Denon-AVR788-avr-sm维修电路原理图.pdf

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1、Denon Brand Company, D&M Holdings lnc.For purposes of improvement, specifications and design are subject to change without notice.Please use this service manual with referring to the operating instructions without fail.Some illustrations using in this service manual are slightly different from the a

2、ctual set.注意前、必読。本機、火災、感電、対安全性確保、配慮、法的電気用品安全法、所定許可得製造。従際、安全性維持、記載注意事項必守。本機仕様性能改良、予告変更。補修用性能部品保有期間、製造打切後 8 年。修理際、必取扱説明書参照上、作業行。本文中使用、説明都合上現物多少異場合。X0353 V.03 DE/CDM 0802SERVICE MANUALAV SURROUND RECEIVERMODELJPE3E2EKE2AE1CEUTAVR-1908?AVR-788? ?Ver. 3Please refer to theMODIFICATION NOTICE.RadioFans.CN

3、收音机爱 好者资料库2AVR-1908 / AVR-788Please heed the points listed below during servicing and inspection. Heed the cautions!Spots requiring particular attention when servicing, suchas the cabinet, parts, chassis, etc., have cautions indicatedon labels or seals. Be sure to heed these cautions and thecautions

4、 indicated in the handling instructions. Caution concerning electric shock!(1) An AC voltage is impressed on this set, so touching in-ternal metal parts when the set is energized couldcause electric shock. Take care to avoid electric shock,by for example using an isolating transformer andgloves when

5、 servicing while the set is energized, un-plugging the power cord when replacing parts, etc.(2)There are high voltage parts inside. Handle with extracare when the set is energized. Caution concerning disassembly andassembly!Though great care is taken when manufacturing parts fromsheet metal, there m

6、ay in some rare cases be burrs on theedges of parts which could cause injury if fingers aremoved across them. Use gloves to protect your hands. Only use designated parts!The sets parts have specific safety properties (fire resis-tance, voltage resistance, etc.). For replacement parts, besure to use

7、parts which have the same properties. In par-ticular, for the important safety parts that are marked z onwiring diagrams and parts lists, be sure to use the desig-nated parts. Be sure to mount parts and arrange thewires as they were originally!For safety reasons, some parts use tape, tubes or other

8、in-sulating materials, and some parts are mounted away fromthe surface of printed circuit boards. Care is also taken withthe positions of the wires inside and clamps are used tokeep wires away from heating and high voltage parts, sobe sure to set everything back as it was originally. Inspect for saf

9、ety after servicing!Check that all screws, parts and wires removed or discon-nected for servicing have been put back in their original po-sitions, inspect that no parts around the area that has beenserviced have been negatively affected, conduct an insu-lation check on the external metal connectors

10、and betweenthe blades of the power plug, and otherwise check thatsafety is ensured.(Insulation check procedure)Unplug the power cord from the power outlet, disconnectthe antenna, plugs, etc., and turn the power switch on. Us-ing a 500V insulation resistance tester, check that the in-sulation resista

11、nce between the terminals of the powerplug and the externally exposed metal parts (antenna ter-minal, headphones terminal, microphone terminal, inputterminal, etc.) is 1M or greater. If it is less, the set mustbe inspected and repaired.Concerning important safetypartsMany of the electric and structu

12、ral parts used in the sethave special safety properties. In most cases these prop-erties are difficult to distinguish by sight, and using re-placement parts with higher ratings (rated power andwithstand voltage) does not necessarily guarantee thatsafety performance will be preserved. Parts with safe

13、typroperties are indicated as shown below on the wiring dia-grams and parts lists is this service manual. Be sure to re-place them with parts with the designated part number.(1) Schematic diagrams . Indicated by the z mark.(2) Parts lists . Indicated by the z mark.Using parts other than the designat

14、edparts could result in electric shock, fires orother dangerous situations.SAFETY PRECAUTIONSThe following check should be performed for the continued protection of the customer and service technician.LEAKAGE CURRENT CHECKBefore returning the unit to the customer, make sure you make either (1) a lea

15、kage current check or (2) a line to chassisresistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of thepower cord is less than 460 kohms, the unit is defective.CAUTIONCAUTIONRadioFans.CN 收音机爱 好者资料库3AVR-1908 / AVR-788、点検時注意願。注意事項守！特注意必要個所、 部品

16、、 捺印注意事項表示。 注意書取扱説明書注意事項必守。感電注意！(1) 、交流電圧印加通電時内部金属部触感電。従通電時、絶縁使用手袋着用、部品交換、電源抜感電注意。(2) 内部高電圧部分、通電時取扱十分注意。分解、組立作業時注意！板金部品端面、部品製造時充分管理、 板金端面鋭利箇所有、 部品端面触指動怪我場合十分注意作業下。 手保護手袋着用。指定部品使用！部品難燃性耐電圧安全上特性持。 従交換部品、 使用同特性部品使用。特配線図、 部品表 z 印指定安全上重要部品必指定使用。部品取付配線引、 元！安全上、絶縁材料使用、基板浮取付部品。 内部配線引発熱部品高圧部品接近配慮、 必元。後安全点検！取

17、外、 部品、 配線元、 個所周辺劣化点検、 外部金属端子部、 電源刃間絶縁、安全性確保確認。（絶縁方法）電源電源抜、 外、電源入。500V 絶縁抵抗計用、 電源端子外部露出金属部端子、端子、端子、入力端子間、絶縁抵抗値 M 以上確認。 値以下点検修理必要。安全上重要部品本機使用多電気部品、 機構部品安全上、 特別特性持。 特性場合、 外観判別、 部品高定格（定格電力、耐圧）持使用安全性維持、 限。 安全上特性持部品、 配線図、 部品表表示必指定部品番号使用願。(1) 配線図 z 表示。(2) 部品表 z 表示。指定部品異使用場合、感電、火災危険生恐。注意注意4AVR-1908 / AVR-78

18、8DIMENSION AVR-1908 model 344.0434.016.0155.0171.026.554.7214.5335.2382.921.25AVR-1908 / AVR-788 AVR-788 model20.754.7214.5335.2377.121.2344.0434.016.0155.0171.06AVR-1908 / AVR-788CAUTION IN SERVICINGInitializing AV SURROUND RECEIVER/AM-PLIFIERAV SURROUND RECEIVER/AMPLIFIER initialization should be

19、performed when the com, peripheral parts of com, and Digital P.W.B. are replaced.1. Switch off the unit.2. Hold the following SPEAKERS-A button and SPEAKERS-B button, and switch on the unit.3. Check that the entire display is flashing with an interval of about 1 second, and release your fingers from

20、 the 2 but-tons and the microprocessor will be initialized.Note:If step 3 does not work, start over from step 1. All user settings will be lost and this factory setting will be recovered when this initialization mode.So make sure to memorize your setting for restor-ing after the initialization.JIG t

21、o use for servicingWhen you repair the printing board, you can use the following JIG (Extention cable kit). Please order to Denon Official Ser-vice Distributor in your region if necessary.00D SPK- 561 EXTENSION UNIT KIT: 1 Set00D SPK- 562 9120 CONN. JOINT KIT : 1 SetWhen you update the firmware, you

22、 can use the following JIG (RS232C to internal connector conversion adapter with 8P cable kit ). Please order to Denon Official Service Distrib-utor in your region if necessary.00DSPK-581 WRITING UNIT: 1 Set時注意事項AV / 初期化周辺部品、Digital 基板等交換場合、AV / 初期化行下。1.on/off OFF 。2.SPEAKERS-A SPEAKERS-B 同時押、on/off

23、 押 ON 。3.表示約 1 秒間隔点滅確認後、2 指離。初期化。注意 :上記 3 状態場合、一度操作 1直。初期化行客様設定内容工場出荷状態戻、設定内容控初期化後再設定。時使用治具基板修理際、使用治具 ( 延長）下記。必要応販社注文下。00D SPK- 561 EXTENSION UNIT KIT: 1 式00D SPK- 562 9120 CONN. JOINT KIT: 1 式際、使用治具（RS232C - 製品内部 変換基板 +8P ) 下記。必要応販社注文。00DSPK-581 WRITING UNIT: 1 式1,22,3The illustration is AVR-1908.s

24、s7AVR-1908 / AVR-788DISASSEMBLY Disassemble in order of the arrow of the figure of following flow.下記図矢印順番。 In the case of the re-assembling, assemble it in order of the reverse of the following flow.再組立場合、下記逆順番組立 In the case of the re-assembling, observe attention of assembling it.再組立場合、 組立注意遵守。CABI

25、NET TOPPANEL FRONT ASSYCHASSIS BACK ASSYTRANSRefer to DISASSEMBLY 1.PANEL FRONT ASSYRefer to DISASSEMBLY 2.CHASSIS BACK ASSYRefer to DISASSEMBLY 6.TRANSand EXPLODED VIEWand EXPLODED VIEWand EXPLODED VIEW 9 : POWER SW ASSY55 : SPEAKER ASSY10 : FUNCTION ASSY71 : TUNER PACK11 : FRONT ASSY14 : HEAD PHON

26、E ASSYCPU ASSY21 : V. AUX ASSYRefer to DISASSEMBLY 3.HDMI PWB ASSY22 : MIC ASSYand DISASSEMBLY 4.CPU ASSYand EXPLODED VIEW51 : CPU PWB ASSY52 : INPUT PWB ASSY53 : VIDEO PWB ASSY54 : HDMI PWB ASSYCHASSIS MAIN ASSYRefer to DISASSEMBLY 5.CHASSIS MAIN ASSYand EXPLODED VIEW33 : 2CH PWB ASSY50 : MAIN PWB

27、ASSY56 : POWER SUPPLY PWB ASSY57 : POWER PWB ASSY8AVR-1908 / AVR-788Picture CPicture APicture DPicture BPicture G( Bottom view )Picture HThe viewpoint of each photograph(photography direction)各図視点（撮影方向） Top view Picture JPicture IPicture EPicture FWire clamp bandCord holder Top view 9AVR-1908 / AVR-

28、7881. PANEL FRONT ASSY(1) Remove the screws. ( 。 ）(2) Disconnect the connector wires and remove the screws . ( 。 ）Proceeding ( 手順 ) : CABINET TOP PANEL FRONT ASSY Picture A Top view Picture G Bottom view Picture ICord holderCP302CP105Picture CWire clamp bandCP503CUTPicture EWire clamp bandCord holde

29、rCP541CUTFFC cableCord holderPicture D10AVR-1908 / AVR-7882.CHASSIS BACK ASSY(1) Disconnect the connector wires and unscrew a screw. ( 。 ）Picture FCP306Cord holderPlease refer to EXPLODED VIEW for the disassembly method of each P.W.B included in panel front assy.Panel front assy 各基板 EXPLODED VIEW 参照

30、。Proceeding ( 手順 ) : CABINET TOPCHASSIS BACK ASSY CP103CP101CP103CP102FFC cableWire clamp bandCord holderCUTPicture EPicture BCord bushAC cordPlease refer to EXPLODED VIEW for the disassembly method of each P.W.B included in Chassis back assy.Chassis back assy 各基板 EXPLODED VIEW 参照。11AVR-1908 / AVR-7

31、883.CPU ASSY(1) Disconnect the connector wires and screw. ( 。 ）4. CHASSIS MAIN ASSYProceeding ( 手順 ) : CABINET TOP CHASSIS BACK ASSY CPU ASSYPicture JCP1001FFC cableCP704CP705FFC cablePicture ECP704CP514CP705Please refer to EXPLODED VIEW for the disassembly method of each P.W.B included in CPU assy.

32、CPU assy 各基板 EXPLODED VIEW 参照。proceeding ( 手順 ) : CABINET TOP CHASSIS BACK ASSY CPU ASSY CHASSIS MAIN ASSY Please refer to EXPLODED VIEW for the disassembly method of each P.W.B included in chassis main assy.Chassis main assy 各基板 EXPLODED VIEW 参照。12AVR-1908 / AVR-7885. TRANS(1) Disconnect the connec

33、tor wires and remove the screws.（。 ）Proceeding ( 手順 ) : CABINET TOPTRANSWire clamp bandCord holderCP104CP402CP402CP302CP105CUTPicture EPlease refer to EXPLODED VIEW for the disassembly method of Trans.Trans EXPLODED VIEW 参照。13AVR-1908 / AVR-788CHECK WITH TEST MODEcom/DSP Error Display Mode1. Operati

34、on Speccom version display mode:When the following conditions are satisfied at its starting state, error information is displayed before version information.Starting method (same as com version display): E3,EUT,E1C modelWhile pressing 2 buttons, STATUS and DIMMER, turn on on/off button.Then, press S

35、TATUS button to display the following information on the FL Display. E2,E2A modelWhile pressing 2 buttons, RT and PTY, turn on on/off button.Then, press RT button to display the following information on the FL Display.2. Display OrderError information Destination information Main-com version informa

36、tion Sub-com version information DSP version information3. DisplayAny one of the following list is displayed, in the priority of .Condition State DisplaySub-com NGNo response from Sub-com DIR NGNo response from DIR DSP1 NGWhen DSP boot, executing DSP reset makes no change to BUSY port L. 1 No change

37、 to BUSY port L before issuing DSP command. 1 When DSP data read, executing WRITE=L makes no change to ACK=H. 1 When DSP data read, executing REQ=L makes no change to ACK=L. 1 When DSP data write, executing WRITE=H makes no change to ACK=H. 1 When DSP data write, executing REQ=L makes no change to A

38、CK=L. 1 When DSP special code boot, executing DSP reset makes no change to BUSY port L. 1 No change to BUSY port L before issuing DSP special read command. 1 No change to BUSY port L before DSP version read. 1 Both SUB/DSP OK (No error display, version display only)on/off buttonSTATUSDIMMERE3,EUT,E1

39、C modelon/off buttonRTPTYE2,E2A model14AVR-1908 / AVR-788方法DSP 表示1. 動作仕様表示 :起動状態下記条件該当場合、情報表示前情報表示。起動方法 ( 表示同様 ): E3,EUT,E1C STATUS, DIMMER 2 押状態、on/off 押電源入。後、STATUS 押下表内容 FL Display 表示。 E2,E2A RT, PTY 2 押状態、on/off 押電源入。後、RT 押下表内容 FL Display 表示。2. 表示順序情報 仕向地表示 情報 情報 DSP 情報3. 表示条件下表表示。表示優先順、 。条件状態表示

40、内容 SUB NGSUB 応答 DIR NG DIR 応答 DSP 1 NGDSP 時、DSP 実行 BUSY L 1 DSP 発行前、BUSY L 1 DSP 時、WRITE=L ACK=H 1 DSP 時、REQ=L ACK=L 1 DSP 時、WRITE=H ACK=H 1 DSP 時、REQ=L ACK=L 1 DSP 時、DSP 実行BUSY L 1 DSP 発行前、BUSY L 1 DSP 前、BUSY L 1 SUB/DSP 共 OK ( 表示表示行 )on/off buttonSTATUSDIMMERE3,EUT,E1C modelon/off buttonRTPTYE2,E2

41、A model15AVR-1908 / AVR-788ADJUSTMENTAudio SectionIdling CurrentRequired measurement equipment: DC Voltmeter1. Preparation(1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature 15 C 30 C (59 F 86 F).(2) Presetting POWER (Power source switch)O

42、FF SPEAKER (Speaker terminal)No load(Do not connect speaker, dummy resistor, etc.)2. Adjustment(1) Remove top cover and set VR101 FL, FR, C, SL, SR, on Main Amp. Unit, VR401, VR402 on 2ch- Amp. Unit at fully counterclockwise ( ) position.(2) Connect DC Voltmeter to test points (FRONT-Lch: TP101, FRO

43、NT-Rch: TP105, CENTER ch: TP103, SURROUND-Lch: TP102, SURROUND-Rch: TP104, SURROUND-BACK Lch: TP401, SURROUND-BACK Rch: TP402).(3) Connect power cord to AC Line, and turn power switch ON.(4) Presetting.MASTER VOLUME: - counterclockwise ( min.)SPEAKER (Speaker terminal) : No load (Do not connect spea

44、ker, dummy resistor, etc.)MODE: 7CH STEREOFUNCTION: CD(5) Within 2 minutes after the power on, turn VR101 clock-wise ( ) to adjust the TEST POINT voltage to 1.5 mV 0.5 mV DC.(6) After 10 minutes from the preset above, turn VR101 to set the voltage to 2.0 mV 0.5 mV DC.(7) Adjust the Variable Resistor

45、s of other channels in the same way.VR101SRTP104VR101FLTP101TP102VR101SLTP402VR402TP103VR101CVR101FRTP105F LchS LchS Back RchTP401VR401S Back LchC chS RchF RchDC VoltmeterMAIN AMP. UNIT2CH AMP. UNIT調整電流調整調整必要測定器 :DC Voltmeter1. 準備(1) 、扇風機風通良場所避、通常使用状態置。周囲温度 15 30 、湿度常湿。(2) 電源OFF端子無負荷( 抵抗器接続。)2. 調整(1

46、) 上、基板 VR101 FL, FR, C, SL, SR 及 2ch- 基板 VR401,VR402 反時計方向 ( ) 回切状態。(2) (FRONT-Lch: TP101, FRONT- Rch: TP105, CENTER ch: TP103, SURROUND-Lch: TP102, SURROUND-Rch: TP104, SURROUND-BACK Lch: TP401, SURROUND-BACK Rch: TP402) DC Voltmeter 接続。(3) 電源 AC100V（95 105V 範囲可）接続、電源 ON 。(4) ON 後、次。MASTER VOLUME（音

47、量調節）反時計方向( ) 回、最小状態。SPEAKER（端子）無負荷（、抵抗器接続。 ）MODE : 7CH STEREOFUNCTION : CD(5) 2 分以内 VR101 時計方向 ( ) 回電圧次調整。1.5mV 0.5mV DC(6) 予備調整 10 分後 VR101 回、次電圧設定。2.0mV 0.5mV DC(7) 同方法各可変抵抗調整。16AVR-1908 / AVR-788-MEMO-17AVR-1908 / AVR-788TROUBLE SHOOTING1. POWER1.1. Power not turn on1.2. Fuse is blownPower not tu

48、rn onIs the ON/STANDBY indicator on the front panel flashing red?NOAre there any incomplete con-nections in the connectors con-necting between the variouscircuit boards?NOIs there a short circuit betweenthe speaker terminals and theground?NOCorrect the short circuitbetween the speaker and theground.

49、YESYESYESConnect the connectors prop-erly.Check for damage in the poweramplifier circuitry parts andreplace any defective parts.Is the fuse blown?NORefer to 1.2.Fuse is blownYESDoes the power turn on whenthe POWER switch is turned offthen back on?NOIs a DC 6V voltage being sup-plied from the POWER B

50、d(CN505 pins 3 and 4) to themicroprocessor?NOIs a DC 6V voltage output whenthe cord supplying the powerfrom the SUPPLY Bd to themicroprocessor (CN511) isunplugged?NOCheck the parts from IC807 tothe primary circuitry andreplace any defective parts.YESYESYESCheck the primary circuitryparts including t