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4-4 No BNC Video

Does 3.3 V appear at
ZD109 ~ 113?
YES
Is the cable properly
connected?
YES
Does the wave form appear at
Pin 10 (H-sync) and
9
Pin 4 (V-sync) of IC 102?
10
YES
Does the wave form appear at
Pin 6 (H-sync) and
9
Pin 8 (V-sync) of IC103?
10
YES
Does the TX** signal appear
at Pin 14 and 15
of CN403?
YES
Check the cable between the
main board and panel and
replace the LCD panel.
Check power board.
NO
*Refer to 1.no power
(previous page)
NO
Check LED on
after pushing the power button.
NO
IC104 defect change main board.
NO
IC104 defect change main board.
NO
IC105 defect change main board.
4 Troubleshooting
4-7

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