Dell GCR-8481B Service Manual page 16

• IC201 (M63026FP) : Drive IC (Spindle/Servo Actuator)
Rotates the Spindle Motor by receiving MDP signal from IC501.
Generates the signal to drive Focus Actuator Coil, Tracking Actuator Coil, Sled Motor, and Stepping
Motor by Control Signal input from DSP and u-COM.
Block Diagram
023/026 FG x1
024/027 FG x3
FG
FG
HU+
HU-
HV+
HV-
HW+
HW-
Hall Bias
CTL
amp
SPIN
REF
SL1IN
SL2IN
FOIN
TOIN
Pin Description
Pin No. Symbol
1 SL1IN Slide control voltage input 1
2 SL2IN Slide control voltage input 2
3 VM2 Motor Power Supply 2 (for Slide)
4 RSL2 Slide current sense 2
5 SL2+ Slide non-inverted output 2
6 SL2- Slide inverted output 2
7 GND GND
8 RSL1 Slide current sense 1
9 SL1+ Slide non-inverted output 1
10 SL1- Slide inverted output 1
11 GND GND
12 W Motor drive output W
13 V Motor drive output V
14 U Motor drive output U
15 RSP Spindle current sensie
16 HW- HW- sensor amp. input
17 HW+ HW+ sensor amp. input
18 HV- HV- sensor amp. input
19 HV+ HV+ sensor amp. input
20 HU- HU- sensor amp. input
21 HU+ HU+ sensor amp. input
14
S S
Reverse
Detect
120˚
MATRIX
Current
amp
comp
Direction
comp
023/024
X5
026/027
X12
Description
S
Logic
CTL Current
comp
Direction
comp
Regulator
Reg
023/024
X5
026/027
X12
Pin No. Symbol
22
23
24
25
26 SPIN
27 FOIN
28 TOIN
29
30
31
32 5VCC
33
34
35
36
37
38
39
40 LOIN+
41
42
S
Logic
Current
CTL
TSD
amp comp
BIAS
Direction
Brake select
comp
Frequency
generator
VM1
5V power supply
X8
Description
VM1 Motor Power Supply 1 (for Spindle)
HB Bias for Hall Sensor
FG Frequency generator output
REF Refernce voltage input
Spindle control voltage input
Focus control voltage input
Tracking control voltage input
GND GND
TO- Tracking inverted output
TO+ Tracking non-inverted output
5V Power Supply (for FS, TS)
GND GND
FO+ Focus non-inverted output
FO- Focus inverted output
LO+ Loading non-inverted output
LO- Loading inverted output
MU2 Mute/break select terminal 2
VM3 Power supply 3(for Loading)
Loading control input( + )
MU1 Mute/break select terminal 1
OSC PWM carrier oscilation set
MU1
MU2
OSC
5Vcc
LOIN+
VM3
LO-
LO+