LG LM-M530A, Service Manual

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POWER CIRCUIT
Check the Fuse
Check the DC output
of C901(+), C902(-)
Check the DC Output of
C930(+)
Check the Voltage
output of IC901, IC902
Check the DC 12V
Output of IC903
Check the 5V of CN513
pin 7(CD FUNCTION)
END
Replace the Fuse
Check the AC Output of
CN901 pin1, 5
Check the AC Output of
CN701 PIN 9, 10
Replace the IC904
Replace the D901, D902,
D903, D904
Replace the D706, D707,
D708, D709
Check the IC901, IC902
Check the 5V of
IC301 pin78
Check the “Low” of Q904“B”
Check the Q904, CD Ass’y
Check the power Ass’y or
Replace the Transformer
Check the power Ass’y
or Replace the
Transformer
Check the 5V of IC301
PIN13& PN302,
CN302, PIN13
Check the HIGH of
Q905 “B” and Replace
Check the “High” of
IC501 pin 14
Check the IC501
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO