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8.3.2
Tuner
Note: Described alignments are only necessary when the NVM
(part reference number 7641) is replaced.
IFPLL
This adjustment is auto-aligned. Therefore, no action is
required (default= "30").
AGC (AGC take over point)
1. Connect the RF output of a video pattern generator to the
antenna input.
2. Input a colour bar test pattern to the television set.
3. Set the amplitude of the video pattern generator to 10 mV
and set the frequency to 475.25 MHz (PAL/SECAM) or
61.25 MHz (NTSC).
4. Connect a DC multimeter to pin 1 of the tuner (item 1000
on the main chassis).
5. Activate SDAM by pressing the following key sequence on
the remote control transmitter: 0 6 2 5 9 6 directly followed
by the MENU button (do not allow the display to time out
between entries while keying the sequence).
6. Use the MENU UP/DOWN keys to highlight the TUNER
sub menu.
7. Press the MENU LEFT/RIGHT keys to enter the TUNER
sub menu.
8. Use the MENU UP/DOWN keys to select AGC.
9. Use the MENU LEFT/RIGHT keys to adjust the AGC value
(default value is "32") until the DC-voltage at pin 1 of the
tuner lies is 3.3 V.
10. Press the MENU button to return to the top level SDAM
menu.
11. To ensure the AGC change takes effect:
–
Turn the television set 'off' by using the 'POWER'
button on the remote control transmitter or the local
keyboard.
–
Disconnect the television set from AC power for at
least ten seconds.
–
Reconnect the television set to AC power.
–
Turn the television set 'on' by using the 'POWER'
button on the remote control transmitter or the local
keyboard.
SL (Slicing Level)
This adjustment sets the sync slicing level for non-standard
signals. You must turn it 'on' to have no picture instability in
premium decoded cable channels.
•
OFF: slicing level dependent on noise level.
•
ON: fixed slicing level of 70 %.
To adjust SL:
1. Activate SDAM by pressing the following key sequence on
the remote control transmitter: 0 6 2 5 9 6 directly followed
by the MENU button (do not allow the display to time out
between entries while keying the sequence).
2. Use the MENU UP/DOWN keys to highlight the TUNER
sub menu.
3. Press the MENU LEFT/RIGHT keys to enter the TUNER
sub menu.
4. Use the MENU UP/DOWN keys to select SL.
5. Use the MENU LEFT/RIGHT keys to toggle SL 'Off' and
'On'.
6. Press the MENU button to return to the top level SDAM
menu.
7. To ensure the SL setting is saved:
–
Turn the television set 'off' by using the 'POWER'
button on the remote control transmitter or the local
keyboard.
–
Disconnect the television set from AC power for at
least ten seconds.
–
Reconnect the television set to AC power.
–
Turn the television set 'on' by using the 'POWER'
button on the remote control transmitter or the local
keyboard.
Alignments
L03.2L AA
CL (Cathode Drive Level)
Fixed value is "7".
8.3.3
White Tone
The values of the 'black cut-off level' can be adjusted in the
'WHITE TONE' sub menu.
Normally, no alignment is needed for 'WHITE TONE', and the
given default values are used.
Default settings for NORMAL (colour temperature= 11500 K):
NORMAL RED = 22
NORMAL GREEN = 21
NORMAL BLUE = 26
To adjust NORMAL RED, NORMAL GREEN, and NORMAL
BLUE:
1. Connect the RF output of a video pattern generator (e.g.
PM5418) to the antenna input.
2. Set the amplitude of the video pattern generator to at least
1 mV and set the frequency to 475.25 MHz (PAL/SECAM)
or 61.25 MHz (NTSC).
3. Input a "100 IRE white" pattern to the television set.
4. Activate SDAM by pressing the following key sequence on
the remote control transmitter: 0 6 2 5 9 6 directly followed
by the MENU button (do not allow the display to time out
between entries while keying the sequence).
5. Use the MENU UP/DOWN keys to highlight the WHITE
TONE sub menu.
6. Press the MENU LEFT/RIGHT keys to enter the WHITE
TONE sub menu.
7. Use the MENU UP/DOWN keys to select NORMAL RED,
NORMAL GREEN, or NORMAL BLUE.
8. Set the Minolta CA100 colour analyzer (or equivalent) in
RGB mode, and set all colour temperature settings to their
default values.
9. Place the colour sensor of the meter in the middle of the
screen.
10. Set the meter in "T-dUV-Y" mode, and set CONTRAST to
make the light output "Y" on the meter 90 nit ± 15%
11. Use the MENU LEFT/RIGHT keys to adjust the value of
NORMAL GREEN and/or NORMAL BLUE.
12. When all desired changes to the WHITE TONE sub menu
values are made, press the MENU button to return to the
top level SDAM menu.
13. To ensure the WHITE TONE settings are saved:
–
Turn the television set 'off' by using the 'POWER'
button on the remote control transmitter or the local
keyboard.
–
Disconnect the television set from AC power for at
least ten seconds.
–
Reconnect the television set to AC power.
–
Turn the television set 'on' by using the 'POWER'
button on the remote control transmitter or the local
keyboard.
8.
EN 31
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