Sony BRC-300 Service Manual page 141

When the BRC-300/P or
the BRU-300/P is
normal, replace this unit.
SD board failure
(IC8003 or the peripheral
circuit)
Replace the defective
parts or this unit.
SD board failure
(IC8006 or the peripheral
circuit)
Replace the defective
parts or this unit.
SD board failure
(Q8006, Q8007, or the
peripheral circuit)
Replace the defective
parts or this unit.
BRC-300/300P
BRU-300/300P
No
Do the video
signals exist in CL8058
No
to CL8073 and the clock
exist in CL8074 and
CL8057 on the
SD board ?
Yes
Do the video
No
signals exist in CL8085
to CL8094 on the
SD board ?
Yes
Do the output
No
signals exist in pins 41,
43 of IC8006 on the
SD board ?
Yes
Is the signal about
720 ±72 mV when the
No
output of SDI OUT is
measured by the
oscilloscope (50 Z
termination) ?
Yes
BNC cable failure, or
installation failure of this
unit.
Check the BNC cable
connected to this unit.
5
No
Does D8001 on the
SD board light ?
Yes
Does +12 V exist
in CL8056 on the
SD board ?
Is the problem
resolved after the
adjustment
in Section 3-6 ?
Yes
Does +3.3 V exist
in L8006, and +1.5 V
exist in pin 2 of IC8002
on the SD board ?
Does +5.0 V exist
in L8008 on the
SD board ?
End
When the BRC-300/P or
No
the BRU-300/P is normal,
replace this unit.
Yes
SD board failure
(IC8001, IC8002, Q8002,
No
Q8003, or the peripheral
circuit)
Replace the defective
parts or this unit.
Yes
SD board failure
(IC8004, Q8004, Q8005,
No
or the peripheral circuit)
Replace the defective
parts or this unit.
Yes
Replace D8001 on the
SD board, and check
again.
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