CD-E770
•CXA-1082 <Focus & Tracking Servo>
<CXA-1082>
•LB1641 <Motor Driver>
OUTl Vtc2 0UT2
9 Q <?
10
•Function <CXA-1082>
Pin No.
Pin Name 1/0
Description
8
FGD
1
A capacitor is connected between this
Pin and F3 ( Pin 9) for decreasing high-
frequency gain of focus servo.
9
FS3
0
Terminal for switching high-frequency
gain of focus servo.
10
FLB
This Pin is used to connect a time cons-
tant for increasing low-frequency
characteristic of focus servo.
Pin No. Pin Name 1/0 Description
11
FEO 0
Terminal for outputting a signal for driv-
ing focus
coil.
17 TAO 0
Terminal for outputting a signal for driv-
ing tracking
coil.
20 SLD
0
Terminal for outputting a drive signal for
sled motor.
45 SPDLO 0
Terminal for outputting a drive signal for
spindle (disc) motor.
12
FE
O
1 Focus amplifier inverting input.
13
SRCH
1 This terminal is used to determine time
constant for genarating focus search
wavefoam.
14,
15
TGU
TG2
Terminals are used to determine a time
constant for switching tracking high-
frequency gain.
18
TA
G
1 Tracking amplifier inverting input.
19 SL & 1 Sled (Feed) amplifier non-inverting input.
21
SL
Q
1
Sled amplifier Inverting input.
22 SSTOP 1
Terminal for inputting a signal from limit
switch ON/OFF for detecting innermost
track of disc.
23
FSET
1 Terminal for setting focus and tracking
phase-compensation peaks and fo of
CLV LPF.
24 SENS 0 Terminal for outputting internal condi-
tion data.
26
C.OUT
0
Terminal for outputting a signal for
counting track number of disc.
27
DIRC
—
This terminal is used for one-track jump
operation.
28
XRST
—
Terminal for inputting a reset signal.
Reset operation in "L" level.
29
DATA
1 Serial data input from the CXP5034H
mechanism control.
30 XLT 1
Terminal for inputting a latch signal
for serial data from the CXP5034H
mechanism control.
31
CLK t Serial data clock input the CXP5034H
mechanism control.
32 DGND
—
Ground.
34 PDI 1 PDO signal input from the phase-
comparator of the CXD1125Q digital
signal processing.
35
ISET 0 Terminal for outputting a current to de-
termine focus search, track jump and
sleding kick height.
36
VCOF 1 VCO free-frequency is practically pro-
portional to resistance between this Pin
and Pin 37.
38 C864
0
Internal 8.64 MHz VCO output.
40
MDP 1 A spindle motor driving signal input from
the CXD1125 digital signal processing
(MDP terminal).
41 MON
1 A spindle motor ON/OFF signal input
from the CXD1125 digital signal pro-
cessing (MON terminal).
42 FSW This terminal is used to determine a time
constant for LPF of CLV servo error
signal.
44
SPDL 0
1
Spindle drive amplifier inverting input.
46
WDCK
1 Auto sequence clock input.
Typical frequency = 88.2 kHz.
47 FOK 1
FOK signal input from the CXA1081S.
48
MIRR 1 Mirror comparator signal input from the
CXA1081S.
2 DFCT
1
Defect comparator signal input from the
CXA1081S.
3
TE 1 Tracking error amplifier signal input from
CXA1081S.
4
TZC 1
Tracking zero cross comparator signal
Input.
5 ATSC 1 Window compartor input for ATSC de-
tection.
6 FE
1
Focus error amplifier signal input.
3
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