Panasonic VL-SV74BX, Service Manual

Page: 29 / 99

9.2.3.2 Defect of the Main board unit
Detect of the Main unit power supply
Replace the
fault parts.
Replace the
fault parts.
Is the voltage of
C903 about 22V?
Check around Q31,
D31,R32,R31 and
C34 of Main Board.
Is the voltage of C904
(Main Board) about
12V?
Replace fuse(F900) on Main Board of
the Main Monitor Station.
Is the voltage of C906
(Main Board) about
12V?
Replace Resistor(R902) on Main Board
of the Main Monitor Station.
Is the voltage
of CL910(Main Board) about
5V? (12V→5V)
Check around IC910,
L910,R912,R913,
C910,C912,C913,C914,
C915 and C917 of
Main Board.
YES
YES
YES
YES
(To next page)
NO
NO
NO
NO
Is the unit powered
ON ?
NO
YES
END
Is the unit powered
ON ?
NO
YES
END
Is the unit powered
ON ?
NO
YES
END
Is the unit powered
ON ?
NO
YES
END
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