Sanyo LCD-22XR7SN Service Manual page 6

L LOGO LOGO 1
ADC PRESCALE 02E
SIF PRESCALE 02E
BACK LIGHT FF
ALL COLOR 1
EEPROM-MEMORAY >
RECALL
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 1, or press "INPUT", "2", "5","8", "1" to enter VCO
adjust mode, adjust L109 to value 2.5V of TP105 (B face), then set IF VCO to 0.
3.2.2 IF AGC adjustment
Input 60DB RF signal (184.25MHz for Chinese, 175.25MHz for America) to RF terminal,
adjust RP101 to value 3V of TP102 (B 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 j
3 3 1 3.3.1 white balance adjustment of HDMI te bala a nce ce adjus s tm m ent of H
a. Input VG-848 signal from HDMI: TIMING854(800* 600/60Hz) and eighth level gray-scale
signal of PAT920. Use color analyzer CA210 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
normal, if not, enter COLOR TEMP menu, set ALL COLOR to 0 and fine adjust according the
method of 3.3.1 c)
b. connect VG-848 signal of YPBPR to YPBPR terminal and input TIMING972(1080i/60HZ)
100% color bar of PAT976(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 3.3.1 c)
c. Input AV signal(PM5518, 8 gray levels, PAL for Chinese and NTSC for America) to VIDEO 1
terminal, check if the white balance is normal, if not, set ALL COLOR to 0 and fine adjust according
the method of 3.3.1 c)
Note: it can't set back to 1 once ALL COLOR changes to 0.
ON: d ON: display LOGO in no signal or turn on splay LOGO in no
OFF: OFF: no LOGO display LO GO d play
Software will preset the data according the unit and the data can be adjusted when
needed.
Software will preset the data according the unit and the data can be adjusted when
needed.
Software will preset the data according the panel and the data can be adjusted
when needed.
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 Initialization (operate when EEPROM data chaos)
1 hanges to 0.
n on
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