Sony BRC-300 Service Manual page 135

MD or SW board failure
(+5 V or +3.3 V line, or the
peripheral circuit)
Replace the defective
parts, or the MD or SW
board.
SW board failure
(Each switch or the
peripheral circuit)
Replace the defective
parts or the SW board.
BRC-300/300P
BRU-300/300P
3
Are the pan/tilt/zoom
operations available ?
Yes
Are the +5 V and
No
+3.3 V lines on the
MD/SW boards
normal ?
Yes
Is the signal input to
No
IC5004 on the MD board
after the button is
pressed ?
Yes
MD board failure
(IC5004 or the peripheral
circuit)
Replace the defective
parts or the MD board.
No
Is the +5 V and
+3.3 V lines on the
MD board normal ?
Yes
Are the CH and
ENTER signals input
to IC5004 on the
MD board ?
Yes
MD board failure
(+5 V or +3.3 V line, or
No
the peripheral circuit)
Replace the defective
parts or the MD board.
One of the following is
defective.
. Joystick
No
. IC5001 or the peripheral
circuit on the MD board.
Replace above parts in
order from the top to
identify the defective part.
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