Sony MDS-JA20ES Service Manual page 63

– DIGITAL Board –
IC300 SN74HC153ANS
DATA INPUTS
STROBE A
VCC 2G SELECT 2C3 2C2 2C1 2C0
16 15 14 13 12 11
2C3 2C2 2C1 2C0
2G
B B A
B B A
1G
1C3 1C2 1C1 1C0
2 4 5
1 3 6
STROBE B 1C3 1C2 1C1 1C0
1G SELECT
DATA INPUTS
OUTPUT
2Y
9
10
2Y
A
A
1Y
7 8
OUTPUT GND
1Y
– POWER Board –
IC400 LB1641
T.S.D
MOTOR
DRIVE
1 2 3 4
IC700 LA5632
PH5
1
STBY 2
V 3
CC
ANA5
4
SYS3.3 5
6
B.BAK
AC
7
CD1
8
P. DOWN 9
GND 10
CD2 11
S. RESET 12
IC701 M5293L
GND
2
REFERENCE
ON/OFF 4
VOLTAGE
OVERHEAT
PROTECTION
IN 1
– 77 –
FWD/REV/STOP
CONTROL LOGIC
5 6 7 8
+
–
+
–
–
+
+
–
3.3V
–
DELAY
CIRCUIT
+
–
DELAY
+
CIRCUIT
VREF
5k
5
27k
+
3
–
OVERCURRENT
LIMITTER
O.C.P
MOTOR
DRIVE
9 10
REFERENCE
VOLTAGE
OUT