LG KF-20P31 Service Manual page 26

NO RASTER
Is there about 115V
at pin 3 of T701?
YES
Is there about 8V
at pin 6 of P805?
YES
Does the square
waveform appear at pin 1 of
P805?
YES
Does the waveform
appear at the collector
of Q781?
YES
Is there about
6.3V at HEATER of CPT
AC
SOCKET?
YES
Go to NO PICTURE BLOCK
NO
● Check/Replace F852, D850,
NO
● Check the 8V LINE of VCD
● Check the H-OUT LINE of VCD
NO
● Check/Replace IC501 of VCD
NO
Check/Replace Q782, T781, R783,
NO
CONNECTOR, FR901,FR902.
Go to NO POWER BLOCK
R858, IC853, C863.
BOARD
BOARD.
BOARD.
Q781.
Check/Replace T701, 5PIN
3-13