XOCECO PH-50HU31S, Service Manual

5 

adjust to full screen, then input PAT948 black/white signal, enter factory menu ADC ADJ, select 
AUTOTUNE and wait for OK display. Input PAT920(8 gray levels), check if the white balance is 
normal, if not, set ALL COLOR to 0 and fine adjust according the method of 3.3.1 

b. connect VG-848 signal of YPBPR to YPBPR terminal and input TIMING972(1080i/60HZ) 

color bar of PAT908(include black/white bar), Enter submenu of ADC ADJ, Select AUTOTUNE and 
wait for OK display. Input PAT920(8 gray levels), check if the white balance is normal, if not, set ALL 
COLOR to 0 and fine adjust according the method of 3.3.2 

c. Input AV signal(PM5518, 8 gray levels) to VIDEO terminal, check if the white balance is 

normal, if not, set ALL COLOR to 0 and fine adjust according the method of 3.3.2     

Note

: it can’t set back to 1 once ALL COLOR changes to 0. 

4 Software upgrade   

When software upgrading please enter factory menu first, enter ISP of OPTION, set ISP to 1 and 
you can begin to upgrade. After upgrade finished, it needs to set ISP back to 0. If the picture can’t 
display when upgrading, it needs to web J1 of 01S board. Please disconnect J1 again after 
upgrading. 

5 Performance check 

5.1 TV function 
Enter searching menu 

→

 auto search, connect RF-TV terminal with central signal source and check 

if the picture is normal, if there are channels be skipped. Check TXT and parental control.   
5.2 AV/S, YpbPr terminals   
Input AV/S, YPbPr/YCbCr HD signal, check if it is normal. 
5.3 VGA terminal 
Insert VGA terminal, input VGA format signal of 640X480@60 Hz and check if the display is normal.   
5.4 HDMI terminal 
Insert HDMI terminal, input signal of 640 X 480@60 Hz signal and check if the display is normal. 
5.5 check sound channel 
Check the speaker and headphone of each channel. 
5.6 RS232 terminal 
Insert earphone to COM terminal and check if the long-distance control function is normal. 
5.7 other function check 
Check the turn on/turn off timer, asleep timer, picture/sound mode, OSD, freeze/mute, stereo, ect. 
5.8 presetting before ex-factory 

Item Setting  Item 

Setting 

Item  Setting 

PICTURE MODE 

STANDARD 

BALANCE 

50 

OSD LANGUAGE 

English 

COLOR MODE 

NORMAL 

VOLUME 50 

OSD 

HPOSITION 

50 

NR WEAK 

SLEEP 

TIMER 

OFF 

OSD 

VPOSITION 

50 

ZOOM 

FULL   

TTX LANGUAGE

WEST 

OSD HALFTONE   

50 

SOUND MODE 

STANDARD 

BLUE SCREEN 

OFF 

OSD DURATION   

15 

AVC OFF