Abgleich / Alignment
DIGI 100
2 - 6
GRUNDIG Service
Use the FOC control on the picture tube panel to adjust the
vertical lines about 5 cm to the right and left picture border
for minimum horizontal width.
Use the FOC control on the picture tube panel to adjust the
horizontal lines in the picture centre for minimum vertical
width. When this is done, use the focus control on the focus
board to adjust the vertical lines about 5 cm to the right and
left picture border for mimimum horizontal width.
Use the FOCUS 1 control on the focus block to adjust the
horizontal lines in the picture centre for minimum vertical
width. The upper border sharpness must not be worse than
the centre sharpness - set to average value if necessary.
When this is done, use the FOCUS 2 control on the focus
block to adjust the vertical lines about 5 cm to the right and
left picture border for minimum horizontal width.
Units without focus block:
Use the SG control (right control on the regulating section)
on the picture tube panel to adjust 170V
±
2.5V.
Units with focus block:
Use the "SCREEN" (bottom control on the focus block) to
adjust 170V
±
2.5V.
Check for equal impulse width of the oscillograms and
correct if necessary using the coil L53574.
Re-adjust the picture width according to the test pattern.
Ajust to IF Type built into the set.
National, Multi 8, Multi 9.
Feed in a convergence test pattern.
On 16:9 units, set the picture format to 16:9.
Contrast:
Maximum.
Set the brightness so that the black test pattern background
just brightens.
Feed in a convergence test pattern.
On 16:9 units, set the picture format to 16:9.
Contrast:
Maximum.
Set the brightness so that the black test pattern background
just brightens.
Feed in a convergence test pattern.
On 16:9 units, set the picture format to 16:9.
Contrast:
Maximum.
Set the brightness so that the black test pattern background
just brightens.
Feed in a black raster.
Adjust the picture screen brightness so the the grey area
just darkens.
Switch the unit to AV mode.
High-impedance voltmeter:
Test point R, G, B
(picture tube plate).
Determine the test point with the highest voltage level.
The bridge coil L53574 is adjusted during production and
should not be re-adjusted any more.
Call up the "Screen geometry" menu via "EASY DIALOG" –>
"Installation" (to page 2) –> "Dealer service menu" –>
"8500".
Set the picture width to minimum.
Oscilloscope channel 1: collector T53501.
Oscilloscope channel 2: cathode D53572.
Call up the "IF-Type" menu via "EASY DIALOG" –>
"Installation" (to page 2 / option) –> "Dealer service menu" –>
"8500" –> "Hardware settings".
Alignment
Preparations
Alignment procedure
12. Picture
sharpness
(TV sets without
focus block)
Line sharpness
(TV sets with
focus board)
Line sharpness
(TV sets with
focus block)
13. Screen grid
voltage U
SG
14. Adjustment of
the bridge coil
L53574
15. IF-Type
