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Abgleichvorschriften / Adjustment Procedures
Adjustment Procedures
Main Board
Test Equipment / Jigs:
– Computer with installed "Acrobat Reader".
Adjustment of the graphics card: see frame repetition frequency and
resolution (page 1-16).
– Test patterns "1bit" (PDF page 46) and "Colorbar" (PDF page 47).
Alignment:
Carry out the alignment after replacement of IC001 or IC002:
– Service menu, Points 1...3.1.5
Service Menu
1. Calling up and working with the service menu
– Press the »AV/OK« and » « buttons on the TV set at the same time.
The FACTORY menu (service menu) is displayed on the picture
screen.
FACTORY
– FACTORY ADJ
MX88L281 1
AD9884 1
AD9884 2
VPC3230
– Select the desired alignment function (row) using the »P–« or »P+«
button on the TV set or on the remote control.
– Activate the alignment or change the settings using the »L–« or »L+«
button on the set, or the » « or » « button on the remote control.
– Call up the main menu using the »i« button.
2. Exiting the service menu
– Repeatedly press the »i« button on the set or on the remote control
until the menu disappears, or press the »OK« button on the remote
control.
3. Alignment functions
Note: The functions of the FACTORY ADJ menu item are relevant for
the alignment. Via the FACTORY ADJ menu item, the values
for the MX88L281 1, AD9884 1, AD9884 2, and VPC3230 are
automatically adjusted. The values indicated for MX88L281 1,
AD9884 1, AD9884 2, VPC3230 serve as medium and basic
values and are to be changed only if required.
3.1 FACTORY ADJ
3.1.1 CLOCK DELAY
– Connect a computer with installed "Acrobat Reader" to the SVGA
socket.
Observe the setting of the graphics card (see page 1-16, frame
repetition frequency and resolution).
– Call up the "1bit" test pattern (PDF page 46) in full picture mode of
"Acrobat Reader" on the computer.
- Change the setting (typ. 15) until the picture is stable and the vertical
lines are no longer fringed.
3.1.2 AUTO COLOR GAIN
– Connect a computer with installed "Acrobat Reader" to the SVGA
socket.
Observe the setting of the graphics card (see page 1-16, frame
repetition frequency and resolution).
– Call up the "Colorbar" test pattern (PDF page 47) in full picture mode
of "Acrobat Reader" on the computer.
If the achromatic regions in the bottom part of the test pattern should
be coloured, repeat the alignment.
– After activating the alignment function, the alignment is carried out
automatically.
2 - 2
3.1.3 OPTION – X3 – INVERT
– For the OPTION function, "X3 – INVERT" must be set.
3.1.4 TTX Local: PAN EUROPE
– For the TTX Local function, the following settings for country-specific
Teletext special characters are possible:
PAN EUROPE
CYRILLIC-RUSS
GREEK
ARAB
CYRILLIC-UKRA
3.1.5 TTX E/W: WEST
– For the TTX E/W function, it is possible to select between the
country-specific Teletext settings EAST and WEST.
3.2 MX88L281 1 (IC601)
– CONTRAST
25 (0...31)
– BRIGHT
15 (0...31)
– EDGE FILTER
0
– CLOCK DELAY
15 (0...15)
– EXPAND
ON
3.3 AD9884 1 (IC360)
Note: this function can only be called up in PC mode.
– RED GAIN
127 (0...255)
– GREEN GAIN
127 (0...255)
– BLUE GAIN
127 (0...255)
– RED BIAS
31 (0...63)
– GREEN BIAS
31 (0...63)
– BLUE BIAS
31 (0...63)
– AUTO TRACKING (automatic function)
CLOCK
125 (0...250)
PHASE
15 (0...31)
– AUTO COLOR GAIN (see Point 3.1.2)
3.4 AD9884 2 (IC360)
Note: this function can only be called up in PC mode.
– INIT VCO CURRENT (automatic function)
SUB C VCO
1
SUB C CHG CURRENT
4
3.5 AD3230 (IC301)
Note: this function can only be called up in TV mode.
– CONTRAST
52 (0...63)
– BRIGHTNESS
9
– PEAKING
0
– CIP CONTRAST
7
– CIP BRIGHT
7
1bit
Colorbar
THARUS 38 – LCD 38-9210 TOP
(-63...+63)
(0...3)
(0...6)
(0...15)
(0 / 1)
(0...15)
(0...15)
Note:
These test patterns are only avail-
able in the PDF version of the Serv-
ice Manual.
GRUNDIG Service
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