Philips 15MF605T/17, Руководство по обслуживанию

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Magnavox LCD TV
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Electrical instruction(15MF607T/17)
1.General points
1.1 During the test and measuring, supply a distortion free AC mains
Voltage to the apparatus via an isolated transformer with low
Internal resistance.
1.2 All measurements mentioned hereafter are carried out at a normal
mains voltage (90 - 132 VAC for USA version, 195 -264 VAC for
EUROPEAN version, or 90 - 264 VAC for the model with full range
power supply, unless otherwise stated.)
1.3 All voltages are to be measurement or applied with respect to
ground, unless otherwise stated.
1.4 The test has to be done on a complete set including LCD panel in a
room with temperature of 25 +/- 5 degree C.
1.5 All values mentioned in these test instruction are only applicable of
a Well aligned apparatus, with correct signal.
1.6 The letters symbols (B) and (S) placed behind the test instruction
Denotes (B): carried out 100% inspection at assembly line
(S): carried out test by sampling
1.7 The white balance (color temperature), has to be tested in subdued
Lighted room.
1.8 Repetitive power on/off cycle are allowed except it should be
avoided within 6 sec.
2. Input signal
2.1.1 PC Signal type
Analog Video : 0.7 Vp-p linear, positive polarity
Separate Sync. : TTL level, separate, positive or negative polarity
Audio signal : Mini-jack audio input
Input level: 500 mVrms ((Speaker outpout 3W when Input level
> 630mVrms and Volume control at 100%))
Signal source: pattern generator format as attachment
(table 1 to 11) Reference generator : CHROMA 2200 or 2250
2.1.2 TV Signal type
RF Signal : Aerial input, NTSC cable and antenna system.
Video signal : Cinch input, CVBS with NTSC and PAL system.
Level: 1.0Vp-p (0.7V video + 0.3V sync.)
S video input: Y/C signal, NTSC and PAL system.
Level: Y: 1.0Vp-p (0.7V video + 0.3V sync.)
C: +/- 0.3V.
Component input: Cinch G/B/R-> YPbPr cinch input.
Level: Y: 1.0Vp-p Pb/Pr: +/- 0.35V
Audio signal : Side cinch R/L for CVBS and S-video
Bottom cinch R/L for component input.
Input level: 500 mVrms ((Speaker outpout 3W when Input level
> 630mVrms and Volume control at 100%))
2.2 PC Input signal mode
PRE-LOAD VIDEO RESOLUTION
Mode 3, 6, 7, 10 are preset modes that should pass QA inspection.
Mode 1, 2, 4, 5, 8, 9, 11 will run auto adjustment only, and W/O QA
checking.
Dot rate (MHz) H.freq Mode Resolution V.freq (Hz)
1 25.175 31.469 IBM VGA 640 * 350 70.087
2 28.322 31.469 IBM VGA 720 * 400 70.087
3 25.175 31.469 IBM VGA 640 * 480 59.940
4 30.240 35.000 MACINTOSH 640 * 480 66.667
5 31.500 37.500 VESA 640 * 480 75.000
6 36.000 35.156 VESA 800 * 600 56.250
7 40.000 37.879 VESA 800 * 600 60.317
8 49.500 46.875 VESA 800 * 600 75.000
9 57.300 49.700 MACINTOSH 832 * 624 75.000
10 65.000 48.363 VESA 1024 * 768 60.004
11 78.750 60.023 VESA 1024 * 768 75.029
2.3 TV input signal Channel and pattern for Nafta model (Table1)
Signal Distribution Table ( NTSC)
Table 1
3. TV mode display adjust ment
3.1 White balance adjustment (B)
General set-up :
Equipment Requirements: Color analyzer.
Input requirements:
Input Signal Type : CVBS-NTSC signal.
Frequency = 187.25 MHz (CH. 9).
Alignment method:
Initial Set-up :
Set TV (7119) Brightness=124; Contrast=64, Saturate= 70 in
Factory mode (can be fine tuned)
Set Smart picture as Personal (Brightness=50, Color=50,
Contrast=50)
Apply 100% Full White/100IRE pattern by TV pattern generator.
Alignment
: Adjust the VIDEO SCALER GAIN R G B in Factory
Mode
NORMAL . (See Fig 1.)
[ Enter factory menu : press Volume - and keys together
around six seconds]
The 1931 CIE chromaticity (X, Y) co-ordinates shall be:
Picture Mode X y
Normal (Original)
0.289
±
0.005 0.304
±
0.005
Table3.1: Readings with Minolta CA-110.
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