4-13
BRC-300/300P
BRU-300/300P
Does
+
12 V exist in
pins 6 to 10 of CN2905
on the CN board ?
No
Yes
No
Is the problem
rectified by replacing
BRBK-301/302/304 ?
Yes
FFC: Flexible flat cable
BRBK-301 failure
Go to e-1
BRBK-302 failure
Go to f-1
BRBK-304 failure
Go to h-1
Are image data and
sync signals output
normally from CN2902
and CN2903 on the
CN board ?
No
Yes
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.
a-10
BRBK-301 failure
Go to e-1
BRBK-302 failure
Go to f-1
BRBK-304 failure
Go to h-1
4-2-4. Troubles when Connecting Optional Cards
a-10. No image is output from BRBK-301/302/304.