Akai GX-230 Service Manual Download

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Summary of Contents for GX-230

Page 1: ...I nUEEillAill PAHT LilS AKAI STEFIEC TAPE trIEG MG ELGlX 3cltrI ALScl APÍ LICAEILE TtrI McltrlEL GX E3cl ...

Page 2: ...I STtrREOTAPE DECI IODEL GX 23OD LSO PPLICABLE TO IODELGX 30 SECTION I SERVICE MANUAL SECTION PARTSLIST SECTION 3 SCHEMATICDIAGRA Í I 23 tl ...

Page 3: ... Í I N G 9 DJUSTillENToF FF MICRoSwITCH SW s CTUAToR PoSITION 10 DJUST ÍENT oF PLAY ilcRoswtrcH sw r nd SW il r CTIVATOR POSITION HEAD DJUST ÍENT VI IPLIFIER SYSTEM ADJUSTI IENT I PO ERSUPPLYVOLTAGE ADJUST ÍENT T P E S P E E DA D J U S T N Í E N T 3 RECORDING PLAYBAC KAMPLIFIER DJUST IENT VII D C RESISTANCE OF VARIOUS COILS VIII CLASSIFICATION OF VARIOUS P C BOARDS I P C B O A R D I N T E R C I I ...

Page 4: ...tape output volume maximum 0 5v INPUT MIC LINE DIN f ore than 0 3 mV More than 70 mV More than 3 mV RECORDING PLAYBACK LEVEL CROSSTALK ERASE RATIO RECORDING BIASFREQUENCY BTASLEAK HIGH FREQUENCY DEVIATION at 0 VU output recordingvolume maximum 0 775V 0t 1 5dB Better than 40 dB 1 000 Hz 3 VU recordi Better than 70 dB 1 000 Hz 3 VU recording 100t 10kHz Better than 30 dB Within 3 dB 8 000 Hz 3 314ipt...

Page 5: ...5 2 GX 230 only POWER SUPPLY AND POWER CONSUMPTION 100to 240VA C 50 60Hz 90WUniversal Models 240VA C 50Hz 90WBSIModels 220VA C 50Hz 90WCEEModels l20V A C 60H2 90W CSAModels 100VA C 50 60Hz 60 65WJPNModels RecorderTvoe l20W DIMENSIONS 441 W x 404 H x 210 D mm l 7 4 x 1 5 9 x 8 3 Dimensions include ail GX 230D 15 2 ks 33 4lbs cX 230 16 7 ks 36 7lbs NOTES l Specificaüonsdetermined with Scotch 2ll tap...

Page 6: ...le etc necessitating ciisassembly pieasedisassemblein the order shown rn photoeraphs Reassemble in reverseorder HEADCOVER Ft t t rftsf oII O O ffiE SCREv jS iuBBER tlOT i CONTROL KNOBS OO RONT F EL D g t l I I o NCH ROLL PI ER CAP ADJU S If NT ...

Page 7: ...T CNNECTION PLUGS ffi t l q ffi _ J i i f RE VS AfvlP BLOCK ...

Page 8: ...C N ELOCK U5E t ó LEFT REEL MOTOR POWERTRANSFORMER POWER S PPLY PC 30ARD lY 2037 s r 6 E t t 3 GFi rlf g HEAO BLOCK a RIGHT REEL MOTOR ERVO CNT RO L EC 3OARD MY 2C36 t v c i F S W 5 VAIN MO TCR EC SW P C BOARDMY 2044 sc I i5c a 4P oc S O A R Dl t 1 r 6 B 1 I tü t ñ 1t ...

Page 9: ...A and Brake Lever B are placed at a 180 angle in relation to each other If necessary adjust the angleby changrngPlay Solenoid SL l position 3 Adjust prnch wheelpressure to 1 5t0 l kgr cmby re positioningPlateA and Angie B SCREW C SCREW CAPSTAN SHAFT PINCHWHEEL 4 Then at stopmode fastenscrewsC and C so that the clearancebetween the body of Microswitch SW4 with time delay and the actuator of the mic...

Page 10: ... cm Deviation of left and right tension must be within 50 gr cm 2 Brake tension can be adjusted by changingposi tion of the SuspendedSpring If necessary change F i g 3 METAL X Confirm thot boih ore coírpl loly soporoted Fig 4 the position of the Spring SuspensionMetal or replacethe spring 3 At all modes except stop mode confirm that neither of the brake bands touch the cloth tape around the brake ...

Page 11: ...red by the arrow ma k in Fig 5 2 Fasten Reel Table Fixation Screwsto maintain optimum position at F FWD and RWD modes NOTE Tape should wind on center of reel resard lessof type reel used 4 ADJUSTMENT OF CAPSTAN MOTOR SHAFT LOOSE PLAY As shown in Fig 6 adjustthe loosepiav by inserting an adjustment washer U type to obtain a 0 3 to 0 5 mm degreeof looseplay when the capstanshaft is moved by hand ...

Page 12: ...obtain a 0 1 to 0 3 mm degree loose play when the shaft is movedbv hand NOTE Both A and B screwsmust be tiehtened after this procedure 6 HEIGHT ADJUSTMENT OF TAPE GUIDE ON TENSIONARM Adjust the height of Tape Guide on TensionArm by insertingan adjustment washer U type as shown in Fig 8 so that tape travels on the center of the tape euide ADJUSTMENT WASHER UTYPE X L ff fh gu do slighl ly Fig 8 l 0 ...

Page 13: ...oswitchoperates at the position indicatedin Fig 9 If necessary move the micro switchto obtain optimum position 8 ADJUSTMENTOF RECORDINGSLIDE SWITCH SW IO TIMING fu strown in Fig 10 adjust the switch timing by bending the slide Switch Activator Angie so that the slideswitch sliderjust comesin contactwith the back part of the slideswitch At this time the REC Push Button is fully depressed SLID E SW ...

Page 14: ...acruator and the body of the microswitch is approximately 0 3 mm or just comesin contactasshownin Fig I l SWITCHLEVER I O ADJUSTMENTOF PLAY MICROSWITCH SW 7and SW lI ACTIVATOR POSITION As shown in Fig 12 at stop mode move the microswitch activatorson Play Slide Plate so that the clearancebetween the activator and the porches of the microswitchesis approximately 1 0 mm T2 ...

Page 15: ...sure that theseadjustments areproperiy carriedout 2 Be careful not to usea magnetized screwdriveror other magnetizedtools in the vicinity of the heads 3 Use only new tape as level variation is likely to occurwhen usingold tape 4 Demagnetize heads with a Head Demagnetizer beforeand afterheadadjusrment COMB REC ERASE FWD PLAYBACK HEAD RE4 6 HEAD P4 2O2 1 3 ...

Page 16: ...t Adiustment 8 000Hz 3 3 4 ips testtape Adjust headgapsurfaceso that there is no changein output levelwhen tension is appliedto the suopiyreelside REV PlrvbackHead AzrmuthAlignment djustment 8 000Hz 3 3 4ips test taDe Ilaximum output both channels REV PlavbackHead GapAlignment Adjustment I 8 000Hz 3 314 ips testtape REV K Adjust headgapsurtaceso that there is no changein output levelwhen tension i...

Page 17: ... CJUST TO 24V Fig 14 TestTape 1 000 Hz 7 Il2 ips testtape i9 cm s c I l 9 5 c m s c Fis l5 I i Rema ks I 3 e Result 24 0V Terminal Po t Supply P C Boa d Tape Speed7 ll2 ips Mode STOP FWD P B Adjustment Item PowerSupply Voltase Adiustment 7 ll2 ips Tape Speed Adjustment t r fi 3 3 4ips TapeSpeed Adjustment i 000Hz 7 ll2ips testtape FWD I p I VR2 30 kB 500 Hz xlj Tape Speed3 3 4 ips r5 ...

Page 18: ...Sensitivity I 700 Hz 7 l12 i FWD RecordingLevel Adiustment Frequency Response Adjustment Scotch 21I tape 1 000 Hz O rU recording Scotch 21I tape 1 000 Hz 10 000 Hz 20 dBmrecordins vR2 20kB c25 80P I t t 2 3 m H 0 t l 5 d B 0 77sv 1 000Hz to 10 000 Hz flat Lessthan 30w REC Monitor Switch at SOURCE Readjust recording level following biasadjustment With Monitor Switch at TAPE and SOURCEPositions Bias...

Page 19: ...o h m Between4 6 0 7ohm Between7 9 ffi 168ohm Combination Rec Erase Head RE4ó Rec 5 5ohm Erase1 8ohm NOTE Resistancevaluesshown in this chart are averasevalues VIII CLASSIFICATION OF VARIOUS P C BOARDS I P C BOARD TNTERCHANGEABILITY CHART P C Board GX 230D GX 230 RelayP C Board MY 008 MY 008 ServoControl P C Board MY 2036 MY 2036 Power SuppiyP C Board MY 2037 MY 2037 REC SW P C Board MY 204 MY 204...

Page 20: ...I qf t llfl lff11 9k d q 3 ü i9 i i s S r t a b s Ss Elj tElE n ñEK ie i ffi gKñl ry iffi r3 ffi p E qti éuÉl l l t Fxql a a I O a a a r r a a r t t f I lt f I l Q ff r f l t lc sl r e lffii g t 1 f r ai ffi l Lifi ffifi Fffi a _ g 3 l r É fi i F t i i tht5 5 f g l lN i ó l t Í t s s t tffifu iii llr Nf ftq fntq i It rll r t r isli ffidt 11 t r riirffffffi l 8 ...

Page 21: ...l Plavback mp P C Board MY 5017 f 7 I Y ó i q ÉfiF iE b i cl 4 I I I rl l I t I r i i l l I o r t t do G t Er Sfnffil I 7 1 I L G d C á á r r É l t i lf ii f3 ar á t i r I q i l Tpt f 3l s i i 19 ...

Page 22: ... I z a ó a Ét D o x O AKAg b 33i7ie t ó 6 r o r o o l P o ñ o i 9 ffi f F t F C F r ü o f 6 a e l É i i u l i I i ñ é c T c D C N C o t m I z I O x c x t i l l l l l l r r t l g 3 o t z o a l o O D m D o r N c l k A O o s l l I m n n C 8 q É o r c z a ROM MATEi l l l l x l l r l l d l l t l l l i l t i 9 l l ü t F l l i l r l l l i 1 1 ñ I a t S f r N LOC KJ9 REC Ai P lND I o atffi S sTT tNC 2 20 ...

Page 23: ...RVO CONTROL Pc BoARD MY 2o36 ro rRANsrsToR lRr coLLECfoR FROMTRANSISTOR fRI EMITTER 7 REC SW P C Board MY 1044 FROMPO VER SUPPLY lPc soaRDMY 2037 rol rall4 a 7 TO TRANSISTOR TRI BASE FROM POtfER SUPPLY PC 80AR0 MY 2037 t 9 FROM POWER IRA ISFORi ER o r ñffcto z l I 2 csr t l É 1 z F Z n ñ z J z n I F o U o F Fd P ñ O o F F 3 3 E l J i n z i F o o ú ñ F c I v r d R t o z 693É o H F a F z 3f l o a o ...

Page 24: ...r t o B OUTPUT 6Rcl no OUTPUT ltlPUT o G ro tsS sR U I 8 P E o e s UJ L L s h o gx O Y lr ü Y t L ll ll l l Q l l l l t I H stl l l F i nF r l l l 9 E F a T J l J at L l J l l lrJ l l FROM FOWARD P8 HEAD R CII TO ML TIPLIJG P8 FROM REVERSEPB HEAD R CH l rtnn il tl il tl 5 3 F eñ óro Pg 41 üi o JG J 9r 1 1 ...

Page 25: ...NSIONARM DIRJCTIONSw BLOCK Frg 8 MECH ASSEMBLYBLOCK Frg 9 POWERSLJPPLY BLOCK Fig l0 REC OSC P C BOARD MY 5016 BLOCK Frg 1l PB P c BOARD MY 5017 BITOCK Fig 12 SERVOP C BOARD MY s036 BIJOCK Fis 13 EQ P c BOARD MY s014 BLocK Fig 14 POWERSLJPPLY P c BOARD MY 2037 BLOCK Fig 15 MAIN AMP M95024 BLOCK Fig 16 AMP ASSEMBLYBITOCK Fig 17 FINAL ASSEMBLYBLOCK INDEX 24 25 26 27 29 30 30 3 l 33 35 36 37 38 38 39 ...

Page 26: ...FIG 1 HEAD BLOCK _WhenorderingpaÍs pleasedescribePartsNumber SerialNumber andModelNumberindetail 24 ...

Page 27: ...l P C Board A 1 25 ZS2Ol508 Screw pan head 2x4 t 26 HA532743 CH Angle A I 77 HR55ó582 REC ERASE HEAD RE4 6 t n l f e tv v Y l nY 0001 t MY 0002 I MY 0003 2 I 5 TD0003 2 TW 00062 890018 2 4 ri 00l7 2 4 TW 0008 I 9 BS ml8 6 TW 00102 RD55 3 MY 0006 I It Y 0006 I MY 00102 6 3 2 RDA36 4 4 TW 0009 I I PartsNo 2 t B M 3 l 4 7 4 l 2 2 x 8 R 3 9 8 4 3 0 2 3x 8R398441 2 4 MT488l4 2 S MT255420 2 6 MS342000 2...

Page 28: ...97633 3 6 BZó00300 3 1 MV3ó88Eó 3 8 M2597666 3 9 M2591644 3 lo M2597690 3 l I MS59 65 5 3 12 254r3234 3 13 2W603786 3 l4x ZtN6O3191 3 l5x 2W603764 3 I 6x ZW óO3 5 3 1 7 M Z 6 2 S S 7 1 Steel Ball D3 Motor Shield Plate Thrust Angle Ball Holder Thrust Holding Prop Screw pan head 4xl2 Adjust Washer U u 7026 KJ 7021 KJ 7029 U 70 J I I I I 2 4 D4xl3x0 2t 2 Adjust Washer U D 4 xl 3 x o 5 t 2 Adjust Wash...

Page 29: ...FIG 4a OPERATION BLOCK N N o o o a f 27 ...

Page 30: ... MZ6268SO Button Bracket 4 3 MZ 62S6 2 Loc k Plate 44 2G568934 Lock Spring 4 5 MS62560l Lever Guide w pin C 4 6 M2625678 Slider Plate A 4 7 MZó25ó80 Slider Plate B 4 8 Zr I21OlOl E Ring 3M 4 9 ZG62S33I Wind Spring 4 lO MSó2 562 3 Bu tton Shaft 4 l I MLó 25 645 Re c ord Lever 4 12 ML62 5634 Operat Lever 4 I 3 M2625656 Shaft Angle 4 14 25422076 Screw pan head 3x5 4 15 2G625667 Operat Lever Spring 4 ...

Page 31: ...27O 34 E Ring 5M 6 l 9 5 18 MZ62S4S4 Pinch Roller Plate B MY 1035 5 19 2W334ó53 E Ring M 6 1 5 20 2G625465 Pinch Roller Spring My ttso QUICKSW BLOCK 8 5622620 Quick SW Block Comp EZ62SlEl Quick SW Table w ProP 8S562465 Micro SW K 1 25483502 Screw pan head 3xl3 M H 5 2 8 5 1 3 S W P i n MH 527635 SW Pipe Ztr273756 Nut M3 ZGS292Ir SW Spring 2W259738 Washer PolYslider D 4 l x x O 25 t mI2lOlO I E Rin...

Page 32: ... Pr op M2596823 Thrust Plate Z NS932l2 Washer DExlt 25421806 Screw pan head 3x8 I 3 MY tofl 3 KJ tm I I 3 I I I 2 I I I a I 2 KJ m I KJ m35 l I 6 l 9 I MY vY nn Y m2 MY 2032 A t ü MY l ñn MR U5 MC P13 MY A 2t MY AA MR 7 A5 ll2l TD2019 TV nn sw TENSION ARM DIRECTION SW BLOCK S fl PartsNo Description N o TENSIONARM BLOCK 7 lx 82622618 Tension A m Block Comp 1 2 MZó25803 Tension Arm Table w metal 7 3...

Page 33: ...FIG 8 MECH ASSEMB O O r r a l l r l ii r l l 1 r i I 3 l ...

Page 34: ...8 tY 1010 ED2l9 l l 60 vY l0ll vY 1012 Y 1013 vY 1020 MY t0l MY 10t5 MY t0t6 MY 1017 MY 10t9 MY 1021 RDz t cc llt9 tY 102 8 45 ZW58O I 73 Guide Washer Tll055 846 2W420682 Washer Nylon D4 2x9x0 5t 847 ZG535lO5 Tension Arm Spring T 207E 848x M 23 14673 Reel Motor Shield MR 123 849 f L625353 Shifter Lever wlpin 2 yY 1025 8 50 M2625364 Connecting Plate VY 1026 8 51 ZG62S37S Play Spring uy t0 7 8 52x Z...

Page 35: ...FIG 9 POWERSUPPLYBLOCK q ts Á n s 33 ...

Page 36: ...Y m56 P C Board Holder A P C Board Holder B P C Board Holder C t Q vY 20 0 I vY 2 l t MY m12 I Power Chassis MY 20R Power Trans MYT I 38 3t Power Trans MYT lA 230 18 315 Power Trans MYT l I JPN CSA 3E 3r6 Power Trans MYT 12 CEE J8 3lz Trans Shield Plate My 20S3 Screw pan head 4x l0 Trans Reinforcement Plate B LF S2 Nut M4 Elect 330 F lóOWV Lug TYPe 24 ltrsf Carbon R RD l 4 220k J Insu Type P C 3 5...

Page 37: ...I El ect t0 F lóWV lO Cl2 8C22O678 Elect 4 PF 2swl 1O Cr3 EC329111 Elect 4 gF ó 3WV lO C14 EC399s6s vFM 22PF J 5OWV lo cls EC29O52O VFM I0OPF J 5OW1 lO C16 EC379 1O Mvlar 0 1 F J SOWV lO Cl EC32OO5l Elect lO F l6WV lO Cl8 8C32911r Elect 4 PF 6 3WV lo Cl9 EC389496 Mvlar 0 068t F J soWv lO C2O EC22OlSl Elect lOO rF 2sWV lO C 2l EC320O5l Elect l0 F lóWV lO C22 F C22O994 Elect 10PF 25WV lO C 23 EC 405...

Page 38: ...tion PB P C Board Comp MY so I 230D PB P C Boa d Comp MY so I 7 2 30 Transistor 2SC45 8LG C Transistor 2SC94s pXe Zener Diode WZ O7S Germanium Diode lN34A Inductor óO7OGE 23 MH J Headphone Trans N l6 5355 Semi fixed Vol V8K4 l S0 kB 2 axial 2 throw Vol 50 kAx2 Friction Type Semi fixed Vol V8K4 l 2kB C pacitor Vertical Type Elect 4 F 2sWV Elect lO F l6WV NL vFM looPF J sowv VFM 68PF J sOWV vru looP...

Page 39: ... 027pF K sOwv I Mylar O Oo33pF K sOWV I Elect 3 3sF 25WV I Mylar O O2 F K 50WV I l fylar O OO33 F K SOWV I Mylar O OI2 F J 5OWV I Solid Aluminum 3 3 F 2sWV I Elect l rF 25WV I Elect lO F l6WV I Elect IOO rF 25WV I Mylar O OlpF K 50WV I Elect 47 F SOWV I l 2 T R l 2 E T 4 8 0 0 1 l2 TR3 4 ET399846 t 2 TR5 ET538I s4 l2 TR6 ET39984ó l2 TR7 ETó2386 l2 TRE ET47800I l2 THI ED59335 7 l2 DI EDss 447 l2 D2...

Page 40: ...l4 TR3to7 ET478OOl Transistor2SC9459 PXQ l4 Dlto4 ED224550 Silicon Diode lOD4 l4 D5to8 ED494583 Silicon Diode rODOS l4 D9 ED5óO913 SiliconDiode rS2473 VE l4 DlO ED357194 ZenerDiode RD SA M l4 D I ltol ED5609r3 SiliconDiode t524 3 VE l4 Rlto4 ER37ó435 SparkQuencherU L O l 299 3oo Bz 2sowv l4 RLl EPfS z Ct Relay MY44 US DC24v l4 VRl 8V5546 O Semi frxed Vol VIOKE l s lKB l4 2 E 2626894 Heat sink Plat...

Page 41: ...I5 MAIN AMP MS 5024 BLOCK FIG 16 AMP ASSEMBLYBLOCK ñr o l t 1 É P e 39 ...

Page 42: ...3 1644 1 6 4 5 r646 t647 r 6 4 8 1 6 4 9 x l6 5Ox 1 I 8 2 4 I I I I l 3 2 I 2 I I 6 I I 2 I 2 I l 5 8 x l5 FóOl EF460ós3 l 5 c60I EC3374E l 5 có02 Ec33l o5 l5 c603 EC220618 l s c604 8c372148 15 C 6 0 s E C 2 5 l 2 9 l r s có06 EC220678 i 5 cóo EC324s38 l s cóo8 EC3s0ó84 l s c ó l o E c 3 0 8 lI MAIN AMP P C BOARDBLOCK BA42ó183 Main Arnp P C Board Comp 2 3 0 FuseST I lA Capacitor Vertical Type Hi Q...

Page 43: ...O Screw pan head4x3O Parts No Description FINAL ASSEMBLY BLOCK l7 26x 5262 085 Side Plate A Right l1 21x 52627096 Side Plate B Left l7 28x 25325495 Tapping Screw s2 3x6 l1 29x 52627298 Panel Support B l7 3Ox 3Z6273l I PanelSuppor t C l7 3 lx SA428714 LM Rubber Foot w screw l7 32x 2W324281 Screw pan head 4x25 t7 33 256f390l Panel Screw 11 34 E2436211 Collar For Jack l7 35x E2627355 Meter Cushion l7...

Page 44: ... 4 2 O 2 s MT25 s420 2 s MT291663 2 E l M T 3 l 4 9 8 2 2 s tvtt taSAz 8 19 I iMT3l 7485 2 t1 MT391225 2 10 M T 4 0 s 2 6 8 2 r 3 MT436860 2 r6 MT488147 2 4 MT495606 2 rl M T 4 9 5 6 1 7 2 t 2 x MV53786 6 26 M V 3 ó 8 8 8 6 3 7 MV597082 6 4 MZ259233 9 62x M 2 3 1 4 6 0 5 8 2 4 M2314613 8 48x iMz3t4998 2 26 l M 2 3 l 4 9 9 8 8 2 0 1 M Z 3 l s 0 0 0 2 2 7 j M 2 3 l 5 0 O O 8 2 1 M23t6822 1 r6 MZ39 0...

Page 45: ... zs32s49s 1648 25325495 l7 28x 2s344463 8 57 2 s 3 5 5 5 2 2 t 6 4 4 2 s 3 6 9 9 0 0 1 3 l 2S37935O 9 4Ox z s 3 9 3 5 0 l 4 5 zs3 93s0 l6 32x zs392t4r r t 22x 2s403222 2 22 zs4l 320I l 6 ZS4l32OI 8 3x ZS4l32OI 9 ó5x 2s4r3234 i 12 2s404044 l 5 zs4 l4 I 8 9 6Ex zs4r12r 6 i 24 z s 4 t 1 2 t 6 8 2 2 zs42I 806 6 Jr zs42I 806 8 34 zs42l 80ó e 35 z s 4 2 l 8 0 ó 1 2 2 2 s 4 2 1 8 0 6 l 4 3 2s422016 l 3ó ...

Page 46: ...SECTION3 SGHEMATIC trIIAGFTAM l GX 230 D SCHEMATIC DTAGRAM 2 GX 23OD SCHEMATIC DT AGRAM 3 GX 230 SCHEMATIC DI AGRAM 4 ...

Page 47: ... x hx s ó ó8 I 3 r o 9s l i i r J __ i f f r l t Í l_ r I I I ...

Page 48: ...É u F J ir E t oee ñ o u I 19 É oJ r t F xo e u a 3 F 4 r rr É u F A J o E 9 t i l o j o í i o É v F o r o D o ü r o 9 ñ F I z 8 o r trl n o 1 d _ ñ O e o O u g e r 6Cte td o o rO 9 vroz Atl 0 u v o 8 3 i J s 3 3 u 0 u t z o uJ o a i 0 6 9iq U 0 Ea O ñ d w vgoU r C I O N t N r o o i J i 7 q o N o z o o f C T Q o o o 9 o q É ...

Page 49: ... qo 98 Hó8 33 aó Hñ9 X 94 U G o D c J t o O O J t_ 8 o E t J n l t o i C 2 2 o É q f r 1 á 4 Y r 3 E 6 d o z l E o á E ó 5 _ I f z O I á f c o N rvq t E l a i Dl fO AJ I X ...

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