Electrical Adjustments - Philips V20 107E5 Service Manual

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0. General
1. This monitor has 8 factory-preset modes
720 x 400 31.5 kHz/70 Hz
640 x 480 31.5 kHz/60 Hz
640 x 480 43.3 kHz/85 Hz
800 x 600 46.9 kHz/75 Hz
800 x 600 53.6 kHz/85 Hz
1280 x 960 60.0 kHz/60 Hz
1024 x 768 68.7 kHz/85 Hz
1280 x 1024 64.0kHz/60Hz
1.1 14 factory-preload modes as below
640 x 350 31.5 kHz/70 Hz
640 x 350 37.9 kHz/85 Hz
640 x 480 37.5 kHz/75 Hz
640 x 480 37.9 kHz/72.8 Hz
640 x 480 50.6 kHz/100 Hz
720 x 400 37.9 kHz/85 Hz
800 x 600 37.90kHz/60Hz
800 x 600 48.1 kHz/72 Hz
800 x 600 63.9 kHz/100 Hz
832 x 624 49.7 kHz/75 Hz
1024 x 768 48.4 kHz/60 Hz
1024 x 768 56.5 kHz/70 Hz
1152 x 864 67.5 kHz/75 Hz
1024x768 60.0 kHz/75 Hz
2. AC/DC Measurement:
The measurements for AC waveform and DC figure is based on 640 x
480 31.5 kHz/60 Hz resolution mode with test pattern "gray scale".
Power input: 110V AC
3.Monitor the following auxiliary voltages.
+5V source across 7153 Pin out and GND
+6.1V source across C2154
+12V source across C2155
-12V source across C2156
+50V source across C2152
-190V source across C2630
+83V source across C2153 ( + to Gnd)
4. General conditions for alignment
4.1 During all alignments, supply a distortion free AC mains voltage
to set via an isolating transformer with low internal impedance.
4.2 Align in pre-warmed condition, at least 30 minutes warm-up with
nominal picture brightness.
4.3 Purity, geometry and subsequent alignments should be carried
out in magnetic cage with correct magnetic field.
Northern hemisphere : H=0, V=450 mG, Z=0
Southern hemisphere : H=0, V=-500 mG, Z=0
Equatorial Support : H=0, V=0
4.4 All voltages are to be measured or applied with respect to ground.
Note: Do not use heatsink as ground.
4.5 Adjust brightness controls to center position except for contrast
control which should be set to MAX.
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Electrical Adjustments

as below.
+5V +/- 0.25 VDC
+6.1V +/- 0.3 VDC
+12.9V +/- 1.0 VDC
-12.7V +/- 1.0 VDC
+50V +/- 1.0 VDC
-173V +/- 10.0 VDC
+76V +/- 2.0 VDC
mG, Z=0
5. To access factory mode
5.1 Turn off monitor (don't turn off PC)
5.2 Press '" " and " " simultaneously on the front control
panel,then press " ",wait till the OSD menu with characters
M32 107E/T4P V1.23 20020426 (below OSD menu)" come on the
screen of monitor.
MODEL SELECT
Factory
Mode
Indicator
V20 107E5 V0.20 20021217
5.3 If OSD menu disappears on the screen of monitor, press "
again (anytime), then the OSD menu comes on the screen again.
5.4 Using " " : to select OSD menu.
5.5 Using " " : to increase or decrease the setting.
5.6 Using " " to access/confirm the selection.
To leave factory mode
5.7 After alignment of factory mode, turn off monitor (if you do not
turn off monitor, the OSD menu is always at the factory mode),
then turn on monitor again (at this moment, the OSD menu goes
back to user mode).
6. Picture geometry setting
- Apply a video signal with cross-hatch pattern.
- Apply a video signal in the 1024 x 768 with 68.7 kHz/85 Hz mode.
- Set contrast control at Max. position, and brightness control in the
mid-point.
6.4 Alignment of horizontal geometry and vertical geometry
6.4.1 Adjust the H-width to 306 mm
6.4.2 Adjust the H-phase to center position.
6.4.3 Adjust V-size to 230mm.
6.4.4 Adjust V-Position to center.
Adjust/Trapezoid/pincushion/balance pincushion/paralleogram
6.4.5 Adjust picture tilt via I C BUS for correct top/bottom lines. 2
6.4.6 Adjust the top and bottom corner by I C to get optimum
corner geometry.
6.4.7 Adjust the parallelogram by I CBUS to get optimum vertical line.
6.4.8 Adjust the balance pincushion by I C BUS to get optimum
vertical line.
6.4.9 Adjust the trapezoid to get optimum vertical line.
6.5 Adjust size/centering/trapezium/pincushion/parallelogram
of all other preset modes via I C bus.
(to repeat from step 6.4.1 to step 6.4.9)
V20 107E5 27
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