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CUC 2020 FR
Alignment
GB
Attention!
1. After any repair or replacement of NVM (IC82005) check whether the NTSC 3.58MHz quarz is fitted. It is not, the dialog line "NTSC 3,6" in the
Service Menu must be set to "off".
Button " " –> "OK" –> SERVICE –> "OK" –> SERVICE Code "8500" –> NTSC 3,6 "off" and in dialog line "END" store the setting "with mem.".
2. When no SAT Receiver (microSAT) is connected to the AV1 socket, "SAT" in the Service Menu is to be set to "off".
Button " " –> "OK" –> SERVICE –> "OK", select dialog line "SAT" and switch to "off".
All adjustment controls not mentioned in this description are pre-set at the factory and must not be re-adjusted in the case of repairs.
1. Chassis Board
Measuring instruments: 10:1 test probe, colour video generator , digital voltmeter, spectrum analyser or RF millivoltmeter
Service works after replacement or repair of the following modules:
- Power supply: alignment 1.1
- Tuner, IF, Video demodulator: alignment 1.3
- NVM IC82005: alignment 1.2 ...1.5, 2.1, 2.2
Alignment
1.1 +A voltage
This voltage must be checked and re-adjusted if necessary
after every repair and before every alignment.
Brightness: Minimum
digital voltmeter: cathode D61016.
1.2 White Balance
Feed in a grey scale black/white test pattern with burst.
Contrast ( ) to maximum.
Colour contrast ( ) to mid-position.
Screen brightness ( ) to mid-position.
Call up the dialog line "WHITE ADJUSTMENT" via
" " (DIALOG CENTER) –>"OK" –> SERVICE –> "OK" –>
Service Code "8500".
1.3 Tuner AGC
Spectrum analyser or RF millivoltmeter symmetrical to
tuner contact 10, 11.
Feed in a standard test pattern or generator via the aerial,
70...80dBµV.
Call up the dialog line "AGC" via " " (DIALOG CENTER)
–>"OK" –> SERVICE –> "OK" –>
Service Code "8500".
1.4 OSD
Call up the dialog line "OSD" via " " (DIALOG CENTER)
–>"OK" –> SERVICE –> "OK" –>
Service Code "8500".
1.5 Tube
Call up the dialog line "Tube" via " " (DIALOG CENTER)
(Type of picture
–>"OK" –> SERVICE –> "OK" –>
tube)
Service Code "8500".
GRUNDIG Service
Preparations
Alignment Process
Adjust R60037 acc. to the table on the circuit diagram
section mains section.
With button "
-" or "+
" set the values for "Green"
and "Blue" so that the picture becomes achromatic.
Check the White Balance with Contrast min. and max.
Terminate "with mem.".
Adjust 102dBµV (360mV
) with button "
pp
Alternatively, without using a spectrum analyser or RF
millivoltmeter, adjust the picture with button "
so that noise just appears on the screen. Then reset until
the picture is again free of noise.
Terminate "with mem.".
With button "
-" or "+
" position the menu in the
middle of the picture.
Terminate "with mem.".
With button "
-" or "+
" enter the correct screen
diagonal.
Terminate "with mem.".
Alignement / Alignment
-" or "+
".
-" or "+
"
2 - 3
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