Alignments
EN 57
LC4.5E AA
8.
8.
Alignments
Index of this chapter:
8.1 General Alignment Conditions
8.2 Software Alignments
8.3 Option Settings
Note:
The Service Default Mode (SDM) and Service Alignment
Mode (SAM) are described in chapter 5. Menu navigation is
done with the CURSOR UP, DOWN, LEFT or RIGHT keys of
the remote control transmitter.
8.1
General Alignment Conditions
8.1.1
Start Conditions
Perform all electrical adjustments under the following
conditions:
•
Power supply voltage (depends on region):
–
AP-NTSC: 120 V
AC
or 230 V
AC
/ 50 Hz (
±
10%).
–
AP-PAL-multi: 120 - 230 V
AC
/ 50 Hz (
±
10%).
–
EU: 230 V
AC
/ 50 Hz (
±
10%).
–
LATAM-NTSC: 120 - 230 V
AC
/ 50 Hz (
±
10%).
–
US: 120 V
AC
/ 60 Hz (
±
10%).
•
Connect the set to the mains via an isolation transformer
with low internal resistance.
•
Allow the set to warm up for approximately 15 minutes.
•
Measure voltages and waveforms in relation to chassis
ground (with the exception of the voltages on the primary
side of the power supply).
Caution:
never use heatsinks as ground.
•
Test probe: Ri > 10 Mohm, Ci < 20 pF.
•
Use an isolated trimmer/screwdriver to perform
alignments.
8.1.2
Initial Settings
Perform all electrical adjustments with the following initial
settings:
1.
To avoid the working of the light sensor, set "Active
Control" to "Off" (via the "Active Control" button on the RC).
2.
Set "Smart Picture" to "Natural" or “Soft” (via the "Smart
Picture" button on the RC).
8.1.3
Alignment Sequence
•
First, set the correct options:
–
In SAM, select OPTIONS,
–
Fill in the option settings according to the set sticker
(see also paragraph "Option Settings"),
–
Store the OPTIONS by switching the set to STAND-
BY.
•
Warming up (>15 minutes).
•
White-D alignment.
8.2
Software Alignments
With the software alignments of the Service Alignment Mode
(SAM) the geometry, white tone and tuner (IF) can be aligned.
To store the data: Use the RC button Menu to switch to the
main menu and next, switch to ‘Stand-by’ mode.
For the next alignments, supply the following test signals via a
video generator to the RF input:
•
EU/AP-PAL
models: a PAL B/G TV-signal with a signal
strength of at least 1 mV and a frequency of 475.25 MHz
•
US/AP-NTSC
models: an NTSC M/N TV-signal with a
signal strength of at least 1 mV and a frequency of 61.25
MHz (channel 3).
