4-31
BRC-300/300P
BRU-300/300P
5
Does
+
12 V exist
in CL8056 on the
SD board ?
Yes
No
Does D8001 on the
SD board light ?
Yes
No
When the BRC-300/P or
the BRU-300/P is normal,
replace this unit.
Does
+
3.3 V exist
in L8006, and
+
1.5 V
exist in pin 2 of IC8002
on the SD board ?
SD board failure
(IC8001, IC8002, Q8002,
Q8003, or the peripheral
circuit)
Replace the defective
parts or this unit.
No
Yes
Does
+
5.0 V exist
in L8008 on the
SD board ?
SD board failure
(IC8004, Q8004, Q8005,
or the peripheral circuit)
Replace the defective
parts or this unit.
No
Yes
Do the video
signals exist in CL8058
to CL8073 and the clock
exist in CL8074 and
CL8057 on the
SD board ?
Yes
No
Is the problem
resolved after the
adjustment
in Section 3-6 ?
Yes
No
When the BRC-300/P or
the BRU-300/P is
normal, replace this unit.
Do the video
signals exist in CL8085
to CL8094 on the
SD board ?
Yes
No
SD board failure
(IC8003 or the peripheral
circuit)
Replace the defective
parts or this unit.
Do the output
signals exist in pins 41,
43 of IC8006 on the
SD board ?
Yes
No
SD board failure
(IC8006 or the peripheral
circuit)
Replace the defective
parts or this unit.
Is the signal about
720
±
72 mV when the
output of SDI OUT is
measured by the
oscilloscope (50
Z
termination) ?
Yes
No
SD board failure
(Q8006, Q8007, or the
peripheral circuit)
Replace the defective
parts or this unit.
Replace D8001 on the
SD board, and check
again.
End
BNC cable failure, or
installation failure of this
unit.
Check the BNC cable
connected to this unit.