4-35
BRC-300/300P
BRU-300/300P
Does D001 on the
DV board light ?
Are signals output
from R084 to R094
on the DV board ?
Yes
Does 27 MHz clock
exist in pin 4 of IC003
on the DV board ?
No
Yes
No
DV board failure
(IC007, IC008, or the
peripheral circuit)
Replace the defective parts
or this unit.
Yes
Does 27 MHz
clock exist in CL010,
and 13.5 MHz clock
in CL8057 on the
DV board ?
Yes
No
No
Are signals output
from pins 130 to 133,
135 to 138, 140, 141
of IC401 on the
DV board ?
No
DV board failure
(IC401 or the peripheral
circuit)
Replace the defective parts
or this unit.
Are signals output
from R404 to R413
on the DV board ?
Yes
DV board failure
(Pattern disconnection
between R228 to R237 or
R084 to R094, and IC401)
Replace the defective parts
or this unit.
No
7
Yes
DV board failure
(IC007, IC008, or the
peripheral circuit)
Replace the defective parts
or this unit.
No
Yes
DV board failure
(IC006 or the peripheral
circuit)
Replace the defective parts
or this unit.
DV board failure
(IC003 or the peripheral
circuit)
Replace the defective parts
or this unit.
DV board failure
(Pattern disconnection of
27 or 13.5 MHz clock)
Check the pattern and
replace this unit.
Go to
8
(Next page)
Does
+
1.5 V exist in
pin 2 of IC006 on the
DV board ?
