Denon-PMA750-int-sm维修电路原理图.pdf

《Denon-PMA750-int-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Denon-PMA750-int-sm维修电路原理图.pdf（15页珍藏版）》请在收音机爱好者资料库上搜索。

1、. . . . . . . . . . . . . . . . . . . . . . . $ $ - Cur 1d3VlQ N01133NNO3 - . . . . . . . . . . . . . . . . . . . PJVt13V10 9NlUlM RadioFans.CN 收音机爱 好者资料库SPECIFICATIONS PMA-770 POWER AMPLIFIER SECTION Circuit Type: Rated Output Power: All stage direct DC servo circuit Both channel drive tt,($Lzt$Hz

2、100 W + 100 W (DIN, U.K. EUROPE. U.S.A.) 1 kHz (4 ohm Load) 150 W + 150 W (DIN, U.K., U.S.A.) 1 kHz (4 ohm Load) 50 W + 50 W (IEC) (Subject to change by temperature test) Total Harmonic Distortion: 0.008% (20 HZ - 20 kHz at -3 dB rated output 8 ohm Load) 0.02% (20 Hz - 20 kHz at rated output 8 ohm L

3、oad) (U.S.A.) lnlarmodulation Distortion: Below 7 kHz I 6 0 HZ : 114 0.002% (at amplitude output equlvalent to rated output) Output Band Width: 5 tiz - 100 kHz UHF THD 0.035%) Transmission Characteristicr: lnput Sensilivity: Input Impedance: Output Impedance: Output Terminals: EQUALIZER AMPLIFIER SE

4、CTION Equalizer Amplifier Output: lnput Sensitivityllnput Impedance: RlAA Deviation: , OVERALL CHARACTERISTICS SN Ratio (IHFA Network): Tone Control djustabli Range: Filtering Charxtaristicr Loudness Characteristics: AC OUTLET: (For U.S.A. and Canada) POWER SOURCE: POWER CONSUMPTION: DIMENSIONS: WEI

5、GHT: 1 Hz - 250 kHz + : : (at 1 W output) 150 mV 47 k ohm 0 08 ohm (1 kHz) Speaker: A and B Load 4 - 16 ohm A + B Load8- 16ohm HeadphonelStereo headphone Maximum Output: 10 V (at 47 k ohm Load) Rated Output: 150 mV Total harmonic wave distortion: below 0.002% (at 1 kHz. 8 V output) PHONO-1. 2 MM 2.5

6、 mV 47 k ohm MC 125pV lWohm TUNER 150 mV 47 k ohm AUX. TAPE 150 mV 47 k ohm PHONO-l;2 MM within i0.2 dB (20 Hz - 100 kHz) MC within t0.2 dB (20 Hz - 100 kHz) PHONO-l:2 MM 90 dB (input terminals short-circuited lor 2.5 mV input) MC 73 dB (input terminals short-circuited for 250 pV input) TUNER. TAPE.

7、 AUX: 110 dB (input terminals short-circuited) BASS 100 Hz i 8 dB TREBLE 10 kHz i 8 dB SUBSONIC 18 Hz, 6 dBloct Low frequency 100 Hz + 7 dB High frequency 10 kHz + 6 dB SWITCHED x 2, 100 W (Total) UNSWITCHED x 1. 250 W Germany and France AC 220 V. 50 Hz; U.K. AC 240 V. 50 Hz; U.S.A. AC 120 V, 60 Hz;

8、 Hong Kong AC 200V. 50 Hz 270 W 1U.S.A.); 400 W (IEC); 290 W (Hong Kong); 800 W Maxlmum Output 434 mm (W) x 132 mm (HI x 407 mm (D) (including rubber feet, control knobs, and terminals) 12 kg Design and specifications are subject to change without prior notice. NOTE: The following code correspond to

9、 the appropriate models. E2 lor Enrope EF for France, EK for U.K. 3 for U.S.A., E3 for Canada and E l for Hong Kong, Singapore. This Service Manual is prepared based on PMA-770 E2. SPECIFICATIONS PMA.750 POWER AMPLIFIER SECTION Circuit Type: Rated Output Power: Toul Harmonic Distortion: Intermodulat

10、ion Distortion: Output Band Width: Tnnsmirrion Chancterirticr: lnput Sensitivity: lnput Impedance: Output lmpedance: Output Terminals: EQUALIZER AMPLIFIER SECTION Equalizer Amplifier Output lnput Senritivityllnput Impedance: RlAA Deviation: OVERALL CHARACTERISTICS SN Ratio (IHFA Network): Tone Contr

11、ol Adjustable Range: Filtering Charxteristics: Loudness Characteristics: AC OUTLET: (For U.S.A. and Canada) POWER SOURCE: POWER CONSUMPTION: DIMENSIONS: WEIGHT: Design and specificatio All stage direct DC servo circuit Both channel drive , ( o L H z 80 W + 80 W (DIN. U.K., EUROPE. U.S.A.) 1 kHz (4 o

12、hm Load) 100 W + 100 W (DIN, U.K., U.S.A.) 1 kHz (4 ohm Load) 50 W + 50 W (IEC) (Subiect to change by temperature test) 0.008% (20 Hz - 20 kHz at -3 dB rated outwt 8 ohm Load) 0.02% (20 Hz - 20 kHz at rated output 8 ohm Load) (U.S.A.) Below 7 kHz I 6 0 Hz : 114 0.002% (at amplitude output equlvalent

13、 to rated output) 5 Hz - I00 kHz llHF TIiD 0.035%) 1 Hz - 250 kHz z : : (at 1 W output) 150 mV 47 k ohm 0.08 ohm (1 kHz) Speaker: A and 8 Load 4 - 16 ohm AtBLoad8-16ohm HeadphonelStereo headphone Maximum Output: 10 V (at 47 k ohm Load) Rated Output: 150 mV Total harmonic wave distortion: below 0.002

14、% (at 1 kHz, 8 V output) PWONO MM 2.5 mV 47 kohm MC 125pV 100 ohm TUNER 150 mV 47 k ohm AUX, TAPE 150 mV 47 k ohm PWONO MM withln i0.2 dB (20 Hz - 100 kHz) MC withln fO 2 dB (20 Hz - 100 kHz) PHONO MM 88 dB (input terminals short-circuted for 2 5 mV lnput) MC 72 dB (input termnals short-circuited fo

15、r 250 pV Input) TUNER. TAPE. AUX: 110 dB llnput terminals short-crcuited) BASS 100 Hz i 8 dB THEBLE 10 ktiz i 8 dB SUBSONIC 18 Hz, 6 dBloct Low frequency 100 Hz + 7 dB 111gh frequency 10 kHz + 6dB SWITCHED x 2, 100 W (Total) UNSWITCHED x 1. 250 W Germany ar ran;e AC 220 V. 50 Hz; U.K. AC 240 V. 50 H

16、z; U S A. AC 120 V. 60 Hz; tiong Kong AC 200V. 50 Hz 230 W (US A,); 400 W IIECI; 200 W (Hong Kongl; 680 W Maximum Output 434 mm (W) x 132 mm (HI x 407 mm (D) (ncludng rubber feet. control knobs. and termnalsl 12 kg ns are subject to change without prior notice. RadioFans.CN 收音机爱 好者资料库BLOCK D I A G R

17、 A M PMA-770 METHOD OF ADJUSTMENT Schematic View of Tone Power for ETC-453 (PMA-770). ETC-453J (PMA-750) I ETC-453.453J Tone & Po*., Unit Components Sida FRONT PANEL SIDE Schematic View for Input and Equalizer for ETC-452 (PMA-7701, ETC-452J (PMA-750) AEC OUT T ETC-452 Input EO Unit Components Sjde

18、L Adjustment of Idling Current (ETC-453,. ETC-453J) Preparation 1. Keep the unit away from direct wind blown by an airandi. tioner and an electric fan. Keep the unit under normal condi- tions. Adjust the range of ambient temperature to 15 - 3 0 2. Set the following switches as follow: POWER (power s

19、witch) to off VOLUME (volume control) to - (rmin.) DIRECT COUPLE (direct switch) to DIRECT SPEAKER (speaker terminal) to no load (a speaker and a dummy resislor are not connected) Adjustment I. Remove the top cover and turn the variable resistors VRl l and VR12 of ETC-453 and ETC-453J (tone and powe

20、r unit) in the clockwire direction until they stop. Connect a DC volt. meter between the negative terminal 9 and the positive termi- nal 8, and between the positive terminal 17 and the negative terminal 18. 2. Connect the power source cord to an AC outlet. Turn on the power switch. Turn the variable

21、 resistors URI I and UR12 in the counterclockwise direction within one minute. Preset adjust the voltages at the respective test points a s follow3: PMA-770 15 t 2 mV PMA-750 l l ? 2 mV 3. Set the variable resistors VRI 1 and VR12 2 to 3 minutes after the presetting a s follows: PMA-770 I 9 + 1 mV P

22、MA-750 13 t 1 mV Adjustment of ETC-452 and ETC.452J Preparation I. Insert the short pin into the phono input terminal. 2. Connect a digital voltmeter between the REC output termi. nals (LCH and RCHI. the output voltage at the digital voltmeter mlrst be 0.01 - 1 mV (DC). 3. Connect a resistor of 100

23、k ohms (114 W) between the re- sistors R45 and R46 of I 0 M ohms of the unit in order to make measurement easy (only for PMA-750). 4. Set the RECOUT SELECTOR to the phono position and set the volume control to -a (0 min.). Adjustment 1. Turn on the power switch. After two minutes, perform !he follow

24、ing procedures. PMA-770. PMA-750 Adjust the variable resistor 1 Isemi.fixed resistor of 100 k ohms) so that the output for LCH at the digital volt. meter reads less than 0.5 V (DC). Adjust the variable resistor 2 (semi.fixed resisot of 100 k ohms) so that the output for RCH at the digital voll- mete

25、r reads less than 0.5 V (DC). www.freeservicemanuals.infoFree World of ManualsEXPLODED VlEW OF CHASSIS AND CABINET A!Eluns tmponanl safely item. n h k h must bs replrsd. when necessary, by a part wscmlmed or membnu the 1p8lkslaon b y the manutxlurar. This EXPLODE0 VlEW 8% prepared bared on PMA-770E2

26、 EXPLODED VlEW OF PARTS LlST (PMA-770) ?HANS CHASSIS ASSY FIXING SCREW POWER HADIATOH THANSISTOH 2SA11461R11l01 THANSlSlOR 2SC170ti(H11(01 CROSS PAN SCREW WlTH W S W 3x12 VOLUME UNIT CARTHIDGE SW U N l l ROTARY HEMOTE BLIND BLIND SHEET l A l INSULATING SHEET WIRE ASSY TAPPING SCREW WlTH W. 3x8 CUSHI

27、ON BOTTOM COVER Nare: 1 See addendum larl b l o w lor the psrls k t h aserrk 1.1 on the Re1 No. and ,he olller Parts no1 inclurlrd &I, I l b l b llrl 2. The Ilrt 81 prepared bared on 2. 3. . Mdrh ram* as PMA-750E2. 1430224002 4610155011 46 101 55024 4610155040 I2YX)15006 1430240002 1430230009 I43022

28、8008 ETC 045483 4770096007 ETC 045485 ETC 045484 4 120988008 44 70052009 4120962008 4630274066 1130290103 LENS BLIND BLIND BLIND BLIND SHEET (81 FILTEH WINDOW PLATE WINDOW LCD LJNII PUS11 H I V t T POWEH LED UNlT SPEAKEH LED UNlT LAMP COVER FIX SCREW CONNECriNG BRACKEl SPHING PUSI KNOB (INPUT) PUSII

29、 KNOB ISPI TOP COVER S O P P E R SPACER TAPPING SCREW ITRUS) 4xE KNOB KNOB l A l KNOB IBI COLOR PLATE PANEL BUSH /POWER) PUSH K N 0 8 ASSY SPRING SOPPER 7P W TERMINAL - 87. 4150088004 INSULATING SHEET 88. 4700042005 CROSS PAN SCREWWITH S WASliEH 3x8 IBLACK) 89. 4756008008 N U T 6 3 9 0 2020013004 FU

30、SE HOLDER 91 5130159185 FUSE LABEL 92 2061015087 FUSE 14A1 93 20380fflW9 5P CONNECTOR IDIN) 94 2412156003 CAHBON FILM HESISTOR 470 k ollnl 95 1 4630274024 1 SPRING . . . .A - 1 . . . . . . . . _.- PACKING & ACCESSORIES (not oncludcd EXPLODED VIEW) - . .- - -. . pj-:- 1 :;:5:; ;I;SIIEET .C 5010755049

31、 CAH r O N CASE d 1 5110994001 ( INST MANUAL ! ADDENDUM LlST I r I - Part NO. / I No, 1 & Dncriplionl / - d d d H i i p p p p 1 i . II-l_;I ? ; j i i ; : l y - - - : I I li HEADPHONE JACK UN ETC 045562 SPEAKER SWITCH UNIT ETC 045203 SPEAKER TERMINAL UNIT E l C 045204 I www.freeservicemanuals.infoFre

32、e World of ManualsEXPLODED VIEW OF PARTS LIST IPMA.750) hole I See anclendvm 11rl below for I l e palls walh e$tcrlrk I.) on tho Re1 N o and the olhee parll not nnrludcd o n tf,oa llrt 2 Tho 1-tr er tveneved harcd an 7 ADDENDUM LlSl 1 BACKPANEL ETC.0452K2 25 SPEAKER SWITCH UNIT ETCIJ452K3 ETCO452M3

33、28 RECT & LCD UNIT ETC0454K1 ETC-0454Ml 29 LAMP UNIT ETC 0454K2 ETC-M54M2 64 LCD UNIT ETCIJ454K3 ETC4454M3 6 6 POWER LED UNIT ETCO454K5 ETC 0454M5 6 7 SPEAKER LED UNIT ETC 0454K4 ETC4454M4 6 8 LEOUNIT ETC-0454K6 ETC-0454M6 9 8 WATTAGE LABEL 5130683004 9 9 VOLTAGE LABEL 5130362008 100 BLINOSIiEET 513

34、0348006 101 WIRE ASSY 7030176151 102 EARTH LABEL 5130140000 103 TOOTH WASHER 0 3 4753001051 104 CAUTION CARD 5130354006 105 TOOTH WASHER 0 4 4753100004 PACKING & ACCESSORIES In01 bncludad EXPLODED VIEW) - -. . c CARTON CASE 5010755036 e IMPORTANT LABEL 5130372001 I GUARANTEE CARD 5 150230000 - - - -

35、 - .- Par1 N . m . k Descrplmns - BACK PANEL TFRMINAL ASSY WAStIFR ACCORD -7 CORDBUSH , , - TAPPING SCREW li13x8 MFNIB SIDE CHASSIS HOLD PI ATE MAIN CHASSIS SUPPORT BRACKET SHEET ETC 0454K3 4110096007 ETC-0454K5 ETC 0454K4 ETC 0454K6 FTC-0454K 1 4 120962008 4630214066 1130290103 1130291102 10201 280

36、00 1040034006 122006900B 4734BOl005 11 20265203 11 20359106 1 1 20374000 1430354019 I460430109 1130171222 4630220007 1190014002 7050089008 4 150088004 4 10004 2005 LCD UNlT PUSH RIVET POWER LED UNIT SPEAKER LED UNIT LEO UNIT LED UNIT CONNECTING BRACKET SPAING - . FRONT CltASSISr-. ) PUSH SWITCH 4 4

37、, - ; . . CERAMIC CAP.0.0047uF 460 CROSS PAN SCRFW WI TH S WASIIFII 3x6 INPU 1 & EO UNlT IiEADPItONE JACK UNIT SPEAKER SWITCH UNIT I r n I F W C ius KNOB IINPUTI PUSH KNOB ISPI TOP COVER STOPPER SPACER TAPPING SCREW ITRUSI 4, KNDR KNOE IAI KNOB lCl COLOR PLATE PANEL BUSH IPOWER) PUSH KNOB ASSY SPRIN

38、G STOPPER 7P W TERMINAL INSULATING SHEET CROSS PAN SCREW WITH - - - . - - . - . - . 27 / 4130354019 TAPPING SCRFW 1213xR 28 ETC0454KI RECT & LCOUNIT 29 ETC0454K2 LAMP UNIT 30 4730358015 TAPPING SCREW 1713x14 31 ETC0453JI TONE & POWER UNIT 37 ETC0453.12 VOIIIMF ONIT 33 ETC0453J3 CA117t71O(iE SW l l N

39、 l T 3 4 - 2120197008 ROTAllY REMOTE . - J 3 - 36 1250014007 RLIND SHEET IA) 37 1 4150208004 INSlJLATlNG SIIEET 38 2030116106 WIRE ASSY 39 4700044005 TAPPING SCREW WITH W 3xR 40 . 4610157000 CUSIIION 41 , IOM450007 BOTTOMCOVER 47. : 1048001002 FOOT 2038084009 5P CONNECTOR IDINI 2412156003 1 CARRON F

40、ILM RESISTOR 43 4730355018 TAPPING SCREW 1213x10 44 / 4150197005 INSULATINGSHEET 45 j i Z 2 2 K 4 SPFAKER TERMINAL UNIT 46 CORD HOLDER A.47 n35)44002 P O W R TRANS . .;:-:. . . . x i . 48 47304-032 TAPPING SCREW 17l4x18 IBLACKI 49. ! 4350052018 FLEXlRl F 91 lnFR 470 k ohm - 4 8 : 0 2 ? 0 2 ! 1 n l -

41、 .- PACKING ACCESSORIES 5040064001 CABINET SHEET- - 5030301 101 CUSHION 5010155036 CARTON CASE 51 109S4001 INST MANUAL I www.freeservicemanuals.infoFree World of Manualswww.freeservicemanuals.infoFree World of Manuals1P-n 1 ETC-453 & ETC-453J TONE & 0. UNIT PARTS LIST Hef. Pert Name & Descriptions 1

42、 1 Pert No. I Pert Name 6 0ostriptionr . - - - - -. - I VR001 VR003 VR005 VR007 VROl 1 VR012 R013 R014 R015 R016 R017 R018 R019 R020 RO2l R022 R03 1 R03 2 R035 R036 R065 R 066 R06 7 R068 R 069 R070 R07 1 R072 R073 no74 R077 R078 RO 79 R080 R085 R086 R087 R088 R107 R108 R l l l R112 R115 R116 n i 2 i

43、 R122 R123 R124 R125 n i x R 127 R 128 n129 R130 R131 R 132 R133 R 134 R135 R136 , R137 n 138 R139 R140 11 14 1 R142 R143 R144 A145 R 146 R147 R148 R 149 R 150 R151 RESISTORS (not included Carbon Film t5%, YIW Type) VARIABLE RESISTOR 55 k ohm M A I N VARIABLE RESISTOR 100 k ohm BALANCE VARIABLE RESI

44、STOR 100 k ohm BASS VARIARLE RESISTOR 50 k ohm TREBLE SEMl FIXED RESISTOR 10 k ohm SEMl FIXED RESISTOR 10 k ohm 100 ohm 25% %W CAR0ON F I L M 100 ohm t5% %W CARBON F lLM 8.2 k ohrn i2% %W CARBON F lLM 8.2 k ohm t2% %W CARBON F l L M 8.2 k ohm k2% %W CARBON F I L M 8.2 k ohrn t296 %W CARBON F I L M 3

45、90ohm t5%W CARBONFILM 390ohm tS%W CARBONFILM 390 ohm t5% %W CARBON FILM 390ohm t5% %W CARBONFILM 20 M ohm t 10% %W CARBON COMPOSIT 20 M ohm t 10% %W CARBON COMPOSIT 750 ohm t5% %W CARBON COMPOSIT 750 ohm 15% %W CARBON COMPOSIT 6.8 k ohm t5% 1 W METAL OXlDE F I L M 6.8 k ohm t5% 1W METAL OXlDE F I L

46、M 100 ohm 92% %W CARBON F I L M l o o o h m t m x w CARBONFII-M l00ohm 12% %W CARBON F l L M 100 ohm t2% %W CARBON FILM 47 ohm t5% 1W METAL OXlDE F l L M 47 ohm t5% 1W METAL OXlDE F l L M 47 ohm t5% 1W METAL OXlDE F l L M 47 ohm t5% 1 W METAL OXlDE F l L M 470 ohm t5% %W CARBON F l L M 470 ohm t5% %

47、W CARBON F l L M 1 k ohm 25% %W CARBON F l L M 1 k ohm ?5% %W CARBON FILM 2.7 k ohm ?5% 1W METAL OXlDE F l L M 2.7 k ohm t5% 1W METAL OXIDE F l L M 2.7 k o h m ?5% 1W METALOXIDE F l L M 2.7 k ohm 25% 1W METAL OXlDE FILL1 1 k ohm 12% %W CARBON F l L M 1 k ohm 12% %W CARBON F l L M 82 ohm t5% %W CARBO

48、N FILM 82 ohm 95% %W CARBON F l L M 1 k ohm t2% / . W CARBON FILM 1 k o h m ? % % W CARBONFILM 5.6 k ohm t5% 2W METAL OXlDE F l L M 5.6 k ohm t5% 2W METAL OXIDE F l L M 5.6 k ohm 25% 2W METAL OXlDE F l L M 5.6 k ohm 25% 2W METAL OXlDE F l L M 1 k ohm t5% 1W METAL OXIDE F l L M 1 k ohm t5% 1W METAL O

49、XlDE F l L M 1 k ohm 15% 1W METAL OXlDE F l L M 1 k ohm t5% 1W METAL OXlDE F l L M 27 k ohm t5% HW CARBON F l L M 27 k ohm t5% XW CARBON F l L M 120 ohm 22% %W CARBON F l L M 1 M o h m t296 %W CARBON F l L M 120 ohm t2% YIW CARBON F l L M 120 ohm 92% %W CARBON F l L M 4.7 ohm t5% 1W METAL OXlDE F l

50、L M 4.7 ohm t5% 1W METAL OXlDE F l L M 4.7 ohm t5% 1W METAL OXlDE F l L M 4.7 ohm 95% 1W METAL OXlDE F l L M 33 dhm 12% YIW CARBON F l L M 33 ohm 12% %W CARBON FILM 33 ohm t 2% %W CAnOON FILM 33 ohm 2296 %W CARBON F1I.M 33 ohm 12% %W CARBON F l L M 33 ohm 92% %W CARBON F l L M 0.4710.47 ohm t l 0 %