Trouble in osd – LG 773N User Manual
Page 18
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7. TROUBLE IN OSD
TROUBLE IN
OSD PERIPHERAL
CIRCUIT
NO OSD
TROUBLE IN
5V LINE
TROUBLE IN
IC601 PIN1 (V-FBP),
T701 40V LINE (H-FBP)
TROUBLE IN
IC302, IC301
TROUBLE IN
IC301, IC302
NO
YES
DC 5V
YES
YES
YES
NO
NO
NO
Pin 5
5V
Pin 10
5V
H+V
5V
H+V
CHECK
IC301 B+
(5V) ?
CHECK
IC301 PIN 12
WAVEFORM ?
(ENTER BUTTON MUST BE PRESSED.)
CHECK
IC301 PIN 5, 10
WAVEFORM?
CHECK
IC301 PIN 13, 14, 15 ?
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