Philips EM6E Service Manual page 101

EN 140 8. EM6E AB
White Tone Adjustment: NORMAL
1. Set, via the user menu, the "Contrast" to "100".
2. Go to SAM, select ALIGNMENTS - GENERAL - DRIVE -
TEST PATTERN and turn it ON. During the following
alignments, you will see a white block in the middle of the
screen. Measure with the colour analyser on this area.
3. Set COLOR TEMPERATURE to NORMAL.
4. Pre-adjust the GREEN parameter with the value from the
"Luminance Adjustment".
5. Adjust the RED and BLUE parameters to achieve the right
colour temperature according to the values in table "White
levels".
Note: The WHITE TONE adjustments for the colour
temperatures COOL and WARM have to be done at the end of
the colour alignments, otherwise the correct light output
(luminance adjustment) is not taken into account.
Luminance Adjustment
1. Set, via the user menu, the "Contrast" to "100".
2. Set, via the user menu, the "Sharpness " to "0".
3. Go to SAM, select ALIGNMENTS - GENERAL - DRIVE -
TEST PATTERN and turn it ON. During the following
alignments, you will see a white block in the middle of the
screen. Measure with the colour analyser on this area.
4. Set COLOR TEMPERATURE to NORMAL.
5. Adjust the RED, GREEN, and BLUE parameters equally to
achieve the right light output, according to the values in
table "Luminance levels".
Table 8-5 Luminance levels
CRT size
28 inch RF WS (PDC Mk II)
32 inch RF WS (EMEC)
36 inch RF WS (EMEC)
White Tone Adjustment: COOL and WARM
1. Go to SAM, select ALIGNMENTS - GENERAL - DRIVE -
TEST PATTERN and turn it ON. During the following
alignments, you will see a white block in the middle of the
screen. Measure with the colour analyser on this area.
2. Select a COLOUR TEMPERATURE (e.g. COOL or
WARM).
3. Adjust the RED and BLUE parameters to achieve the right
colour-temperature, according to the values in table "White
levels".
Mathematical values (next paragraph) can be used for COOL
and WARM, but it is recommended to align them.
Adjustment Method Without Colour Analyser
If you do not have a colour analyser, you can use the default
values. This is the next best solution. The default values are
average values coming from production (statistics).
1. Set, via the user menu, the "Contrast" to "100".
2. Go to SAM, select ALIGNMENTS - GENERAL - DRIVE -
CATHODE, and enter the value "15" (for all picture tubes).
3. RED BL OFFSET: the Black Level can be aligned very
precisely here. The default value is "7".
4. GREEN BL OFFSET: the Black Level can be aligned very
precisely here. The default value is "7".
5. Select a COLOUR TEMPERATURE (e.g. COOL,
NORMAL, or WARM).
6. Set the RED, GREEN and BLUE default values according
to the values in the "Tint settings" table.
Table 8-6 Tint settings
Cool
R 36
G 30
B 37
Electrical Alignments
Light output (cd/m2)
450
395
345
Normal Warm
37 40
30 30
31 18
8.3.3
LUM. DEL. (Luminance Delay)
With this alignment, you place the luminance information
exactly on the chrominance information (brightness is pushed
onto the colour). Use a colour bar / grey scale pattern as test
signal.
•
LUM. DELAY PAL BG: Apply a PAL BG colour bar / grey
scale pattern as a test signal. Adjust this parameter until
the transients of the colour part and black and white part of
the test pattern are at the same position. Default value is
"9".
•
LUM. DELAY PAL I: Apply a PAL I colour bar/grey scale
pattern as a test signal. Adjust this parameter until the
transients of the colour part and black and white part of the
test pattern are at the same position. Default value is "9".
•
LUM. DELAY SECAM: Apply a SECAM colour bar/grey
scale pattern as a test signal. Adjust this parameter until
the transients of the colour part and black and white part of
the test pattern are at the same position. Default value is
"11".
•
LUM. DELAY BYPASS: apply a NTSC colour bar/
greyscale pattern as a test signal. Adjust this value until the
transients of the colour and black and white part of the test
area are at the same position. Default value is "10".
8.3.4
GEO-NOR
Note: For all geometry alignments, use an external pattern
generator with a crosshatch pattern.