Panasonic VL-SV74BX - Defect of the Main Monitor Station Power Supply

9.2.3 Defect of the Main Monitor Station Power Supply
9.2.3.1 Defect of the Power board unit
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
Is the voltage of
CL6 about 22V?
Rewire the AC cord correctly.
NONO
YES
YES
Are the AC cord and
the terminals connected to
CN1 properly.
START
Is the voltage of
CL6 about 22V?
Replace the Power board unit.
Replace the primary circuit parts
of the Power Supply circuit.
Check around D6,
R25 and C25 of
Power Board.
Replace the
fault parts.
NO
NO
NO
Is the voltage of 10
pin of T1 about 22V?
Is the voltage of
CL6 about 22V?
Is the voltage of
CL7 about 12V?
Is the voltage of
CL6 about 22V?
END
YES
END
END
END
END
Replace the fuse(F1).
Is the unit
powered ON?
YES Check around D8,
R10,IC3 and IC4 of
Power Board.
Replace the
fault parts.
NO
NO
END
Is the unit
powered ON?
Is the voltage
between both ends of VS1
ranging from 220V
to 240V?
Is the fuse(F1) is burned out?
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