Denon-PMA720AEV14-int-sm维修电路原理图.pdf

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1、D&M Holdings Inc.SERVICE MANUALeeMODELJPE3E2EKEAE1CE1KCIPMA-720AEPPPMA-520AEPPINTEGRATED STEREO AMPLIFIERVer. 14 Some illustrations using in this service manual are slightly different from the actual set. Please use this service manual with referring to the operating instructions without fail. For p

2、urposes of improvement, specifications and design are subject to change without notice.Please refer to the MODIFICATION NOTICE.RadioFans.CN 收音机爱 好者资料库2CONTENTSABOUT THIS MANUAL .3What you can do with this manual .3Using Adobe Reader (Windows version) .4SAFETY PRECAUTIONS .6NOTE FOR SCHEMATIC DIAGRAM

3、 .7NOTE FOR PARTS LIST .7TECHNICAL SPECIFICATIONS .8DIMENSION .8DISASSEMBLY .91. FRONT PANEL ASSY .103. MAIN PCB ASSY .114. POWER TRANSFORMER .11ADJUSTMENT .12TROUBLE SHOOTING .131. The power can not be turned on. (Power indication LED does not light.） .132. The power turned on, but a sound does not

4、 output normally. (Both channels) .13BLOCK AND LEVEL DIAGRAM .15WIRING DIAGRAM .16PRINTED WIRING BOARDS .17MAIN .17FRONT .19HEADPHONE .19POWER (PMA-720AE) .20POWER (PMA-520AE) .20REMOTE CONTROL .21FUNCTION .21POWER SW .21VOLUME .21SCHEMATIC DIAGRAMS (1/2) .22TONE PART .22POWER PART .22FUNCTION SW PA

5、RT .22VOLUME PART .22POWER SW PART .22FLASHER INOUT PART .22MAIN PART .23EXPLODED VIEW (PMA-720AE) .24PARTS LIST OF EXPLODED VIEW (PMA-720AE) .25PACKING VIEW (PMA-720AE) .26PARTS LIST OF PACKING & ACCESSORIES (PMA-720AE) 26EXPLODED VIEW (PMA-520AE) .27PARTS LIST OF EXPLODED VIEW (PMA-520AE) .28PACKI

6、NG VIEW (PMA-520AE) .29PARTS LIST OF PACKING & ACCESSORIES (PMA-520AE) 29SEMICONDUCTORS .311. ICs .31PARTS LIST OF P.C.B. UNIT .35FRONT PCB ASSY (PMA-720AE) .35FRONT PCB ASSY (PMA-520AE) .38MAIN PCB ASSY (PMA-720AE) .40MAIN PCB ASSY (PMA-520AE) .46RadioFans.CN 收音机爱 好者资料库3ABOUT THIS MANUALRead the fo

7、llowing information before using the service manual.What you can do with this manualSearch for a Ref. No. (phrase)(Ctrl+Shift+F)You can use the search function in Acrobat Reader to search for a Ref. No. in schematic diagrams, printed wiring board diagrams, block diagrams, and parts lists.1.Press Ctr

8、l+Shift+F on the keyboard. The Search window appears.CtrlShiftF2.Enter the Ref. No. you want to search for in the Search window, and then click the Search button. A list of search results appears.3.Click an item on the list. The screen jumps to the page for that item, and the search phrase is displa

9、yed.4Using Adobe Reader (Windows version) Properties Click this button and check that the printer is set to a suitable paper size. Page to print Select the following checkbox. More Options : Current View Page Sizing & Handling Select the following checkbox. Size / Size Options : FitAdd notes to this

10、 data (Sign)The Sign function lets you add notes to the data in this manual.Save the file once you have finished adding notes.Example using Adobe Reader XOn the View menu, click Sign. The Sign pane appears.Example using Adobe Reader 9On the Document menu, click Sign. Magnify schematic / printed wiri

11、ng board diagrams - 1(Ctrl+Space, mouse operation)Press Ctrl+Space on the keyboard and drag the mouse to select the area you want to view. The selected area is magnified.CtrlSpace0 When you want to move the area shown, hold down Space and drag the mouse. When you want to show a full page view, press

12、 Ctrl+0 on the keyboard.Print a magnified part of the manualThe Properties dialog box and functions will vary depending on your printer.1. Drag the mouse to magnify the part you want to print.2. On the File menu, click Print.3. Configure the following settings in the Print dialog box.4. Click the Pr

13、int button to start printing.5Magnify schematic / printed wiring board diagrams - 2(Pan & Zoom function)The Pan & Zoom function lets you see which part of a magnified diagram is being shown in a separate window.Example using Adobe Reader XOn the View menu, point to Zoom, and then click Pan & Zoom. T

14、he Pan & Zoom window appears on the screen.Example using Adobe Reader 9On the Tools menu, point to Select & Zoom, and then click Pan & Zoom Window.Magnify schematic / printed wiring board diagrams - 3(Loupe Tool function)The Loupe Tool function lets you magnify a specific part of a diagram in a sepa

15、rate window.Example using Adobe Reader XOn the View menu, point to Zoom, and then click Loupe Tool. The Loupe Tool window appears on the screen.Example using Adobe Reader 9On the Tools menu, point to Select & Zoom, and then click Loupe Tool Window.6SAFETY PRECAUTIONSThe following items should be che

16、cked for continued protection of the customer and the service technician.LEAKAGE CURRENT CHECKBefore returning the set to the customer, be sure to carry out either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistanc

17、e from chassis to either side of the power cord is less than 460 kohms, the set is defective. Be sure to test for leakage current with the AC plug in both polarities, in addition, when the sets power is in each state (on, off and standby mode), if applicable.CAUTION Please heed the following caution

18、s and instructions during servicing and inspection. Heed the cautions!Cautions which are delicate in particular for servicing are labeled on the cabinets, the parts and the chassis, etc. Be sure to heed these cautions and the cautions described in the handling instructions. Cautions concerning elect

19、ric shock!(1) An AC voltage is impressed on this set, so if you touch internal metal parts when the set is energized, you may get an electric shock. Avoid getting an electric shock, by using an isolating transformer and wearing gloves when servicing while the set is energized, or by unplugging the p

20、ower cord when replacing parts, for example.(2) There are high voltage parts inside. Handle with extra care when the set is energized. Caution concerning disassembly and assembly!Through great care is taken when parts were manufactured from sheet metal, there may be burrs on the edges of parts. The

21、burrs could cause injury if fingers are moved across them in some rare cases. Wear gloves to protect your hands. Use only designated parts!The sets parts have specific safety properties (fire resistance, voltage resistance, etc.). Be sure to use parts which have the same properties for replacement.

22、The burrs have the same properties. In particular, for the important safety parts that are indicated by the z mark on schematic diagrams and parts lists, be sure to use the designated parts. Be sure to mount parts and arrange the wires as they were originally placed!For safety seasons, some parts us

23、e tapes, tubes or other insulating materials, and some parts are mounted away from the surface of printed circuit boards. Care is also taken with the positions of the wires by arranging them and using clamps to keep them away from heating and high voltage parts, so be sure to set everything back as

24、it was originally placed. Make a safety check after servicing!Check that all screws, parts and wires removed or disconnected when servicing have been put back in their original positions, check that no serviced parts have deteriorate the area around. Then make an insulation check on the external met

25、al connectors and between the blades of the power plug, and otherwise check that safety is ensured.(Insulation check procedure)Unplug the power cord from the power outlet, disconnect the antenna, plugs, etc., and on the power. Using a 500V insulation resistance tester, check that the insulation resi

26、stance value between the inplug and the externally exposed metal parts (antenna terminal, headphones terminal, input terminal, etc.) is 1M or greater. If it is less, the set must be inspected and repaired.Many of the electric and the structural parts used in the set have special safety properties. I

27、n most cases these properties are difficult to distinguish by sight, and the use of replacement parts with higher ratings (rated power and withstand voltage) does not necessarily guarantee that safety performance will be preserved. Parts with safety properties are indicated as shown below on the wir

28、ing diagrams and the parts list in this service manual. Be sure to replace them with the parts which have the designated part number.(1) Schematic diagrams .Indicated by the z mark.(2) Parts lists .Indicated by the z mark.The use of parts other than the designated parts could cause electric shocks,

29、fires or other dangerous situations.CAUTION Concerning important safety parts7NOTE FOR SCHEMATIC DIAGRAMWARNING:Parts indicated by the z mark have critical characteristics. Use ONLY replacement parts recommended by the manufacturer.CAUTION:Before returning the set to the customer, be sure to carry o

30、ut either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the set is defective.WARNING:DO NOT return the set to the customer unless the prob

31、lem is identified and remedied.NOTICE:ALL RESISTANCE VALUES IN OHM. k=1,000 OHM / M=1,000,000 OHMALL CAPACITANCE VALUES ARE EXPRESSED IN MICRO FARAD, UNLESS OTHERWISE INDICATED. P INDICATES MICRO-MICRO FARAD. EACH VOLTAGE AND CURRENT ARE MEASURED AT NO SIGNAL INPUT CONDITION. CIRCUIT AND PARTS ARE S

32、UBJECT TO CHANGE WITHOUT PRIOR NOTICE.Parts indicated by nsp on this table cannot be supplied.When ordering a part, make a clear distinction between 1 and I (i) to avoid mis-supplying.A part ordered without specifying its part number can not be supplied. General-purpose Carbon Chip Resistors are not

33、 included are not included in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.)Parts indicated by the z mark have critical characteristics. Use ONLY replacement parts recommended by the manufacturer.General-purpose Carbon Film Resistor in the P.W.Board parts list. (Refer to

34、 the Schematic Diagram for those parts.)Part indicated by mark is not illustrated in the exploded view.WARNING:1.2.3.4.5.6.NOTE FOR PARTS LIST8TECHNICAL SPECIFICATIONS nPMA-720AE n Power amplifier sectionRated output power : 2-channel driving (CD SP OUT) 50 W + 50 W (8 , 20 Hz 20 kHz, T.H.D. 0.07 %)

35、Dynamic power : 85 W + 85 W (4 , DIN, 1 kHz, T.H.D. 0.7 %)Total harmonic distortion : 0.01 % (Rated output: 3 dB), 8 , 1 kHzOutput terminals : Speaker A or B: 4 16 A + B: 8 16 Suited for headphones/stereo headphones n Pre amplifier sectionEqualizer amplifier output (REC OUT terminals) : 150 mVInput

36、sensitivity/Input impedance :PHONO (MM): 2.5 mV/47 k CD, TUNER, AUX, Network, RECORDER: 120 mV / 30 k (SOURCE DIRECT OFF) 120 mV / 16 k (SOURCE DIRECT ON)RIAA deviation : PHONO (MM): 20 Hz 20 kHz0.5 dB n Overall performanceS/N (IHFA weight) : PHONO (MM): 86 dB (With input terminals short-circuited,

37、5 mV input signal) CD, TUNER, AUX, Network, RECORDER: 107 dB (input terminals short-circuited)Tone control : BASS: 100 Hz8 dB TREBLE: 10 kHz8 dBLoudness: 100 Hz: +6 dB, 10 kHz: +6 dB n GeneralPower supply : AC 230 V, 50/60 HzPower consumption : 200 WPower consumption in standby mode : 0.3 WPower out

38、lets : 3 switched outlets, total capacity 100 W (0.43 A) nPMA-520AE n Power amplifier sectionRated output power : 2-channel driving (CD SP OUT) 45 W + 45 W (8 , 20 Hz 20 kHz, T.H.D. 0.07 %)Dynamic power : 70 W + 70 W (4 , DIN, 1 kHz, T.H.D. 0.7 %)Total harmonic distortion : 0.02 % (Rated output: 3 d

39、B), 8 , 1 kHzOutput terminals : Speaker: 4 16 Suited for headphones/stereo headphones n Pre amplifier sectionEqualizer amplifier output (REC OUT terminals) : 150 mVInput sensitivity/Input impedance :PHONO (MM): 2.5 mV/47 k CD, TUNER, AUX, Network, RECORDER: 120 mV / 30 k (SOURCE DIRECT OFF) 120 mV /

40、 16 k (SOURCE DIRECT ON)RIAA deviation : PHONO (MM): 20 Hz 20 kHz0.5 dB n Overall performanceS/N (IHFA weight) : PHONO (MM): 84 dB (With input terminals short-circuited, 5 mV input signal) CD, TUNER, AUX, Network, RECORDER: 105 dB (input terminals short-circuited)Tone control : BASS: 100 Hz8 dB TREB

41、LE: 10 kHz8 dBLoudness: 100 Hz: +6 dB, 10 kHz: +6 dB n GeneralPower supply : AC 230 V, 50/60 HzPower consumption : 185 WPower consumption in standby mode : 0.3 WPower outlets : 1 switched outlets, total capacity 100 W (0.43 A)Weight : 7.1kg (PMA-720AE) 6.8kg (PMA-520AE)121434308DIMENSION9DISASSEMBLY

42、 Disassemble in order of the arrow in the following figure. In the case of the re-assembling, assemble it in order of the reverse of the following flow. In the case of the reassembling, observe Caution concerning disassembly and assembly!. If wire bundles are untied or moved to perform adjustment or

43、 replace parts etc., be sure to rearrange them neatly as they were originally bundled or placed afterward. Otherwise, incorrect arrangement can be a cause of noise generation.About the photos used for descriptions of the DISASSEMBLY section The shooting direction of each photograph used herein is in

44、dicated on the left side of the respective photograph as Shooting direction: *. (* : A,B,C,D) Refer to the diagram below about the shooting direction of each photograph. Photographs with no shooting direction indicated were taken from the top of the set. The photograph is PMA-520AEE2 model. The view

45、point of each photograph(Shooting direction)View from the topFront sideShooting direction: BShooting direction: DShooting direction: CShooting direction: APMA-720AEFRONT PANEL ASSYRefer to DISASSEMBLY 1. FRONT PANEL ASSYand EXPLODED VIEWFRONT PCB(Ref. No. of EXPLODED VIEW : C1)FUNCTION PCB(Ref. No.

46、of EXPLODED VIEW : C2)VOLUME PCB(Ref. No. of EXPLODED VIEW : C3)SW/HP PCB(Ref. No. of EXPLODED VIEW : C4)ON/OFF PCB(Ref. No. of EXPLODED VIEW : C5)MAIN PCB ASSYRefer to DISASSEMBLY 3. MAIN PCB ASSYand EXPLODED VIEWMAIN PCB ASSY(Ref. No. of EXPLODED VIEW : C9POWER TRANSFORMERRefer to DISASSEMBLY 4. P

47、OWER TRANSFORMERand EXPLODED VIEWPOWER TRANSFORMER(Ref. No. of EXPLODED VIEW : C10 )POWER PCBRefer to DISASSEMBLY 2. POWER PCBand EXPLODED VIEWPOWER PCB(Ref. No. of EXPLODED VIEW : C6)CABINET TOP101. FRONT PANEL ASSY(1) Remove the screws.(2) Cut the wire clamp bands.(3) Disconnect the connector wire

48、s, then remove the screws.TOP CABINETFRONT PANEL ASSYProceeding : View from the bottomPMA-720AEcutcutcutcutFRONT PANEL ASSYPMA-720AECN52CN51CN53CN10CN94CN58CN50CN52FRONT PANEL ASSYPlease refer to EXPLODED VIEW for the disassembly method of each PCB included in FRONT PANEL ASSY.112. POWER PCB3. MAIN

49、PCB ASSY4. POWER TRANSFORMERTOP CABINETPOWER PCBProceeding : Please refer to EXPLODED VIEW for the disassembly method of POWER PCB.TOP CABINETMAIN PCB ASSYProceeding : Please refer to EXPLODED VIEW for the disassembly method of MAIN PCB ASSY.TOP CABINETPOWER TRANSFORMERProceeding : Please refer to E

50、XPLODED VIEW for the disassembly method of POWER TRANSFORMER.12ADJUSTMENTAdjusting Idling CurrentRequired measurement equipment: DC Voltmeter1. Preparation(1) Avoid direct blow from an air conditioner or an electric fan and humidity should be moderate, and place the set at normal usage environment.