36
Power unit operation check
YES
Power cord and harness in the unit
connected
Line filter unit? LX103 ,LX104 or RT101
is out of order?
YES
Are the power cord and harness in the
unit
NO
YES
YES
YES
If F102 normal?
Does BD101 output 169V when AC
input 120V?
NO
Change a new full-wave rectifier diode to
check the output voltage.
Is the voltage of +12V applied to pin
11,12 ,13 of CN201?
Does the standby circuit normal?. (QM104,
TM101, ZD102 , DM103 , the circuit around
the um102 and protection circuit ect. is
checked)
Is +5V output as for power on/off switch
when is on?
YES
Is +24V output as for power on/off
switch when is on?
Does the UM103 , UM108 ,LM101 and the
circuit around IC UM103/UM108? Check
them.
Does the UL101 , QL101 ,QL102 and the
circuit around IC UL101? Check them.
NO
NO
NO
NO
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