Specifications
Electrical Alignments
GB 89EM3E 8.
Soft clipper
Fixed setting:Pwl + 0%
Luma gain
Fixed setting:1
IF AFC
Supply, via an external video generator (e.g. PM5518), a TV
signal with a signal 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 don't 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. This OSD
feedback can give 4 kind of messages:
Figure 8-7
The first item (‘In’ or ‘Out’) informs you whether you are in or
out the AFC-window.
The second item (‘High’ or ‘Low’) informs you about whether
the AFC-frequency is too high or too low.
1. First you must align the 'IF AFC'-parameter such that you
come into the AFC-window (= 'In')
2. Then you must look for the point where the 'IF AFC'-
parameter changes from ‘High’ to ‘Low’. This level is the
value you are looking for.
3. After adjustment, 'Store' the value.
4. Now return to the 'Installation' menu.
5. Select 'Manual Installation' - 'Search' - '475' - 'OK' and
'Store'. This will set the AFC 'on' again.
Service tip: If you do not trust the frequency accuracy of your
service generator, connect it to a ‘good’ TV set and check it
with the 'Fine tune'-line.
Tuner AGC
1. Set the external pattern generator to a colour bar video
signal and connect the RF output to the aerial input. Set
the amplitude to 10 mV and set the frequency to 475.25
MHz.
2. Connect a DC multimeter between pin 1 and the
shielding of the Tuner (item 1200 on the LSP).
3. Adjust the ‘TUNER AGC’ value (default value is 25) with
the LEFT/RIGHT cursor keys until the voltage at pin 1 of
the tuner lies between 3.8 and 2.3 V.
4. ‘Store’ the alignment.
Blend intensity
Use this alignment when you replace the microcontroller or
the HOP. It aligns the level of transparency of the menu-
picture blended into the main-picture.
1. Position the BRIGHTNESS, CONTRAST and COLOUR
setting in the middle position (picture-menu).
2. Apply a signal with a 100 % white video-pattern.
3. Connect an oscilloscope to pin 8 of connector 1298 of the
CRT panel and measure the Red output level.
4. Align the 'Blend intensity' parameter such, that the
blended signal is 65 % of the black-white amplitude. In
practice this is about 1.3 V (blended signal) versus 2 V
(full white signal).
5. The parameter can be adjusted in between 0 and 31.
Adjust Peak White Limiter
Enter value ‘4’ for all picture tubes.
Vg2 Test Pattern
In this sub-menu, you can turn ‘On’ the OSD feedback for the
Vg2 alignment (see chapter 8.2.1).
8.3.3 'Normal Geometry' alignments
Introduction
Use for all geometry alignments, an external pattern
generator with a geometry pattern (e.g. crosshatch).
See figure below for the correct alignments.
Figure 8-8
Warning: The use of the 'Internal Test Pattern' will, at this
moment, lead to a mis-alignment of the picture geometry. So
use an external generator with a geometry pattern (e.g.
$)&ZLQGRZ $)&IUHTXHQF\YVUHIHUHQFH
In Low
CL 16532044_093.pdf
120601
CL 16532044_022.eps
140501
1
2
3
4
5
6
7
8
9
10
11
12
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