No Color; No Vertical Deflection - Daewoo DTQ-20D5FSN Service Manual

APPENDIX
TROUBLESHOOTING GUIDE

5. NO COLOR

Check
C.V.S waveform
composite video in
Check
the voltage
RGB Vcc (9V)
Check
R/G/B signal

6. NO VERTICAL DEFLECTION

5V
C507
#24
C508
V RAMP ALC filter
Check
the voltage
( 2.5V )
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#44
I101
#18
#19
R OUT
#20
G OUT
#21
B OUT
Check
the voltage
#43
Video/Chroma/Deflection Vcc
I101
X502
#23
Vertical output
Check
Vertical
vertical output signal
D.Y.
15
Check
the voltage
#43
Video/Chroma/Deflection Vcc
the crystal
#38
X502
Check
the voltage (25V)
Vertical IC Vcc (25V)
#6
I301
C307
LA7841
#5
(Invert RAMP in)
#2
(Output)
Check
the waveform
If no output,
then change I301
Check