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Alignments
Index of this chapter:
1. General Alignment Conditions
2. Hardware Alignments
3. Software Alignments and Settings
Note: The Service Default Alignment Mode (SDAM) is described in the "Service Modes, Error
Codes and Fault Finding" section. SDAM menu navigation is performed by using the MENU UP,
MENU DOWN, MENU LEFT, and MENU RIGHT keys of the remote control transmitter.
General Alignment Conditions
Perform all electrical adjustments under the following conditions:
AC voltage and frequency: 110 V (± 10 %), 60 Hz (± 5 %).
Connect the television set to the AC power via an isolation transformer.
Allow the television set to warm up for approximately 20 minutes.
Measure the voltages and waveforms in relation to chassis ground (with the exception of the
voltages on the primary side of the power supply). Never use heatsinks as ground.
Test probe: Ri > 10 MOhm; Ci < 2.5 pF.
Use an isolated trimmer/screwdriver to perform the alignments.
Hardware Alignments
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Figure: Family board (top view)
Vg2 Adjustment
1. To enter SDAM, press 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 WHITE TONE sub menu.
3. Press the MENU LEFT or MENU RIGHT key to enter the WHITE TONE sub menu.
4. In the WHITE TONE sub menu, press the MENU UP/DOWN keys to select NORMAL RED,
NORMAL GREEN, or NORMAL BLUE.
5. Use the MENU LEFT/RIGHT keys to set the values of NORMAL RED, NORMAL GREEN
and NORMAL BLUE to '40'.
6. Press the MENU button twice to enter the normal user menu.
7. In the normal user menu, use the MENU UP/DOWN keys to highlight the PICTURE sub
menu (if necessary).
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8. Press the MENU LEFT/RIGHT keys to enter the PICTURE sub menu.
9. Use the MENU UP/DOWN keys to select PICTURE. Be sure to record the current value of
PICTURE.
10. Use the MENU LEFT/RIGHT keys to set the value of PICTURE to '0'.
11. Use the MENU UP/DOWN keys to select BRIGHTNESS. Be sure to record the current value
of BRIGHTNESS.
12. Use the MENU LEFT/RIGHT keys to set the value of BRIGHTNESS to minimum (OSD just
visible in a dark room).
13. Press the MENU button twice to return to the top level SDAM menu.
14. Press the STATUS/EXIT button to hide the SDAM onscreen display.
15. Connect the RF output of a video pattern generator to the antenna input.
16. Input a 'black picture' test pattern to the television set.
17. Set the oscilloscope to 50 V/div and the time base to 0.2 milliseconds (external triggering on
the vertical pulse).
18. Ground the scope at the CRT panel and connect a 10:1 probe to one of the cathodes of the
picture tube socket (see schematic diagram B).
19. Measure the' cut off pulse' during the first full line after the frame blanking (see Fig. 8-2). You
will see two pulses, one being the 'cut off pulse' and the other being the 'white drive pulse'.
Choose the one with the lowest value; this is the 'cut off pulse'.
20. Select the cathode with the highest VDC value for the alignment. Adjust the Vcutoff of this
gun with the SCREEN potentiometer (see Fig. 8-1) on the LOT to the correct value (see table
8-1).
21. Press the STATUS/EXIT button to display the SDAM onscreen display.
22. Press the MENU button to enter the normal user menu.
23. In the normal user menu, use the MENU UP/DOWN keys to highlight the PICTURE sub
menu (if necessary).
24. Press the MENU LEFT/RIGHT keys to enter the PICTURE sub menu.
25. Use the MENU UP/DOWN keys to select PICTURE.
26. Use the MENU LEFT/RIGHT keys to reset the value of PICTURE to the original value.
27. Use the MENU UP/DOWN keys to select BRIGHTNESS.
28. Use the MENU LEFT/RIGHT keys to reset the value of BRIGHTNESS to the original value.
29. Press the MENU button twice to return to the top level SDAM menu.
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30. Use the POWER button on the remote control transmitter or the POWER button on the
television set to turn off the television set. This will save the changes made in SDAM.
Figure: Vcutoff
Table: Vg2 cut-off point (Large Screen)
Screen Size (RF= Real Flat)
20RF Matsushita
20RF Samsung
20RF LG Philips
25V Curved Face
27V Curved Face
27RF
29RF LG Philips
20RF Philips
27RF Samsung
32RF
26 Wide Screen RF
30 Wide Screen RF
Cut-off point (V)
+145 V +/- 4 V
+155 V +/- 4 V
+160 V +/- 4 V
RF = Real Flat
V = (Visible) Diagonal Screen Measurement of Phosphor
Focusing
1. Connect the RF output of a video pattern generator to the antenna input.
2. Input a circle or crosshatch test pattern to the television set.
3. Press the AUTO PICTURE button on the remote control transmitter repeatedly to choose
PERSONAL or MOVIES picture mode.
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4. Adjust the FOCUS potentiometer (see Fig. 8-1) until the vertical lines near the left and right
sides of the screen, and near the horizontal center of the screen, are at minimum width without
visible haze.
Software Alignments and Settings
The following options are performed in the Service Default Alignment Mode (SDAM). SDAM is
described in the 'Service Modes, Error Codes and Fault Finding' section.
The following alignments are explained:
1. OPTIONS
2. TUNER
3. WHITE TONE
4. GEOMETRY
5. AUDIO
Options
Options are used to control the presence or absence of certain features and hardware.
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 quickly. All options are controlled via seven option bytes.
Note: Each option byte controls several features of the television set; therefore, before changing
option byte information, it is important to record the current option byte values. This ensures that the
television features can be restored to the original settings, if necessary.
1. To enter SDAM, press 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 OPTIONS sub menu.
3. Press the MENU LEFT or MENU RIGHT key to enter the OPTIONS sub menu.
4. In the OPTIONS sub menu, press the MENU UP/DOWN keys to select 'OP 1' through 'OP 7'.
5. Use the number keys on the remote control transmitter to enter a new value for the selected
option byte. The value must be entered as a three-digit value (for example, '4' would be
entered as '0 0 4').
6. The selected value must be between '0' and '255'.
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7. When all desired changes to the option bytes are made, press the MENU button to return to the
top level SDAM menu. This will save changes to the option byte settings.
8. To ensure the option byte changes take 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.
Figure: Options menu
How to change iTV Option Bytes
An Option Byte represents a number of different options. Changing these bytes directly makes it
possible to set all options very quickly. All options are controlled via five option bytes.
Note: Each option byte controls several features of the television set; therefore, before changing
option byte information, it is important to record the current option byte values. This ensures that the
television features can be restored to the original settings, if necessary.
1. To enter SDM, you must use a Philips ITV commercial setup transmitter (such as the
RC2573GR or the RG4172BK). Use the following method to enter SDM:
First, place the setup remote in setup mode. To place the the RG4172BK in setup mode, press
TV SETUP; to place the the RC2573GR in setup mode, set the switch to the TV SETUP
position. Then press 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 scroll through the OPTIONS until you reach OB1 through
OB5.
3. Use the number keys on the remote control transmitter to enter a new value for the selected
option byte. The value must be entered as a three-digit value (for example, '4' would be
entered as '0 0 4').
4. The selected value must be between '0' and '255'.
5. When all desired changes to the option bytes are made, press the MENU button to return to the
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top level SDM menu. This will save changes to the option byte settings.
6. To ensure the option byte changes take 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.
Option Code Tables
Table: Option code settings
Model Number
20DV693R01
20DV693R02
20MS334R37
20PT633R/37
20PT643F/35R
20PT643R01
20PT653R/37
21PT6331/44R
21PT633R/85C
21PT6431/44R
21PT643R/85C
24PT633F/35R
24PT633R/37
25PT533S/37C
25PT633R/85C
27DV693R37A
27MS3404/17
27MS4504/17
27PT541S37A
27PT543F35A
27PT543S/37A
27PT563S37A
27PT633R/37C
27PT643F35A
27PT643R/37C
27PT643R/37A
27PT643R/97A
OP1
0
0
0
0
64
0
0
16
0
16
0
64
0
0
0
0
0
0
0
64
0
0
0
64
0
0
0
OP2
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
OP3
65
65
65
1
65
1
1
65
1
65
1
193
129
1
129
209
65
193
65
65
1
65
145
193
193
193
193
OP4
162
162
1
1
1
1
1
1
1
1
1
1
1
1
1
162
1
1
1
1
1
162
162
1
1
1
1
OP5
252
252
144
144
236
236
252
144
144
236
236
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
OP6
153
153
88
152
152
152
152
152
152
152
152
152
152
152
152
153
152
152
152
152
152
153
153
152
152
152
152
OP7
64
80
0
0
0
0
0
0
0
0
0
0
0
0
0
64
0
0
0
0
0
80
80
0
0
0
0
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27PT663R/37A
27PT663R/37C
29DV6931/85R
29PT543S/44A
29PT543S/85A
29PT563S/85A
29PT633R/85A
29PT633R/85C
29PT643R85A
29PT6631/44R
29PT663R/85A
29PT663R/85C
29PT663S85A
30DV693R37A
30DV693R37C
30PW633F35A
30PW633R37A
30PW633R37C
32PT541S37G
32PT543S/37A
32PT543S/37G
32PT553S/37A
32PT553S/37G
32PT563S37A
32PT563S37G
32PT633R/37D
32PT663R/37A
MS3252S431
MS3652S427
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0
0
16
0
0
0
0
0
16
16
0
0
16
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
23
23
23
23
23
23
23
23
23
23
23
23
23
31
31
31
31
31
23
23
23
23
23
23
23
31
31
23
23
145
145
209
1
1
1
129
129
193
209
145
145
209
149
149
149
149
149
193
129
129
129
129
193
193
145
145
129
129
162
162
162
1
1
162
1
1
1
162
162
162
162
162
162
162
162
162
1
1
1
1
1
162
162
162
162
1
1
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
252
189
189
153
153
153
152
152
153
152
152
152
153
153
153
153
153
153
153
153
153
152
152
152
152
152
153
153
153
153
88
88
80
80
64
0
0
80
0
0
0
80
80
80
80
64
64
80
80
80
0
0
0
64
64
80
80
80
80
0
0
Table: Option code settings for iTV/Commercial models
Model Number
25LT220L/17
25LT421L/17
25ST220L/17
27LT220L/17
27LT621L/17
27ST110P/35
OP1
212
196
212
212
198
212
OP2
16
252
16
16
252
16
OP3
2
3
2
2
3
2
OP4
65
33
67
65
33
67
OP5
168
172
8
168
172
8
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27ST220L/17
27ST230P/35
27ST240P/35
27ST420L/17
27ST421L/17
32LT621L/17
32ST220P/17
32ST230P/35
36ST220P/35
36ST230P/35
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212
212
212
196
196
198
198
198
198
198
16
16
16
220
220
252
220
220
220
220
2
2
2
3
3
11
11
11
11
11
67
67
67
35
35
41
43
43
43
43
8
8
8
12
12
252
12
12
12
12
Tuner
Note: Described alignments are only necessary when the NVM (part reference number 7602) is
replaced.
IF-PLL
This adjustment is auto-aligned. Therefore, no action is required.
AGC (AGC take over point)
1. Connect the RF output of a video pattern generator to the antenna input.
2. Input a color bar test pattern to the television set.
3. Set the amplitude of the video pattern generator to 10 mV and set the frequency to 61.25 MHz
(channel 3).
4. Connect a DC multimeter to pin 1 of the tuner (item 1000 on the main chassis).
5. To enter SDAM, press 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 27) until the DCvoltage at pin 1 of the tuner lies between 3.8 V and 2.3 V.
10. Press the MENU button to return to the top level SDAM menu.
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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 help
correct picture instability in premium decoded cable channels.
OFF: slicing level dependent on noise detector.
ON: fixed slicing level of 70 %.
To adjust SL:
1. To enter SDAM, press 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.
White Tone
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Figure: White tone alignment menu
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:
NORMAL (color temperature = 9600 K):
NORMAL RED = 40
NORMAL GREEN = 40
NORMAL BLUE = 40
To adjust NORMAL RED, NORMAL GREEN, and NORMAL BLUE:
1. To enter SDAM, press 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 WHITE TONE sub menu.
3. Press the MENU LEFT/RIGHT keys to enter the WHITE TONE sub menu.
4. Use the MENU UP/DOWN keys to select NORMAL RED, NORMAL GREEN, or NORMAL
BLUE.
5. Use the MENU LEFT/RIGHT keys to adjust the value of NORMAL RED, NORMAL
GREEN, or NORMAL BLUE.
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6. 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.
7. 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.
Geometry
The geometry alignments menu contains several items for correct picture geometry alignment.
1. Connect the RF output of a video pattern generator to the antenna input.
2. Input a crosshatch test pattern to the television set.
3. Set the amplitude of the video pattern generator to at least 1 mV and set the frequency to 61.25
MHz (channel 3).
4. Press the AUTO PICTURE button on the remote control transmitter repeatedly to choose
PERSONAL or MOVIES picture mode.
5. To enter SDAM, press 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 GEOMETRY sub menu.
7. Press the MENU LEFT/RIGHT keys to enter the GEOMETRY sub menu.
8. Use the MENU UP/DOWN keys to highlight either the HORIZONTAL sub menu or the
VERTICAL sub menu.
9. Press the MENU LEFT/RIGHT keys to enter either the HORIZONTAL sub menu or the
VERTICAL sub menu.
10. Use the MENU UP/DOWN keys to select items in the HORIZONTAL sub menu or the
VERTICAL sub menu.
11. Use the MENU LEFT/RIGHT keys to adjust the values of items in the HORIZONTAL and
VERTICAL sub menus.
12. When all desired changes to the HORIZONTAL and VERTICAL sub menu values are made,
press the MENU button twice to return to the top level SDAM menu.
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13. To ensure the GEOMETRY 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.
Figure: Geometry alignments
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The following alignments can be performed in the GEOMETRY sub menu:
Horizontal Amplitude and Phase:
Figure: Horizontal alignment menu
Horizontal Shift (HSH). Select Horizontal Shift to center the picture on the screen.
Horizontal Parallelogram (HP). Set Horizontal Parallelogram to prevent the picture from
slanting to one side.
Horizontal Bow (HB). Set Horizontal Bow to prevent the top and bottom of picture from
bending to the sides.
East West Width (EWW). Select East-West Width and align the picture width until the
complete test pattern is visible.
East West Parabola (EWP). Select East-West Parabola and align the vertical sides until the
sides are straightened.
Upper Corner Parabola (UCP). Select Upper Corner Parabola to straighten the top of the
vertical lines at the sides.
Lower Corner Parabola (LCP). Select Lower Corner Parabola to straighten the bottom of
the vertical lines at the sides.
East West Trapezium (EWT). Align straight vertical lines in the middle of the screen.
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Vertical Amplitude and Position:
Figure: ertical alignment menu
Vertical Amplitude (VAM). Aligns the height of the picture (other vertical alignments are
NOT compensated).
Vertical slope (VSL). Aligns the picture so the proportions are the same at the top and botton
of the screen.This alignment must be performed first, before all other vertical alignments.
Turning SBL 'on' will assist in performing this alignment.
Service blanking (SBL). Turns the blanking of the lower half of the screen 'on' or 'off' (to be
used in combination with the vertical slope alignment).
Vertical S-Correction (VSC). Aligns the vertical linearity, so that the vertical intervals of the
grid-patterns are the same over the entire height of the screen.
Vertical Shift (VSH). Aligns the vertical center of the picture to the vertical center of the
CRT. After performing this alignment, it may be necessary to perform the VAM alignment
again.
Vertical Zoom (VX). Adjusts the picture height.
Delta Horizontal Shift 60 Hz (H60).
Delta Vertical Amplitude 60 Hz (V60).
Methods of adjustment
1. Select Service Blanking (SBL) and set it to 1. The lower half of the picture will be blanked.
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2. Press the MENU UP/DOWN buttons to select Vertical Slope (VSL).
3. Align VSL to start the blanking exactly at the horizontal white line at the center of the test
circle (align the bottom of the screen so that castellations just disappear).
4. Press the MENU UP/DOWN buttons to select SBL and set it back to 0. The full picture
reappears.
5. Select Vertical Amplitude (VAM) and align the picture height to approximately 13.0 - 13.1
blocks (align the top of the screen so that castellations just disappear).
6. Select Vertical Shift (VSH) and align for vertical centering of the picture on the screen.
Repeat the last two steps if necessary.
The table below lists the default GEOMETRY values for the different television sets.
Table: Default geometry values (Large Screen)
Parameter
HP
HorizontalParallelogram
HB
HorizontalBow
HSH
Horizontal
Shift
EWW EastWest Width
EWP EastWest
Parabola
UCP Upper
Corner
Parabola
20RF,
21RF,
25RF,
27RF,
29RF,
25V 27V/29" 35V 28WS 32WS 28WSRF 32WSRF
25",
28",
29"SF,
32V,
33"
31
31
31
45
47
32
36
45
31
31
31
25
32
32
40
30
35
35
35
23
27
24
31
29
34
-
-
45
36
39
40
33
33
-
-
23
21
21
37
16
35
-
-
25
26
23
14
16
LCP Lower
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Corner
Parabola
EWT EastWest
Trapezium
VSL Vertical
Slope
VAM
Vertical
Amplitude
VSC Vertical
S-Correction
VSH Vertical
Shift
VX Vertical
Zoom
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35
-
-
31
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Audio
Figure: Audio alignment menu
No alignments are necessary for the AUDIO sub menu. Use the default values.
AF-M (NICAM threshold)
Default value is 300.
To adjust AF-M:
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1. To enter SDAM, press 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 AUDIO sub menu.
3. Press the MENU LEFT/RIGHT keys to enter the AUDIO sub menu.
4. Use the MENU UP/DOWN keys to select AF-M.
5. Use the MENU LEFT/RIGHT keys to adjust the value of AF-M to 300.
6. Press the MENU button to return to the top level SDAM menu.
7. To ensure the AF-M 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.
A2T (TV A2 Threshold)
Default value is 250.
To adjust A2T:
1. To enter SDAM, press 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 AUDIO sub menu.
3. Press the MENU LEFT/RIGHT keys to enter the AUDIO sub menu.
4. Use the MENU UP/DOWN keys to select A2T.
5. Use the MENU LEFT/RIGHT keys to adjust the value of A2T to 250.
6. Press the MENU button to return to the top level SDAM menu.
7. To ensure the A2T setting is saved:
Turn the television set 'off' by using the 'POWER' button on the remote control
transmitter or the local keyboard.
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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
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