DAEWOO ELECTRONICS DTQ-14V1FC, Service Manual, Page: 26 / 44

2 25 5
T TROUBL ROUBLES ESHO HOO OT TING ING G GUIDE UIDE
5. NO COLOR 5. NO COLOR
6. NO VERTICAL DEFLECTION 6. NO VERTICAL DEFLECTION
I101 I101
#44 #44
composite video in composite video in
Check Check
C.V.S waveform C.V.S waveform
#43 #43
Video/Chroma/Deflection Vcc Video/Chroma/Deflection Vcc
Check Check
the voltage the voltage
#38 #38
X502 X502
Check Check
the crystal the crystal
#18 #18
#19 #19
#20 #20
#21 #21
RGB Vcc (9V) RGB Vcc (9V)
Check Check
the voltage the voltage
R OUT R OUT
G OUT G OUT
B OUT B OUT
Check Check
R/G/B signal R/G/B signal
#4 #43 3
Video/Chroma/Deflection Vcc Video/Chroma/Deflection Vcc
Check Check
the voltage the voltage
X502 X502
#2 #24 4
C507 C507
C508 C508
V RAMP ALC filter V RAMP ALC filter
5V 5V
Check Check
the voltage the voltage
( 2.5V ) ( 2.5V )
I301 I301
LA7841 LA7841
#2 #23 3
Vertical output Vertical output
#6 #6
Vertical IC Vcc (25V) Vertical IC Vcc (25V)
Check Check
the voltage (25V) the voltage (25V)
#5 #5
(Invert RAMP in) (Invert RAMP in)
#3 #3
C307 C307
(Output) (Output)
Check Check
vertical output signal vertical output signal
Vertical Vertical
D.Y. D.Y.
Check Check
the waveform the waveform
If no output, If no output,
then change I301
then change I301
I101 I101