LG MU-42PM12X Service Manual - Page 22

Is normal the, CXA2101?, M52758?, Are the Input voltage, IIC, Comm. and HV sync good?, Replace IC,

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TROUBLE SHOOTING GUIDE (6) Abnormal display in RGB DTV mode Is normal the No Are the Input voltage, IIC No CXA2101? Comm. and HV sync good? Yes Is normal the No Are the Input voltage, IIC No M52758? Comm. and HV sync good? Yes No Is normal the Scaler? Are the Input voltage, IIC Comm. and HV sync good? No Replace IC Replace IC Replace IC (7) Abnormal display in RGB PC mode Is normal the No Are the Input voltage, IIC No M52758? Comm. and HV sync good? Yes No Is normal the Scaler? Are the Input voltage, IIC Comm. and HV sync good? No Replace IC Replace IC (8) Abnormal display in DVI mode No Are the Input voltage, IIC No Is normal the Scaler? Comm. and HV sync good? Replace IC - 22 -

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TROUBLE SHOOTING GUIDE
(6) Abnormal display in RGB DTV mode
(7) Abnormal display in RGB PC mode
(8) Abnormal display in DVI mode
Is normal the
CXA2101?
Yes
Is normal the
M52758?
Are the Input voltage, IIC
Comm. and HV sync good?
No
Replace IC
No
Are the Input voltage, IIC
Comm. and HV sync good?
No
Replace IC
No
Is normal the
M52758?
Yes
Is normal the Scaler?
Are the Input voltage, IIC
Comm. and HV sync good?
No
Replace IC
No
Is normal the Scaler?
Are the Input voltage, IIC
Comm. and HV sync good?
No
Replace IC
No
Are the Input voltage, IIC
Comm. and HV sync good?
No
Replace IC
No
Yes
Is normal the Scaler?
Are the Input voltage, IIC
Comm. and HV sync good?
No
Replace IC
No