Alignments
EN 90
A02U AA
8.
8.2.2
Focus alignment
The LOT has the following outline:
–
Focus 1 (F1)= Static alignment (black wire).
–
Focus 2 (F2)= Dynamic alignment (red wire).
1.
Use an external video pattern generator to input a "circle"
or "crosshatch" test pattern to the set.
2.
Choose "Weak" picture mode with the (Smart) "Picture"
button on the remote control transmitter.
3.
Adjust the "dynamic focus 2" potentiometer (in the middle
on the LOT) until the horizontal lines at the centre of the
screen are of minimum width without introducing a visible
haze.
4.
Adjust the "static focus 1" potentiometer (highest of the
LOT) until the horizontal lines at the sides of the screen are
of minimum width without introducing a visible haze.
5.
Repeat these two steps to achieve the best result.
8.3
Software Alignments
Put the set in the SAM (see the "Service Modes, Error Codes
and Fault Finding" section). The SAM menu will now appear on
the screen. The different alignment parameters are described
further on.
Notes:
•
All changes to menu items and alignments must be stored
manually.
•
If an empty EAROM (permanent memory) is detected, all
settings are set to pre-programmed default values, so the
set must be re-aligned.
8.3.1
TUNER
IF PLL OFFSET
No adjustments needed: default value is "35".
If the mentioned default value does not give the required result,
use the following alignment method:
1.
Set an external pattern generator to a crosshatch video
signal and connect the RF output to the aerial input of the
TV. Set the amplitude to 10 mV and the frequency to 61.25
MHz. Use system NTSC M if possible, otherwise match the
system of your generator with the received signal in the set.
–
For "Negative modulation", the sound signal must be
a non-modulated FM signal.
–
For "Positive modulation", the video signal must have
high modulation (100% or above).
2.
Put the set in the SAM mode.
3.
Select via the TUNER menu, the IF-PLL OFFSET sub-
menu.
4.
Measure and align:
–
For "Negative modulation", on MONITOR OUT
(audio): Adjust IF-PLL OFFSET until the largest Signal
Noise Ratio (SNR) is reached.
–
For "Positive modulation", on MONITOR OUT (video):
Adjust IF-PLL OFFSET until you get minimal V-sync
disturbance.
AGC
1.
Set an external pattern generator to a color bar video signal
and connect the RF output to the aerial input of the TV. Set
the amplitude to 10 mV and the frequency to 61.25 MHz.
Use system NTSC M if possible, otherwise match the
system of your generator with the received signal in the set.
2.
Put the set in the SAM mode.
3.
Select via the TUNER menu, the AGC sub-menu.
4.
Connect a DC multi-meter to pin 1 of the tuner (item 1200
on the LSP).
5.
Adjust the AGC until the voltage at pin 1 of the tuner is 3.3
V (+/- 0.1 V). The value can be incremented or
decremented by pressing the right/left CURSOR button on
the RC.
6.
After alignment, save the value(s) with the STORE
command in the SAM main menu.
2nd AGC
Same alignment as AGC-alignment however for a second
tuner (when applicable, e.g. PIP or DW).
8.3.2
WHITE TONE
In the WHITE TONE sub menu, the color values for the
different color temperatures can be aligned.
The color temperature mode (NORMAL, DELTA COOL,
DELTA WARM) can be selected per color (R, G, and B) with
the RIGHT/LEFT cursor keys. The mode or value can be
changed with the UP/DOWN cursor keys.
First, the values for the NORMAL color temperature must be
aligned. Then the offset values for the DELTA COOL and
DELTA WARM mode can be aligned. Note that the alignment
values are non-linear.
Alignment
No adjustments needed. Use the given default values:
Table 8-1 White tone alignment (default values)
If the mentioned default values do not give the required result,
use the following alignment method:
1.
Set the external pattern generator to a 100% white pattern,
and connect the RF output to the aerial input of the TV. Set
the amplitude at least 1 mV_rms (60 dBuV) and the
frequency to 61.25 MHz. Use system NTSC M if possible,
otherwise match the system of your generator with the
received signal in the set.
2.
Set "Smart Picture" to "Weak".
3.
Set "Dynamic NR" to "off" (accessible via MENU ->
Features).
4.
Put the set in the SAM mode.
5.
Set NORMAL GREEN to "32".
6.
Measure with the color analyzer (Minolta CA100 Color
Analyzer or equivalent), calibrated with the spectra, on the
centre of the screen.
7.
Adjust with the cursor left/right command the Red and Blue
register for the right xy-coordinates (see next table).
8.
Repeat the white tone adjustment also for the color
temperatures COOL and WARM.
Parameter
27PT83
02/37
32PT83
02/37
30PW8402/37
34PW8402/37
Normal Red
10
0
0
0
Normal Green
3
-8
-7
-8
Normal Blue
2
1
-6
1
Red BL Offset
7
7
7
7
Green BL Offset
7
7
7
7
Blue BL Offset
7
7
7
7
Delta Cool Red
0
0
0
0
Delta Cool Green
2
3
2
2
Delta Cool Blue
11
12
12
10
Delta Warm Red
0
0
0
0
Delta Warm Green
-7
-6
-8
-7
Delta Warm Blue
-22
-20
-24
-21
