JVC XV-N50BK Service Manual page 29

4.5 BA6664FM-X (IC251) : Spindle motor driver
• Pin layout
1
NC
2
A3
3
NC
4
A2
5
NC
6
NC
7
A1
29
8
GND
H1+ 9
10
H1-
11
H2+
H2- 12
H3+ 13
H3- 14
• Block diagram
28 RNF
27 VM
26 GSW
25 Vcc
24 FG
23 PS
22 EC
30
21 ECR
FR
20
19 FG2
18 SB
17 CNF
BR
16
15 VH-
DRIVER
A3
2
GAIN
A2
CONTROL
4
A1
TL
7
HALL AMP
GND
+
8
-
H1+
9 +
-
H1-
10
+
-
H2+
11 +
-
H2-
12
+
-
H3+
13
+
-
H3-
14
TSD
GAIN
SWITCH
VCC
CURRENT
+ -
SENSE AMP
PS
TOROUE
SENSE AMP
+
-
VCC
VCC
R
D Q
SHORT BRAKE
CK Q
BRAKE MODE
Hall Bias
XV-N50BK,XV-N55SL
R
NF
28
VM
27
GSW
26
VCC
25
FG
24
PS
23
EC
22
ECR
21
FR
20
FG2
19
SB
18
CNF
17
BR
16
VH
15
(No.A0041)1-29