No Picture - Daewoo DTQ-14J4FC Service Manual

TROUBLESHOOTING GUIDE

2. NO PICTURE

Check the waveform of I101 #46
c
XC701
32.768KHz
d
Z501
Check
RBG signal output
Check
ABL current
Check
the voltages
5V
33V
U102
IF OUT
TUNER
T-DATA T-CLOCK
Check
clock/data signal
#29 #30
AFT
#14
I701
MICOM
#27
SDA
#28
SCL
#10 #11 #12
ST-BY
clock/data signal
5V
Check
the crystal
Check
composite video
#44
C525
#18
Check
RBG Vcc (9V)
I101
#19
#20
#21
#13
SF101
SAW FILTER
#5 #6
#10
#8
Check
IF Vcc (5V)
I101
#11
#12
Check
Check
CHROMA/VER Vcc(5V)
#43
Check
HOR/BUS Vcc(5V)
#25
T402
FBT
22
NG : GO to the figure c
OK : Go the figure d
Check
IF AGC voltage
#3
#4
Check
RF AGC voltage
#46
Z501
4.5M Trap
#44
Check
the waveform
Check
200V LINE
D405
R412
Check
heater voltage
21V
-3V