Kenwood KRF-V7020D Service Manual Download Page 1

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AUDIO VIDEO SURROUND RECEIVER

KRF-V7020D/V8020D
VR-307/309/357

SERVICE MANUAL

Illustration is KRF-V7020D(Y).

–

Font glass
(B10-3458-02)

Knob
(K27-2293-04)

Knob
(K29-7370-02)

Phone jack
(E11-0127-05)

Foot
(J02-1407-03)

KENWOOD badge
(B43-0302-04)

Knob
(K29-7326-04)

Knob
(K29-7323-03)

Knob
(K29-7325-04)

AC power cord
(E30-2605-05)

Phono jack (6Px2)
(E63-0047-15)

Phono jack
(E63-0164-05)

Miniature phone jack
(E11-0293-05)

Phono jack
(E63-0094-05)

Phono jack
(E63-0093-05)

Phono jack
(E63-1080-05)

Phono jack (4Px2)
(E63-0046-15)

Power cord bushing
(J42-0083-05)

AC outlet
(E03-0148-05)

Optical receiving module
(W02-1181-05)

Lock terminal board
(E70-0052-05)

Screw terminal board
(E70-0100-05)

Lock terminal board
(E70-0047-05)

Metallic cabinet
(A01-3685-01)

Slide switch
(S62-0034-04)

Slide switch
(S62-0001-04)

Summary of Contents for KRF-V7020D

Page 1: ...29 7323 03 Knob K29 7325 04 AC power cord E30 2605 05 Phono jack 6Px2 E63 0047 15 Phono jack E63 0164 05 Miniature phone jack E11 0293 05 Phono jack E63 0094 05 Phono jack E63 0093 05 Phono jack E63 1080 05 Phono jack 4Px2 E63 0046 15 Power cord bushing J42 0083 05 AC outlet E03 0148 05 Optical receiving module W02 1181 05 Lock terminal board E70 0052 05 Screw terminal board E70 0100 05 Lock termi...

Page 2: ... note that resetting the microcomputer will clear the contents of the memory and returns the unit to the state it was in when it left the factory With the power cord plugged in turn the POWER key OFF Then while holding down the ON STANDBY key press POWER For U S A and Canada For other countries FM T90 0836 05 RC R0508 R0608 RC R0712 Battery cover A09 0366 08 Battery cover A09 1123 08 E03 0115 05 i...

Page 3: ...357 3 DISASSEMBLY FOR REPAIR 1 Remove the 8 screws 1 2 3 remove the rear panel 2 Connect the GND of the rear panel and the chassis the GND of the mounting hardware and the chassis with 2 alligators clip 4 1 2 2 4 4 4 3 x2 x2 x2 x2 ...

Page 4: ...AT RANDOM 100 DISPLAY ENT 10 LISTEN MODE SOUND SUBWOOFER 2 3 1 5 6 4 8 9 7 0 1 2 3 7 8 9 4 5 6 0 8 7 4 6 BAND P CALL P CALL POWER Remotecontrolunit RC R0608 R0508 A SPEAKERS B BASS BOOST MONITOR SOURCE DIRECT INPUT MODE LISTEN MODE SOUND SETUP MULTI CONTROL INPUT SELECTOR VOLUME CONTROL DTS DOLBY DIGITAL VIRTUAL SURROUND DOLBY DIGITAL VIRTUAL SURROUND DOWN UP STANDBY AV SURROUND RECEIVER ON STANDB...

Page 5: ...thesidefacingawayfromthefront of the deck BAND 6 key If tuner is selected as the input source this key functions as the band selector key IfCDisselectedastheinputsource thiskey functions as the play pause key IfMDisselectedastheinputsource thiskey functions as the play key DISC SKIP A B 100 key IfCDisselectedastheinputsource thiskey functionsasthemulti CDplayerdiscskipkey If TAPE is selected as th...

Page 6: ...h PRE OUTPUT CXP82852 139Q u COM INPUT SEL TUNER TC9162 D1 4 1 2 2 2 1 2 1 2 2 2 2 2 IC10 IC10 IC12 IC11 IC11 IC12 SP OUTPUT 5CH SP 28 3V 8 COXIAL VIDEO3 SUB S5 S2 DIG S4 L R MIX IC10 S3 LS RS S7 NOSUB ANA S1 REC OUT BUF IC9 S1 S2 S3 S4 S4 S5 S6 S7 S8 S1 S2 S3 IC6 3 3 ANALOG REC S7 DIGITAL REC S8 Q43 Q44 D3 A V R for for DSP A V R 3 3V IC14 6dB ATT MUTE SYNC AC3 DECODER SUB DSP B A A B YSS902 YSS9...

Page 7: ...DEO INPUT SELECTOR VIDEO 1 SPEAKER A ON SPEAKER B OFF BASS 0dB TREBLE 0dB INPUT LEVEL 0dB SOURCE DIRECT OFF MONITOR OFF DIMMER DIMMER 1 LIGHTEST LISTEN MODE STEREO VIRTUAL SURROUND OFF INPUT MODE DIGITAL AUTO SUB WOOFER YES ON FRONT SP SIZE NORMAL CENTER SP SIZE NORMAL SURROUND SP SIZE NORMAL DISTANCE Fch 10ft 3m Cch 10ft 3m Sch 10ft 3m FRONT L R LEVEL 0dB CENTER LEVEL 0dB REAR LS RS LEVEL 0dB SUB...

Page 8: ...501 REMOCON VIDEO SELECTOR IC TC9163 9164 CXP82852 139Q X00 POWER Relay K1 SP A RELAY K1 SP B RELAY K2 SURR RELAY K3 CENTER RELAY K4 X08 IC1 DSP IC X08 IC2 DIR ADC DAC YSS902 or YSS912 CS4226KQG CRYSTAL X08 IC5 FUNCTION SW X08 IC11 VOLUME IC M62446FP LC72131 TC9162 12 KR0 13 KR1 14 KR2 81 KS0 P CH DOWN ON STANDBY SPEAKER A 80 KS1 P CH UP DIMMER SPEAKER B 79 KS2 BAND LISTEN MODE DOLBY VIRTUAL 78 KS...

Page 9: ...pe 31 DSP CS O DSP YSS902 912 CS output 32 CODEC CS O CS4226 CS output 33 PLL DO I Pll ic DO signal input 34 PLL ST I Tuner STEREO signal detection port L STEREO 35 PLL SD I Tuner SD signal detection port L TUNED 36 RCV CE I Receiver CHIP ENABLE signal port L ENABLE 37 Avss Analog GND 38 RESET I Microproessor RESET signal 39 40 8MHz I Main clock generation 8MHz 41 Vss Microprocessor GND 42 None I ...

Page 10: ...l H LED ON 66 DOL DIG LED O Dolby digital LED control H LED ON 67 DOL VIR LED O Dolby virtual LDE control H LED ON 68 DTS LED O DTS LED control H LED ON 69 70 None O No connect 71 PACk CTL O Non oscillation of power pack ic at power off L STOP OSCILLATION 72 DSP IC O DSP YSS902 912 CS4226 initial clear 73 None O No connect 74 81 P1 8 KS7 0 O Display segments 1 8 key scan 7 0 82 88 P9 15 O Display ...

Page 11: ...K0 SDWCK0 SDIA0 SDIA1 SURENC STREAM0 7 OPERATION CLOCK 30MHz KARAOKE MUTE CRC AC3DATA DTSDATA NONPCM PLL DELAY RAM L R Ls Rs C LFE INPUT BUFFER CONTROL REGISTER U COM INTERFACE 24 24 Main DSP Dolby digital ProLogic DTS DECODER COEFFICIENT PROGRAM RAM 24 16 Sub DSP DATA RAM SDOB3 RAMD RAM data RAMA RAM address SDOB2 SDOB1 SDOB0 SDWCK1 SDBCK1 EXT RAM INTERFACE CONT SDOACKSEL SDIBCKSEL SDOBCKSEL ERAM...

Page 12: ...P C LFE SWch 46 SDO1 O PCM output port from sub DSP LS RSch 47 SDO0 O PCM output port from sub DSP FL FRch 48 49 No connect 50 Vss GND 51 Vdd2 Power supply 3 3V 52 59 No connect 60 Vss GND 61 No connect 62 IC I Initial clear port 63 64 No connect 66 CS I Microprocessor interface chip selector input port 67 SO O Microprocessor interface serial data output port 68 SI I Microprocessor interface seria...

Page 13: ...O1 VIDEO2 VIDEO3 MONITER ANALOG INPUT DIGITAL STEREO INPUT DIGITAL except STEREO 1 It s open except STEREO VIRTUAL on DTS 2 It s the same with MONITOR output 3 It s the same MONITOR OFF 6 SURROUND FUNCTION IC TC9162AF X08 IC5 PIN NO 2 27 3 26 5 24 6 23 8 21 9 20 11 18 INPUT SW NO R1 L1 R2 L2 R3 L3 R4 L4 R5 L5 R6 L6 R 7 L 7 OUTPUT ANALOG DIGITAL RS LS R L SUB W VIDEO3 NO SUB W NO SUB W TEST TONE IN...

Page 14: ...v Selector L or R Pilot 6 75kHz dev 70dBf ANT input B IFT TUNER A1 Minimum distortion L or R 98 0 MHz 2 TUNING LEVER A 98 0MHz MONO 1kHz 75kHz dev 25dBf ANT input B VR1 TUNER UNIT Adjust VR1 and stop at the point where ED51 TUNED goes on MONO 98 0 MHz FM SECTION SELECTOR FM A B C REC OUT D AM SG FM MPX SG FM MPX SG POLAR SG AC voltmeter Oscilloscope Distortion meter Dummy antenna ...

Page 15: ...11 VR 307 X09 6160 10 VR 309 X09 6160 11 UNIT No UNIT No U S A K6 DESTINATION CANADA P6 DESTINATION COUNTRY ABB 0 10 AUSTRALIA X8 PX CHINA Y8 C8 0 71 3 01 2 91 VR 357 X00 2910 11 GENERAL MARKET M7 0 20 KRF V8020D X09 291X XX ABB COUNTRY MALAYSIA GENERAL MARKET M8 I8 DESTINATION 0 20 UNIT No AUSTRALIA X7 CHINA PX C7 Y7 0 71 SHANGHAI V7 92 11 2 91 3 01 ABB X00 291X XX X00 2892 11 KRF V7020D COUNTRY ...

Page 16: ...and capacitors PC BOARD Component side view POWER SUPPLY UNIT CENTER SPEAKER SPEAKERS FRONT AC OUTLET X00 F 6 1 3 F 6 X00 C L R 1 4 X00 D 6 X00 B 6 A 6 X00 291X XX POWER PHONES 2 1 1 3 2 1 1 2 2 1 1 6 1 5 240V C 6 AC220 120V AC110 AC110 240V AC220 120V X00 1 6 5 1 B E B E CONTROL SYSTEM ...

Page 17: ... C123 C124 C121 C122 C128 C126 C157 C161 C158 C146 C145 C150 C148 C19 C2 C59 C58 C21 C203 C201 R141 R6 R5 R7 R14 R13 R16 R15 R144 R36 C137 C141 C147 R203 R206 R210 R208 R48 14 8 7 1 1 30 31 50 51 80 81 100 1 11 12 22 23 33 44 34 I O G 8 5 4 1 1 4 5 8 8 5 4 1 8 5 1 4 1 4 8 5 1 21 22 42 MON V1REC VIDEO1 VIDEO2CD VIDEO3 VIDEO2 VIDEO3 SUPPLY POWER BUF SGND BUSY SDATA GND DIR AD DA 16 8 VIDEO SEL LPF D...

Page 18: ...C107 C104 C115 C116 C308 C117 C165 C114 C113 C118 C172 C171 C168 C167 C166 C111 C112 R113 R112 R111 R108 R107 R110 R109 R303 C328 C327 R160 R280 R287 R295 R116 R115 R352 R351 C237 C238 C323 C321 C325 C326 R161 R304 C25 C267 C265 C268 C266 R279 R292 C273 C271 C274 C272 R288 R262 R265 R261 R294 R307 C324 C322 C329 C330 C277 C279 C309 C314 C311 C315 C313 C310 C316 C285 C284 K3 K4 K1 R311 R312 K2 C8 C...

Page 19: ...2 NO S1 COUNTRY DESTINATION CANADA U S A L72 0596 R29 P7 0 10 100 NO YES UNIT No K7 ABB R15 R14 A 82 4 7K NO 22K 6 2K 0 033 15K R27 R23 28 R25 C30 R72 31 73 LA1837 MS2 NO YES NO YES IC1 CF1 2 CF3 L4 5 W56 CN2 NO S1 CHINA AUSTRALIA COUNTRY GENERAL MARKET DESTINATION PX L72 0531 3 3K C8 X8 0 71 Y8 M8 0 21 NO 270 YES NO NO 18K 7 5K YES NO 0 022 8 2K YES UNIT No ABB R14 A R15 82 R23 R25 R27 28 R29 C30...

Page 20: ... C45 220P C5 1000P C6 1000P 220 R4 220 R8 220 R9 0 1 C4 R25 2 2K R20 100K C17 0 01 C20 4 7u35 R24 220 C18 1000P C10 330P R16 100K 3 65 66 4 5 6 L2 L6 47u25 C26 0 1 C27 75 R29 47P C28 75 R42 47P C44 7 2 1 8 3 4 6 5 B GND R21 220 1K R22 R23 220 R15 220 1K R2 R12 220 R10 220 R11 220 220 220 C33 4 7K R31 47K R27 2 2K C34 22P 0 1 C30 1K R18 C32 0 1 C41 22P R40 4 7K R41 47K R32 4 7K C29 22P R39 2 2K 22P...

Page 21: ...20P C61 S1 SD SB IC7 9 41 40 39 B B 5 4 8 11 13 2 UNIT No 0 10 CANADA DESTINATION COUNTRY U S A ABB K6 P6 R2 46 59 60 NO YSS902 YES YES C22 25 IC1 6 25MHz X1 IC15 YES YES X2 A NO R21 23 U S A K8 CANADA P8 0 11 DESTINATION COUNTRY ABB UNIT No YSS912 YES NO NO 12 288MHz YES IC1 A IC15 X2 X1 59 60 R2 46 NO NO R21 23 C22 25 U S A K7 CANADA P7 0 10 DESTINATION COUNTRY ABB UNIT No YSS902 NO YES YES 6 25...

Page 22: ...50 15V IC10 12 22u16 C329 C330 22u16 C229 470P R227 18K C230 470P R228 18K R230 R368 R225 10K R226 10K R229 R367 Q3 8 15V R231 18K C234 100P C238 1 4 3 R232 18K 2 10u50 0 01 C202 C233 100P 7 6 8 5 15V 10u50 C237 100P C321 15V 15V 15V 15V 15V 15V 15V 15V 15V B B 30V 30V 30V 15V 15V 15V 24 5 22 7 4 25 8 21 11 18 8 21 7 22 6 23 4 8 5 25 21 24 6 8 7 22 23 21 15 16 10 11 1 3 4 5 6 7 8 9 10 11 7 6 12 9 ...

Page 23: ...LIA X8 MALAYSIA PX COUNTRY I8 M8 ABB Y8 GENERAL MARKET DESTINATION AUSTRALIA CHINA X7 C7 DESTINATION COUNTRY PX ABB Y7 M7 DESTINATION CANADA COUNTRY U S A P7 ABB K7 CANADA U S A K8 P8 K6 U S A DESTINATION CANADA P6 DESTINATION COUNTRY ABB UNIT No 3 02 0 72 0 22 3 01 0 71 0 21 UNIT No 0 10 UNIT No 0 11 R13 47K UNIT No 0 10 UNIT No NO C3 A A A A A B B B B B NO YES C1 2 NO D1 YES D4 YES 47K NO NO C1 ...

Page 24: ...J1 T1 W3 P1 R1 W1 2 CHINA SHANGHAI C7 GENERAL MARKET AUSTRALIA PX X7 M7 Y7 DESTINATION COUNTRY ABB L07 2568 05 0 20 E03 0149 05 UNIT No T1 J1 NO NO NO NO 2 W1 R1 P1 W3 2 91 3 01 0 71 V7 92 11 L07 2569 05 L07 2129 05 E03 0148 05 E03 0361 05 E03 0325 05 E03 0361 05 YES GENERAL MARKET DESTINATION AUSTRALIA PX CHINA COUNTRY L07 2569 05 X8 0 71 E03 0325 05 L07 2568 05 0 20 M8 Y8 C8 3 01 2 91 UNIT No AB...

Page 25: ...R592 1K 1u50 C525 C521 0 01 100K R583 220 1 4W R585 R586 220 1 4W 10K R591 4 7u35 4 7u35 5 5 9 8 R559 330 R550 100K 100K R558 R560 100K R561 R557 100K 330 R552 470 R553 470 R554 470 R565 10K R564 10K R563 10K R544 100K C505 0 01 R551 100 0 01 C513 0 01 C520 R570 200 R572 220 R569 220 R571 220 10K R577 R582 10K C519 0 01 C512 0 01 R581 R576 10K 10K C518 0 01 C511 0 01 R580 R575 10K 10K A501 R568 22...

Page 26: ... MODE S502 SOUND S514 SETUP S519 MALTI CONTROL S518 INPUT SELECTOR S517 VOLUME CONTROL AC110 120V AC220 240V AC110 120V AC220 240V X00 C 6 S 2 S 3 A B C D E F G H J M4x8 ø2 6x8 Push rivet ø2 6x8 BLK ø3x6 BLK ø3x8 BLK ø3x8 ø3x23 ø3x14 N09 1966 05 N09 3411 05 N29 0216 05 N82 2608 45 N88 3006 45 N89 3008 45 N89 3008 46 N89 3023 46 N89 3014 46 VIDEO 1 2 3 A B SYSTEM CONTROL VIDEO OUT VIDEO OUT VIDEO I...

Page 27: ...Q Russia H Korea M Other Areas indicates safety critical components B60 4134 00 INSTRUCTION MANUAL TC RC M8I8 B60 4139 00 INSTRUCTION MANUAL EN AC 3 KPYMXI B60 4140 00 INSTRUCTION MANUAL FR AC 3 P B60 4141 00 INSTRUCTION MANUAL ES TC AC 3 M7 B60 4142 00 INSTRUCTION MANUAL SC AC 3 CV B60 4144 00 INSTRUCTION MANUAL EN RC K7P7 B60 4144 00 INSTRUCTION MANUAL EN RC K8P8 B60 4144 00 INSTRUCTION MANUAL E...

Page 28: ...T Europe E Europe G Germany V China Shanghai Y AAFES Europe X Australia Q Russia H Korea M Other Areas indicates safety critical components D1 4 S5688B DIODE D1 4 1SR139 400 DIODE D5 HZS6 2N B2 ZENER DIODE D5 MTZJ6 2 B ZENER DIODE D6 7 HSS104A DIODE D6 7 1SS133 DIODE D8 HZS2 7N B2 ZENER DIODE D8 MTZJ2 7 B ZENER DIODE D9 HSS104A DIODE D9 1SS133 DIODE Q1 2SC3940A R S TRANSISTOR Q2 2SC2003 L K TRANSI...

Page 29: ...ety critical components R16 RK73FB2A220J CHIP R 22 J 1 10W R17 RK73FB2A362J CHIP R 3 6K J 1 10W R18 RK73FB2A302J CHIP R 3 0K J 1 10W R19 RK73FB2A822J CHIP R 8 2K J 1 10W R20 RK73FB2A392J CHIP R 3 9K J 1 10W R23 RK73FB2A332J CHIP R 3 3K J 1 10W YMCXIV R23 RK73FB2A472J CHIP R 4 7K J 1 10W KP R25 RK73FB2A183J CHIP R 18K J 1 10W YMCXIV R25 RK73FB2A223J CHIP R 22K J 1 10W KP R27 28 RK73FB2A512J CHIP R ...

Page 30: ...B1E104K CHIP C 0 10UF K C41 42 CC73FCH1H220J CHIP C 22PF J C43 CK73FB1E104K CHIP C 0 10UF K C44 CC73FSL1H470J CHIP C 47PF J C45 CC73FSL1H221J CHIP C 220PF J C46 CC73FSL1H470J CHIP C 47PF J C50 52 CE04KW1C100M ELECTRO 10UF 16WV C55 CC73FSL1H470J CHIP C 47PF J C56 CE04KW0J471M ELECTRO 470UF 6 3WV C57 CE04KW1A470M ELECTRO 47UF 10WV C58 59 CK73FB1H103K CHIP C 0 010UF K C60 61 CC73FSL1H221J CHIP C 220P...

Page 31: ...er Areas indicates safety critical components R23 RK73FB2A221J CHIP R 220 J 1 10W 67 R24 RK73FB2A221J CHIP R 220 J 1 10W R25 27 RK73FB2A222J CHIP R 2 2K J 1 10W R28 RK73FB2A105J CHIP R 1 0M J 1 10W R29 RK73FB2A750J CHIP R 75 J 1 10W R30 RK73FB2A472J CHIP R 4 7K J 1 10W R31 RK73FB2A473J CHIP R 47K J 1 10W R32 RK73FB2A472J CHIP R 4 7K J 1 10W R33 36 RK73FB2A102J CHIP R 1 0K J 1 10W R37 RK73FB2A302J ...

Page 32: ... H Korea M Other Areas indicates safety critical components IC18 L78M05T MOS IC 5 0V 0 5A REG 8 IC19 L79M05T MOS IC 8 Q1 2SC4081 R S TRANSISTOR Q1 2SD1819A Q R TRANSISTOR Q2 2SA1576A R S TRANSISTOR Q2 2SB1218A Q R TRANSISTOR A1 1C W02 1181 05 OPTIC RECEIVING MODULE D500 502 B30 2545 05 LED RED3 160 D527 B30 2545 05 LED RED3 160 C1 2 CK45FF1H103Z CERAMIC 0 010UF Z KPC C3 C91 1480 05 MP 0 22UF 250WV...

Page 33: ...ts L Scandinavia K USA P Canada R Mexico C China I Malaysia Y PX Far East Hawaii T Europe E Europe G Germany V China Shanghai Y AAFES Europe X Australia Q Russia H Korea M Other Areas indicates safety critical components C512 514 CK73FB1H103K CHIP C 0 010UF K C517 CE04KW1H010M ELECTRO 1 0UF 50WV C518 CK45FF1H103Z CERAMIC 0 010UF Z C519 520 CK73FB1H103K CHIP C 0 010UF K C521 CK45FF1H103Z CERAMIC 0 ...

Page 34: ...ny V China Shanghai Y AAFES Europe X Australia Q Russia H Korea M Other Areas indicates safety critical components R239 240 RK73FB2A183J CHIP R 18K J 1 10W R241 242 RK73FB2A224J CHIP R 220K J 1 10W R243 244 RK73FB2A183J CHIP R 18K J 1 10W R250 RK73FB2A103J CHIP R 10K J 1 10W R251 252 RK73FB2A183J CHIP R 18K J 1 10W R253 RK73FB2A224J CHIP R 220K J 1 10W R254 RK73FB2A822J CHIP R 8 2K J 1 10W R255 25...

Page 35: ... 11 MT 120GK INDICATOR TUBE IC1 TA7815S IC VOLTAGE REGULATOR 15V IC2 TA79015S IC VOLTAGE REGULATOR 15V IC3 STK411 230D HYBRID IC IC3 STK411 230K HYBRID IC IC4 STK410 030D HYBRID IC IC5 NJM4580ED ANALOGUE IC IC6 TC9164AF MOS IC IC7 TC9163AF MOS IC IC8 12 NJM4565MD IC OP AMP X2 IC51 CXP82852 139Q MI COM IC IC53 S 80740AL A4 IC VOLTAGE DETECTOR Q1 2SC1845 F E TRANSISTOR Q2 2SB1640 TRANSISTOR Q3 14 2S...

Page 36: ...m 600 nm 30nm Coaxial 0 5 Vp p 75 Ω FMtunersection Tuning frequency range 87 5 MHz 108 MHz Usable sensitivity MONO 1 6 µV 75 Ω 15 2 dBf 75 kHz DEV SINAD 30 dB 50dB quieting sensitivity STEREO 31 6 µV 75 Ω 41 2 dBf Total harmonic distortion 1 kHz MONO 0 6 65 dBf input STEREO 0 7 65 dBf input Signal to noise ratio 1 kHz 75 kHz DEV MONO 75 dB 65 dBf input STEREO 68 dB 65 dBf input Stereo separation 1...

Page 37: ...ations through use of parts list Notes 1 KENWOOD follows a policy of continuous advancements in development For this reason specifications may be changed without notice 2 The full performance may not be exhibited in an extremely cold location under a water freezing temperature ForU S AandCanada AUDIOsection Rated power output during STEREO operation 100 watts per channel minimum RMS both channels ...

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