Philips LC4.1E Service Manual page 49

• Set all colour temperature settings to their initial values, i.e.
Red=185; Green=180; Blue=193.
• The offset values for Cool & Warm should be preloaded
into NVM.
• The alignment is done for Normal only.
Method of alignments
1. Place the colour sensor of the meter at the centre of the
screen with standard orientation (at 0 degree orientation).
2. Set the meter in (T, delta UV, Y) mode.
3. Set Brightness and Colour to nominal (Factory mode,
Brightness 60).
4. Set Colour temp to normal.
5. Set Contrast to make the light output Y on the meter 250 nit
+/-10%.
6. Set Green=128.
7. Adjust Red and Blue to bring delta UV and T to the value
as in the table.
8. Repeat the procedure if necessary to obtain the values as
in the table.
Expected Results
• Measured parameters: Refer to table,
• Specifications: Refer to table,
• Units of measurement: Kelvin.
Table 8-2 Colour temperatures
Colour NORMAL
temp.
∆UV
T (K)
EUROPE 8500 -003
Tolerance +/-10% +/-003 +/-10% +/-003 +/-10% +/-003
8.6.3 Tuner Adjustment
AGC (RF AGC Take Over Point)
Set pattern generator (e.g. PM5580) with colour bar pattern
and connect to aerial input with RF signal amplitude - 10mV
and set frequency for PAL/SECAM to 475.25 MHz. For France
select the L'-signal.
• Activate the SAM-menu. Go to the sub-menu Tuner, select
the sub-menu option AFC Window and adjust the value to
100 kHz.
• Select the AGC sub-menu.
• Connect a DC multi-meter to F306 pin1 of the tuner.
• Adjust the AGC until the voltage at pin 1 of the tuner is 3.3
Volts +0.5 / -1.0.
• The value can be incremented or decremented by pressing
the right/left Menu-button on the RC.
• Switch the set to stand-by to store the data.
8.6.4 Grey Scale Adjustment
SDTV Grey Scale Adjustment
Equipment and Setting
• E.g. Fluke 54200 or Philips PM5580.
• 100% "8-step grey scale" pattern.
Alignment Method
• Switch with the RC to TV mode,
• Press the MUTE button on RC,
• Set SMART PICTURE to SOFT mode,
• Activate the auto colour function by pressing key-
sequence:
"INFO - MUTE - MUTE - MUTE - INFO - MENU - INFO".
Expected Results
• Visual check if the 8 Grey levels are correct.
COOL WARM
∆UV ∆UV
T (K) T (K)
11500 -005 7000 -005
Alignments LC4.1E AB
Analog PC Grey Scale Adjustment
Equipment and setting
• Quantum Data 802B.
• PC input signal, with 64 levels Grey scale pattern,
1024x768 @ 60Hz (Format= 81:DMT1060, Pattern=
123:Grey 64).
• PC input at D-sub VGA connector.
Alignment Method
• Switch with the RC to PC mode.
• Press the MUTE button on RC.
• Set BRIGHTNESS and CONTRAST to nominal "50".
• Activate the auto colour function by pressing key-
sequence:
"INFO - MUTE - MUTE - MUTE - INFO - MENU - INFO".
Expected Results
• Visual check if the 64 Grey levels are correct.
HD Grey Scale Adjustment
Equipment and setting
• Quantum Data 802B.
• HD input signal, Top half 100% colour bar and bottom half
Grey scale pattern,1920x1080i@60Hz YPbPr (Format=
1080i30, Pattern= HDBar100).
• HD input at D-sub VGA connector.
Alignment Method
• Switch with the RC to HD mode.
• Press the MUTE button on RC.
• Activate the auto colour function by pressing key-
sequence:
"INFO - MUTE - MUTE - MUTE - INFO - MENU - INFO".
Expected Results
• Visual check if Colour bar tint and Grey scale is correct.
8.6.5 Sound
No adjustments needed for sound.
The default values for the audio alignments are:
• QSS: On
• FMI: Off
• NICAM Alignment: 63
• Lip Sync: Off
• DBE: Off
8.6.6 Options
Options are used to control the presence/absence of certain
features and hardware. Some Hercules NVM settings can be
changed group wise (via Option Bytes), as well as bit by bit via
the NVM Editor, see the text below.
How to Change an Option Byte
An Option Byte represents a number of different options.
Changing these bytes directly makes it possible to set all
options very fast. All options are controlled via seven option
bytes. Select the option byte (OP1.. OP7) with the cursor UP/
DOWN keys, and enter the new value.
Leaving the OPTION sub menu saves the changes in the
Option Byte settings. Some changes will only take effect after
the set has been switched "off" and "on" with the AC power
switch (cold start).
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