Daewoo DTQ-29S3FC, Service Manual, Page: 43 / 45

18
TROUBLESHOOTING GUIDE
5. NO COLOR
6. NO VERTICAL DEFLECTION
I101
#44
composite video in
Check
C.V.S waveform
#43
Video/Chroma/Deflection Vcc
Check
the voltage
#38
X502
Check
the crystal
#18
#19
#20
#21
RGB Vcc (8.2V)
Check
the voltage
R OUT
G OUT
B OUT
Check
R/G/B signal
#43
Video/Chroma/Deflection Vcc
Check
the voltage
X502
#24
C507
C508
V RAMP ALC filter
5V
Check
the voltage
( 2.5V )
I301
LA7845
#23
Vertical output
#6
Vertical IC Vcc (27V)
Check
the voltage (27V)
#5
(Invert RAMP in)
#3
C307
(Output)
Check
vertical output signal
Vertical
D.Y.
Check
the waveform
If no output,
then change I301
I101
Appendix