Sony BVU-950 - Page 23

Microcomputer Peripheral Circuit
CAPSTAN 4FG | cree | CAPSTAN
CAPSTAN FWO/ REV [ erez_] st SPEED
SPEED PG-A eres PG-A DELAY FOR SPEED SERVO
PHASE PG SWITCHING A,B OELAY
v2 CTC3 v2 SERVO CONTROL
ae
1/2 VO e| CTCO 4V0 DRUM PHASE
CAPSTAN PHASE
M2
8=-BIT
a
CAPSTAN
SEARCH
MICRO COMPUTER le———»| MICRO ova [) s—Torove
ON SY BOARO COMPUTER | | T-TOROQUE
S— ORIFT
| RAM | ROM [1 ORIFT
¢
REF FRAME PULSE ITMRO
PaV | | REF PHASE OET |
@<“ PHASE DET
iTMR!
SW PULSE _____] /ORUM PHASE DET)
CTL CAP PHASE DET
4
J
ITMR2
CAPSTAN FG | (car SPEED )
OET
é
g
INT
SW
lOEXO
PINCH
ON
CAPSTAN DIR” | :!70 EXPANDER(—~ ccnvo wOck
REEL DIR ; -
Y
1OEXI DORUM/ CAPSTAN/ REEL
1/0 EXPANDER! - SERVO CONTROL
é
z
SW PULSE lOEX2
SYNC
170
EXPANDER
Cm
REF
SYNC
SELECT
FRAMING
4-7