Sony BRC-300 Service Manual page 121

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