Onkyo DV-S555 Service Manual page 57

IC BLOCK DIAGRAM/ TERMINAL DESCRIPTION
BA6664FM (Spindle Motor Driver : IC251)
Block diagram
A
3
2
A
2
4
A
1
7
GND
8
H
1
9
H
1
10
H
2
11
H
2
12
H
3
13
H
3
14
Pin No. Pin name
1 N.C.
2 A
3
3 N.C.
4 A
2
5 N.C.
6 N.C.
7 A
1
8 GND
9 H
1
10 H
1
11 H
2
12 H
2
13 H
3
14 H
3
15 V
H
NC
1,3,5,6
Driver
TSD
Gain
control
Current
sense amp
T
L
HALL AMP
R
D
Q
CK
Q
Function Pin No.
N.C. 16
Output pin 17
N.C. 18
Output pin 19
N.C. 20
N.C. 21
Output pin 22
Ground
23
Hall signal input pin 24
Hall signal input pin 25
Hall signal input pin 26
Hall signal input pin 27
Hall signal input pin 28
Hall signal input pin
Hall bias pin FIN
R
NF
28
VM
27
Gain
GSW
switch
26
Vcc
Vcc
25
FG
24
PS
PS
23
Torque
EC
22
E
CR
Vcc
21
Vcc
FR
20
FG2
19
SB
Short brake
18
C
NF
17
BR
Brake mode 16
V
H
15
HALL BIAS
FIN
Pin name Function
Select the brake mode pin
BR
Connect a capacitor for negative feedback
C
NF
Short brake pin
SB
FG3 signal output pin
FG2
Terminal which detects rotation
FR
Reference control pin of output voltage
E
CR
Output control pin
E
C
Power save pin
PS
FG signal output pin
FG
Power supply pin
V
CC
Gain select pin
GSW
Power supply pin (motor)
V
M
Resistance connection pin
R
NF
for output current detection
Ground pin
FIN
DV-S555