EN 1048.EM5.1EElectrical Alignments
Notes:
?All changes to menu items and alignments are stored
automatically, except the option codes. They must be
stored manually.
?If the OPTION CODES have been changed and stored,
max.the set has to be switched "OFF" and "ON" using the mains
switch to activate the new settings (when switching via
VCUTOFF [VDC]
Standby, the option code settings are NOT read by the
microprocessor).
0V Ref.
?If an empty EAROM (permanent memory) is detected, all CL 06532130_014.eps
131000settings are set to pre-programmed default values.
Figure 8-2 Waveform Vg2 alignment8.3.2 GENERAL
8.2.2 Focus alignmentVG2 TEST PATTERN
In this sub-menu, you can turn "On" the OSD feedback for the
Notes:Vg2 alignment (see chapter 8.2.1).
?Tune the set to a "circle with crosshatch" test pattern (use
an external video pattern generator).ADJUST PEAK WHITE LIMITER
?Choose picture mode "NATURAL" with the "SMART Fixed setting: "9".
PICTURE" button on the remote control transmitter.
?ELDOR LOT outline:EHT COMPENSATION
- Focus 1 (F1) = Static alignment (black wire).Enter value "9" for the 28, 29 and 32 inch picture tubes
- Focus 2 (F2) = Dynamic alignment (red wire).Enter value "10" for the 36 inch picture tubes.
Focus method for Philips 32 inch tube with bleeder gun SOFT CLIPPER
You can recognize a CRT with bleeder gun by its type number: Fixed setting: Pwl + 0%
?W76ERF052X044= with bleeder gun
?W76ERF042X044= with standard gun.
LUMA GAIN
You can also recognize it by the ceramic rectangular plate (this Fixed setting: 2.
is the bleeder resistance) you will see inside the gun (viewed
from above). IF AFC
1. Start the alignment with the STATIC focus (upper Supply, via an external video generator (e.g. PM5518), a TV
signal with strength of at least 1 mV and a frequency of 475.25
potmeter) turned to the left and the DYNAMIC focus MHz. Use system BG if possible, otherwise match the system
(middle potmeter) to the right.
2. Adjust the DYNAMIC focus until the horizontal lines at the of your generator with the received signal in the set.
centre of the screen have minimum width, without
introducing a visible haze.Alignment procedure:
1. Go to the user "Installation" menu.
3. Adjust the STATIC focus until the vertical lines at the sides 2. Select "Manual Installation".
of the screen have minimum width, without introducing a
visible haze. 3. Tune the TV-set to the system and frequency described
above via "Search" - "475" - "OK".
4. Adjust the DYNAMIC focus until the horizontal lines at the 4. If the frequency, showed in the line "Fine tune", is between
centre of the screen have minimum width, without
475.18 MHz and 475.31 MHz, you do not need to re-adjust
introducing a visible haze.the "IF AFC".
5. Check overall spot performance and repeat steps 3 and 4
to achieve the best result.5. If not, adjust the frequency in the "Fine tune" line to 475.25
MHz and "Store" the program (this is very important
because this will disable the AFC algorithm).
Focus method for all other tubes 6. Now go to the SAM and select ALIGNMENTS - GENERAL
1. Start with the STATIC and DYNAMIC focus potentiometers - IF AFC.
on the LOT at midway.7. During the IF AFC parameter adjustment, one can see
2. Adjust the STATIC focus until the vertical lines at the sides OSD feedback in the top of the screen.
of the screen have minimum width, without introducing a 8. This OSD feedback can give 4 kind of messages:
visible haze.
3. Adjust the DYNAMIC focus until the horizontal lines at the Table 8-1 OSD feedback of AFC alignment
centre of the screen have minimum width, without
introducing a visible haze.AFC-window AFC-frequency vs. reference
4. Check overall spot performance and repeat steps 2 and 3
to achieve the best result: a compromise between minimal OutHigh
visible haze at the middle of the screen and sharp lines at InHigh
the edges of the screen.InLow
OutLow
8.3Software Alignments
8.3.1 Introduction1. The first item (IN or OUT) informs you whether you are in
or out the AFC-window.
With the software alignments, it is possible to align the 2. The second item (HIGH or LOW) informs you about
Geometry, White Tone, and Tuner IF settings.whether the AFC-frequency is too high or too low.
Put the set in the SAM (see chapter 5). The SAM menu will now 3. First, you must align the IF AFC parameter such that you
appear on the screen. Select, via ALIGNMENTS, one of the come into the AFC-window (= IN).
sub-menus. They are explained below in the sequence of the 4. Then you must look for the point where the IF AFC
sub-menus.parameter changes from HIGH to LOW. This level is the
value you are looking for. |
ACEC
