37
Power unit operation check for E60-C3
YES
Power cord and harness in the unit
connected
Line filter unit? L1 ,L2,L3 or RT1,RT2 is
out of order?
YES
Are the power cord and harness in the
unit
NO
YES
YES
YES
If F1 normal?
Does DB1 output 155V when AC
input 110V?
NO
Change a new full-wave rectifier diode to
check the output voltage.
Is the voltage of +12V applied to pin
4,8,9,14 of CN201?
Does the standby circuit normal?. (Q1, T1,
D201 , D2 , Q201,Q202,Q204,Q205 & the
circuit around the U1 and protection circuit
ect. is checked)
YES
Does the U101 , Q103 ,T101,D105 and the
circuit around IC U101?or Q104,U102?
Check them.
NO
NO
NO
NO
Is VLED output 27V as for power on/off
switch when is on?
Does the U301,T301, Q301, Q302,
D303,D304 and the circuit around IC
U301?or Q104,U102? Check them.
Is PFC output 370V as for power on/off
switch when is on?