Sony BRC-300 Service Manual page 128

c-2. The power indicator blinks in red, and "communication error" appears on the monitor.
c-2
Are the laser unit
SAS-101A and the
CCFC-M100 correctly
connected ?
Yes
Is the connector of
CCFC-M100 clean ?
Yes
Is the AC adaptor
connected to the
BRC-300/P, and
supply AC power ?
Yes
Is pin 107 of
IC3518 set to "H" and
the collector of Q4401
set to "L" ?
Yes
Is the 54 MHz
clock input to pin 8
of IC4401 ?
Yes
Does +3.3 V exist
in pins 15, 16 of CN 4401
on the MC board ?
Yes
Is +2.5 V power
supplied to IC4401 on
the MC board ?
Yes
The laser unit SAS-101A
failure
Replace the SAS-101A.
4-18
No
Connect the laser unit SAS-101A
and CCFC-M100 securely.
No
Remove the dirt or dust.
No
Connect the AC adaptor to the
BRC-300/P, and supply AC
power.
MC board failure
No
(IC3518, Q4401, or the
peripheral circuit)
Replace the defective parts or
the MC board.
MC board failure
No
(X3001 or the peripheral circuit)
Replace the defective parts or
the MC board.
One of the following is defective.
. L4403 to L4405, or the
No
peripheral circuit
. +3.3 V line
Check above in order from the
top to identify the defective part.
One of the following is defective.
. L4406, or the peripheral circuit
No
. +2.5 V line
Check above in order from the
top to identify the defective part.
BRC-300/300P
BRU-300/300P