Grundig LCD 51-9310 DOLBY, Service Manual

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GRUNDIG Service THARUS 51 LCD 51-9310 DOLBY
2 - 3
Alignment
All adjustment controls not mentioned in this description are adjusted during production and must not be re-adjusted in the case of repairs.
Call up the service menu: Button "
Ǻ
" (EASY DIALOG)
Call up the dialogue line: Buttons " P+ " or " P- " –> "OK"
Change setting in the dialogue line: Buttons " L+ " or " L- " –> "OK"
Back to previous menu: " blue " button
Exit menu: Button "
Ǻ
"
Service menu for the dealer (code no.): " 8500 "
Measuring instruments: 100MHz oscilloscope with 10:1 test probe, colour test pattern generator.
1. Display Typ
2. IF Type
3. Terr. Tuner Typ
4. Tuner AGC
5. White level
6. Black level
balance
7. Screen
geometry
Call up the "Picture tube type" menu via "EASY DIA-
LOG" –> "Installation" –> "Only for the retailer" –> Code
number "8500" –> "Hardware settings".
Call up the "IF-Type" menu via "EASY DIALOG" –>
"Installation" –> "Dealer service menu" –> "8500" –> "Hard-
ware settings".
Call up the "Terr. Tuner" menu via "EASY DIALOG" –>
"Installation" –> "Only for the retailer" –> Code number
"8500" –> "Hardware settings".
Connect the 100MHz oscilloscope to the tuner contact 10
or 11 and to tuner ground.
Feed in a test pattern (sound carrier switched off) via the
aerial, 70…80dB
µ
V.
Call up the "AGC setting" menu via "EASY DIALOG" –>
"Installation" –> "Dealer service menu" –> "8500" –> "Spe-
cial functions".
Feed in a grey scale test pattern with burst.
White balance:
Central position
Contrast: Maximum
Colour contrast: Mean value
Screen brighness: Mean value
Tilt angle: Mean value
Call up the "White level alignment" menu via "EASY
DIALOG" –> "Installation" –> "Dealer service menu" –>
"8500" –> "Picture settings".
Call up the "Black level balance" menu via "EASY
DIALOG" –> "Installation" –> "Dealer service menu" –>
"8500" –> "Picture settings".
Select the AV position (black picture) on the TV set.
.
Call up the "Screen geometry" menu via "EASY DIALOG" –>
"Installation" –> "Dealer service menu" –> "8500".
Feed in a geometry test pattern.
Reset: The "Reset" field contains:
- either the optimum picture geometry data set at the
factory,
- or an average data record from the ROM if the set has
been started with the emergency data record.
After an incorrect alignment you may reload this basic data
at any time:
Call up the "Reset" menu via "EASY DIALOG" –>
"Installation" –> "Dealer service menu" –> "8500" –> "Screen
geometry".
Select the appropriate display type :
1 LG 20" 4:3
2 NEC 20" 4:3
3 Samsung 22" 16:9
4 NEC 23" 16:9
5 LCD 30" 16:9
Adjust to IF Type built into the set.
National, Multi 8,
Multi 9 .
Select the appropriate tuner type .
Set to 300-350mV
pp
.
Adjust the values for red, green and blue so that the
picture becomes achromatic.
Note:
When calling up the menus again, the value of the largest
component is always 511, the other values are converted.
Adjust the "red", "green" and "blue" values in such a way
that the transition of the colour staircase (test pattern) is at
the same place for all 3 colours (R,G,B just visible). The
control values for the components should remain as close
as possible to the given value 248.
Adjust the offset in such a way that the colour window is
located inside the centre frame
Using the controls for Picture Height, Vert. Pos., Horiz.
Pos., and Picture Width, move the test pattern into the
centre of the picture screen, and then adjust a symmetrical
display reading.
Saving:
The set value is saved by pressing the "yellow" button.
The picture geometry adjusts itself to the last saved value
when switching the TV set on again.
Alignment Preparations Alignment procedure