parameter and adjust to 40 values.
Select the parameters, and adjust the settings until the ':'
indicator (displayed as >:< ) turns into red by pressing < and >
on the remote control.
PIF adjustment for BG/DK/L systems:
1.
Apply a 38.9 MHz PAL BG signal.
2.
Enter the Service Mode.
3.
Select TUNE IF.
4.
Choose the PIF C and PIF F items, and adjust the settings
until the ':' indicator (displayed as >:< ) turns into red by
pressing < and > on the remote control.
•
PIF C (default value = 0)
•
PIF F (default value = 0)
PIF adjustment for L' system:
1.
Apply a 33.9 MHz SECAM L' signal.
2.
Enter the Service Mode.
3.
Select TUNE IF.
4.
Choose the PIF COARSE L' and PIF FINE L' items, and
adjust the settings until the ':' indicator (displayed as >:< )
turns into red by pressing < and > on the remote control.
•
PIF CL' (default value = 0)
•
PIF FL' (default value = 0)
F_15850_008.eps
160805
F_15850_009.eps
160805
F_15850_010.eps
160805
<