55
LC-42SV50U/ LC-46SV50U
Power unit operation check
YES
Power cord and harness in the unit
connected
Line filter unit? LX101 ,LX102 or
RT101 is out of order?
YES
Are the power cord and harness in the
unit
NO
YES
YES
YES
If F101 and 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 +5V applied to pin
6,7 ,8 of CN204?
Does the standby circuit normal?.
(TS101DL106,DL107 , the circuit
around the US101 and protection
circuit ect. is checked)
Are 12V and +24V output as for
power on/off switch when is on?
Does the LLC circuit normal?
Check primary side(TL102,QL101,QL102)
And Second
side(DL109,DL110,DL106)And the
protection circuit.
NO
NO
NO
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