No Color; No Vertical Deflection - Daewoo DTQ-14J4FC Service Manual

5. NO COLOR

Check
C.V.S waveform
composite video in
R/G/B signal

6. NO VERTICAL DEFLECTION

5V
C507
C508
Check
the voltage
( 2.5V )
#44
Check
the voltage
#18
RGB Vcc (9V)
#19
R OUT
#20
G OUT
#21
B OUT
Check
Check
the voltage
#43
Video/Chroma/Deflection Vcc
I101
#24
V RAMP ALC filter
#23
Vertical output
Check
vertical output signal
#43
#38
I101
Vertical IC Vcc (25V)
X502
C307
#5
(Invert RAMP in)
#3
(Output)
Vertical
D.Y.
Check
the waveform
If no output,
then change I301
25
TROUBLESHOOTING GUIDE
Check
the voltage
Video/Chroma/Deflection Vcc
Check
the crystal
X502
Check
the voltage (25V)
#6
I301
LA7841