Daewoo DVQ-10H1FCN, Service Manual, Page: 40 / 56

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TROUBLESHOOTING GUIDE
2. TV PART
2-1) NO PICTURE
Check the waveform of I501 #46
NG : GO to the figure
a
OK : GO to the figure b
Check
Voltage
a
U102
TUNER
ICS01
TIMER/SYSCON
33V 5V
#65 #67
MDATA
MCLK
Check
Signal
I501
Z101
SAW FILT
IF OUT
#5 #6
#10
#10
AFT
#8
Check
IF Vcc(5V)
#71
#72
SCLK SDATA
#12
#11
Check
Signal
Check
Voltage
#3
#4
#46
#44
Z102
4.5M
TRAP
Check
Waveform
#35 #36 #38 #39
Check
the X-TAL
XS02
S01
#37
#34
Check
Reset
VCC
b
I501
#44
Check
Signal
Z102
C527
#18
Check
Vcc(9V)
#19
#20
#21
Check
RGB Signal
#43
#25
#13
Check
ABL current
T402
FBT
Check
CHROMA Vcc(5V)
Check
HOR. Vcc(5V)
D401
R403
Check
Heater Vp-p
6.2Vrms
Check
150V LINE
X
Appendix