LG DU-30LZ30, Service Manual

Page: 15 / 47

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