Sony BRC-300, Руководство по обслуживанию

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4-6
BRC-300/300P
BRU-300/300P
Check the symptom.
The TILT motor does not rotate. The PAN motor does not rotate.
No
Does the PAN motor
rotate when its axis
is turned during
power OFF ?
Yes
Check the PAN
mechanical unit to identify
the defective part. No
Does the TILT
motor rotate when its
axis is turned during
power OFF ?
Yes
Check the TILT
mechanical unit to identify
the defective part.
No
Are CL1018/CL1023
waveforms on the
SY board
+
3.3 V clock
or “H” (
+
3.3 V) in the
rotation direction ?
Yes
SY board failure
(IC1019 or the peripheral
circuit)
Replace the defective
parts or the SY board.
No Does
+
3.3 V exist
in CL1019, CL1020
on the SY board ?
Yes
No
Are the CL1009/
CL1012 levels set
to “H” (
+
5 V) on
the SY board ?
Yes
SY board failure
(IC1002 or the peripheral
circuit)
Replace the defective
parts or the SY board.
No
Does the CL1021
level turn to “H” (
+
3.3 V)
on the SY board at
PAN/TILT reset ?
Yes
SY board failure
(IC1019 or the peripheral
circuit)
Replace the defective
parts or the SY board.
No Is the CL1022 level
set to “H” (
+
3.3 V)
on the SY board ?
Yes
No
Are the CL1010/
CL1011/CL1017 levels
set to “H” (
+
5 V)
on the SY board ?
Yes
SY board failure
(IC1003 or the peripheral
circuit)
Replace the defective
parts or the SY board.
No
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 ?
Yes
One of the following is
defective.
.
FFC between SY board
and DR board
.
SY board IC1019 or the
peripheral circuit
Check above in order from
he top to identify the
defective part.
No
Does
+
3.3 V exist
in pins 1, 2, 4, 5
of IC2502 on the
DR board ?
Yes
No
Are the pins 3, 6, 8
levels of IC2502 set
to “H” (
+
5 V) on
the DR board ?
Yes
DR board failure
(IC2502 or the peripheral
circuit)
Replace the defective
parts or the DR board.
No
Do the pins 9, 10
levels of IC2501 turn
to “H” (
+
3.3 V) on the
DR board at PAN/TILT
reset ?
Yes
One of the following is
defective.
.
FFC between SY board
and DR board
.
SY board IC1019 or the
peripheral circuit
Check above in order from
the top to identify the
defective part.
No
Are the pins 4, 5
levels of IC2501 set
to “H” (
+
3.3 V) on
the DR board ?
Yes
No
Are the pins 3, 6, 8
levels of IC2501 set
to “H” (
+
5 V) on
the DR board ?
Yes
DR board failure
(IC2501 or the peripheral
circuit)
Replace the defective
parts or the DR 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.
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.
FFC: Flexible flat cable
a-4
a-4. The PAN/TILT motors do not rotate.