4-11
BRC-300/300P
BRU-300/300P
Check the sync setting
of the unit.
No
Yes
CC board failure
(IC011 to IC013, X001, or
the peripheral circuit)
Replace the defective
parts or the CC board.
External sync
Internal sync
No
Are sync
signals suited for the
system (NTSC/PAL)
input ?
Yes
Input sync signals suited
for the system
(NTSC/PAL).
Remove the EXT SYNC
IN connector noise or
check functions with the
EXT SYNC IN connector
open.
When no problem is found,
check the input system.
No
Yes
No
Is the pin 11 level of
IC014 set to “L” (INT)
on the CC board ?
Is the pin 11 level of
IC014 set to “H” (EXT)
on the CC board ?
Yes
CC board failure
(IC009, IC010, or the
peripheral circuit)
Replace the defective
parts or the CC board.
CC board failure
(IC009, IC010, or the
peripheral circuit)
Replace the defective
parts or the CC board.
a-8
Is the EXT SYNC
IN connector normal ?
(No noise)
a-8.
External sync does not function.
Video output becomes out of synchronization.
