Troubles When Connecting Optional Cards - Sony BRC-300 Service Manual

4-2-4. Troubles when Connecting Optional Cards

a-10. No image is output from BRBK-301/302/304.
BRBK-301 failure
Go to e-1
BRBK-302 failure
Go to f-1
BRBK-304 failure
Go to h-1
BRC-300/300P
BRU-300/300P
a-10
No
Is the problem
rectified by replacing
BRBK-301/302/304 ?
Yes
Does +12 V exist in
pins 6 to 10 of CN2905
on the CN board ?
Are image data and
sync signals output
normally from CN2902
and CN2903 on the
CN board ?
BRBK-301 failure
BRBK-302 failure
BRBK-304 failure
FFC: Flexible flat cable
No
Yes
No
Yes
Go to e-1
Go to f-1
Go to h-1
One of the following is
defective.
. FFC between SY board
and CN board
. Q1505 or the peripheral
circuit on the SY board
Check above in order from
the top to identify the
defective part.
Check the FFC between the
SY board and CN board.
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