Sanyo DC-X8CT Service Manual page 35

IC BLOCK DIAGRAM & DESCRIPTION
IC101 LA9241M (Servo Signal Processor)
LA9240M (Servo Signal Processor)
Vcc1 LDS LDD BH1 PH1
64 63 62 61 60
APC
RF DET
FIN2 1
VCA
2
FIN1
I/V
3
E
BAL
VCA
4
F
5
TB
TE
6
TE-
7
TE
8
TESI
T.SERVO & T.LOGICK
9
SCI
TH 10
11
TA
TD- 12
F.SERVO & F.LOGICK
13
TD
14
JP
15
TO
FD 16
17 18 19 20
FD- FA FA- FE
No. Pin Name I/O
1 FIN2 I Connection Pin for Photo Diode of Pickup.
2 FIN1 I FIN2 + FIN1 = RF, FIN2 - FIN1 = FE
3 E I Connection Pin for Photo Diode of Pickup.
4 F I E - F = TE
5 TB I Input Pin for DC ingredient of TE Signal.
6 TE- I Connection Pin for Gain Setting Resistor of TE
Signal to TE Signal Pin.
7 TE O Output Pin for Tracking Error Signal.
8 TESI I Input Pin for Track Error Sense Comparator.
TE Signal through Band Pass, and Inputted.
9 SCI I Input Pin for Shock Detection.
10 TH I Connection Pin for Time Constant Setting of
Tracking Gain.
11 TA O Output Pin for TA Amplifier.
12 TD- I Connection Pin for Constant Tracking Phase
Compensation, Consist of between TD and VR.
13 TD I Connection Pin for Constant of Tracking Phase
Compensation.
14 JP I Connection Pin for Amplitude Setting of Tracking
Jump (Kick Pulse) Signal.
15 TO O Output Pin for Tracking Control Signal.
16 FD O Output Pin for Focusing Control Signal.
17 FD- I Connection Pin for Constant of Focusing Phase
Compensation, Consist of between FD and FA.
18 FA+ I Connection Pin for Constant of Focusing Phase
Compensation, Consist of between FD- and FA-.
19 FA- I Connection Pin for Constant of Focusing Phase
Compensation, Consist of between FA and FE.
20 FE O Output Pin for Focusing Error Signal.
21 FE- I Connection Pin for Gain Setting Resistor of FE
Signal to FE Signal Pin.
22 AGND - Ground for Analog Signal.
LF2 VR REF1 Vcc2 FSS DRF CE DAT CL CLK DEF
59 58 57 56 55 54 53 52 51 50 49
REF
É -com
INTER FACE
SLC
RF Amp
SPINDLE SERVO
SLED SERVO
21 22 23 24 25 26 27 28 29 30 31
FE- AGND SP SPI SPG SP- SPD SLEQ SLD SL- SL+
Function
No. Pin Name I/O
23 SP O Output Pin for Single End of Input Signal of the
48 NC
24 SPI
25 SPG
47 TBC
46 FSC
26 SP-
DGND
45
44 SLI
27 SPD O Output Pin for Spindle Control Signal.
43 SLC 28 SLEQ
42 RFS-
29 SLD O Output Pin for Sled Control Signal.
30 SL-
41 RFSM
31 SL+
40 CV+
32 JP-
39 CV-
33 JP+
38 SLOF
34 TGL
37 HFL
35 TOFF
TES
36
35 TOFF
36 TES O Output Pin for Track Error Sense Signal to Digital
34 TGL
37 HFL
33
JP+
38 SLOF
39 CV-
40 CV+
41 RFSM O Output Pin for RF Signal.
32
42 RFS-
JP-
43 SLC O Slice Level Control Signal is Output Pin.
44 SLI
45 DGND
46 FSC O Output Pin for Focus Search Smooth Condenser
47 TBC O Connection Pin for Variable Range Setting of
48 NC
49 DEF O Output Pin for Defect Detection of Disc.
50 CLK
51 CL
52 DAT
53 CE
54 DRF O Output Pin for Detect of RF Level.
55 FSS
56 VCC2
57 REFI
58 VR O Output Pin for Reference Voltage.
59 LF2
60 PH1
61 BH1
62 LDD O Output Pin of APC (Automatic Power Control) Circuit.
63 LDS
64 VCC1
- 46 -
Function
CV+, CV- Pin.
I Input Pin for Spindle Amplifier.
I Connection Pin for Gain Setting Resistor, when
Spindle 12 cm Mode.
I Connection Pin for Constant of Spindle Phase
Compensation with SPD Pin.
I Connection Pin for Constant of Sled Phase
Compensation.
I Input Pin for Sled Signal from Micro Processor.
I
I Input Pin for Tracking Jump Signal from Digital
I Signal Processor.
I Input Pin for Tracking Gain Control Signal from
Digital Signal Processor. TGL = H : Gain Low
I Input Pin for Tracking Off Control Signal from Digital
Signal Processor. TOFF = H : OFF
Signal Processor.
I High Frequency Level Signal Use Detection
Main-Beam Position is on the pit or mirror.
I Input Pin for Sled Servo Off Control.
I Input Pin for Constant Linear Velocity Error
I Signal from Digital Signal Processor.
I Connection Pin for Gain Setting of RF and
Constant Setting of 3T Compensation of the
EFM Signal with RFSM Pin.
It Control Level of Data-Slice by Digital Signal
Processor of the RF Waveform.
I Input Pin for Level Control of Data-Slice by
Digital Signal Processor.
- Ground for Digital Signal.
EF Balance.
- No Connect
I Input Pin for Reference Clock Pulse.
(4.23 MHz of Digital Signal Processor)
I Input Pin of Clock Pulse for Command from
Micro Processor.
I Input Pin of Data for Command from Micro
Processor.
I Input Pin of Chip Enable for Command from Micro
Processor.
I Select Pin for Focus Search Mode
- VCC for Servo and Digital Root.
I Bus Control Connection Pin for Reference Voltage.
I Connection Pin for Time Constant Setting of
Detect Detection of the Disc.
I Capacitor Connection Pin for Peak-hold of RF Signal.
I Capacitor Connection Pin for Bottom-hold of
RF Signal.
I Input Pin of APC (Automatic Power Control) Circuit.
I VCC for RF Root.