XOCECO PH-42T8, Service Manual, Page: 6 / 77

4
Alignment instructions
1 Alignment equipment
PM5518 (video signal generator)
K-7253 (VGA signal generator)
CA100 (white balancer)
VG-849
2 Alignment flow-chart
The alignment flow-chart is shown as fig-1
Fig-1 adjustment flow-chart
3 Unit adjustments
3.1 HF board adjustment
Adjust the Potentiometer VR9002 on the power board, measure the test point TP1 (12VAMP) on
the HF board to be 14 V±0.05 V.
3.2 Digital board adjustment
3.2.1 Connect digital board, button board and HF board, turn on the unit, check if display normal.
3.2.2 Enter factory menu mode (service mode)
Press the MENU button, press the number button: 1
→ 9 → 7 → 9, enter factory menu, then use
VOL+/- select item value and CH+/- change it. Press the MENU button exit the factory menu.
Check MEGA8, DDC and FLASH
To produce digital board and HF board
Check the digital board and HF board
All testing
Connect with central signal source, then check each function of TV such as
analog control etc., check the output of headphone and speaker
Input AV/S, HDMI and HD signal, then check each function of all the terminals
Input VGA signal (one format), check if the display is normal under PC
condition, check each function such as analog control etc., check horizontal
/vertical center etc.
Preset ex-factory
Check the accessories and pack them in box