AIWA CSDED76
Service Manual

Ic DESCRIPTION-2 IC, LA9241 M
Pin No. 1 2
3

Pin Name FIN2 FIN1 E IF TB TEI TE

I/o I I I I subtracting from the F pin signal, I I I

Description Pin to which external pickup photo diode is connected. RF signal is created by adding I with the FIN1 pin signal, FE signal is created by subtracting from the FIN1 pin signal. I Pinto which external pickup photo diode is connected,

Pin No. 36 37

Pin Name TES HFL

I/o o o

Description Pin from which TES signal is output to DSP. �High Frequency Level� is used to judge whether the main beam position is on top of I bit or on top of mirror.

1
I

I
I

I
I
38

I
I
I

I
SLOF
Cv�, Cv+

I
I

I
4 5 6 7 8 9 I

I

I
I

Pin to which external pickup photo diode is connected, TE signal is created by

I
I

I I

I

Sled servo off control input pin.

I Pin to which external pickup photo diode is connected,
DC component of the TE signal is input. I Pin to which external resistor setting the TE signal gain is connected between the TE pin.

I I

39,40 41 42

I CLV error signal input pin from DSP. I RF output pin, RF gain setting and EFM signal 3T compensation constant setting pin together with 1 RFSM pin. �Slice Level Control� is the output pin which controls the RF signal data slice level by

I

RFSM RFS-

IO I 1

I I

1

I
I

o

I

TE signal output pin. TES �Track Error Sense� comparator input pin. TE signal is passed through a bandpass filter then input. Shock detection signal input pin.

I
I

43 44 45 46 47 48 49
50 51

I
I
I I
I

SLC SLI DGND FSC TBC NC DEF CLK
CL

Io I
I

I
TESI SCI

I
1 I I O

I

I DSP. Input pin which control the data slice level by the DSP. Digital system GND.

I

I Tracking gain time constant setting pin. I TA amplifier output pin. Pin to which external tracking phase compensation constants are connected between the TD and VR pins.

I I I
I I

I1I I �I
I I

I o I Output pin to which external focus search smoothing capacitor is connected.
I �Tracking Balance Control� EF balance variable range setting pin. I No connection, I Disc defect detector output pin. I Reference clock input pin. 4.23 MHz of the DSP is input.
I

I I I
I I I

12

I

TD-

I I I

I

I
I
I I

I� IO ]
I 1

-H---15 16 17

I Tracking jump signal (kick pulse) amplitude setting pin, I Tracking control signal output pin. I Focusing control signal output pin. Pin to which external focusing phase compensation constants are connected between the FD and FA pins.

Tracking phase compensation setting pin.

1 I
I I

I

Microprocessor command clock input pin.

I

I

I
I

TO FD FD-

IO IO I

52 53 54 55 56 57 58

I

DAT CE DRF FSS
VCC2

I I I I

I I

I Microprocessor command data input pin. I Microprocessor command chip enable input pin.

I

I

I
I I

I
I I

I I

o I �Detect RF� RF level detector output.
I
�

I

�Focus Search Select� focus search mode (* search/+ search) select pin. Servo system and digital system Vcc pin. Pin to which external bypass capacitor for reference voltage is connected. Reference voltage output pin.

18

FA

I

Pin to which external focusing phase compensation constants are connected between the FD� and FA� pins.

REFI VR I I I I
I

� o I I

19 20 I

FAFE I

I

Pin to which external focusing phase compensation constants are connected between the FA and FE pins.

1
I

59 60 61 62
63

LF2 PH1 BH1 LDD LDS Vccl

I Disc defect detector time constant setting pin. I Pin to which external capacitor for RF signal peak holding is connected. I Pin to which external capacitor for RF signal bottom holding is connected.

I I I I

o I FE signal output pin.
I I I I Pin to which external FE signal gain setting resistor is connected between the FE pin. Analog signal GND. No connection. � �

II
I I I

22 23

I

AGND NC

I I

o I APC circuit output pin.
I

I

I
I

I

I

APC circuit input pin.

I
I

-+-w26 27 28 29
30,31

o I Single ended output of the CV+ and CV� pin input signal.
1 I Pin to which external spindle gain setting resistor in 12 cm mode is connected.

64

I

I�

I RF system Vcc pin.

I I I

1

sPSPD SLEQ SLD
SL-, SL+

I
I
I I I
I

I

I Pin to which external spindle phase compensation constants are connected together
I with SPD pin. I Pin to which external sled phase compensation constants are connected.

o I Spindle control signal output pin.
I

I
I

o I Sled control signal output pin.
I I Sled advance signal input pin from microprocessor.

32,33 34 35

I I I

JP�, JPiTGL TOFF

1 1 I Tracking jump signal input pin from DSP.
I I I I I Tracking gain control signal input from DSP. Low gain when TGL = H. I Tracking off control signal input pin from DSP. Off when TOFF = H.

21

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