Sony Power HADFX HDC-P1, Maintenance Manual

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1-15 (E)
HDC-P1
MB-1158 Board
A B C
1
2
3
4
S1
MB-1158 BOARD (SIDE B)
Ref No. Name Description Factory setting
S1 Tx/Rx Serial communication Selection
Analog D/A output
I/O General-purpose I/O port
SW-1485 Board
A
1
2
3
4
B
S4
S3
SW-1485 BOARD (SIDE B)
Ref No. Name Description Factory setting
S3 Contact / TTL For green tally
Contact: Short-circuit of G TALLY (X) IN and G TALLY (Y) IN
TTL:
Set the G TALLY (X) IN pin to a TTL level voltage to the
G TALLY (Y) IN pin
Contact
S4 Contact / TTL For red tally
Contact: Short-circuit of R TALLY (X) IN and R TALLY (Y) IN
TTL:
Set the R TALLY (X) IN pin to a TTL level voltage to the
R TALLY (Y) IN pin
Contact