Panasonic VL-SV75 Series Service Manual page 29

9.2.3.2 Defect of the Power board unit
Defect of the Power board unit
Is the voltage of C1
(Power board) about
24V?
YES
Is the voltage of C3
(Power board) about
24V?
YES
Is the voltage of CL7
(Power board) about
12V?
YES
Go to Defect of the Main unit power supply
(see next page).
NO Replace fuse(F1)on Power Board
of the Main Monitor Station.
Check around LF1
NO
L1,L2,D1,D2,D3,D4
of Power Board.
Check around IC1
L3,R1,R2,R3,R4,R9,
NO
C7,C9,C10,C11,
C12,C14,
of Power Board.
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Is the unit powered
Replace the
Is the unit powered
fault parts.
Replace the
Is the unit powered
fault parts.
Replace the Power board unit.
YES
END
ON ?
NO
YES
END
ON ?
NO
YES
END
ON ?
NO
END