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7-9.
IC PIN FUNCTION DESCRIPTION
•
BD BOARD IC101 LA9241M (RF AMPLIFIER, FOCUS/TRACKING/SLED SERVO)
Pin No.
Pin Name
I/O
Function
1
FIN2
I
Signal input (B+D) from the optical pick-up detector
Added with FIN1 to create RF signal, subtracted with FIN1 to create focus error signal
2
FIN1
I
Signal input (A+C) from the optical pick-up detector
3
E
I
Signal input (E) from the optical pick-up detector
Subtracted with F to create tracking error signal
4
F
I
Signal input (F) from the optical pick-up detector
5
TB
I
Tracking error signal input for the tracking balance adjustment
6
TE–
I
Tracking error signal (invert signal) input terminal
7
TE
O
Tracking error signal output terminal
8
TESI
I
TES (Track Error Sense) comparator input terminal
Tracking error signal is band-passed and input
9
SCI
I
Shock detection input terminal
10
TH
I
Time constant setting terminal for the tracking gain adjustment
11
TA
O
TA amplifier output terminal
12
TD–
I
Creates a tracking phase compensation constant between TD (pin
!£
) and VR (pin
%•
) pins
13
TD
O
Setting terminal for the tracking phase compensation
14
JP
I
Setting terminal for the tracking jump signal (kick pulse) amplitude
15
TO
O
Tracking coil (2-axis device) drive signal output to the LA6541 (IC103), and sled motor drive
signal output terminal
16
FD
O
Focus coil (2-axis device) drive signal output to the LA6541 (IC103)
17
FD–
I
Creates a focusing phase compensation constant between FD (pin
!§
) and FA (pin
!•
) pins
18
FA
O
Creates a focusing phase compensation constant between FD– (pin
!¶
) and FA– (pin
!ª
) pins
19
FA–
I
Creates a focusing phase compensation constant between FA (pin
!•
) and FE (pin
@º
) pins
20
FE
O
Focus error signal output terminal
21
FE–
I
Focus error signal (invert signal) input terminal
22
AGND
—
Ground terminal (analog system)
23
SP
O
Single end output of the CV+ (pin
$º
) and CV– (pin
#ª
) pins signal
24
SPI
I
Spindle amplifier input terminal (invert input)
25
SPG
I
Gain setting resistor is connected when the spindle 12 cm mode
26
SP–
I
Works together with the SPD (pin
@¶
) to connect to the spindle phase compensation constant
27
SPD
O
Spindle motor (M101) drive signal output to the LA6541 (IC103)
28
SLEQ
I
Sled phase compensation constant is connected
29
SLD
O
Sled motor (M102) drive signal output to the LA6541 (IC103)
30
SL–
I
Sled feeding signal input from the system controller (IC801)
31
SL+
I
Sled feeding signal input from the system controller (IC801)
32
JP–
I
Tracking jump control signal input from the DSP (IC102)
33
JP+
I
Tracking jump control signal input from the DSP (IC102)
34
TGL
I
Tracking gain control signal input from the DSP (IC102) Gain becomes low when TGL is “H”
35
TOFF
I
Tracking off control signal input from the DSP (IC102)
Tracking becomes off when TOFF is “H”
36
TES
O
Tracking error signal output to the DSP (IC102)
37
HFL
O
Tracking detection signal output to the DSP (IC102) HFL (High Frequency Level) is used to
determine whether the main beam is positioned on a pit or a mirror
38
SLOF
I
Sled servo off control signal input from the DSP (IC102) Rough servo/phase control automatic
switching monitor input “H”: rough servo, “L”: phase servo
39
CV–
I
CLV error signal input from the DSP (IC102)
