Table of Contents
Advertisement
CUC 1822/24/52
Alignment
1.13 Picture
Infocenter –> Special functions –> Service –> Code 8500
geometry
–> Geometry
Feed in a test generator pattern or a standard test pattern in
16:9 format via the aerial or use the integrated test pattern.
Feed in the geometry test pattern in Cinema mode.
Attention:
The "Line shift" alignment influences the line phase.
Before this adjustment, set the horizontal amplitude to minimum
and if necessary correct the raster position with the "Shift plug".
Reset:
The "Reset" menu contains:
- either the optimum picture geometry data entered during
production
- or the average data set read out from the ROM if the TV
is switched on with the emergency data set.
If the TV has been adjusted wrongly, these basic values
can be loaded at any time as follows:
Call up Infocenter –> Special functions –> Service –>
Code 8500 –> Geometry –> Reset and confirm with "OK".
1.14 Adjustment of
- Infocenter –> Special functions –> Service –>
the bridge coil
Code 8500 –> Geometry.
L573
- Set the horizontal amplitude (width) to minimum.
- Connect channel 1of the oscilloscope to the collector of
the transistor T572.
- Connect channel 2 of the oscilloscope between the
diodes D571 and D572.
1.15 Line
Select the convergence test pattern:
sharpness
Contrast to maximum
Set the brightness so that the black background of the test
pattern is just brightening.
2. Picture Tube Panel
Measuring instruments: Oscilloscope with10:1 test probe, high-resistance voltmeter
Service works after replacement or repair of the picture tube panel: alignment 2.1 and 2.2
Alignment
2.1. White balance
Black Stretch set to "off" (Picture Menu)
Infocenter –> Special functions –> Service –> Code 8500
–> White balance
2.2. Screen grid
- Feed in the test pattern.
voltage
- Switch the TV receiver to AV mode.
- Adjust the screen brightness with the remote control
handset so that the grey aeras just become dark.
- Connect the voltmeter (200 kΩ series resistance) to the
test points R, G, B to determine the test point with the
highest voltage level.
- Oscilloscope: measured test point
GRUNDIG Service
Preparations
Preparations
Allgemeiner Teil / General Section
Alignment Process
Via the menu, select the geometry values for the vertical
deflection, then set the values for the horizontal deflection,
first at 50Hz, then at 60Hz field frequency.
Via the menu, select the geometry values for the vertical
deflection, then set the values for the horizontal deflection,first
at 50Hz, then at 60Hz field frequency
Now, with
or
button, move the picture into the centre of
the raster. Re-adjust the horizontal amplitude according to
the test pattern.
Store:
Call up "End without memory" and change with the button
or
to "End with memory".
Store the setting with the "OK" button.
Whenever the TV is switched on the picture geometry is set
to the value stored last.
Set the coil L573 so that the pulse width of both oscillograms
is the same.
With the focus control
on the CRT panel adjust the
horizontal lines for maximum sharpness.
Subsequently, with the focus control
panel, adjust the vertical lines for maximum sharpness.
Repeat.
Attention!
For measurements on the focusing panel use only sufficiently
insulated measuring cables and test probes with adequate
electric strength (eg. 100 : 1).
Alignment Process
With the
buttons set the VG (amplification green) and
VB (amplification blue) values so that the white rectangular
area in the middle of the picture becomes achromatic.
Store with "OK".
- With the control SG on the picture tube panel set the
±
voltage to 162.5V
2.5V.
- If flyback lines are visible on the screen, reduce the
voltage by 10V approximately.
105-110V
162.5V±2.5V
on the focusing
Schwarzwert
Black level
7
Advertisement
Table of Contents
