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Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
IC-Innen-Beschaltungen / IC Block Diagrams
NJM2100M
–INPUT
2,6
+INPUT
3,5
S-81250HG-RD
V
2
3
OUT
IN
V
REF
GND
1
FIN2
1
FIN1
2
E
3
F
4
TB
5
TE–
6
TE
7
S-8054HN
TESI
8
VDD
2
SCH
9
1
OUT
TH
10
TA
11
TD–
12
VSS
7
TD
13
JP
14
TO
15
FD
16
2 - 11
MCD 36 / MCD 40
8
V+
1,7
OUTPUT
4
V–
64
63 62
61 60
59 58 57 56 55 54 53 - 50
49
APC
REF
RF DET
LA9240MS
VCA
I/V
∝-COM
BAL
VCA
INTERFACE
SLC
TE
RF
AMP
T.SERVO &
T.LOGIC
SPINDLE
SERVO
F.SERVO &
F.LOGIC
SLED SERVO
17 18 19 20 2122 23 24 25 26 27 28 29 30 31 32
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Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
LA 9240 MS
PIN
PORT NAME
1
FIN2
Pickup photo-diode connecting pin. Forms RF signal by addition to FIN1 pin,and FE signal by
subtraction.
2
FIN1
FIN1
Pickup photo-diode connecting pin.
3
E
Pickup photo-diode connecting pin. Forms TE signal by subtraction from F pin.
4
F
Pickup photo-diode connecting pin.
5
TB
Pin for inputting DC constituent of TE signal.
6
TE-
Pin for connecting gain setting resistence of TE signal to TE pin.
7
TE
TE signal output pin.
8
TESI
TES(TRACK ERROR SENCE) comparator input pin. Band pass TE signal, and input.
9
SCI
Input pin for shock detection.
10
TH
Constant setting pin at the time of tracking gain.
11
TA
Pin for connecting high pass elimination condensor of servo.
12
TD-
Pin for constituting tracking phase compensation constant between TD and VR pin.
13
TD
Pin for setting tracking phase compensation.
14
JP
Pin for setting tracking jump signal (kick pulse) amplitude.
15
TO
Tracking control signal output pin.
16
FD
Focusing control signal output pin.
17
FD-
Pin for constituting focussing phase compenstion constant between FD and FA pin.
18
FA
Pin for constituting focussing phase compensation constant between FA- and FE- pin.
19
FA-
Pin for constituting focussing phase compensation constant between FA and FE pin.
20
FE
FE signal output pin.
21
FE-
Pin for connecting FE signal gain setting resistance to TE pin.
22
AGND
GND for analog signal.
23
SP
Signal end output of CV+ and CV- pin input signal
24
SPI
Spindle amplifier input.
25
SPG
Connecting pin for gain setting resistance at the time of spindle 12cm mode.
26
SP-
Connecting pin for spindle phase compensation constant together with SPD pin.
27
SPD
Spindle control signal output pin.
28
SLEQ
Connecting pin for sled phase compensation constant.
29
SLD
Sled control signal output pin.
30
SL-
Input pin for sled delivery signal from micro computer.
31
SL+
Input pin for sled delivery signal from micro computer.
32
JP-
Input pin for tracking jump signal from DSP.
33
JO+
Input pin for tracking jump signal from DSP.
TGL
34
Input pin for tracking gain control signal from DSP.Gain low in case of TGL="H".
35
TOFF
Input pin for tracking off control signal from DSP.Off in case of TOFF="H".
36
TES
Output pin of TES signal to DSP.
37
HFL
(HIGH FREQENCY LEVEL) is used to judge whether main beam is located
48
NC
above pit or above mirror.
47
NC
38
SLOF
Sled servo off control input pin.
46
NC
39
CV-
Input pin for CLV error signal from DSP.
40
CV+
Input pin for CLV error signal from DSP.
45
DGND
41
RFSM
RF output pin.
44
SLI
42
RFS-
Pin for setting RF gain and EFM signal 3T compensation constant together with RFSM pin.
43
SLC
43
SLC
(SLICE LEVEL CONTROL) is output pin for controlling data slice level by RF waveshape DSP.
42
RFS–
44
SLI
Input pin for controlling data slice level by DSP.
45
DGND
GND pin digital system.
46
FSC
For Focs Smoosing capacita output pin.
41
RFSM
47
TBC
Tracking Balance control pin.
40
CV+
48
NC
NO CONNECT.
39
CV–
49
DEF
Output pin for detecting disc defect.
38
SLOF
50
CLK
Standard clock input pin. DSP 4.23MHz is input.
37
HFL
51
CL
Micro computer command clock input pin.
52
DAT
Micro computer command data input pin.
36
TES
53
CE
Micro computer command chip enable input pin.
35
TOFF
54
DRF
(DEFECT RF) RF level detecting output.
34
TGL
55
FSS
Focs serch select pin.
33
JP+
56
VCC2
VCC pin for servo system and digital system.
57
REF1
Connection pin for standard voltage capacitor.
58
VR
Standard voltage output pin.
59
LF2
Pin for setting constant at the time of detecting disc defect.
60
PH1
Pin for connecting condensor for RF signal peak hold.
61
BH1
Pin for connecting condensor for RF signal bottom hold.
62
LDD
APC circuit output pin.
63
LDS
APC circuit input pin.
VCC1
RF system VCC pin.
64
2 - 12
MCD 36 / MCD 40
DESCRIPTION
.
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