Philips 32PF9968/10 Service Manual page 72

EN 72 8. LC4.8L LA
8.3.2 Tuner
Purpose: To keep the tuner output signal constant as the input
signal amplitude varies.
AGC (RF AGC Take Over Point) alignment:
• Activate the SAM menu.
• Go to the sub-menu "Tuner".
• Select the "AGC" sub-menu.
• Set the "AGC" value to "27" (default).
• Set the "IFPLL" value to "32" (default).
• Switch the set to "Stand-by" to store the data.
8.3.3 White Tone
Before alignment, set:
• "Brightness" to "60".
• "Color" to "50".
• "Contrast" to "60".
• "Contrast+" to "Off".
• "Active CTR" to "Off" (via RC).
• "Auto Picture" to "Soft"
Alignment:
• Activate SAM.
• Select "White Tone" and choose a color temperature.
• Use a 100% white screen as input signal and set the
following values: All "White point" values initial to "180" for
Non-Pixel-Plus sets and "245" for Pixel-Plus sets.
In case you have a color analyzer:
• Measure with a calibrated (phosphor- independent) color
analyzer (e.g. Minolta CA-210) in the centre of the screen
(for LCD the analyzer may not touch the screen).
Consequently, the measurement needs to be done in a
dark environment.
• Adjust the correct x,y coordinates (while holding one of the
White point registers R, G or B on the initial value) by
means of decreasing the value of one or two other white
points to the correct x,y coordinates (see table "White D
alignment values").
• Repeat this step for the other color Temperatures that need
to be aligned.
• When finished return to the SAM root menu and press
STANDBY on the RC to store the aligned values to the
NVM.
Table 8-1 White D alignment values
Tint Temp (K)
Warm 6500
Normal 9300
Cool 11000
Tolerance
If you do not have a color analyzer, you can use the default
values. This is the next best solution. The default values are
average values coming from production (statistics).
• Set the RED, GREEN and BLUE default values per
temperature according to the values in the "Tint settings"
table.
• When finished return to the SAM root menu and press
STANDBY on the RC to store the aligned values to the
NVM.
Table 8-2 Tint settings for Non Pixel-Plus sets
Tint Temp (K)
Warm 6500
Normal 9300
Cool 11000
Tolerance 10%
Alignments
x y
0.310 0.328
0.283 0.290
0.273 0.280
0.004 0.004
R - offset G - offset B - offset
Rnorm + 5 Gnorm + 0 Bnorm - 25
200 (32") 200 (32") 192 (32")
Rnorm - 10 Gnorm - 8 Bnorm + 0
0.008 0.008 0.008
Table 8-3 Tint settings for Pixel-Plus sets (37" and 42")
Tint Temp (K)
Warm 6500
Normal 9300
Cool 11000
Tolerance 10%
8.3.4 Audio
No adjustments necessary.
8.3.5 ADC Gain and Grey Scale Alignment
The table below shows a number of NVM settings used for
each model of TV set. Be sure to use the correct editor in the
SAM menu (NVM Editor or SC NVM Editor), because the first
one is used for the Hercules NVM, and the second one for the
SCALER (SC) part of the TV set.
Caution:
• Do not change the NVM settings without
understanding the function of each setting, because
incorrect NVM settings may seriously hamper the
correct functioning of the TV set!
• Always write down the existing NVM settings, before
changing the settings. This will enable you to return to the
original settings, if the new settings turn out to be incorrect.
Table 8-4 ADC and Grey Scale gain alignment
SDTV ADC Gain settings: Use the "NVM Editor" in SAM
Setting Hercules NVM Address
(decimal value)
NVM_ADC_GAIN_R 006
NVM_ADC_GAIN_G 007
NVM_ADC_GAIN_B 008
SDTV Greyscale settings: Use the "SC NVM Editor" in SAM
Setting Scaler NVM Address
(decimal value)
ADC_RED_OFFSET2 338
ADC_GRN_OFFSET2 339
ADC_BLU_OFFSET2 340
ADC_RED_GAIN 341
ADC_GRN_GAIN 343
ADC_BLU_GAIN 345
PC Greyscale settings: Use the "SC NVM Editor" in SAM
ADC_RED_OFFSET2 325
ADC_GRN_OFFSET2 326
ADC_BLU_OFFSET2 327
ADC_RED_GAIN 328
ADC_GRN_GAIN 330
ADC_BLU_GAIN 332
HD Greyscale settings: Use the "SC NVM Editor" in SAM
ADC_RED_OFFSET2 351
ADC_GRN_OFFSET2 352
ADC_BLU_OFFSET2 353
ADC_RED_GAIN 354
ADC_GRN_GAIN 356
ADC_BLU_GAIN 358
R - offset G - offset B - offset
Rnorm + 8 Gnorm + 0 Bnorm - 34
240 (37") 248 (37") 232 (37")
251 (42") 251 (42") 251 (42")
Rnorm - 13 Gnorm - 10 Bnorm + 0
0.008 0.008 0.008
145 145
185 185
165 165
80 32
80 30
80 36
70 71
70 75
70 68
70 66
70 65
70 68
215 219
215 231
215 227
64 64
75 78
64 64
160 153
160 157
160 139
145
185
165
32
30
36
71
75
68
66
65
68
219
231
227
64
78
64
153
157
139