DAYTEK LC1508NT, Service Manual

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ADJUSTMENT MANUAL
Ⅰ
. TEST NOTE
1.
Please follow the pointed test steps and choose the right test equipment to conduct
adjustment, otherwise good effect of Unit could not be obtained. The unit should be
warmed up for 30 minutes before adjustment and every parameter should be adjusted
repeatedly till the optimum value obtained, the pointed voltage value should be ensured
during test to get satisfied test result.
2. Test environment
1) Temperature
：
15
°
C-35
°
C
2) Relative Humidity : 45-75%
3) Air pressure : 86-106KPa
3 Test equipments
（
The following equipment should be calibrated before testing
）
1) Computer 1 set
2) Multi-meter (VICTOR VC9801) 1 set
3) Video Signal Generator (Chroma Model 2227/2327) 1 set
4) Color Analyzer (Chroma Model 7120 ) 1 set
5) DDC card (DYNACOLOR, INC D8330) 1 slice
6) TV Video Signal Generator (
FLUKE PM54200
) 1 set
4 Factory mode adjustment
4.1 Enter factory mode adjustment
Using the remote control, press Menu button once first , then press PRE.CH(or named
RECALL) button five times,and you can see manufacture menu on the LCD panel.
4.2 factory menu operation method
Press the c/- button to selection the sub menu of factory menu
（
including F
、
E
、
UOC
Ⅲ、
RGBTemp
、
Temp
）
, and press the vol+ to enter the sub menu and setting the value.
4.3 exit the factory menu
Press the MUTE button again and again or turn off the TV, it can exit the factory menu.
4.4 AGC adjustment
In TV mode,Receive 60dB split field signal.Enter factory mode menu
“
UOC
Ⅲ
”
item,
press
”
CHAN
▽
”
to select
“
RF AGC
”
，
then use VOL+/- to adjust the item until the voltage of Pin
1 of N100 to be about 2.5V
±
0.2V,then noise wave of the picture point disappears.
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