LG 28LN45 Series Service Manual page 17

4. No Video - Component
Check input signal format
Is it supported?
Y
Check Component Cable
Y
Check JK2800
Y
Check signal
R237,R239,R241
C218,C220,C222
Y
IC101 has problem
5. No Video - RGB
Check input signal format
Is it supported?
Y
Check RGB Cable
Y
Check JK400
Y
Check Hsync, Vsync
R266, R267
Y
Check signal RGB
R228,R230,R232
C204,C206,C208
Y
IC101 has problem
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Only for training and service purposes
Wave f orm of Comp Y
N
Replace JK2800 or
Check Device
N
Replace R237,R239,R241
C218,C220,C222
Wave f orm of C218
N
Replace JK400 or
Check Device
N
Replace R266, R267
N
Replace R228,R230,R232
C204,C206,C208
Wave f orm of R228/C204
Wave f orm of Comp Pb
Wave f orm of C220
Wave f orm of R4025(Vsync)
Wave f orm of R230/C206
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Wave f orm of Comp Pr
Wave f orm of C222
Wave f orm of R4024(Hsync)
Wave f orm of R232/C208
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