Sony BRC-300 Service Manual page 124

a-11. BRBK-303 does not function.
a-11
Is the CCFC-M100
connected properly ?
Yes
Is the connector of
CCFC-M100 clean ?
Yes
Is the BRU-300 main
power ON ?
Yes
Is AC power supplied
to the unit with an AC
adapter connected ?
Yes
Does +12 V exist in
pins 6 to 10 of CN2905
on the CN board ?
Yes
Are image data and
sync signals output
normally from CN2902
and CN2903 on the
CN board ?
Yes
BRBK-303 failure
Go to g-1
4-14
FFC: Flexible flat cable
No
Properly connect the
CCFC-M100.
No
Remove the dirt or dust.
No
Turn ON the BRU-300
main power.
No
Connect an AC adapter
to the unit to supply AC
power.
One of the following is
defective.
. FFC between SY board
No
and CN board
. Q1505 or the peripheral
circuit on the SY board
Check above in order from
the top to identify the
defective part.
No
Check the FFC between
the SY board and CN
board.
BRC-300/300P
BRU-300/300P