Service manual

Alignments
1. Connect an external video pattern generator to the aerial input of the TV set with
a crosshatch test pattern.
2. Use default settings as mentioned in paragraph 8.1.
3. Activate the SAM menu (see chapter 5).
4. Go to sub menu GEOMETRY. Now the following alignments can be performed:
• Vertical slope (VER. SLOPE) Align the vertical center of the picture to the
vertical center of the CRT. This is the first alignment to be performed of
the vertical alignments. For an easy alignment set SERV.BLK to on.
• Service blanking (SERV. BLK) Switch the blanking of the lower half of the
screen on/off (to be used in combination with the vertical slope alignment).
• Vertical amplitude alignment Align the vertical amplitude with
potentiometer R3603 on the LSP (see Fig. 8-1) so that the complete test
pattern is visible.
• Vertical shift alignment. Align the vertical centering with potentiometer
R3609 on the LSP (see Fig. 8-1) so that the test pattern is located
vertically in the middle. Repeat the “vertical amplitude” alignment if
necessary.
• Horizontal shift (HOR. SHIFT) [*] Align the horizontal center of the picture
to the horizontal center of the CRT.
• Horizontal bow (HOR. BOW). Align straight horizontal lines in the top and
the bottom, horizontal rotation around the center.
• Horizontal parallelogram (HOR. PARALLEL) . Align straight vertical lines
in the top and the bottom, vertical rotation around the center.
• East West width (EW. WIDTH) [*] Align the picture width until the complete
test pattern is visible (similar to Horizontal Amplitude).
• East West parabola (EW. PARA) [*] Align straight vertical lines at the
sides of the screen.