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Panasonic Manuals
Intercom System
VL-SV74BX
Service manual
Panasonic VL-SV74BX Service Manual page 30
Video intercom system
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Contents
Table of Contents
Troubleshooting
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Is the voltage of
CL930(Main Board) about
4V?(12V→4V)
YES
Is the voltage of
CL920(Main Board) about
3.3V?(12V→3.3V)
YES
Is the voltage of
CL418(Main Board) about
4V?
YES
Is the voltage of
CL950(Main Board) about
3.3V?(5V→3.3V)
YES
Is the voltage
of CL437(Main Board)
about 1.8Vfor BBIC Core?
(4V→1.8V)
YES
Is the voltage
of CL438(Main Board)
about 3.3V for BBIC I/O?
(4V→3.3V)
YES
(To next page)
Check around IC930,
L930,R931,R932,R933,
NO
C930,C932,C933,C934,
C935 and C937
of Main Board.
Check around IC920,
L920,R921,R922,R923,
NO
C920,C922,C923,C924,
C925 and C927
of Main Board.
Check around R940 and
NO
R941 of Main Board.
Check around IC950,
NO
C951 and C952
of Main Board.
Check around Q401,
NO
R419,C427,C435 and
C438 of Main Board.
Check around Q402,
NO
R416,R417,R420,
C418,C433 and C436
of Main Board.
Replace the
Is the unit powered
fault parts.
Replace the
Is the unit powered
fault parts.
Replace the
Is the unit powered
fault parts.
Replace the
Is the unit powered
fault parts.
Replace the
Is the unit powered
fault parts.
Replace the
Is the unit powered
fault parts.
- 30 -
YES
END
ON ?
NO
YES
END
ON ?
NO
YES
END
ON ?
NO
YES
END
ON ?
NO
YES
END
ON ?
NO
YES
END
ON ?
NO
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This manual is also suitable for:
Vl-sv74cx
Vl-sv74az
Vl-sv74ml
Vl-sv74sx
Vl-sv74vn
Vl-sv74vnp
...
Show all
Vl-mv74bx
Vl-mv74cx
Vl-mv74az
Vl-mv74ml
Vl-mv74sx
Vl-mv74vn
Vl-mv74vnp
Vl-v524lce
Vl-v524lsx
Vl-v524lvn
Vl-mb524bx
Vl-mb524sx
Vl-mb524vn
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