Sony BRC-300 Service Manual page 116
3ccd color video camera / optical multiplex unit
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Also See for BRC-300:
- Command list (23 pages) ,
- Specifications (8 pages) ,
- Brochure & specs (8 pages)
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a-4.
The PAN/TILT motors do not rotate.
The PAN motor does not rotate.
Check the PAN
mechanical unit to identify
the defective part.
SY board failure
(IC1019 or the peripheral
circuit)
Replace the defective
parts or the SY board.
SY board failure
(IC1002 or the peripheral
circuit)
Replace the defective
parts or the SY board.
SY board failure
(IC1019 or the peripheral
circuit)
Replace the defective
parts or the SY board.
SY board failure
(IC1003 or the peripheral
circuit)
Replace the defective
parts or the SY board.
One of the following is defective.
. PAN motor wiring
. PAN motor
. SY board IC1001 or the peripheral circuit
Check above in order from the top to identify the defective part.
4-6
Does the PAN motor
No
rotate when its axis
is turned during
power OFF ?
Yes
Are CL1018/CL1023
No
waveforms on the
SY board +3.3 V clock
or "H" (+3.3 V) in the
rotation direction ?
Yes
Does +3.3 V exist
No
in CL1019, CL1020
on the SY board ?
Yes
Are the CL1009/
No
CL1012 levels set
to "H" (+5 V) on
the SY board ?
Yes
Does the CL1021
No
level turn to "H" (+3.3 V)
on the SY board at
PAN/TILT reset ?
Yes
No
Is the CL1022 level
set to "H" (+3.3 V)
on the SY board ?
Yes
Are the CL1010/
No
CL1011/CL1017 levels
set to "H" (+5 V)
on the SY board ?
Yes
a-4
FFC: Flexible flat cable
The TILT motor does not rotate.
Check the symptom.
Does the TILT
motor rotate when its
axis is turned during
power OFF ?
Are waveforms of
IC2501 pins 1, 2 and
IC2502 pins 9, 10 on the
DR board +3.3 V clock
or "H" (+3.3 V) in the
rotation direction ?
Does +3.3 V exist
in pins 1, 2, 4, 5
of IC2502 on the
DR board ?
Are the pins 3, 6, 8
levels of IC2502 set
to "H" (+5 V) on
the DR board ?
Do the pins 9, 10
levels of IC2501 turn
to "H" (+3.3 V) on the
DR board at PAN/TILT
Are the pins 4, 5
levels of IC2501 set
to "H" (+3.3 V) on
the DR board ?
Are the pins 3, 6, 8
levels of IC2501 set
to "H" (+5 V) on
the DR board ?
One of the following is defective.
. TILT motor wiring
. TILT motor
. DR board IC2503 or the peripheral circuit
. Check above in order from the top to identify the defective part.
No
Check the TILT
mechanical unit to identify
the defective part.
Yes
No
One of the following is
defective.
. FFC between SY board
and DR board
. SY board IC1019 or the
Yes
peripheral circuit
Check above in order from
No
he top to identify the
defective part.
Yes
DR board failure
No
(IC2502 or the peripheral
circuit)
Replace the defective
parts or the DR board.
Yes
No
One of the following is
defective.
. FFC between SY board
reset ?
and DR board
Yes
. SY board IC1019 or the
peripheral circuit
Check above in order from
No
the top to identify the
defective part.
Yes
DR board failure
No
(IC2501 or the peripheral
circuit)
Replace the defective
parts or the DR board.
Yes
BRC-300/300P
BRU-300/300P
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