Service manual

Page 43 of 64

11、Check and Measure

11-1 Image board

11-1-1 Power Check and Measure

Supply with getting red arrow point three interface J43, J40 and J44 that identification come out for power,

image of board with the interface among having picture, it corresponding power make detection method separately

among following several picture.：

①. In the following the first picture it is successively 1 to 9 pin of J43 from left to right: Among them, 3pin ,

7pin, 8pin and 9pin are digital earth , 4pin, 5pin and 6pin connect 5V voltage, 1pin and 2pin connect 9V

voltage.

The second picture it is 1 to 5 pin of CN704 from left to right: Among them,2pin and 4pin of CN704 connect

digital earth, 1pin of CN704 connect D6V voltage, 3pin of CN704 connect D12V voltage ,The following

picture shows:

Remark: This interface for LG power

②. In the following picture it is successively 1 to 11 pin of J40 from left to right. Among them, The second pin

connects STB5V，3pin, 6pin, 7pin and 10pin are grounded digitally, 5pin connect D12V voltage, 8pin and

9pin connect D3.3V voltage,11pin connect D6V voltage .The following picture shows:

①

②

③

④

5V GND GND