Philips L01.1L AC, Service Manual

Alignments

EN 69

L01.1L AC

8.

AGC (AGC take over point)
Set the external pattern generator to a color bar video signal 
and connect the RF output to aerial input. Set amplitude to 10 
mV and set frequency to 61.25 MHz (channel 3).
Connect a  DC multimeter to pin 1 of the tuner (item 1000 on 
the main chassis).
1.

Activate the SDAM. 

2.

Go to the TUNER sub menu.

3.

Select AGC with the UP/DOWN cursor keys.

4.

Adjust the AGC-value (default value is 27) with the LEFT/
RIGHT cursor keys until the voltage at pin 1 of the tuner lies 
between 3.8 and 2.3 V.

5.

Return to the SDAM via the MENU key and Switch the set 
to STANDBY.

SL (Slicing Level)
Forced slicing level for vertical sync.
0 : slicing level dependent on noise detector
1 : fixed slicing level of 70%

8.3.3

White Tone

Figure 8-5 White tone alignment menu  

 
In the WHITE TONE sub menu, the values of the black cut off 
level can be adjusted. Normally, no alignment is needed for the 
WHITE TONE. You can use the given default values.
The color temperature NORMAL RED, NORMAL GREEN and 
NARMAL BLUE can be selected with the UP/DOWN RIGHT/
LEFT cursor keys. The value can be changed with the LEFT/
RIGHT cursor keys. After alignment, switch the set to standby, 
in order to store the alignments value.
 
Default settings:
NORMAL (color temperature = 9600 K):
•

NORMAL R = 40

•

NORMAL G = 40

•

NORMAL B = 40

8.3.4

Geometry

The geometry alignments menu contains several items to align 
the set, in order to obtain a correct picture geometry.
Connect an external video pattern generator to the aerial input 
of the TV-set and  input a crosshatch test pattern. Set the 
generator amplitude to at least 1 mV and set frequency to 61.25 
MHz (channel 3).
1.

Set 'Smart Picture' to NATURAL (or MOVIES).

2.

Activate the SDAM menu (see chapter 5). 

3.

Go to the GEOMETRY sub menu.  

4.

Choose HORIZONTAL or VERTICAL alignment

Now the following alignments can be performed:

Figure 8-6 Geometry alignments  

Figure 8-7 Horizontal alignment menu  

Horizontal:
•

Horizontal Parallelogram (HP)
Align straight vertical lines in the top and the bottom; 
vertical rotation around the center.

•

Horizontal Bow (HB)
Align straight horizontal lines in the top and the bottom; 
horizontal rotation around the center.

•

Horizontal Shift (HSH)
Align the horizontal center of the picture to the horizontal 
center of the CRT.

NORMAL BLUE

XX 

 NORMAL GREEN

XX 

S 

  NORMAL RED

XX 

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VERT. SLOPE

VERT. SHIFT

VERT. AMPLITUDE

V.S-CORRECTION

HOR. SHIFT

HOR. AMPLITUDE

E/W PARABOLE

UPPER E/W CORNER

LOWER E/W CORNER

E/W TRAPEZIUM

HOR. PARALLELOGRAM

HOR. BOW

HP

XX 

HB

XX 

HSH

XX 

EWW

XX 

EWP

XX 

OCP

XX 

LCP

XX 

EWT

XX 

S 

HOR IZONTAL 

 > 

VERTICAL  

>

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