XOCECO PH-50T18, Service Manual

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offset_R to 128, adjust offset_G and offset_B, let the color coordinate of the third level be 285 and
290 and its brightness be 4.5-5nit. Fixed gain_B to 128, Adjust gain_R and gain_G, let the color
coordinate of seventh level be 285 and 290. Adjust offset_G and offset_B and gain_R and gain_G
repeatedly until the value of the two levels gray-scale to 285 and 290.
c. Select 12000k of “mode”, fixed offset_R to 128, adjust offset_G and offset_B, let the color
coordinate of the third level be 270 and 283 and its brightness be 4.5-5nit. Fixed gain_B to 128,
Adjust gain_R and gain_G, let the color coordinate of seventh level be 270 and 283. Adjust offset_G
and offset_B and gain_R and gain_G repeatedly until the value of the two levels gray-scale to 270
and 283.
d. Input 8 level gray-scale signal of TIME392 (480p), TIME394 (720p) and TIME396 (1080i) mode,
repeatedly it until the second color coordinate to 285 and 290 and brightness to 2.3nit.
3.2.6 white balance adjustment of HDMI channel
Input VG-849 (1080i) and 720p HDMI signal, Select 9300k of “mode”, fixed offset_R to 128, adjust
offset_G and offset_B, let the color coordinate of the third level be 285 and 290 and its brightness
be 4.5-5nit. Fixed gain_B to 128, Adjust gain_R and gain_G, let the color coordinate of seventh level
be 285 and 290. Adjust offset_G and offset_B and gain_R and gain_G repeatedly until the value of
the two levels gray-scale to 285 and 290.
Select 12000k of “mode”, fixed offset_R to 128, adjust offset_G and offset_B, let the color
coordinate of the third level be 270 and 283 and its brightness be 4.5-5nit. Fixed gain_B to 128,
Adjust gain_R and gain_G, let the color coordinate of seventh level be 270 and 283. Adjust offset_G
and offset_B and gain_R and gain_G repeatedly until the value of the two levels gray-scale to 270
and 283.
3.3 Performance check
3.3.1 TV function
Enter searching menu
→ auto search, connect RF-TV terminal with central signal source and check
if there are channels be skipped
3.3.2 AV/S, YPbPr and HDMI terminals
Input AV/S, HD and HDMI signal, check if it is normal.
3.3.3 VGA terminal
Connect to VGA terminal, input VGA format signal of 640 X 480@60 Hz, check if the display is
normal. If the picture still interference, please auto adjustment the picture until it is normal.
3.3.4 DVI terminal
Insert DVI terminal, input signal of 640 X 480@60 Hz signal and check if the display is normal.
3.3.5 Check sound channel
Check the speaker and headphone of each channel.
3.3.6 presetting before ex-factory
Item Setting Item Setting Item Setting
Picture mode Sport OSD language English BALANCE +00
Sound mode NEWS VGA color
temperature
Warm Turn on
mode
Off
SCREEN Fill all