Daewoo DV6T712D Service Manual page 7

TROUBLESHOOTING
2. SYSTEM CIRCUIT
A. LED DISPLAY
No LED display.
NO
Is 5V obtained at IC701
Check R705, L601.
pin #9, 25?
YES
NO
Oscillation at IC701 pin #1? Exchange IC701.
YES
Specific GRID/SEG doesn't
function.
YES
NO
GRID output at PORT of
Check IC 701 pin #22~24, 27,
IC701?
28, 30, 31.
YES
NO
SEG output at PORT of IC701?
Check IC 701 pin #10~12, 14~21.
Exchange IC601.
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