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LG Flatron F720B Service Manual page 19

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NO OSD
CHECK
IC302 B +
(5V) ?
DC 5V
YES
CHECK
IC302 PIN 1, 24
WAVEFORM?
Pin 1
5V
YES
Pin 24
TROUBLE IN
OSD PERIPHERAL
CIRCUIT
7. TROUBLE IN OSD
(ENTER BUTTON MUST BE PRESSED.)
NO
NO
- 19 -
TROUBLE IN
5V LINE
TROUBLE IN
IC401 PIN 29 (V-FBP),
IC701 PIN 1LINE (H-FBP)
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