CD-ROM 48X RF AMP

S1L9251X

INTRODUCTION

CD-ROM 48X RF AMP Chip is RF pre signal processor and processes signals from optical pick-up. This chip
processes main signal through summing amp, AGC block, EQ block, and generates SERVO error signals for
SERVO control. It can playback CD-ROM and CD-RW disc.

MAIN FEATURES (FEATURES, CHARACTERISTICS)

CD-ROM 48X

-- 1, 4, 8: CLV mode

-- Maximum Speed of 48X: CAV mode

Support CD-R/RW disc

RF Amp & Equalizer

Focus Error Amp

Tracking Error Amp (3-Beam)

Mirror (RFCT, RFRP) Signal Detection

Defect Signal Detection

Built-in AGC Function

ALPC (Automatic Laser Power Control) Block

Built-in RF Envelop Detector

SBAD Signal Generation

Signal Generation for Center Position Servo

Built-in Serial Interface Port

Power Down Mode

S1L9251X

CD-ROM 48X RF AMP

BLOCK DIAGRAM

Internal Block Diagram

LDO

SUM

VCC

GND

DVCC

DVC

SBAD

RFCLK

RFDATA

RFEN

VSS

VDD

DFCT

CC1

CC2

CDFCT

RFCT

CB2

CP2

RFRP

RFRPI

CP_ENV

RFEQO

AGCIN

CAGC

PLLF

LPFADJ

RFO

CM8

CM4

VCC

AGC

LPF

+
-

Peak

Bottom

Peak

offset

DVCC

+
-

Peak

DVCC

SERIAL

I/F

CLPF

CSERVO

CSERC

SEROUT

DVC

Peak

Bottom

Vbg

CD-ROM 48X RF AMP

S1L9251X

External Application

LDO

SUM

VCC

GND

DVCC

DVC

SBAD

VSS

SEROUT

RFCLK

VDD

DFCT

CC1

CC2

CDFCT

RFCT

CB2

CP2

RFRP

RFEQO

AGCIN

CAGC

PLLF

LPFADJ

RFO

CM8

CM4

SUM

LASER PICK UP

TE Output

VDD

Clock Input

Serial Data Input

Enable Signal Input

1.65V

VCC

2.5V Analog Voltage

Output

FE Output

SBAD Output

DVCC

DFCT Output

RFCT Output

RFRP Output

RF Output

GND

VCC

DSP

CLPF

Center Servo

Output

RFDATA

RFEN

RFRPI

CP_ENV

CSERC

CSERVO

S1L9251X

CD-ROM 48X RF AMP

PIN DESCRIPTION

Name

I/O

Description

Related Block

LDO

Output of ALPC block

ALPC

Input for ALPC block

ALPC

SUM

Input for ABCD signal

RFSUM

Input for A signal

RFSUM

Input for B signal

RFSUM

Input for C signal

RFSUM

Input for D signal

RFSUM

VCC

Power input for Analog Block

Analog

2.5V Reference voltage output

Bias

Input for E signal

TE Amp

Input for F signal

TE Amp

GND

Ground for Analog Block

Analog

DVCC

Power input for Digital Block

DSP

DVC

1.65V Reference Voltage output

Bias

Focus Error signal output

FE Amp

SBAD

Sub Beam ADD output

SBAD

Tracking Error signal output

TE Amp

VSS

Digital GND

Digital

CSERC

Time constant setting for center position servo

SERVO

CSERVO

Time constant setting for center position servo

SERVO

SEROUT

Error signal output for center position servo

SERVO

RFCLK

Clock input for serial interface

S I/F

RFDATA

Data input for serial interface

S I/F

RFEN

Data Enable input for serial interface

S I/F

VDD

Digital VDD

Digital

DFCT

Defect Detection Comparator output

DFCT

CC1

Bottom Hold output of Defect detection Amp

DFCT

CC2

DFCT Bottom Hold

DFCT

CDFCT

Capacitor for DFCT Bottom Hold

DFCT

RFCT

RFCT output , ENV output

Mirror

CB2

Capacitor for RFRP, RFCT

Mirror

CD-ROM 48X RF AMP

S1L9251X

SERIAL INTERFACE

Serial Interface Timing Graph

-- The Serial Interface controls the Disc type, Speed, AGC, and Laser Diode On/Off.

-- The Timing Diagram of the Serial Interface is shown below:

-- RFCLK : Clock synchronized with data from MICOM

-- RFDATA : Address and Data from MICOM

-- RFEN : Indicates Data is Enabled

CP2

Capacitor for RFRP, RFCT

Mirror

RFRP

RFRP output

Mirror

RFRPI

Input for MIRR

MIRR

CP_ENV

Capacitor for Envelope Hold

ENV

RFEQO

Summing and EQ signa of A,B,C,Dl

RFSUM

AGCIN

Input for AGC

AGC

CAGC

Hold Capacitor for AGC

AGC

CLPF

LPF output buffer REF connecting pin

AGC

PLLF

RF Frequency control for wide band PLL

LPFADJ

LPF Frequency select for wide band PLL

RFO

RF Signal Output

RFSUM

CM8

EQ Boost frequency for 8X speed

CM4

EQ Boost frequency for 4X speed

PIN DESCRIPTION (Continued)

Name

I/O

Description

Related Block

Address, 8-bit

Data, 8-Bit

RFEN

RFDATA

RFCLK

S1L9251X

CD-ROM 48X RF AMP

Control signals generated from each Address are as below:

ADDRESS 01H;
: RFEQ_SEL
: ABCD_ATT

ADDRESS 02H;
: EQG_CEN
: AGC_LVL
: C48_SEL
: CAV_SEL

ADDRESS 03H;
: AGCON
: AGCIN_Z
: GAIN_PLLF
: PUP_SEL

ADDRESS 04H;
: TE_LPF
: TE_ATT

ADDRESS 05H;
: DFCT_CNST
: FE_LPF
: FE_ATT

ADDRESS 06H;
: SERVO_OFST

ADDRESS 07H;
:TBAL

ADDRESS 08H;
: RFRP_FREQ
: RFRP_TH
: DFT_TH

ADDRESS 09H;
: SBAD_ATT
: RFRP_ATT1

ADDRESS 0AH;
: LD_ON

ADDRESS 0BH;
: RFRP_SEL

ADDRESS 0FH;
: MODE_SEL
:PDmode

Table 1. Address Number

ADD 01H

ADD 02H

ADD 03H

ADD 04H

ADD 05H

ADD 06H

ADD 07H

ADD 08H

ADD 09H

ADD 0AH

ADD 0BH

ADD 0FH

CD-ROM 48X RF AMP

S1L9251X

Serial Interface

Address: 01H

RFEQ_SEL (D7 - D4): EQ Mode

ABCD_ATT (D2 - D0): ABCD attenuate gain select

DATA

Function

RFEQ_SEL

RSV

ABCD_ATT

Initial Value

RF EQ SELECT

32X

26X

21X

19X

16X

13X

11X

8X(CAV)

8X(CLV)

MODE

6dB

2.5dB

0dB

2dB

3.5dB

5dB

6dB

S1L9251X

CD-ROM 48X RF AMP

Address : 02H

EQG_CEN (D6 - D4): Center gain fine control of EQ boost gain select

AGC_LVL (D1 - D0): Output level select of AGC Amp

DATA

Function

RSV

EQG_CEN

C48_SEL

CAV_SEL

AGC_LVL

Initial Value

CENTER BOOST GAIN

3.5dB

4.5dB

5.5dB

6.5dB

7dB

7.5dB

C48_SEL (D3)

: 4X, 8X select

0 : 4X

1 : 8X

CAV_SEL (D2)

: CAV, CLV select

0 : CAV mode

1 : CLV mode

LEVEL

0.75V

1.0V

1.25V

1.5V

CD-ROM 48X RF AMP

S1L9251X

Address : 03H

AGCIN_Z (D6 - D4): Input Impedance select of RF AGC

GAIN_PLLF (D2 - D0): Peak Frequency Change Sensitivity Select of RF_EQ.according to PLLF's Voltage

DATA

Function

AGCON

AGCIN_Z

PUP_SEL

GAIN_PLLF

Initial Value

AGC ON (D7)

1 : AGC ON

0 : AGC OFF

IMPEDANCE

240k

60k

40k

30k

20k

15k

10k

PUP_SEL (D3)

: RF_SUM or A, B, C, D select

0 : RF_SUM Pick_Up

1 : ABCD_Pick_Up

Frequency Change Sensitivity according to PLLF Voltage

6dB

4dB

2dB

0dB

2dB

4dB

6dB

S1L9251X

CD-ROM 48X RF AMP

Address : 04H

TE_LPF (D5 - D4): TE LPF frequency select

TE_ATT (D2 - D0): TE attenuate gain select

DATA

Function

RSV

TE_LPF

RSV

TE_ATT

Initial Value

MODE

40 kHz

80 kHz

120kHz

360kHz

MODE

6 dB

2.5 dB

0 dB

1.5 dB

2.5 dB

3.5 dB

5 dB

6 dB

CD-ROM 48X RF AMP

S1L9251X

Address : 05H

DFCT_CNST (D7 - D6): Short time constant of defect detect block select

FE_LPF (D5 - D4): FE LPF frequency select

FE_ATT (D2 - D0): FE attenuate gain select

DATA

Function

DFCT_CNST

FE_LPF

RSV

FE_ATT

Initial Value

DEFECT

100

S/V

12.5

S/V

5.6

S/V

MODE

40 kHz

80 kHz

120kHz

360kHz

MODE

FE ATT Gain

6 dB

2.5 dB

0 dB

1.5 dB

2.5 dB

3.5 dB

5 dB

6 dB

S1L9251X

CD-ROM 48X RF AMP

Address : 06H

SERVO_OFST (D7 - D0): Center position servo offset level
At "00", output of OFFSET is Min. At "FF", output of OFFSET is Max.

Address : 07H

TBAL (D7 - D0): Output voltage swing level is below when Input conditions are

E : 100mVpp 1kHz
F : -100mVpp 1kHz

DATA

Function

SERVO_OFST

Initial Value

DATA

Function

TBAL

Initial Value

TBAL

Output Voltage Level

1.25 Vpp

1 Vpp

0.85 Vpp

CD-ROM 48X RF AMP

S1L9251X

Address : 08H

RFRP_RFEQ (D7 - D6): RFRP PEAK-BOTTOM HOLD Frequency Select

DFT_TH (D5 - D3): DEFECT Slicer Level Select

RFRP_TH (D2 - D0): RFRP Level Selec

DATA

Function

RFRP_FREQ

DFT_TH

RFRP_TH

Initial Value

RFRP FREQ

RFRP LPF

40 kHz

80 kHz

160kHz

120 kHz

240kHz

360 kHz

720kHz

SLICE LEVEL

50mV

100mV

200mV

300mV

400mV

500mV

600mV

700mV

OFFSET LEVEL

300mV

200mV

100mV

0mV

100mV

200mV

300mV

S1L9251X

CD-ROM 48X RF AMP

Address : 09H

RFRP_ATT1 (D6 - D4): RFRP Output Level Select

* When 1Vpp, 7% modulation, 10kHz carrier input, output Vpp change amount.

SBAD_ATT (D2-D0): SBAD Output Gain Select

Address : 0AH

DATA

Function

RSV

RFRP_ATT1

RSV

SBAD_ATT

Initial Value

MODE

- 200mVpp

- 100mVpp

0mVpp

100mVpp

200mVpp

MODE

6 dB

2.5 dB

0 dB

1.5 dB

2.5 dB

3.5 dB

5 dB

6 dB

DATA

Function

RSV

LD_ON

Initial Value

LD_ON (D0)

: LD On/Off Select

0 : LD OFF

1 : LD ON

CD-ROM 48X RF AMP

S1L9251X

Address : 0BH

RFRP_SET (D0): RFRP Block Output Select

Address : 0FH

DATA

Function

RSV

RFRP_SEL

Initial Value

OUTPUT

RFRP, RFCT

ENVELOPE

DATA

Function

RSV

MODE_SEL

RSV

PDmode

Initial Value

MLDE_SEL (D4)

: CD-ROM, CD-RW Select

0 : CD-RW

1 : CD-ROM

PDmode (D0)

: Power Down Mode On/Off Select

0 : Power Down Mode

1 : Normal Mode

S1L9251X

CD-ROM 48X RF AMP

BLOCK DESCRIPTION

Tracking Error Amp

-- The Gain of the E, F signals are controlled by the Tracking Balance signal(TBAL).

-- The output of TE AMP is expressed by -K(E-F).

-- CD-ROM or CD-RW operation is selected by CDRW signal.

-- Output stage is compatible to 3.3 V Servo operation.

Focus Error Amp

-- The Gain of the input signals A, C and B, D can be adjusted by the Focus Balance signal.

-- FE signal is expressed by

K {(PAC)

(PBD)}.

-- CD-ROM or CD-RW operation is selected by CDRW signal.

-- Output stage is compatible to 3.3 V Servo operation.

.TE_LPF

.TE_ATT

.MODE_SEL

.TBAL

VOFST

.FE_LPF

.FE_ATT

VOFST

.Mode

CD-ROM 48X RF AMP

S1L9251X

AGC & EQ

-- Input level of RF AMP signal is convert to ouput level selected by AGC block.

-- It is discreminated that CD-ROM or CD-RW.

-- AGC Amp is designed to work with the Wide Range PLL.

-- Boost Control of the Summing Amp is possible using the EQ Control Switc

RFRP & RFCT Block & Envelope Detector

-- This circuit generates RF

s amplitude signals by detecting the upper envelope, using Servo Control signals

for Focus Error signal balance adjustment.

-- Capacitance connected to CE that decides the time-constant value.

-- RFRP is a block for detecting signals crossing the Track.

-- Using the AC-coupled ABCD signals, carries out Peak and Bottom hold operation.

Pick-UP

.Mode_SEL

.ABCD-ATT

RFEQO

AGCIN

AGC

CAGC

.AGCON/OFF
.AGC-LVL
.AGCIN_Z

LPF

PLLF LPFADJ

.GAIN_PLLF
.RFEQ_SEL

RFO

SUM

a
b

.PUP_SEL

.CAV_SEL

.EQG_CEN

.RFEQ_SEL

CM4

CM8

+
-

CLPFi

CLPF

+
-

PEAK

-HOLD1

BOTTOM

-HOLD1

+
-

PEAK

-HOLD2

BOTTOM

-HOLD2

RFRPI

RFCT

RFRP

+
-

vcc

Voffset

vcc

vofst

dvc

+
-

Peak

AGCIN

cp_env

S1L9251X

CD-ROM 48X RF AMP

Defect Detector Block

-- Block for detecting defects such as disc scratch or finger prints.

-- External capacitor decides the time constant value.

-- It detects ABCD signals through high speed peak hold and low speed bottom hold.

-- After add DC to high speed peak hold, .then compares it to low-speed peak hold output.

ALPC

-- Circuit for controlling the light power of the Laser Diode.

-- Laser Power fluctuation caused by voltage and temperature changes are detected by Monitor Photo

Diode

s output current, then it is able to control the stable output power of Laser Diode.

-- ALPC on/off is controlled by LDON switch.

+
-

Peak-

Hold

.RFRP_FREQ

CC2

DVCC

.DFT_TH

DFCT

CDFCT

CC1

+
-

A
B
C
D

.Mode_sel

vdc125

AVSS

CD-ON

AVDD

LDO

.LD_OFF

P-sub

CD-ROM 48X RF AMP

S1L9251X

SBAD

-- E, F signal are excuted tracking balance adjust and added, and passed LPF.

-- It is expressed by K (E + F)

Reference Block

-- This block generates Reference voltage.

-- The Output voltages are 1.65V (from RF part supply input) and 2.5V (from SERVO part supply input) .

Vdc Offset Block

-- It shifts the output stage to match the Servo and DSP block.

.TBAL

SBAD

.SBAD_ATT

VOFST

.Mode

1.65V

DVC

DVCC

2.5V

AVCC

VOFST

DVC

CD-ROM 48X RF AMP

S1L9251X

ELECTRICAL CHARACTERISTICS

Bias Block

Supply Voltage

Tracking Error Amp

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

VR Output Voltage

VR Voltage Measurement

2.4

2.5

2.6

VR Output Voltage1

VR1

VR=3mA Impression

2.4

2.5

2.6

VR Output Voltage2

VR2

VR=-3mA Impression

2.4

2.5

2.6

DVC Output Voltage

DVC

DVC Voltage Measurement

1.55

1.65

1.75

DVC Output Voltage1

DVC1

DVC=3mA Impression

1.55

1.65

1.75

DVC Output Voltage1

DVC2

DVC=-3mA Impression

1.55

1.65

1.75

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Operating Power Voltage

Vcc

4.5

5.0

5.5

Power Current

Icc

Vin = 0

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Tracking Balance
Adjustment Range

TBAL1

E: 1kHz Sine 100mVpp

F: 1kHz Sine(I) 100mVpp TBAL=FF

0.8

Vpp

TBAL2

E: 1kHz Sine 100mVpp

F: 1kHz Sine(I) 100mVpp TBAL=80

0.9

1.0

1.1

Vpp

TBAL3

E: 1kHz Sine 100mVpp

F: 1kHz Sine(I) 100mVpp TBAL=00

1.25

Vpp

BandWidth

(-3dB Freq.)

TBW1

E: 100mVpp Sine Frequency Sweep

F: 100mVpp Sine Frequency Sweep

kHz

TBW2

360

kHz

Offset Voltage

TOFS1

E,F: VR TBAL = 00 (CD-ROM mode)

TOFS2

E,F: VR TBAL = 00 (CD-RW mode)

320

High Output Voltage

THout

2.5

Low Output Voltage

TLout

0.5

Output Voltage 1

TEout1

E: 1kHz Sine 60mVpp

F: 1kHz Sine(1) 60mVpp (CD-ROM
Mode)

1.1

1.2

1.3

Vpp

Output Voltage 2

TEout2

E: 1kHz Sine 15mVpp

F: 1kHz Sine(1) 15mVpp (CD-RW
Mode)

1.0

1.2

1.4

Vpp

S1L9251X

CD-ROM 48X RF AMP

Focus Error AMP

AGC & EQ Block

Item

Symbol

Conditions

Min.

Typ. Max.

Unit

Output Voltage 1

FEout1

AC IN = 300mVpp(each) + Sine 1kHz + VR,
BD IN = VR,

1.1

1.2

1.3

Vpp

Output Voltage 2

FEout2

BD IN = 300mVpp(each) + Sine 1kHz + VR,
AC IN = VR,

1.1

1.2

1.3

Vpp

Output Voltage 3 (CD-R)

FEout3

AC IN = 75mVpp(each) + Sine 1kHz + VR,
BD IN = VR,

1.0

1.2

1.4

Vpp

Output Voltage 4 (CD-R)

FEout4

BD IN = 75mVpp(each) + Sine 1kHz + VR,
AC IN = VR,

1.0

1.2

1.4

Vpp

Voltage Gain Difference1

GFE1

GTE1-GTE2

Voltage Gain Difference2

GFE2

GTE3-GTE4

Bandwidth (-3dB Freq.)

FBW1

(A,C) : 100mVpp Sine
Frequency SWEEP
(B,D) : 100mVpp Sine(I)
Frequency SWEEP

FE_LPF = 00

kHz

TBW2

FE_LPF = 11

180

Offset Voltage

FOFF1

(A-D) : VR, GAIN_FE=8dB,
FEOFST = 80 (CD-ROM Mode)

FOFF2

(A-D) : VR, GAIN_FE=8dB,
FEOFST = 80 (CD-R/W Mode)

100

Output High Voltage

FHout

2.5

Output Low Voltage

FLout

0.5

Item

Symbol

Conditions

Min. Typ. Max.

Unit

Frequency Characteristic1

3dB Frequency at RFEQO , CAV mode,

Input=2.5V DC

MHz

GAIN Characteristic1

CAV Mode,CD-ROM Mode at RFEQO

GAIN Characteristic2

CAV Mode,CD-RW Mode at RFEQO

Peak Frequency1

Fp1

CLV Mode, 4X Mode

4.2

5.2

6.2

MHz

Peak Frequency2

Fp2

CLV Mode, 8X Mode

8.4

10.4

12.4

MHz

AGC Voltage Gain

GAGC

AGCIN=1Vpp, Sine, 1Meg, AGC level
Adjustment

0.75

1.5

Vpp

AGC Standard Output

GAGCOP

AGCIN=1Vpp, Sine, 1Meg

0.9

1.1

Vpp

Maximum Gain (Gpeak)
Range

RFEQO

(A-D):250mVppSweepingSine+VC, CLV
mode, 8X at 10.4MHz , EQG_CEN=3.5

2.5

3.5

4.5

EQG_CEN=5.5dB

4.5

5.5

6.5

EQG_CEN=7.5dB

6.5

7.5

8.5

CD-ROM 48X RF AMP

S1L9251X

RF Envelop Detector

RFRP

RFCT

Defect Detector

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Output Voltage 1

VOENV1

ABCD: Not inputting

0.4

Output Voltage 2

VOENV2

ABCD: 250mVpp(each) + Sine
500kHz + VR, No signal Standard

0.7

Output Voltage 3

VOENV3

ABCD: 250mVpp(each) + Sine
500kHz + VR

2.8

Item

Symbol

Conditions

Min. Typ. Max.

Unit

Output Level 1

VRPO1

RFRPI : 1.0Vpp 10kHz Sine 70% AM
fcarrier :1Mhz Modulation

0.9

1.1

Vpp

Output Level 2

VRPO2

RFRPI : 1.0Vpp 30kHz Sine 70% AM
fcarrier :1Mhz Modulation

0.7

Vpp

Output Level 3

VRPO3

RFRPI : 1.0Vpp 80kHz Sine 70% AM
fcarrier :3Mhz Modulation

0.7

Vpp

Output Level 4

VRPO4

RFRPI : 1.0Vpp 160kHz Sine 70% AM
fcarrier :6Mhz Modulation

0.7

Vpp

Output Level 5

VRPO5

RFRPI : 1.0Vpp 320kHz Sine 70% AM
fcarrier :10Mhz Modulation

0.7

Vpp

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Level

Vctl

RFRPI : 1.0Vpp 10kHz sine 70%
AM fcarrier : 1MHz Modulation

1.35

1.65

1.95

Item

Symbol

Conditions

Min. Typ. Max.

Unit

Detected Min. Operation
Input Voltage

VDFCT1

200Hz Square Wave Full AM fcar
1MHz Sine + Vc

0.3

0.5

Detected Max. Operation
Input Voltage

VDFCT2

1.8

High Output Voltage

Hout

2.5

Low Output Voltage

Lout

0.5

High Speed Peak Hold
Charge/discharge Time
Constant Range

HPHR

250mVpp 200Hz Square Wave Full AM fcar
1MHz Sine + Vc,
RFRP_FREQ: STEP Variation

5.6

100

uS/V

Low Speed Peak Hold
Discharge Time
Constant Range

LPHR

250mVpp 200Hz Square Wave Full AM fcar
1MHz Sine + Vc

100

uS/V

S1L9251X

CD-ROM 48X RF AMP

ALPC

SBAD

Item

Symbol

Conditions

Min. Typ. Max.

Unit

ALPC Operating Voltage PL

VAPPL

VPD=0mV, VLDON=0V

1.1

ALPC Operating Voltage PH

VAPPH

VPD=600mV, VLDON=0V

3.9

LD-OFF Voltage

VLDOF

LDC=L, VCC Standard

0.7

ALPC Operating Voltage HP

VAPHP

VPD=2.5V

3.9

ALPC Operating Voltage 1

VALPC1

IPD=0.8mA LD Impression, VLDON=0V

2.5

ALPC Operating Voltage 2

VALPC2

IPD=-0.8mA LD Impression, VLDON=0V

2.5

Item

Symbol

Conditions

Min.

Typ.

Max.

Unit

Voltage Gain 1

SBGv1

f=1kHz, CD-Rom mode

Voltage Gain 2

SBGv2

f=1kHz, CD-RW mode

Frequency Characteristics

SBfc

3dB point

kHz

Standard Operating Voltage

SBVopr1

VR Standard,CD-Rom mode

1.75

1.65

1.55

Standard Operating Voltage

SBVopr2

VR Standard, CD-RW mode

1.55

1.45

1.35

Output Upper Voltage

SBVoh

GND Standard

2.5

Output Lower Voltage

SBVol

GND Standard

0.5

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: S1L9251X