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NAD 705, Service Manual

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NAD 705 Service Manual Download Page 41

Summary of Contents for 705

Page 1: ...Q 2 W NAD O m r tft W U LLI W cc 705 RECEIVER ...

Page 2: ...iagram 13 14 Adjustment Procedure 15 16 Main Schematic Diagram 17 18 Main PCB Layout 19 20 Tuner Schematic Diagram 21 22 Tuner Front PCB Layout 23 24 Front Schematic Diagram 25 26 IC Block Diagram 27 28 Wiring Diagram A 29 30 Wiring Diagram B 31 32 Exploded View 33 34 Exploded View Parts List 35 47 Electrical Parts List 48 Troubleshooting Guide 49 Packing Diagram 50 Packing List 51 Notes ...

Page 3: ...O REMOVE TOP COVER Service Instructions 1 Remove 4 screws A from the left and right sides of the top cover See figure 2 Remove S screws B from the rear panel See figure II 3 Top cover can now be removed ...

Page 4: ...nput 75 kHz DEV 80dB MPX Separation At 1 kHz 50dB MPX S N Ratio 1mV 77dB FM Stop Sensitivity At 98 MHz 30dB PRE AMPLIFIER SECTION Sensitivity At 1 kHz Output lV 180mV Frequency Response OdB Loudness Control 20 Hz 12dB Volume 30dB 20 kHz 4dB Base 1 Boost 50 Hz 9 5dB Cut 50 Hz 9 5dB Boost 10 kHz 7 OdB Midrange Cut 10 kHz 7 OdB POWER AMPLIFIER SECTION Rated T H D O O1Z Channel Separation At 10 kHz 70...

Page 5: ...tude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance servicing Instructions in the literature accompanying the appliance REAR PANEL CONNECTIONS 1 AM ANTENNA TERMINALS 9 TAPE 2 IN OUT 2 FM ANTENNA INPUT 10 MULTI ROOM OUTPUT 3 PHONO GROUND 11 PREAMP OUT MAIN IN ...

Page 6: ...AM FM SELECT 2 PHONES 9 STORE PRESET 3 A B SPEAKER SELECTOR 10 TUNING MODE 4 BASS 11 LISTEN CHOOSE INPUT FOR LISTENING 5 TREBLE 12 RECORD CHOOSE INPUT FOR RECORDING 6 BALANCE 13 MONO 7 UP DOWN TUNING 14 LOUDNESS COMPENSATION 15 VOLUME 16 DISPLAY ...

Page 7: ...e or disengage the B speakers 4 Mute Press to shut off the sound temporarily when you want to answerthe telephone for example A little sound may still be audible Press MUTE again to rec nre the sound to its previous volume level 5 Preset Up Down Skips to the ne higher or lower numbered preset station 6 Search Up Down Auto seek tuning scans up or down in frequency and stops at the next strong stati...

Page 8: ...TC404 T T406 me T407 Fo 1 TP3 O TUNER ADJUSTMENT POINTS T408 T409 T403 10 Wl T402 SFR402 p FL 40S O TP2 0 O O TP1 VT GNO OTP4 T404 OTP5 T401 Figure 1 D 077 TP8 TUNING O L402 IC403 TC405 SF R403 E ...

Page 9: ... Adjust SFR103 let the At open load DC meter Adjust SFR104 let the MAIN ADJUSTMENT POINTS Figure 2 to speaker terminal A 0 25mV L channel Fig 2 0 25mV R channel Fig 2 2 Quiesent Current Adjustment a Allow at least 3 minutes burn in before performing this adjustment connected to CN 15 base Fig 2 reading as 4 4mV I 20mA 5mA L channel Fig 11 connected to CN 14 base Fig 2 reading as 4 4mV I 20mA 5mA L...

Page 10: ...M Figure 3 AM STANDARD SIGNAL GEN SCOPE TAPE 1 OUT 2 0 00 0 0 00 SET P FM STANDARD SIGNAL GEN 100 7M 0000 DC METER OC METER T 00o 00 0 0 0 0 TAPE 2 OUT n SET AM ANT IN FM ANT IN FREQUENCY COUNTER FM AM STANDARD SIGNAL GEN VTVM TAPE 2 OUT SET D SCOPE FM ANT IN 00 00 4 n00 00 Figure 8 ...

Page 11: ...INSTRUMENTATION CONNECTION DIAGRAM Cont SIGNAL GEN DC METER O O oa TP1 TP2 SET TAPE 2 OUT Figure12 DISTORTION METER D FM ANT IN SET DC METER Figure 11 AM FM S G Figure 10 ...

Page 12: ...OR MAXIMUM OUTPUT LEVEL D SET THE SIGNAL GENERATOR AND UNIT UNDER TEST TO 1400KHZ UL CSA 1404 KHZ UK AY EU E ADJUST TC404 FOR MAXIMUM OUTPUT 3 IF TRACKING ADJUSTMENT PROCEDURE A USING THE TEST SET UP DESCRIBED ABOVE FIG 5 SET THE SIGNAL GENERATOR AND UNIT UNDER TEST TO 600 KHZ UL CSA 603 KHZ UK AY EU 30dBUv B ADJUST T407 FOR MAXIMUM OUTPUT B FM SECTION 1 V C O ADJUSTMENT A CONNECT A DC VOLTMETER T...

Page 13: ... T402 T403 FOR MAXIMUM OUTPUT REDUCE THE SIGNAL GENERATOR OUTPUT LEVEL IF NECESSARY GENERATOR AND UNIT UNDER TEST TO 98MHZ FM MODE VOLTAGE BETWEEN TP1 AND TP2 FIG 10 UNTIL THE VOLTAGE IS IN THE RANGE 50mV TO 50mV DISTORTION FROM THE SIGNAL AT TAPE 2 FIG 10 FOR DISTORTION UNDER 0 15 C ABOVE UNTIL THE OPTIMUM DISTORTION HAS BEEN A SET THE SIGNAL GENERATOR AND UNIT UNDER TEST TO 98MHZ FM MODE 60 dBuV...

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Page 30: ...24 M2 Mechanical Explode M1 M M9 M9b 12 M14 MI 6 hhh111 7 20 48 49 7 M7 3 68 11 7 M67 e ...

Page 31: ...Exploded View ...

Page 32: ...es M20 8741301000 7 Taptite P BID3010 ZN3A 12 Pieces M21 C145216550 Volume PCB assembly M23 C145216540 Push PCB assembly M24 C146216710 Front PCB assembly M27 8941300800 9 Taptite B BID3008 ZN3A 4 Pieces M28 2008079705 Tuning PCB bracket M29 2013079705 Main heat sink M31 2021079705 Ther switch holder 2 Pieces M31a 8741300800 7 Taptite P BID3008 ZN3A 2 Pieces M32 8961301200 9 Taptite B CUP3012 ZN3A...

Page 33: ...th plate M62 8942300800 9 Taptite B BID3008 ZN3K 8 Pieces M63 1002079705 Rear panel M64 2059068803 Short pin 2 Pieces M65 2047068801 Lug terminal 7 2Q M66 0009068801 Gnd terminal assembly M67 8641300800 6 Taptite S BID3008 ZN3A 2 Pieces M68 8661400600 6 Taptite S CUP4006 ZN3A 4 Pieces M69 8742301000 7 Taptite P BI D3010 ZN3K 13 Pieces M70 C046216750 AC outlet PCB VERSIONS CHART VERSION VOLTAGE COU...

Page 34: ...SC3789 4100237890 L CH power Amp Q112 2SC3789 4100237890 R CH power Amp Q113 2SD669A 410030669A L CH power Amp Q114 2SD669A 410030669A _ R CH power Amp Q115 2SB649A 410010649A L CH power Amp Q116 2SB649A 410010649A R CH power Amp Q117 2SC3519 4100023519 L CH power Amp Q118 2SC3519 4100023519 R CH power Amp Q119 2SA1386 4100013860 L CH power Amp Q120 2SA1386 4100013860 R CH power Amp Q121 2SA970BL ...

Page 35: ...5 5154100225 EL CAP lOuF 25V 207 C3 4 7306522115 7306522115 Mult CAP 220uF 50V 107 C5 6 5154221210 5154221210 EL CAP 220uF lOV 207 C7 8 5091243513 5091243513 PL CAP 024uF 57 C9 10 5091682513 5091682513 PL CAP 0068uF 57 C11 12 5154100225 5154100225 EL CAP lOuF 25V 207 C13 14 5091152513 5091152513 PL CAP 0015uF 57 C15 16 7307110315 7307110315 Mult CAP 0luF 16V 10 7 C17 30 7306510115 7306510115 Mult ...

Page 36: ... 5104103441 5104103441 CER CAP OluF 500V 20 C306 307 5154102210 5154102210 EL CAP 680uF 80V 20 C308 309 5154470210 5154470210 EL CAP 47uF 100V 20 C310 311 5154470263 5154470263 EL CAP 47uF 63V 20 C312 313 5154100250 5154100250 EL CAP lOuF 50V 20 C314 5104103452 5104103452 CER CAP 0luF 80 20 C315 316 5154102235 5154102235 EL CAP 1000uF 35V 20 C317 319 5154100225 5154100225 EL CAP lOuF 25V 20 RESIST...

Page 37: ...4050439152 RES 390 ohm 1 4W R119 120 4070422074 4070422074 RN 2 ohm 1 4W R121 122 4271039155 4271039155 RES 390 ohm 1W R123 124 4050439152 4050439152 RES 390 ohm l 4W R125 128 4050433052 4050433052 RES 33 ohm l 4W R129 130 4050422152 4050422152 RES 220 ohm l 4W 5 R131 132 4050410152 4050410152 RES 100 ohm 1 4W R133 134 4050439052 4050439052 RES 39 ohm 1 4W R135 138 4050212252 4050212252 RES 1 2k o...

Page 38: ...m l 4W 8318 4170410255 4170410255 RES 1K ohm l 4W 8319 4050412352 4050412352 RES 12K ohm 1 4W 8320 322 4050482252 4050482252 RES 8 2K ohm l 4W 8321 323 4050415352 4050415352 RES 15K ohm l 4W VARIABLE RES VR2 RK163121A144 5020254102 VAR RES 50kCx2 Bass VR3 RK163121A161 5020214188 VAR RES 1OkCx2 Treble VR4 RK163111E293 5020114187 VAR 1OkW Balance SFR101 102 VZ068TLT 5226501756 SFR 0 5Kx Line SFR101 ...

Page 39: ...0020945P Switching Q703 2SA733P 410000733P Switching Q704 2SC945P 410020945P Switching Q705 2SA733P 410000733P Switching Q706 2SC945P 410020945P Switching DIODES D701 710 1SS176 4120901760 1SS176 D712 LTL 4231 4120642315 LED GRN CAPACITORS C701 5154109250 5154109250 EL CAP IuF 50V 80 207 C702 703 7306933052 7306933052 Mult CAP 33uF 50V 57 C705 7306610445 7306610445 Mult CAP IuF 50V 80 207 C708 511...

Page 40: ...er 3P20 SEN701 LTM 9052A4 71409052A4 Remote receiver X701 CSA 4 91MG 416090491M Resonator Lamp PCB assembly PC BOARD 4046216730 4046216730 PCB no components C046216730 C046216730 PCB assembly LAMPS LP701 702 18V 100mA 4700300005 Fuse lamp Tuner PCB assembly PC BOARD 4146216760 4146216760 PCB no components C146216760 C146216760 PCB assembly ICS IC401 LA1266 4152012660 AM FM demodulator IC402 NJM455...

Page 41: ...52 5121209752 Cer CAP 2P CH 0 25P C440 7306510215 7306510215 Mult CAP OOluF 50V 107 C441 443 7308622345 7308622345 Mult CAP 022uF 16V 80 207 C444 7306968055 7306968055 Mult CAP 68pF 50V 5 7 C445 7306610445 7306610445 Mult CAP IuF 50V 80 207 C446 5154101235 5154101235 EL CAP 100uF 35V 207 C447 5121100852 5121100852 Cer CAP lOpF CH 0 5P C448 7306610445 7306610445 Mult CAP IuF 50V 80 207 C449 7306610...

Page 42: ...50110452 4050110452 RES 100K ohm l 6W R406 4050130352 4050130352 RES 30K ohm l 6W R408 4050147252 4050147252 RES 4 7K ohm l 6W R409 4050110452 4050110452 RES 100K ohm l 6W R410 4050120352 4050120352 RES 20K ohm l 6W R411 412 4050110452 4050110452 RES 100K ohm l 6W R413 4050147352 4050147352 RES 47K ohm l 6W R414 4050115452 4050115452 RES 150K ohm l 6W R415 4050139452 4050139452 RES 390K ohm l 6W R...

Page 43: ...7K ohm l 6W 8471 4050120352 4050120352 RES 20K ohm l 6W 8472 4050110352 4050110352 RES 10K ohm l 6W 8473 4050133252 4050133252 RES 3 3K ohm 1 6W 8474 4050447052 4050447052 RES 47 ohm l 4W 8475 4050433352 4050433352 RES 33K ohm l 4W 8476 4050430252 4050430252 RES 30K ohm l 4W 8477 4050420252 4050420252 RES 2K ohm l 4W 8478 4050120352 4050120352 RES 20K ohm l 6W 8479 480 4050182352 4050182352 RES 82...

Page 44: ...33 AM filter FL406 TWS 358 735 4169705224 Mpx filter FL407 408 Mpx filter 4360400510 Mpx filter T401 403 E525HNS 200055 4310400880 FM RF coil T404 119AC 30099R 4340201570 FM IFT T405 TWS 358 732 4310100870 AM RF coil T406 TWS 358 731 4330101960 AM OSC coil T407 TWS 358 730 4340101360 AM IFT coil T408 TWS 358 734 4340201550 FM IFT A Quad coil T409 TWS 358 733 4340201560 FM IFT B Quad coil MISCELLAN...

Page 45: ...90600261 4490600261 Wire holder 6P20 Volume PCB assembly PC BOARD 4145216550 4145216550 PCB no components C145216550 C145216550 PCB assembly VARIABLE RES VR1 RK16312MC019 5025214185 VR 1OKBx2 Volume MISCELLANEOUS CN 10B 4490600261 4490600261 Wire holder 6P20 Display PCB assembly PC BOARD 4146216720 4146216720 PCB no components C146216720 C146216720 PCB assembly _ICS IC706 LC7582 4152075820 LCD Dri...

Page 46: ...uF 16V 207 C324 5154100225 5154100225 EL CAP lOuF 25V 207 RESISTORS R001 4060233519 4060233519 RES 3 3M ohm 1 2W Solder 8324 4050410252 4050410252 RES 1K ohm 1 4W 8325 4050110452 4050110452 RES 100K ohm 1 6W R326 4050133352 4050133352 RES 33K 1 6W COILS T301 EI 41 420A419280 SUB Transformer MISCELLANEOUS CN 4B 4490501004 4490501004 Male connector PH 5P El 4692000034 4692000034 Fuse holder PFC5000 ...

Page 47: ...ulty Readjust see Alignment instruc tions R F tracking faulty Readjust see Alignment instruc WEAK SOUND tions Low sensitivity Defective IC401 Check voltages Replace if necessary Poor contact in antenna circuit Check resistance and resolder Defective band selector switch Replace or repair the switch NO SOUND Open circuit of FM ant coil Check resistance or OSC coil Replace if necessary FM Defect in ...

Page 48: ...Packing Diagram ...

Page 49: ...AD 705 ITEM PARTS NO NAME 1 9705 1 5 SET 2 9002079705 GIFT BOX 3 9003079705 NASTER CARTON 4 9001079705 SNOW BOX F 5 9004038401 SOFT SHEET 6 9906006040 POLY BAG 60x60 7 9080019150 INSTRUCTION BOOK 8 9004079705 SNOW BOX B ...

Page 50: ...cl m n m D Z C D r NAD ELECTRONICS LONDON m m V O Ul ...

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