TROUBLE SHOOTING
44
2. CONTROL BOARD CIRCUIT
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
YES
N O
NO LED display
Is 5V obtained at
Pin#7,21 of U1
Check pin#1 of J1
Oscillation at
pin#1 of U1
Check R2, exchange U1
Is there KEY/SEG
signal?
Cheack PCB
KEY output at
PORT of U1
Check U1 pin #6~7
Check SEG/GRID output
at PORT of U1
Check U1 pin#8~27
Exchange U1
Sm(DAEWOO_DG-K511S)060115.indd 44
2006-1-16 15:31:49
Summary of Contents for DG-K511S
Page 28: ...PCB CIRCUIT BOARD 27 2 DECODE BOARD Sm DAEWOO_DG K511S 060115 indd 27 2006 1 16 15 31 31 ...
Page 29: ...PCB CIRCUIT BOARD 28 Sm DAEWOO_DG K511S 060115 indd 28 2006 1 16 15 31 35 ...
Page 36: ...PCB CIRCUIT BOARD 35 5 YUV OUTPUT BOARD Sm DAEWOO_DG K511S 060115 indd 35 2006 1 16 15 31 42 ...