Philips LC03E Service Manual page 100

EN 100 8.
8.3.2
Geometry
The geometry alignments menu contains 2 items to align a
correct picture geometry. In wide screen sets, the GEOMETRY
SW is available for separate alignments of the super wide
(panorama) mode. The geometry alignments are:
•
HOR SHIFT; align the horizontal centre of the picture to the
horizontal centre of the display.
•
H60 SHIFT; display alignment when using the system on a
60Hz network.
8.3.3
White Tone
In the WHITE TONE sub menu the colour values for the colour
temperature values can be changed.
The colour temperature mode (NORMAL, DELTA COOL,
DELTA WARM) or the colour (R, G, B) can be selected with the
RIGHT/LEFT cursor keys. The mode or value can be changed
with the UP/DOWN cursor keys.
First the values for the NORMAL colour temperature should be
selected. Range: 0-255, 128 represent the middle of the value
(no offset difference). Then the offset values for the DELTA
COOL and DELTA WARM mode can be selected.
Note: The alignment values are non-linear. The range is: -50 to
+50, 0 represent the middle value, (no offset difference).
Input signal strength:>=10 mVrms (80 dBV) teminal voltage.
Input injection point:Aerial input.
Align Method
Initial Set-up
•
20 minutes soaking time before carrying out Colour Temp
alignment.
•
Incredible Picture/Contrast+ and Active Control (Blue
stretch off) must be switched OFF for proper tracking.
•
Set all colour temperature settings to their initial values, i.e.
RED=128; Green=128; BLUE=128.
•
The offset values for COOL & WARM should be preloaded
into NVM.
•
The alignment is done for NORMAL only.
Method of Alignments
Place the colour sensor of the meter at the center of the screen.
Set the meter in (T, ,Y) mode.
Set brightness and colour to nominal (factory mode).
Set colour temp to normal.
Set contrast to make the light output Y on the meter 250 nit +/-
10%.
Set RED=131.
Adjust GREEN to bring to the value as in the table.
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 8-1 Colour temperatures
Colour
temp. NORMAL
∆UV
T (K)
EUROPE 8,500 -005
AP 8,500 -005
USA 8,500 -005
LATAM 8,500 -005
Tolerance +/- 10% +/-003 +/-10% +/-003 +/-10% +/-003
LC03E Electrical Alignments
COOL WARM
∆UV ∆UV
T (K) T (K)
11,500 -005 7,000 -005
11,500 -005 7,000 -005
11,500 -005 7,000 -005
11,500 -005 7,000 -005
8.3.4
Tuner Adjustment
AGC (RF AGC Take Over Point)
Set pattern generator (e.g. PM5418) 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 100kHz.
•
Select the AGC sub-menu
•
Connect a DC multi-meter to pin 1 of the tuner IC 1225.
•
Adjust the AGC until the voltage at pin 1 of the tuner is 1.0V
+/- 0.1V.
•
The value can be incremented or decremented by pressing
the right/left MENU-button on the RC.
•
Switch the set to standby to store the data.
Tuner options - IF PLL OFFSET and AFC WINDOW
NO ADJUSTMENTS NEEDED FOR THESE ALIGNMENTS
The default values for these options are:
•
IF PLL OFFSET: 31 (default)
•
AGC WINDOW: 24 (default)
8.3.5
Sound
NO ADJUSTMENTS NEEDED FOR SOUND
The default values for the audio alignments are:
•
NIC-FMAM
higher the more tolerance
•
2CS-FM
•
PS-FM
•
PS-NIC BG/DK
system
•
PS-NIC I
•
PS-NIC L
8.4
Options
8.4.1
Options
Options are used to control the presence / absence of certain
features and hardware. There are two ways to change the
option settings, see figure 1: "Service Alignments Mode
screens and structure".
Changing a Single Option
An option can be selected with the MENU UP/DOWN keys and
its setting can be changed with the MENU LEFT/RIGHT keys
Changing multiple options by changing option byte values
Option bytes make it possible to set very fast all options. An
option byte represents a number of different options. All options
of the chassis are controlled via 5 option bytes. Select the
option byte (OB1, OB2, OB3, OB4, OB5) and key in the new
value.
8.4.2
List of Options
Unless otherwise stated Y(es) means present (or ON), N(o)
means not present (or OFF).
:250NICAM error rate threshold, the
:40
:38Prescale for FM
:82Prescale for NICAM in BG/DK
:127Prescale for NICAM in I system
:82Prescale for NICAM in L system