Philips 202P4, Service Manual

Page: 24 / 121

24 202P4 M25P
Electrical Adjustments (Continued)
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.
7.1 Connect the video input, set brightness control at 50%
and contrast at minimum position (OSD), Vg2 at Minimum
(counter clockwise, and ABL (OSD) at 50% position.
Slowly increase Vg2 voltage until light output is at
0.1 Ft-L +/- 0.01Ft-L (Y=0.1 Ft-L, on the screen of CA-
100).
7.2 (The screen of monitor is dark now)
: Press " " to show the OSD menu as shown in Fig. 2.1.
: Select the character "FACTORY MODE" to access the
R/G/B adjustment as shown in Fig. 2.2 and Fig. 2.3.
: Adjust the cutoff of R/G/B to get 9300K
(x=0.283 +/- 0.015, y=0.298 +/- 0.015), and brightness
output at 0.07 +/- 0.01 Ft-L (Y=0.07Ft-L).
7.3 : Press " " to set contrast at maximum (100%).
: Adjust gain of R/G/B to get 9300K
(x=0.283 +/- 0.015, y=0.298 +/-0.015, don't care about
the Y value)
7.4 Apply a small white square 10 x 10 cm pattern, brightness
set to center (50%), and contrast at maximum (100%),
adjust Sub-contrast control (OSD) to reach 34 +/- 1 Ft-L.
7.5 Apply full white pattern at 9300K, adjust ABL (OSD) to
reach 32+/- 1 Ft-L (contrast at maximum 100%,
brightness at center 50%).
BIAS R G B : R(red) G(green) B(blue) cutoff
GAIN R G B : R(red) G(green) B(blue) gain
SRGB:R(red) G(green) B(blue) Colour Space for Storage.
V FOCUS : Vertical Focus
H FOCUS : Horizontal Focus
VLIN BAL : Vertical Linearity Balance
USER
: Horizontal size range
RASTER H: Horizontal raster Shift
RASTER V: Vertical raster Shift
HLIN
: Horizontal Linearity
V LIN : Vertical Linearity
SUB : Zoom Control range
SUB : Sub Contrast
V OFFSET : Vertical offset
V GAIN
: Vertical Gain
ABL : Auto Beam Limit
T CORNER: Corner Correction of TOP
B CORNER: Corner Correction of BOTTOM
D CONVERGENCE: Digital CONVERGENCE(RESERVED).
NS PURITY:NS PURITY Correction
6 To leave factory mode
* 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).
TIMER Set OSD display time.
5500 K
R cutoff = 30%, R gain = 70% (I C)
G cutoff = 30%, G gain = 70% (I C)
B cutoff = 30%, B gain = 70% (I C)
2
2
2
2
2
2
2
2
2
°
7. Alignment of Vg2 cut-off point, white tracking (OSD
control)
Equipment : 1. Video Test Generator-801GC (Quantum
Data)
2. Color-analyzer (Minolta CA-100)
VG2 [(screen), at the bottom of the L.O.T.].
* Apply a video signal in the 1024 x 768 with 69 kHz/85 Hz
mode,
select the "full white pattern" (sizes 392 x 294 mm).
* Use color-analyzer (Minolta CA-100) to adjust cutoff and
white uniformity.
OSD R/G/B cut-off and R/G/B gain can be accessed, with
initial data:
9300 K
R cutoff = 30%, R gain = 70% (I C)
G cutoff = 30%, G gain = 70% (I C)
B cutoff = 30%, B gain = 70% (I C)
6500 K
R cutoff = 30%, R gain = 70% (I C)
G cutoff = 30%, G gain = 70% (I C)
B cutoff = 30%, B gain = 70% (I C)
Brightness = 50%, Sub-Contrast = 90%, ABL = 50% (I C)
Step 1: To select the character "FACTORY MODE" as shown
in Fig. 2.1, press " " to access the OSD menu for
R/G/B gain & cutoff as shown in Fig. 2.2.
Step 2: Press " " for function selection as shown in Fig
2.3.
Step 3: Use " " to increase or decrease the value as
shown in Fig. 2.3.
°
°
2
After pressing " “ ,then Press " "
Fig.2.1
Fig. 2.2
MODEL SELECT
Factory
Mode
Indicator
CM25 PLUS V0.55 20011128
00195
9300 BIAS R G B GAIN R G B
6500 BIAS R G B GAIN R G B
5500 BIAS R G B GAIN R G B
SRGB BIAS R G B GAIN R G B
FOCUS(H V) VLINBAL USER
RASTER(H V) LIN ( H V ) SUB
V(OFFSET
GAIN) SUB
CORNER(T B) ABL
D CONVERGENCE NS PURITY
EXIT
152
Fig. 2.3
(for example: 152 is value of "BIAS R")
9300 BIAS R G B GAIN R G B
6500 BIAS R G B GAIN R G B
5500 BIAS R G B GAIN R G B
SRGB BIAS R G B GAIN R G B
FOCUS(H V) VLINBAL USER
RASTER(H V) LIN ( H V ) SUB
V(OFFSET
GAIN) SUB
CORNER(T B) ABL
D CONVERGENCE NS PURITY
EXIT
152