Samsung AM14A1E07, Service Manual

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Samsung Electronics
5-3
Troubleshooting
5-2-2 When the power is not applied(Outdoor unit)
1) Checking points
(1) Is the voltage of the power normal?
(2) Is the power line in good contact?
(3) A re the primary (CN71) and secondary (CN11) connectors of the power trans in good
c o n t a c t ?
(4) Is the power voltage of the IC01 (KA7812) normal? (DC11 . 5 V ~ D C 1 2 . 5 V )
2 ) Trouble shooting pro c e d u re
N
Y
Y
N
Y
Y
Y
Y
Y
N
N
N
N
N
Y
Turn off the power, and then turn on the power
in five minutes.
Does the power of the IC01(KA7812) match with
the voltage of DC12V?
Is the F701(3.15A) fuse blown?
Is the secondary voltage of the trans normal?
(AC15V~AC25V)
Is the first voltage of the trans normal?
(AC198V~AC264V)
Is the rectifying diode(D101~D104) normal?
Is the IC01(KA7812) normal?
End
Normal operation
Replace the fuse
Replace the trans
Replace the trans
Check and replace
the rectifying diode
Replace the C102
and C104.
Replace the IC01
Is the voltage at both ends of the C102
electrolytic condenser in the range of DC16~DC25V?
Is the voltage at both ends of the C104 electrolytic
condenser DC12V?