No Picture - Daewoo DTQ-20U4SC Service Manual

TROUBLESHOOTING GUIDE

2.NO PICTURE

check the waveform of I501 #61
Check
the VOLTAGE
33V
U101
TUNER
T-DATA
#27
I701
MICOM
#10 #11
X701
32.768KHz
Check the crystal
(d)
Check composite video
Check Vsup(+5V)
Check HOUT
Check RGB Signal OUTPUT#38
Check Vsup(+5V)
5V
CVBS
Composite Video
T-CLOCK
Check
clock/data
signal
#28
SDA
#29
SCL
#30
#12
ST-BY
Check clock/data signal
5V
#61
#58
#17
#50 #15
I501
#39
#37
#36
NG : Go to the figure (c)
OK : Go to the figure (d)
#61
I501
VDP3130Y
#4
#3
check Vsup(+3.3V)
T402
FBT
-58-
Appendix
Check
200V LINE
D405
D406
Check
heater voltage