Sanyo LCD-42XR8KH, Service Manual

4 

SIF PRESCALE 

000 

adjust according the power consumption 

BACK LIGHT 

28 

Adjust according the screen 

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   

ISP 

0 

0: no upgrade on line 

1: upgrade on line 

NO STANDY 

00 

01: turn on      00: memory function of turn on      10: standby 

INIT VOLUME 

0-100 

Volume when turn on 

INIT CHANNEL 

1-200 

Channel when turn on 

INIT SRC 

Program source 

Input Source when turn on 

EEPROM-MEMORAY 

RECALL 

> 

EEPROM Initialization (operate when EEPROM data chaos) 

 
3.2 Adjustment for AFT and AGC of IF channel in TV   
3.2.1 IF AFT adjustment   
Disconnect J601(B face), input 80dB 38.9MHz PAL signal to the pole of J601 near the socket, 
adjust L604 to value 1.65V of TP602, enter the factory menu, set TDA4470 from BG to LL and input 
80dB 33.9MHz SECAM signal, adjust RP602 to value 1.65V of TP602, then weld J601. 
3.2.2 IF AGC adjustment 
Input 184.25MHz RF signal of 60dB to RF terminal, adjust RP601 to value 4V of TP604, and there 
should be no obvious snowy picture. Increase the input signal to 90dBV and it should be no obvious 
noisy. 
3.3 White balance adjustment 
3.3.1 HDMI white balance adjustment 

a. Input VG-848 signal to HDMI: TIMING854(800*600/60Hz)of PAT920 8 gray scale signal, 

adjust the balance with CA210. 

b.  Enter COLOR TEMP sub menu and select color temperature of standard (9300K), the 

value of coordinate is recommended. 

c.  Fixed B GAIN, adjust R GAIN, G GAIN to let the color coordinate of the seventh level be 

(285,293); Fixed BOFF, adjust R OFF, G OFF to let the color coordinate of the second level be 
(285,293) and the brightness is about 3nit-10nit. Repeat adjust R GAIN, G GAIN, R OFF and G OFF, 
until the color coordinate of the two level gray scale be (285,293).   
3.3.2 VGA/YPbPr/ AV white balance check and correct 

a. Connect VG-848 signal of VGA to VGA terminal and input TIMING854 (800*600/60HZ) 

(PATTERN: CROSS), and auto adjust to full screen then input PAT948 white and black signal, 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 3.3.1 

b. connect VG-848 YPbPr signal to YPbPr terminal and input TIMING972(1080I/60Hz) PAT908 

color bar(include back/white bars), 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 scale) to VIDEO terminal and check if the white balance is 

cc.  nput AV

n

np

nal(PM

M5518 8 graay scale) to VIDEO term

nd check if the w

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