XOCECO PS-32HU35, Service Manual

4 

set ISP back to 0. If the picture can’t display when upgrading, it needs to weld JB1 on the main 
board. Please disconnect JB1 again after upgrading. 
 
3.1 Initialization 
Enter factory menu, select “OPTION”, “EEPROM” and “HOTEL OPTION” sub-menu, adjustment of 
items to see table1. 

Table1 sub-menu adjustment 

Items Preset 

Introduce 

HOTEL 

0 

ON: HOTEL OPTION of factory menu is optional 

OFF: HOTEL OPTION of factory menu is not optional 

LOGO   

1 

ON: display LOGO in no signal or turn on 

OFF: no LOGO display 

ADC PRESCALE 

02E 

Software will preset the data according the unit and the data can be adjusted when 

needed. 

SIF PRESCALE 

02E 

Software will preset the data according the unit and the data can be adjusted when 

needed. 

BACK LIGHT 

FF 

Software will preset the data according the panel and the data can be adjusted 

when needed. 

ALL COLOR 

1 

1: white balance of each channel auto offset based on the HDMI white balance 

0: white balance of each channel adjust the offset base separately   

EEPROM-MEMORAY 

RECALL 

> 

EEPROM Initialization (operate when EEPROM data chaos) 

 
3.2 Adjustment for AFT voltage and AGC voltage of IF channel in TV 
3.2.1 IF AFT adjustment 

Enter the factory menu and set IF VCO to LL, or press “INPUT”, “2”, “5”,”8”, “1” to enter VCO 

adjust mode, adjust L109 to value 2.5V of TP104 (A face), then set IF VCO to BG. 
3.2.2 IF AGC adjustment 

Input 184.25MHz RF signal of 60DB from RF terminal, adjust RP101 to value 3V of TP101 (A 

face) and there should be no obvious snowy picture. Increase the signal to 90DBV and it should be 
display normally and no obvious noise. 
3.3 White balance adjustment 
3.3.1 white balance adjustment of HDMI 

a. Input VG-848 signal from HDMI: TIMING854(800* 600/60Hz) and eighth level gray-scale 

signal of PAT920. Use color analyzer CA100 to adjust white balance. 

b. Enter submenu of COLOR TEMP., Select 9300k of color temperature 
c. Fixed value of B OFF, adjust R OFF and G OFF, let the color coordinate of the second level 

be 285,293 and the brightness be about 3nit- 6nit. Fixed value of B GAIN, adjust R GAIN and G 
GAIN, let the color coordinate of seventh level be 285,293. Adjustment R OFF, G OFF, R GAIN and 
G GAIN repeatedly until the value of the two levels gray-scale be 285, 293. 
3.3.2 VGA/YPBPR/AV white balance check and correction 

a. Input VG-848 signal of VGA: TIMING854(800* 600/60Hz) (PATIERN:CROSS) and auto 

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