XOCECO LC-32U26, Service Manual

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3
Alignment instructions
1. Test equipment
PM5518 (video signal generator)
K-7253 (VGA signal generator)
CA210 (white balancer)
2 Alignment flow-chart
The alignment flow-chart is shown as fig-1
Fig-1 adjustment flow-chart
3 Unit adjustments
Connect digital board, CPU board and analog board according to wiring diagram, connect with
power and observe the display.
Method for entering factory menu: press “SLP”, “DSP”, “MENU” and “DSP” in turn to enter factory
menu; press “CH+” and “CH-” to select adjustment items and press “VOL+” and “VOL-” to adjust
value items, press “MENU” to exit.
Note: the white balance adjustment should be done under “nature” picture mode.
3.1 Initialization
Enter factory menu, select “Factory settings” sub-menu, and adjustment for items of table1.
Table1 sub-menu adjustment
Items Range Introduce
PW on LOGO ON/OFF Display 5s LOGO of turn on the TV
NO Sig LOGO ON/OFF If display LOGO in no signal
Black Screen BLUE/BLACK If display blue screen and white noise wave in no signal, setting “BLUE”
Check DDC, HDCP KEY and CPU
Factory initialization setup
IF channel voltage of TV and AGC voltage adjustment
Support format of VGA pre-set
Adjustment for sub-brightness and white balance of VGA/HDMI (color
temperature 6500k, 9300k and 12000k)
Adjustment for sub-brightness and white balance of YPbPr/YcbCr channel
Adjustment for sub-brightness and white balance of VIDEO channel
Preset ex-factory