LG DU-42LZ30 Service Manual page 14

No Raster
Measure standby
voltage:
6V at D_board P810 pin
no. 1
Pass
Measure standby
voltage:
6V at A_board P818
pin no. 6
Pass
Measure standby
voltage:
5V at A_board P820
pin no. 1
Pass
Measure
Supply voltage :
3.3V at D_board P810 pin
no. 7, 6V at pin no 11,
12V at pin no 4
Pass
Measure module T-
con voltage:
12V at D_board
C1401
Pass
Measure
analog supply:
6V and 3.3V at
A_board P818 pin no.
9 and 8, respectively
Check no. power.
(Go to No power)
Fail
Check no. power.
Fail (Go to No power)
Replace A_board
Fail
Check no. power.
(Go to No power)
Fail
Replace D_board
Fail
Replace D_board
Fail
- 14 -
Replace D_board
Pass
Replace A_board
Pass
Replace D_board
Pass