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DX-6630
Q104
CXA1082BQ (Servo Signal Processor)
_ IC BLOCK DIAGRAM AND DESCRIPTIONS
—
Q102
{
CXA1081M (RF Amp)
wv
$s
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12 U DATA REGISTER
INPUT SHIFT REGISTER
AODORESS- OECOOER
MIAROR
HOLO
AMP
SEQUENCER
OUTPUT
DECODER
OIFFERE~
NTTAL
AMP
TGI2
0 TM IA7
PS IA
'
z
g
ie
¥
2
@
TRACKING
ERROR
BOTTOM
HOLO
AMP
REF
ERENCE
CURRENT
}
RF 1-V
AMP
(1)
2)
N
&
Fig. 26
Rei | Input termina of output danaleC RF stmming | 4g | ccy_| Defect botiom hold output txmint |
:
[ne
| eemibatot RF mening amples = |g
frag Non-inversion bias terminal of focus error amplifier
P/N
:
Function
Insert the capacitor between this terminal and
2
FGD
| pin 3 when drop the high frequency gain of
focus servo
21
22
3
FS3
Switching terminal of high frequency gain of
23
focus servo
24
|
25
4 | FLB
ck
Input terminal of phase comparator output PDO
Input terminals for microcomputer and
interface
Time constant switching terminal when raise
the low frequency gain of focus servo
Flow the current to decide the focus search, track
CMR adjustment of focus error amplifier
9
Seer
cn
$$
| 3
| FEO
jump, and kick height
witching terminal of
P-
N-SUB of LD
:
~~
\
Operation amplifier output terminals for
power
(laser diode)
9
| Fe Output terminal of focus error amplifier
Titer drive
30
vcop | VCO free run frequency is proportion to resistor
:
:
value between pins 30 and 31
-
i
6
;
FE-
Inversion input terminal of focus amplifier
32.
| C864
| VCO (8.64MHz) output terminal
Input terminal of APC PD (Pin diode) amplifier
DEFECT!
Output terminal of defect comparator
|
Time constant terminal for high frequency gain
|
LPF time constant terminal of CLV servo error
;
TG2
| switching of tracking
36
|
Fow
signal
Inversion input terminal of spindle drive
amplifier
Connection terminal of capacitor for mirror
PD?
Inversion input, terminal of RF [-V amplifier (2)
23
hold Non-inversion input of mirror comparator
;
Connect to B+D of PIN diodes.
Connection terminal of capacitor for defect
bottom hold
DGND | Connect to GND
Auto asymmetry control input terminal
.
Connect to GND.
12
TA-
Inversion input terminal of tracking amplifier
38
SPDL—
Inversion input terminal of F I-V amplifier
Connect to F of PIN diode.
Non-inversion input terminal of sled amplifier
Inversion input terminal of sled amplifier
iS | SL-
Inversion input terminal of E I-V amplifier
Input terminals for microcomputer and interface
Connect to E of PIN diode.
16
SSTOP
Limit switch ON/OFF detector signal terminal
Output terminal of EFM comparator
| Feedback input terminal of E I-V amplifier
13
El
Gain adjustment of E I-V amplifier
Output terminal of FOK comparator
15
cc?
Input terminal from defect bottom hold output
:
signal via the coupling capacitor
Positive power supply
—17—
Tracking error signal input terminal
17.
|
ESET
Terminal of peak of phase compensation of focus
tracking and of setting of LPF
| 46 | TZc
Tracking zero cross comparator input terminal
18
| SENS
| Output terminals for microcomputer and
47
ATSC
Window comparator input terminal for ATSC
20
C.OQUT | interface
detection
|
27
|
BW
Time constant terminal of loop filter
Focus error signal input terminal
aes
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