Philips 32PF9968/10 Service Manual page 161

8. Alignments
Index of this chapter:
8.1 General Alignment Conditions
8.2 Hardware Alignments
8.3 Software Alignments
8.4 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
Perform all electrical adjustments under the following
conditions:
• Power supply voltage (depends on region):
– AP-NTSC: 120 V
– AP-PAL-multi: 120 - 230 V
– EU: 230 V / 50 Hz (± 10%).
AC
– LATAM-NTSC: 120 - 230 V
– US: 120 V / 60 Hz (± 10%).
AC
• 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 correct
ground (e.g. measure audio signals in relation to
AUDIO_GND).
Caution: It is not allowed to use heatsinks as ground.
• Test probe: Ri > 10 Mohm, Ci < 20 pF.
• Use an isolated trimmer/screwdriver to perform
alignments.
8.1.1 Alignment Sequence
• First, set the correct options:
– In SAM, select "Options", and then "Option numbers".
– Fill in the option settings for "Group 1" and "Group 2"
according to the set sticker (see also paragraph
"Option Settings").
– Press OK on the remote control before the cursor is
moved to the left.
– In submenu "Option numbers" select "Store" and press
OK on the RC.
OR:
– In main menu, select "Store" again and press OK on
the RC.
– Switch the set to Stand-by.
• Warming up (>15 minutes).
8.2 Hardware Alignments
There are no hardware alignments foreseen for this chassis,
but below find an overview of the most important DC voltages
on the SSB. These can be used for checking proper functioning
of the DC/DC converters, see table 8-1 SSB DC Voltages.
Table 8-1 SSB DC Voltages
Description Test Point
- Audio power FU15
+ Audio power FU16
+5V-standby FU18/FM25
+12V FU19/FM26
+1V2 FU06
+3V3 FU07
+1V8 IHZ3
+5V-ON FU80
+3V3-PI t.b.d.
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or 230 V / 50 Hz (± 10%).
AC AC
/ 50 Hz (± 10%).
AC
/ 50 Hz (± 10%).
AC
Min. Typ. Max. Supply
-11.40 -12.00 -12.60 PSU
+11.40 +12.00 +12.60 PSU
+5.14 +5.20 +5.46 PSU
+11.40 +12.00 +12.60 PSU
+1.20 +1.25 +1.30 DC-DC
+3.15 +3.30 +3.45 DC-DC
t.b.d. +1.80 t.b.d. DC-DC
+4.95 +5.00 +5.30 DC-DC
t.b.d. +3.30 t.b.d. Pro:idiom
Alignments PB52.1HU LA
Description Test Point
+3V3-standby FU86
+1V2-standby FU85
+3V3-MP4 FAK5
+2V6-MP4 FAKC
+1V1 FAK1
+12V1 F230
8.3 Software Alignments
Put the set in SAM mode (see Chapter 5 "Service Modes, Error
Codes and Fault Finding"). The SAM menu will now appear on
the screen. Select ALIGNMENTS and go to one of the sub
menus. The alignments are explained below.
The following item can be aligned:
• Whitepoint.
To store the data:
• Press OK on the RC before the cursor is moved to the left.
• In main menu select "Store" and press OK on the RC.
• Press MENU on the RC to switch back to the main menu.
• Switch the set 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).
• LATAM models: an NTSC M TV-signal with a signal
strength of at least 1 mV and a frequency of 61.25 MHz
(channel 3).
• DVB-T models: see table "SDM default settings" in chapter
5.
8.3.1 White Point
• Set "Active control" to "Off".
• Choose "TV menu", "TV Settings" and then "Picture" and
put:
– "Dynamic contrast" to "Off".
– "Color enhancement" to "Off".
– "Light sensor" to "Off" where applicable.
– "Clear LCD" to "On" where applicable.
– "Brightness" to "50".
– "Color" to "0".
– "Contrast" to "100".
• Go to the SAM and select "Alignments"-> "Whitepoint".
White point alignment LCD screens:
• Use a 100% white screen as input signal and set the
following values:
– "Color temperature": "Normal".
– All "Whitepoint" values to: "127".
– "Red BL offset" values to "8".
– "Green BL offset" values to "8".
In case you have a color analyzer:
• Measure with a calibrated (phosphor- independent) color
analyzer in the centre of 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 127) 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"). Tolerance: dx: ± 0.004, dy: ± 0.004.
8. EN 161
Min. Typ. Max. Supply
+3.15 +3.30 +3.45 DC-DC
+1.20 +1.25 +1.30 DC-DC
+3.15 +3.30 +3.45 ST
+2.50 +2.60 +2.70 ST
+1.05 +1.10 +1.15 ST
+11.40 +12.00 +12.60 I-board