CUC 2021Abgleich / Alignment
GB Alignment
Attention!
After any repair or replacement of NVM (IC82005) check whether the NTSC 3.58MHz quartz (Q34044, page 3-3) is fitted. If it is not, the dialog line
"NTSC 3.6" in the Service Menu must be set to "off".
Button "6" �> "OK" �> SERVICE �> "OK" �> SERVICE Code "8500" �> NTSC 3.6 "off" and in dialog line "END" store the setting "with mem.".
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.
Chassis Board
Measuring instruments: Digital voltmeter, colour video generator, spectrum analyser, RF millivoltmeter
Service works after replacement or repair of the following modules:
- Power supply: alignment 1.
- Tuner: alignment 2.
- IF, video demodulator: alignment 2.
- CRT, CRT panel: alignment 7�9.
- Deflection: alignment 9.
- NVM IC82005: alignment 2�7., 10�11
AlignmentPreparations Alignment Process
1. +A voltageThis voltage must be checked and re-adjusted if necessary Adjust R60037 acc. to the table on the power supply circuit
after every repair and before every alignment.diagram.
Brightness: Minimum
Digital voltmeter: Cathode D61016
2. Tuner AGCSpectrum analyser or RF millivoltmeter unsymmetrical to Adjust 102dBmV (360mVpp) with button 4 or 3.
tuner contact 10, 11.
Feed in a standard test pattern or generator via the aerial, Alternatively, without using a spectrum analyser or RF
70�80dBmV.millivoltmeter, adjust the picture with button 4 or 3 so
that noise just appears on the screen. Then reset until the
Call up the dialog line "AGC" via "6" (DIALOG CENTER) �> picture is again free of noise.
"OK" �> SERVICE �> "OK" �> Service Code "8500".
Terminate the dialog line "End" "with mem.".
3. OSDCall up the dialog line "OSD" via "6" (DIALOG CENTER) �> With button 4 or 3 position the menu in the middle of the
"OK" �> SERVICE �> "OK" �> Service Code "8500".picture.
Terminate the dialog line "End" "with mem.".
4. TubeCall up the dialog line "Tube" via "6" (DIALOG CENTER) With button 4 or 3 enter the correct screen diagonal.
(Type of picture�> "OK" �> SERVICE �> "OK" �> Service Code "8500".Terminate the dialog line "End" "with mem."
tube)
5. OverscanCall up the dialog line "Overscan" via "6" (DIALOG CENTER) With button 4 or 3 select "off".
(switch-off�> "OK" �> SERVICE �> "OK" �> Service Code "8500".
behaviour ofTerminate the dialog line "End" "with mem."
tube)
6. NTSC 3.6Call up the dialog line "NTSC 3.6" via "6" (DIALOG CENTER) With button 4 or 3 select "on " for models with NTSC or
�> "OK" �> SERVICE �> "OK" �> Service Code "8500"."off" for models without NTSC.
Terminate the dialog line "End" "with mem."
7. White BalanceFeed in a grey scale test pattern with burst.With button 4 or 3 set the values for "Green" and
Contrast (W) to maximum."Blue" so that the picture becomes achromatic.
Colour contrast (E) to mid-position.
Screen brightness (R) to mid-position.Check this alignment at minimum and maximum contrast.
Call up dialog line "WHITE ADJUSTMENT" via "6" (DIALOG Go back to the "SERVICE" menu with "6" and terminate
CENTER) �> "OK" �> SERVICE �> "OK" �> Service Code the dialog line "End" "with mem.".
"8500".
8. Cut-off AlignCall up dialog line "Cut-off align" via "6" (DIALOG CENTER) With adjustment control UG2 (Split transfo), adjust the line
(screen grid�> "OK" �> SERVICE �> "OK" �> Service Code "8500".appearing first - red, green, blue or mixed-colour - so that
voltage U )it is just well visible.
Return to the menu with "OK".G2
9. Line SharpnessFeed in a convergency test pattern.With focus control UF (Split transfo), adjust the vertical
Contrast (W) to maximum.lines approx. 5cm from the right and left picture edge to
Set the screen brightness (R) so that the blackminimum horizontal width.
background of the test pattern just starts to brighten.The sharpness in the middle must not seem to be worse
than the sharpness at the edges. If necessary, take an
average.
GRUNDIG Service2 - 3 |
ACEC
GRUNDIG
