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EN 108
8.
EM5A P/M
max.
0V Ref.
Figure 8-2 Waveform Vg2 alignment
Method 2 (without oscilloscope)
Note: Use this "software driven" alignment only in cases when
there is no oscilloscope available, because of the high spread
and tolerances.
1. Activate the SAM with the RC-code '062596' directly
followed by 'OSD [i+]'.
2. Select 'Alignments'.
3. Select the 'General' sub-menu.
4. Set 'Vg2 Test Pattern' to 'On'
5. You will now get OSD feedback during Vg2 alignment.
6. First, turn the Vg2 potmeter on the LOT to the left. OSD
feedback will show 'Out/High'.
7. Turn the Vg2 potmeter slowly clockwise until the OSD
toggles between 'In/High' and 'In/ Low'. This is the correct
value.
8.2.2
Focus Alignment
Notes:
•
Tune the set to a "circle with crosshatch" test pattern (use
an external video pattern generator).
•
Choose picture mode 'NATURAL' with the 'SMART
PICTURE' button on the remote control transmitter.
•
ELDOR LOT outline:
–
Focus 1 (F1) = Static alignment (black wire).
–
Focus 2 (F2) = Dynamic alignment (red wire).
Focus method for Philips 32" tube with bleeder gun
You can recognize a CRT with bleeder gun by its type number:
•
W76ERF052X044= with bleeder gun
•
W76ERF042X044= with standard gun.
A second recognition point is a white ceramic rectangular plate
you will see inside the gun (viewed from above.)
1. Start the alignment with the STATIC focus (upper
potmeter) turned to the left and the DYNAMIC focus
(middle potmeter) to the right.
2. Adjust the DYNAMIC focus until the horizontal lines at the
centre of the screen have minimum width.
3. Adjust the STATIC focus until the vertical lines at the
corners of the screen have minimum width.
4. Adjust the DYNAMIC focus until the horizontal lines at the
centre of the screen have minimum width.
5. Check overall spot performance and repeat steps 3 and 4
to achieve the best result.
Focus method for all other tubes
1. Start with the STATIC and DYNAMIC focus potentiometers
on the LOT at midway.
2. Adjust the STATIC focus until the vertical lines at 1/4 from
east and west, at the height of the centre line, has minimum
width without introducing a visible haze.
3. Adjust the DYNAMIC focus until the horizontal line at the
centre of the screen has minimum width without
introducing a visible haze.
4. Check overall spot performance and repeat steps 2 and 3
to achieve the best result: a compromise between minimal
Alignments
V
[V
]
CUTOFF
DC
CL 06532130_014.eps
visible haze at the middle of the screen and sharp lines at
the edges of the screen.
8.3
Software Alignments
8.3.1
Introduction
With the software alignments, it is possible to align the
Geometry, White Tone, and Tuner IF settings.
Put the set in the SAM (see "Service Modes, Error Codes and
Fault Finding"). The SAM menu will now appear on the screen.
131000
Select, via 'Alignments', one of the sub-menus. They are
explained below in the sequence of the sub-menus.
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, the
set has to be switched 'OFF' and 'ON' using the mains
switch to activate the new settings (when switching via
Standby, the option code settings are NOT read by the
microprocessor).
•
If an empty EAROM (permanent memory) is detected, all
settings are set to pre-programmed default values.
8.3.2
General
Vg2 Test Pattern
In this sub-menu, you can turn 'On' the OSD feedback for the
Vg2 alignment (see chapter "Vg2 Adjustment").
Adjust Peak White Limiter
Fixed setting: 4.
EHT compensation
Enter value '9' for the 28" and 32", '12' for the 29", or '10' for the
36" picture tubes.
Soft clipper
Fixed setting: Pwl + 0%
Luma gain
Fixed setting: 2.
IF AFC
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
MHz. Use system BG if possible, otherwise match the system
of your generator with the received signal in the set.
Alignment procedure:
1. Go to the 'Installation' menu.
2. Select 'Manual installation'.
3. Tune the TV-set to the system and frequency described
above via 'Search' - '475' - 'OK'.
4. If the frequency, showed in the line 'Fine tune', is between
475.18 MHz and 475.31 MHz, you do not need to re-adjust
the 'IF AFC'.
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).
6. Now go to the SAM and select 'Alignments' - 'General' - 'IF
AFC'.
7. During the 'IF AFC'-parameter adjustment, one can see
OSD feedback in the top of the screen.
8. This OSD feedback can give 4 kind of messages:
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