manualshive.com logo in svg

Akai PDP4216M, Руководство по обслуживанию, Страница: 21 / 86

Поделиться
Скачать
Akai PDP4216M Скачать руководство пользователя страница 21

1

2

3

4

5

6

A

B

C

D

6

5

4

3

2

1

D

C

B

A

Title

Number

Revision

Size

B

Date:

14-Oct-2005

Sheet    of 

File:

F:\4228\4228_temp_ddb\4228_Temp.DDB Drawn By:

14-DECODER_G

VIN4

75

VIN3

74

VIN2

73

VIN1

72

CIN

71

Y1/G1

2

U1/B1

1

V1/R1

3

FBIN1

79

Y2/G2

5

U2/B2

4

V2/R2

6

XTALI

62

XTALO

63

VOUT

70

VRT

66

VREF

78

VGAV

17

Y7

31

Y6

32

Y5

33

Y4

34

Y3

37

Y2

38

Y1

39

Y0

40

UV7

41

UV6

42

UV5

43

UV4

44

UV3

47

UV2

48

UV1

49

UV0

50

LLC2

27

LLC

28

AVO

54

HCLP

55

HS

56

VS

57

INTLC

53

OE#

18

FFI

E

19

FFWE

20

FFRST

21

FFRE

22

FFO

E

23

TEST

16

SCL

13

SD

A

14

RST#

15

VDD

10

VDDCAP

9

GNDCAP

12

P

L

VDD

29

YVDD

36

CVDD

45

S

P

VDD

52

AF

VDD

69

IS

VDD

76

VS

TBY

59

CLK5

60

F

P

DAT

58

CLK20

24

AS

GND

7

AS

GND

64

GND

11

AP

GND

25

AP

VDD

26

P

L

GND

30

YGND

35

CGND

46

S

P

GND

51

AF

GND

65

IS

GND

68

IS

GND

77

IS

GND

80

I2C

S

E

L

67

U1402

5VVG

GV33

C1434

C1433

C1432

C1423

RP1401

RP1402

RP1403

RP1404

R1409

C1437 C1435

C1438 C1436

SGND

SGND

SCL_S3V

SDA_S3V

C1431

C1430

R1402

R1401

REF_G

G_TVCVBS

C1417

L1408

R1403

C1424

MREST

5V

L1401

C1403

C1404

C1406

C1407

5VVG

SGND

C1441

C1442 C1443

C1444

C1445

C1446

C1447

C1448

GV33

C1405

C1409

C1410

C1411

C1412

C1413

C1414

5V

INPUT

3

GND

1

OUTPUT

2

TAB

4

U1401

C1440

C1450

C1451

ADR:0x8E

SGND

R1410

R1405

SGND

SGND

5VVG

C1439

X1401

R1416

SGND

G_TT_R

G_TT_G

G_TT_B

SGND

G_TT_FSO

C1466

C1467

C1468

GGE[7..0]

GBE[7..0]

GPEN

GVS

GHS

GCLK

FIELD

R1408
R1407

R1419

R1420

5VVG

G_SVideo_C

G_SVideo_Y

C1418

C1419

C1416

G_AVCVBS

GGE0

GGE1

GGE2

GGE3

GGE4

GGE5

GGE6

GGE7

GBE0

GBE1

GBE2

GBE3

GBE4

GBE5

GBE6

GBE7

TV_CVBS_S

CVBS_S_O

C1471

SGND

Q1401

R1404

R1412

R1413

R1406

C1464

C1463

TV_CVBS_S

C1422

C1421

C1420

C1415

GYCbCr_Cb

GYCbCr_Cr

GYCbCr_Y

C1425

C1426

C1427

L1406

L1405

L1404

SGND

C1472

C1473

C1474

SGND

L1402

C1428

C1449

SGND

L1411

C1454

C1456

SGND

R1417

R1418

R1426

R1425

R1424

L1407

C1460

C1459

R1415

SGND

R1421

TV_CVBS_S#

A5V

G_AVCVBS

GYCbCr_Y

GYCbCr_Cb

GYCbCr_Cr

R1422

TT-GHS

TT-GHS

GHS

R1423

GHS

L1412

R1414

SGND

R1427

All manuals and user guides at all-guides.com

all-guides.com

Содержание PDP4216M

Страница 1: ...ications Trouble Shooting Manual of PDP Module Spare Part list Exploded View If You Forget Your V CHIP Password Software Upgrade This manual is the latest at the time of printing and does not include...

Страница 2: ...persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying...

Страница 3: ...r high tempera ture components 8 Before returning the set to the customer always perform an AC leakage current check on the exposed metallic parts of the cabinet such as antennas terminals screwheads...

Страница 4: ...RAISED BY CHECKED BY NUMBER OF PAGE 10 RAISED BY DATE R D DEPARTMENT COMMERCIAL DEPARTMENT PRODUCTION DEPARTMENT Q A DEPARTMENT CUSTOMER SIGNATURE DATE NOTE Only documents stamped Controlled Document...

Страница 5: ...gnetic field no restricted 1 7 Control settings Brightness Contrast Tint Color set at Center 50 1 8 Power input 100 120Vac 60Hz 1 9 Ambient temperature 20 C 5 C 68 F 9 F 1 10 Display mode Resolution 1...

Страница 6: ...2kVdc for 1 sec 3 Display 3 1 Screen Size 42 Plasma display 3 2 Aspect Ratio 16 9 3 3 Pixel Resolution 1024x768 3 4 Peak Brightness 1000 cd m Typical Panel only 3 5 Contrast Ratio Dark room 5000 1 Ra...

Страница 7: ...X768 6 6 Weight 22 0kg 0 5 kg Net 6 7 Color 16 7 millions of colors R G B each 256 scales 6 8 Contrast Average 60 1 In a bright room with 150Lux at center Typical 5000 1 In a dark room 1 100 White Win...

Страница 8: ...ources AV S Video YPbPr1 YPbPr2 VGA or HDMI 7 2 STANDBY Button Switch on main power or switch off to enter power Saving modes 7 3 Main Power Switch Turn on or off the unit 8 OSD Function 8 1 Picture B...

Страница 9: ...ES 9 Agency Approvals Safety UL FCC cUL Emissions FCC class B 10 Reliability 11 1 MTBF 20 000 hours Use moving picture signal at 25 C ambient 11 Accessories User manual x1 Remote control x1 Stand x 1...

Страница 10: ...12 1024x768 48 84 60 00 65 00 13 1024x768 56 50 70 00 75 00 14 1024x768 60 00 75 00 78 75 15 1152x864 54 53 61 13 80 37 16 1152x864 63 86 70 02 94 51 17 1152x864 67 52 75 02 108 03 18 1280x960 60 02...

Страница 11: ...t from Main Window or Sub Window 6 P MODE Press the button to select different picture effect 7 TIME Press this button to pop up the Clock Set menu 8 SLEEP Press this button to select the sleep time 9...

Страница 12: ...2 SOURCE Press this button and use button to select the signal sources AV S Video YPbPr 1 YPbPr 2 VGA or HDMI 23 PIP Press this button to change different Picture Mode 24 MENU Press this button to pop...

Страница 13: ...CS 14 Power Cord Length 1 8m nominal Type optional 15 Cabinet 15 1 Color black colour as defined by colour plaque reference number 15 2 Weight W Ostand Net weight 34kg Gross weight 15 3 Dimensions W O...

Страница 14: ...play data Driver timing Memory Controller Driver Timing Controller Input Interface Controller Vcc 5V Va 55V 65V Vs 180V 190V Control Signal Serial Interface APL Data LVDS Input Applied Voltage level i...

Страница 15: ...HD2 Input D Sub15 VPC3230D Video decoder VPC3230D Video decoder 286229 V Chip CCD SAA5316 TV TEXTPRO LP262S20480T SRAM PI5V330 Switch AD9880 ADC HDMI Receive PW1231 De Interlace PW181 Image Processor...

Страница 16: ...Power supply board of Audio Amplifier MPT012A Main Video board Audio Tuner board Keypad board Remote control receiver board Remote control board All manuals and user guides at all guides com a l l g...

Страница 17: ...All manuals and user guides at all guides com...

Страница 18: ...939 C940 C941 C942 C943 C944 C945 C946 R909 R910 DDC_SDA3 DDC_SCL3 R918 R917 HDCP_SDA HDCP_SCL SGND R914 AVDD3 3V RP909 RP908 ADCR0 ADCR1 ADCR2 ADCR3 ADCR4 ADCR5 ADCR6 ADCR7 ADCG0 ADCG1 ADCG2 ADCG3 AD...

Страница 19: ...AD1 86 AD2 87 AD3 88 AD4 89 AD5 90 AD6 91 AD7 92 P2 1 93 P2 2 94 P2 3 95 P2 4 96 P2 5 97 P2 6 98 VSSC 99 P2 0 100 U1501 I O8 29 I O7 28 I O6 27 I O5 26 I O4 25 I O3 23 I O2 22 I O1 21 WE 5 CE1 30 CE2...

Страница 20: ...D V_SVideo_Y V_SVideo_C VYCbCr_Cb VYCbCr_Cr VYCbCr_Y SCL_S3V SDA_S3V C1125 C1126 C1127 L1106 C1122 L1105 C1121 L1104 C1120 SGND C1118 C1119 C1131 C1130 C1115 R1102 R1101 REF_V V_AVCVBS V_TVCVBS C1117...

Страница 21: ..._S3V SDA_S3V C1431 C1430 R1402 R1401 REF_G G_TVCVBS C1417 L1408 R1403 C1424 MREST 5V L1401 C1403 C1404 C1406 C1407 5VVG SGND C1441 C1442 C1443 C1444 C1445 C1446 C1447 C1448 GV33 C1405 C1409 C1410 C141...

Страница 22: ..._R V_TT_G V_TT_B V_TT_FSO SGND C860 C861 A5V L802 C801 C802 C805 C808 SGND Vin INTRO 13 SDA 14 SCK 15 SEN 4 SMS 6 HIN 5 VIDEO 7 CSYNC 8 LPF 9 VSS A 11 RREF 10 VDD 12 BOX 17 SDO 16 I2C SEL 1 G 2 B 3 R...

Страница 23: ...Y5 CS1 Y4 CS0 V4 EXTINT U10 NMI W10 DNC1 B20 DNC2 C19 DNC3 V14 PW181 MISC U1301D VDD1 E7 VDD2 E9 VDD3 E10 VDD4 E11 VDD5 E12 VDD6 E13 VDD7 E14 VDD8 E15 VDD9 F16 VDD10 H5 VDD11 H16 VDD12 J5 VDD13 K5 VDD...

Страница 24: ...115 VR7 116 PVCLK 105 RSET 24 VREFOUT 27 VREFIN 26 ADB 15 ADG 18 ADR 21 ADSVM 12 DR4 3 DHS 138 DVS 137 DCLK 136 DB7 148 DB6 145 DB5 144 DB4 143 DB3 142 DB2 141 DB1 140 DB0 139 DG7 156 DG6 155 DG5 154...

Страница 25: ...R1008 R1010 C1042 R1016 C1041 R1015 C1026 L1004 SGND 5 10 4 9 3 8 2 7 1 6 15 14 13 12 11 16 17 JP1001 5V VGAVS VGAHS VGAVS VGAHS VCLK 7 SCL 6 SDA 5 GND 4 NC1 1 NC2 2 NC3 3 VCC 8 U1008 R1021 C1003 R10...

Страница 26: ...407 TLCCT RSTINn RESET C406 D3V3B NMI R409 R410 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54...

Страница 27: ...INPUT 3 GND 1 OUTPUT 2 TAB 4 U502 LVD33 DHS DVS DEN DCLK DTXON ANDY 00 DRE0 DRE1 DRE2 DRE3 DRE4 DRE5 DRE6 DRE7 DGE0 DGE1 DGE2 DGE3 DGE4 DGE5 DGE6 DGE7 DBE0 DBE1 DBE2 DBE3 DBE4 DBE5 DBE6 DBE7 For sumsu...

Страница 28: ...13 OSCO 14 PA4 18 PA5 17 PA6 16 PA7 15 U601 C611 C610 R625 X601 R626 C609 P_DISPEN R641 R642 R643 IR_mcu key_stby P_ON SLEEP P_ON SLEEP 5VDetect VS_ON R639 R640 5V_mcu 5V_mcu V V MENU P P INPUT STAND...

Страница 29: ...DC 9 DD 12 U704 TT_SEL SGND A5V C709 L739 SGND TT_SEL SC1_BOX SC1_R SC1_G SC1_B SC1_BOX SC1_R SC1_G SC1_B TT_R TT_G TT_B TT_FSO TT_R TT_G TT_B TT_FSO V_TT_R V_TT_G V_TT_B V_TT_FSO V_TT_G V_TT_B V_TT_R...

Страница 30: ...Audio Board BH M CH 05 06 14 sch 1 Tue Aug 16 22 15 14 2005 All manuals and user guides at all guides com...

Страница 31: ...DUBHE OSD Ver1 1_NAKS sch 1 Mon Oct 18 11 47 11 2004 All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 32: ...0025 sch 1 Mon May 16 09 25 50 2005 All manuals and user guides at all guides com...

Страница 33: ...2 pc s Y Drive board 6 pc s X Extension boards 1 pc Control Signal Input and 1 pc Power board in the Module SET There are 6 pc s PCBs including 1 pc AUX PSU Board 1 pc Keypad board 1 pc Remote Contro...

Страница 34: ...All manuals and user guides at all guides com...

Страница 35: ...ard Dealing with the digital signal for output to panel 4 Y Sustainer Z Sustainer board 1 Receiving the signals from Control and high voltage supply 2 Output scanning waveform for Module 5 Y Drive boa...

Страница 36: ...SD and back light d Abnormal noise on screen 3 POWER No picture no power output 4 Z Sustainer a No picture b Color not enough c Flash on screen 5 Y Sustainer Darker picture with signals 6 X Extension...

Страница 37: ...d on control signal to power Then Power sends 5Vsc 9Vsc 24V and RLYON Vs ON to PCBs working This time VIF will send signals to display Image OSD on the panel and start to search available signal sourc...

Страница 38: ...ard Sound Processor AD9880 Analog HDMI Dual Display Interface PI5V330 Wideband Video Quad 2 Channel MUX DEMUX SM5304AV Video Buffer with Built in Analog LPF TDA2616 2 X 12 W hi fi audio power amplifie...

Страница 39: ...daptive temporal deinterlacing with film mode detection When used in combination with the new third generation scaler this advanced video processing technology delivers the highest quality video for a...

Страница 40: ...te 8 bit 140 MSPS monolithic analog interface optimized for capturing RGB graphics signals from personal computers and workstations Its 140 MSPS encode rate capability and full power analog bandwidth...

Страница 41: ...bles simple flexible cost effective solutions that require fewer components Features Built In Memory Controller Motion Adaptive Deinterlace Processor Intelligent Edge Deinterlacing Digital Color Lumin...

Страница 42: ...SCL DDCSDA 2 DATACK HSOUT VSOUT SOGOUT DE MUXES RGB YCbCr Matrix R G B 8X3 or YCbCr R G B 8X3 or YCbCr R G B 8X3 YCbCr 4 2 2 or 4 4 4 AD9880 A0 GENERAL DESCRIPTION The AD9880 offers designers the flex...

Страница 43: ...aking contrast brightness color saturation and tint for RGB YCrCb and CVBS S VHS high quality soft mixer controlled by Fast Blank PIP processing for four picture sizes or of normal size with 8 bit res...

Страница 44: ...nature of the Z86229 helps the device conform to the transmissionformat defined in the Television Decoder Circuits Act of 1990 and in accordance with the Electronics Industry Association specification...

Страница 45: ...MSP 34x0G has optimum stereo perfor mance without any adjustments All MSP 34xxG versions are pin compatible to the MSP 34xxD Only minor modifications are necessary to adapt a MSP 34xxD controlling so...

Страница 46: ...rectional Quad 2 channel multiplexer demultiplexer that is recommended for both RGB and composite video switching applications The VideoSwitch can be driven from a current output RAMDAC or voltage out...

Страница 47: ...All manuals and user guides at all guides com...

Страница 48: ...All manuals and user guides at all guides com...

Страница 49: ...All manuals and user guides at all guides com...

Страница 50: ...All manuals and user guides at all guides com...

Страница 51: ...All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 52: ...All manuals and user guides at all guides com...

Страница 53: ...pro grammable read only memory EEPROM organized as 4096 8192 words of 8 bits each The device s cascadable feature allows up to 8 devices to share a common 2 wire bus The device is optimized for use in...

Страница 54: ...ND allows normal write operations When WP is tied high to VCC all write operations to the upper quandrant 8 16K bits of memory are inhibited If left unconnected WP is internally pulled down to GND Mem...

Страница 55: ...pt and 8 stage prescaler On chip crystal and RC oscillator Watchdog Timer 1024 14 program memory ROM 64 8 data memory RAM Buzzer driving pair and PFD supported HALT function and wake up feature reduce...

Страница 56: ...6 7 8 9 H T 4 8 R 0 6 A 1 H T 4 8 C 0 6 1 8 D I P A S O P A 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 1 2 3 4 5 6 7 8 H T 4 8 R 0 6 A 1 H T 4 8 C 0 6 1 6 S S O P A P A 4 P A 5 P A 6 P A 7 O S C 2 O S C 1 V D D R...

Страница 57: ...etermined by pull high op tions The external interrupt and timer input are pin shared with the PC0 and PC1 respectively The external interrupt input is activated on a high to low transition RES I Schm...

Страница 58: ...d system HALT 5 mA 5V 10 mA ISTB2 Standby Current WDT Disabled 3V No load system HALT 1 mA 5V 2 mA VIL1 Input Low Voltage for I O Ports TMR and INT 0 0 3VDD V VIH1 Input High Voltage for I O Ports TMR...

Страница 59: ...CING THE PDP MODULE READ THE SAFETY PRECAUTIONS IN THIS MANUAL 2 WHEN REPLACEMENT PARTS ARE REQUIRED BE SURE TO USE REPLACEMENT PARTS SPECIFIED BY THE MANUFACTURER MODEL PDP42X2 English All manuals an...

Страница 60: ...ments for our confirmation Customer NAKS Model Name Part No Signature Date Approved by Reviewed by Prepared by Supplier LG Electronics Inc Model Name PDP42X2 000 Part No Signature Date PDP Engineering...

Страница 61: ...fers vivid colors with adopting AC plasma technology by LG Electronics Inc FEARURES High peak brightness 1000cd m2 Typical and high contrast ratio 5000 1 Typical enables user to create high performanc...

Страница 62: ...xel 3 RGB cells 900 H 676 V 300 H 676 V Green Cell basis 920 1 H 518 4 V 0 5mm 1005 H 597 V 61 2 D 1mm RGB Closed type R 1024 G 1024 B 1024 16 1 Kg 0 5 Kg Net 1EA 109 Kg 5 Kg 5EA 1BOX 16 9 Typical 100...

Страница 63: ...ASSY Description LVDS CTRL B D ASSY Y DRV UPPER B D ASSY Y DRV LOWER B D ASSY Y SUS B D ASSY Z SUS B D ASSY X LEFT B D ASSY X RIGHT B D ASSY English Formation and Specification of Module 5 External Ca...

Страница 64: ...English 19 Block Diagram Input Signal Full White Current typ rms All manuals and user guides at all guides com...

Страница 65: ...D and Z B D to CTRL B D 5 Measure the output wave of X Y Z B D with oscilloscope more than 200MHz and find the trouble of B D by comparing the output wave with below figure Measure Point fo Y B D TP B...

Страница 66: ...B Y B D Output wave 5 10 SF A Z B D Output wave 1Frame B Z B D Output wave 1 10 SF X B D Output wave 1 FRAME X B D Output wave 1 SF X B D Output wave Enlargement All manuals and user guides at all gui...

Страница 67: ...2 Left X B D Screen Display Form 1 4 of the screen doesn t be shown Equality with 2 1 2 2 The screen doesn t be shown as Data TCP Include not be shown part of Data COF quantity or a part 1 Replace th...

Страница 68: ...an FPC 1 It may be a problem between Scan FPC and Y DRVB D 2 Check the connection of Y DRV B D and Scan FPC 3 If the Scan IC is failed replace the Y DRV B D Check the compatibility Screen Display Form...

Страница 69: ...FPC attached panel DATA TCP attached on panel is out of order 3 Replace Module Screen Display Form 2 8 The screen has one or several horizontal line 1 In this case it isn t a problem about controller...

Страница 70: ...Vsetup 80 1V 42X2 2 Module All manuals and user guides at all guides com...

Страница 71: ...B D O Waveform state As shown Fig 3 3 When Ramp FET is damaged O Test Point Enlarge the after measuring GND B1 Y B D O Waveform state As shown Fig 4 O Measurement position Reset section enlargement wa...

Страница 72: ...Vsc 120V 42X2 2 Moduel All manuals and user guides at all guides com...

Страница 73: ...e partially When IC fail occurs it will be able to discover the trace which is burned O Test Point Enlarge the after measuring output TP of GND TCP O Waveform state Output wave doesn t come out O Meas...

Страница 74: ...Use B D applicated SN755870 TOP 6871QDH090B BTM 6871QDH091B All manuals and user guides at all guides com...

Страница 75: ...al PDP Division LG Electronics Inc NO P04 C Product Specification of PDP Module Confidential Page 33 40 Revision No 00 10 OCT 2004 6 OUTLINE DRAWING Front View All manuals and user guides at all guide...

Страница 76: ...Confidential Page 34 40 Revision No 00 10 OCT 2004 Rear View All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 77: ...uct 6871QYH042B Y SUS B D ASSY 2005 03 07 14 PDP42X2 2 42X2A initial Product 6871QZH047B Z B D ASSY 2005 03 07 15 PDP42X2 2 42X2A initial Product 6871QDH090B YDRV UPPER B D ASSY 2005 03 07 12 Initial...

Страница 78: ...17 2 Apply to 42X2A Model 4921QF2002B Y Vsetup Fet Assy HS51 2005 05 17 9 Initial Product 4921QP1027A Y IPM IC81 2004 06 17 1 Initial Product 0ILNRDI001A Crystal 2004 06 17 5 Initial Product 4921QF30...

Страница 79: ...to improve white_blinking afterglow 42X2 42X2 42X2DN03L 2004 12 27 13 Temporary ROM to improve miswriting for July 42X2 42X2 42X2DN02B 2004 08 10 5 Rom to improve contrast_ratio to january for defect...

Страница 80: ...g to january for defect module 42X2 42X2 42X2_DN03N 2005 01 05 16 ROM to improve High Temp miswriting 42X2 522 42X2A T_Dielec 42X2A_TD03A 2005 07 28 28 42X2A initial ROM DATA 42X2 2 42X2A B_Dielec 42X...

Страница 81: ...PCS 1 6 329 053010 70 SPONGE 530X10X7 0MM W ADHESIVE PCS 2 7 329 095510 70 SPONGE 955X10X7 0MM W ADHESIVE PCS 2 8 361 101261 01 CABLE TIE PCS 24 9 384 42D103 08H PVC SHEET FOR AKAI PCB PD42HAA USA PCS...

Страница 82: ...H SCREW PAN WASHER 3X6 B ZNP H PCS 16 46 602 305006 10 MACH SCREW WHR 3X6 NIP PCS 11 47 604 601020 00 MACHINE SCREW BINDING M6X1 0PX20MM B PCS 6 48 60D 407010 40 MACH SCREW W SPRING WASHER M4 0X0 7 PC...

Страница 83: ...10 512 42D102 01 SHEET 1160X1480 42D1 PCS 0 2857 11 E3404 157004 AC CORD UL 1 88M YY 3 ST3 YUNBIAO PCS 1 12 E7301 011002 BATTERY AA R6P1 5V 2 PCS 2 All manuals and user guides at all guides com...

Страница 84: ...All manuals and user guides at all guides com...

Страница 85: ...ack to an external control device such as a computer and software upgrade Type of connector D Sub 9 pin male 1 No Pin name 5 1 No connection 2 RXD Receive data 3 TXD Transmit data 4 DTR DTE side ready...

Страница 86: ...r exe Point Flash on the interface of the Flash Upgrader exe Press STANDBY button on the front panel or POWER button of Remote control Power indicator green the PDP is in power ON mode software start...

Отзывы:

Нет отзывов