Daewoo DTU-14XX ME Service Manual page 49

TROUBLE SHOOTING CHARTS
4. NO PICTURE
CHECK
28,29 OF I701
ABNORMAL
CHANGE INPUT MODE
RF --> AV --> RF
CHECK CHECK SIGNAL AT
AV Signal IF OF TUNER
ABNORMAL
CHECK
Connection of AV JACK
NORMAL
ABNORMAL
NORMAL
CHECK SIGNAL OUT AT
R,G,B OF I701
CHECK/REPLACE
SCL, SDA, B+
OF TUNER
CHECK SIGNAL AT
R,G,B INPUT AND
R,G,B OUTPUT OF I901
ABNORMAL
CHECK
189V Line Heater Voltage
NORMAL
CHECK/REPLACE
CRT
-48-
ABNORMAL
CHECK / REPLACE
I701
NORMAL
NORMAL