Rm-Br300; Trouble When Power-On The Unit - Sony BRC-300 Service Manual

4-5. RM-BR300

4-5-1. Trouble when Power-on the Unit

d-1. The LED does not light after power-on.
d-1
Is the mode switch
correctly set ?
Yes
Is the FFC between
the MD and SW boards
correctly connected ?
Yes
Is the fuse F5001 on the
MD board normal ?
Yes
Are the power supply
voltages of the MD board
(+5 V, +3.3 V) normal ?
Yes
Are the power supply
voltages of the SW board
(+5 V, +3.3 V) normal ?
Yes
Is the LED control
signal output from IC5004
on the MD board ?
Yes
SW board failure
(Each LED or the
peripheral circuit)
Replace the defective
parts or the SW board.
BRC-300/300P
BRU-300/300P
FFC: Flexible flat cable
No Set correctly the mode
switch according to the
camera.
No
Connect correctly the FFC
between the MD and SW
boards.
No
Replace the fuse F5001
on the MD board.
MD board failure
No
(IC5002, IC5003, or the
peripheral circuit)
Replace the defective
parts or the MD board.
SW board failure
No
(+5 V or +3.3 V line, or the
peripheral circuit)
Replace the defective
parts or the SW board.
MD board failure
No
(IC5004 or the peripheral
circuit)
Replace the defective
parts or the MD board.
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