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1、SERVICE WTALSTEREO AMPLIFIER$tful u-400RadioFans.CN 收音机爱 好者资料库Gau-4400This service manual is designed for service engineers to repair, adjust,maintain and order the replacement parts of the AU-4400 correctly.When ordering the parts, use the stock number and parts name speci-fically referring to the
2、Parts Locations & Parts Lists.For general usage and maintenance of the unit, please refer to theOperating lnstructions attached with the unit.TABLE OF CONTENTSSection Title Page- r. pecrncnnotts . . 22. BLOCK DIAGRAM AND VALUE OF EACH LEVEL . 33. ADJUSTMENT ,.,. 44. TROUBLESHOOTINGCHART . 44-1. Trou
3、bleshooting on PowerSupplySection. . 44-2. TroubleshootingonAudioSection . . 45. PARTS LOCATIONS AND PARTS LISTS . 55-1. F-2400A Equalizer,Tone Control Circuit Board. . 55-2. t-24O2 Main & Power Supply Circuit Board . . . 55-3. F-2406 Selector Switch Circuit Board . . . . . 65-4. F-240TVolumeCircuit
4、Board. .65-5. F-240SAAccessoryCircuitBoard. .65-6. Other Parts (Front Side) 75-7. OtherParts(TopSide) . 86. SCHEMATIC DIAGRAM . 97. PAGKINGLIST . 108. AGCESSORY PARTS LIST . . 10vYvVRadioFans.CN 收音机爱 好者资料库,1. SPECIFICATIONScoNr *: :Y: :i,Y.lr channe t x Z(both channels driven)LOAD IMPEDANCE . . . .
5、. .BOPOWER BAND . . . . . . . . . .40 to 20,000H2TOTALiT: :HI?il N O 3%(from AUX inputs)Music power (lHF) .96W (4o f ,000Hz)continuousRMspoweroutput.rz;Zfi ,t?llo,aI NTERMODULATION DISTORTI ON(at rated power output, 70H z: TkHz- 4 :1 SMPTEmethod)OVERALL (from AUX) . .less than 0.5%FREQUENCY RESPONSE
6、 (at 1 Watt power output)OVERALL (from AUX) .20 to 30,000H2 lldg(30H2-15kHz +1dB)DAMPING FACTOR .50 (BO)CHANNEL SEPARATION (1kHz at rated power output)PHONO . . .better than 45dBTUNER, AUX, TAPE . . . . better than 45dBIHF HUM AND NOISEPHONO . . .better than 70dBMIC . o.better than TOBTUNER, AUX, TA
7、PE . . . . better than B5dBINPUT SENSITIVITY AND IMPEDANCE (1kHz for ratedpower output)PHONO . o. .2.5mV 50kO(Max. input capability: l00mV al 0.2% distortion)MIC . .2.5mV 10kOTUNER, AUX . o.150mV 50kOTAPE RLAY (Pin jack) . .150mV 50kOTAPE REC/PLAY (DlN socket). . . . o. . . .150mV 50kORECORDING OUTP
8、UTTAPE REC (Pin jack) . . . .150mVTAPE REC/PLAY (DlN socket) . .30mVSWITCHES AND CONTROLSBASS . . . . . . . . . . . . . . o . . . + 12d8, -12d8 (50H2)TREBLE . +12d8, -12d8 (15kHz)L o u *: l: 1 T : :1l*,1,r+ BdB (10kHz)LOW FILTER . . . . . . . . . . -3dB (100H2, 6dB/oct.)HICH FILTER . -3dB (7kz,6dB/o
9、ct.)U,OTHERSSEMICONDUCTORSTRANSISTOR . . . o .17DIODES . .lCS. o . . . . o. .4LED . . . o. .lPOWER REQUIREMENTSVoLTAGE . . . . . . . . . . . . 10, 117, 220, 24cV 50/60H2CONSUMPTION .56V (rated), 156W (max.)DIMENSIONS . . . . . . . . . . . .400mm (15%o)W120m m (4%) H240mm (9%o) DWEICHT . q.6.3Kg (13.
10、9 lbs) net7.6K9 (16.8 !bs) packed* Design and speciflcation subiect to change without notice forimprovements.-Lr2Gau-44002. BLOCK DIAGRAM AND VALUE OF EACH LEVELEQUALTZERcrRcuTF-24pConditions of Level Measuring*Value of each level in block diagram was measuredby the followings.1. MASTER VOLUME . .Ma
11、ximum2. BASS, TREBLE, BALANCE volume . .Center3. lnput . PHONO 2.5mV lkHz Sine WaveAUX 150mV lkHz Sine Wave(output impedance of 600O at anaud io oscillator)3r:,;ilcJrcIS0l (o-t): SELECTORl. MIC S0l (od)2. PHONO S0l (e,h)3. TUNER sot (i-i)4. AUx sot (r, t)ACCESSORYCIRCUITtT-2-4ogl2Is02-bsor (m, n), T
12、APE MoNtroRI. SOURCE2. PLAYBACKS0Z (o, b) LOUDNESSI. OUT2. lNVOLUMECIRCUITfF:Tn114. Output . . .14.5V(26W)BONote: Each voltage value is for reference and measuredby a VTVM. ln some recerders, the actual voltagevalue is in minor difference from the referenceval ue.Output. .Each channel driven BOat l,
13、000kHzACCESSORYCIRCUITTONE COTTROL CIRCUIT7r-2ffi-lVRO5TREBLEVRS03 (o, b), H IGH F I LTERI. OUT2. lNS04 (o, b), LOW FILTERI. OUT2. lNr_ u_iTOE EONTROLCIRCUITaF-7trnS05 (o,e) POWER SPEAKERSI. POWER OFF2.43. SPEAKER OFF4.85. A+BS0: MODEI. STEREO2. MONOvvVvAUXrRECtrpELpr-nvVRO6TREBLEmIAIN & FOTER CIRCU
14、IT3. ADJUSTMENT3-. Bias Current AdiustmentNote: 1. Master Volume . .Minimum2. Speaker Selector .SYSTEM(A)3. Make the 5P terminals ree (no load).4. Conirm the AC power supply voltage.5. After adjustment, run the unit for more than 3 minutes then check and readjust necessary.6. Room temperature should
15、 be 18-28 (65-83F) or bias current adlustment.* Before adjustment of bias current, set VR03 and VR04 as follows. (Fig. 3-1)1) Turn VR03 (L-ch) fully counterclockwise. (The bias current is minimum)2) Turn VROa (R-ch) fully clockwise. (The bias current is minimum)Fig. 3-1MN6vR03milliam-meterQmilliam-m
16、eterF-2402STEP I,suBf ECTI ,orrPMENrI MEASURE OUTPUT IAD,USTi nolusr roR1l2lBias currentL-chBias currentR-chDC milliam-meterSame as abovet-2402 F01 (Fig. 3-1)t-2402 F02 (Fig. 3-1)F-2402 VR03(Fis. 3-1)t-2402 VR04(Fig.3-1)20mA+ 1mA20mA + 1mACONDITIONSteq. down meters range ac-coro r nSryoChange leads
17、porarity if meterswings backwardGau-4400I5.C=5. PARTS LOGATIONS AND PARTS LISTS5-1. -24004 Equalizer, Tone COntfol Cifcuit Board (srock No.7s60060 complete circuit Board i-24oo)Conductor Side Parts ListPositionParts No. Stock No.DescriptionB. AC. DBA3il(E,f) .l tcBA3r IG)(E, F)JlCor, oz 030171,2lCos
18、, o+ 030181 , 2Cor, oz 0519102Cog, o+ 0660470Cos, o6 060101Coz, o8 051 I 330Cos, r o 0600227Cr l, rz 0600626Cr3, ra 0513100Crs, ra 0519104Crz, rB 0515339Ctg,zo 05l0l0lCzt , zz 066047 0Cz3, z+ 051 3 I 00Czs, z6 051 5 09Czt , zs 0601227Czp, so 0601228Csr,3z 0601476Css, 3a 0601477C+r 0515109Coor 001 87
19、Cdoz 0660221Coog 0515221Cao+ 051 5l 0lCeos 051 5l 0lCeoo 051 51 0lCpor 0601 00Cgoz 0601 00Rot, oz 0107222Ros, o+ 0107104Ros, o 0l 071 04Roz, o8 0107 684Ros, ro 0107154Rr r, lz 0107123Rr3, r+ 0107 473Rrs, ro 0107221Rrz, rB 0107222R r e, zo 0107 684Rzt, 2z 0107104Rz3, zt 0107822Rzs, z6 0107102R27 , zB
20、 0l 07153Rzp, so 0107152R3r,3z 0107222Rlr, tz 0l 071 04R+s 0l 07105Reor 0107123Rooz 0107.l 53Rooe 0l 031 02Reo+ 0103471Roos 0107221Rooe 01031 02Rooz 0182392Rpor 0107471VRos, o+ 10.l5080, IVRos, oo 1015080, IVRoz, oa 1015070, ISot(o-n) I 13080BAAAAAAADDDDD3.31tt 50V E.C. A .+znr) 5ov c.c. B lOOpFJ B.
21、33 ytt I 0V E.C. B .oo221rl sov M.c. B 0.0062pF) B .10 1tF 25V E.C. B .l:ii|sov Ec 3:| 00 1tt .3V E.C. C .47 pt 50V C.C. C .tA pF 25V E.C. C .1 pt 50V E.C. C .0.022 pt ) o0.22 rtF I oo.oo47 1tr f sov MC D0.047 1-tF ,| c1 ltF 50V E.C. A0.08prF 50V M.C. A220pt 50V C.C. A220 ytF ) gl:i:Iu,u Ec :1OO 1tt
22、 ,| cI 0oF)r opri sov cc2.2ko ) a .l00ko I B.t00ko I B.680kO I B .rsokC I B.r2ko I a.47ka I a22oo I n2.2ko I c.:13 l* cR 3:8.2ko I c.rko I otsko I or.sk0 I o22ko I clooko I AlMo I nt2ko I alsko ) 7;i3) %w cR :220o. tLW C.R. CI ko %w c.R. B3.9ko 2WC.R. B47oQ %W C.R.rooko(n)xz I Dooko(A)x2 (vorioble-
23、Dr ooko (MN) x2 I Resistor ZSUB54 Push Switch A,AAAAAADDDDIIII(I(5pe1mmkS-2. F-2402 Main & Power Supply Circuit Board (stock No.7s7osil complete circuit Board r-2o2)Conductor Side2SA-6972SA-7282SC-121 12SC-711Br,-2s,C-1444$-2+Parts ListParts No. Stock No.DescriptionPositionDescriptionPositionParts N
24、o. Stock No.TRor, ozTRoo, onTRos, ooTRoz, oaTRos, toTRt t, tzTRts, t+TRrs, toTRoor0300470, I0300470, I030593103057310305930, I030031 0, I03061 01,2030101,203059312SA726W (r,C)2SA726W (r, O)2SC I 21 lD2SC7I I E2SCl2l (C, D)23 A697 (C, D)2SCl 444 (O, Y)2SC 1 444 (O, Y)2SCI 2I I DDiode2C.242C.242C.24I
25、C.I AI C.I AI C.I AIBI C.I A2B1,28IB2BIB2C.242C.2A2C.242C.2A2C.2A28,C.2A,B2C.2AIC.IAI C.I A1,2.8, 2 A2C.2A2B2B2B2B2BRol,oz 0lA7474Ro3, o+ 0107222Ros, o 0107223Roz, o8 010753Roe, to 0107473Rr r, lz 0107222Rr3, t+ 0107123Rrs, t6 0107123Rlz, 18 0107821Rrp, zo 010753Rzt , z2 0l 071 82R23,2+ 0107472Rzs,
26、z6 0107222Rzt , z8 0l 07821Rzp,30 0l 07390R3t,3z 0107221R33,34 0107100Rss, 3 0107221R3z, s8 0l 071 00Rse, +o 01 07 I 00R+r, +2 0122338R+3, +4 0122338R+s,4 0103479R+2, +8 0107823Rae, so 010447 1Root 0l07l0lReos 0210.l53VRos, oa 1035070For, oz 043370l,4w c.R.2C.242C.242C.242C.242C.242C.242c.242B .282C
27、.242C.242C .281,28.1,28IB.IBI B,C.I A,BI B,C.I A,BIC. Ar c. AI C. AI C. AIC. AIC. AI C. AIC. A2C.242C.242B2BTronsistor470k0 2.2ko I22ka I5ko I47k0 I2.2ka I1.2k0 Il2kC) I8200 I5kC) tt.8ko I4.7k o I2.2ko I820C) I3eo I22oa I1oCI I22oa IloC) ItoC) J0.33 C) lo.33Ol4.7 Q82k o470o1000I 5koDoot 0310350Doog
28、0310350Doos 0310350Dooz 03.l0350Cot, oz 0519103Cog, o+ 05l5l0lCos, 06 00331Coz, o8 0515470Cop, to 060509Cr r, l2 0515330Ct3, t4 0660220Crs, t 0660221Crz, tB 0601477Ctg , zo 0549107Czt , zz 051 5l 00Coor 0519902Cooa 0659010Ceos 0519903Cdot 0549205Coog 05901I;l:rl sov E c330pF 50V C.C.47 1tF 50V E.C.5
29、pF 50V C.C.33 1tF 50V E.C.,i:rii sov c c0.0a7 pF 50V M.C.3:) 5ov E c47 1tt 80V E.C.0.00a7 pF 500V C.C.l00ptE 80V E.C.2200 pt 63V E.C.0.01 ptF 500V C.C.2W Ce. R.%w c.R.%w c.R.I W C.R.%w c.R.yzW C.R.I 0D-2 Ir oD-2 Ll oD-2 (I oD-2 ,|I k O B Bios Current Volume I B,C.l A,B2.5A Quick Acting Fuse I B. I B
30、Heot Sinker59370805-3. F-2406 Selector SwitchConductor SideCircuitBoard5-5. F-24084 Accessory(Stock No. 7592200 CompleteConductor SideCircuit BoarbCircuit Board f-240S)5-4. F-2407 Volume Circuit BoardConductor SideParts ListIIParts No. Stock No.DescriptionRor, oz 0107103Sor 0l 3080Cpos 0657 473loko
31、y4w c.R.Push Switch (Selector)0.047 pF 50V C.C.Parts ListParts ListParts No. Stock No.DescriptionParts No. Stock No.DescriptionPositionI,ICorCozRotRozVRorVRoz0621561 50oF)0621 s61 560prl 50V0r07r53 r5k0)o l 07 t 53 I skol /nN10il0r0, I 250ko(B)x2)l 0r r or 0, I 250ko (B) x2 JCor, oz 001 1 57Cos, oa
32、0601227Cos, oo 0601477Rot, oz UA7223Ro3, oa 01 071 04Roz, 08 0107 47 4Rop, ro 0107222Soz(o,b) I 170340Sos(o,b) I 170350So+(o,b) 117 0340sOV M.C.%w c.R.Lever Switch0.01 spF lo.zzpr Io.o+t 1tF Izzt?=r,., ,lt,- r.s-,- . res;-$ : = = = fi=-# *(#SSs88. $ *i.rdA* L . ;-i.S1ag-I(,|9DIac,sqNalq, olIN=Ac,YAE
33、(1,tslr,.tts_-t1llilrl(/,_t-1 tlle tsl+N =l-ffil81 I +llBr1_l :l+ll: orll# cr-luoilc) -lt: Al9le1-llCoslooP IHl_-ll9o 3+Set-fl|,I lwhllllrrNlullCeasg) lrooysot4*,*(Ig., -N- CeuSos-aNO*_u-)ocPt,IG7. PACKING LISTParts No. Stock No.DescriptionI239027800 Stylofoom Pocking9008151 Corton Cose9116640 Vinyl
34、 Covert,8. ACCESSORYPARTS LISTStock No.Description0433670 2.5A Quick Acting Fuse92083t 0 Operoting tnstructions9228310 Operoting lnstruction Sheet/tovV,v.vSANSUI ELECTRIC CO., LTD.14-1,2-chome, lzumi, Suginamiku, Tokyo 168, JapanTELEPHONE: (03) 323-111I /TELEX: 232-2076SMO29Printed in Jopon (N+ZSON4)
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