No Vertical Deflection - DAEWOO ELECTRONICS DTQ-14V1FC Service Manual

5. NO COLOR 5. NO COLOR

6. NO VERTICAL DEFLECTION

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