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 th

2、e actual 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 0802 SERVICE MANUAL AV SURROUND RECEIVER MODELJPE3E2EKE2AE1CEUT AVR-1908 ? AVR-788 ? ? Ver. 3 Please refer to the MOD

3、IFICATION NOTICE. RadioFans.CN 收音机爱 好者资料库 2 AVR-1908 / AVR-788 Please heed the points listed below during servicing and inspection. Heed the cautions! Spots requiring particular attention when servicing, such as the cabinet, parts, chassis, etc., have cautions indicated on labels or seals. Be sure t

4、o heed these cautions and the cautions 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 could cause electric shock. Take care to avoid electric shock, by for example usi

5、ng an isolating transformer and gloves when servicing while the set is energized, un- plugging the power cord when replacing parts, etc. (2)There are high voltage parts inside. Handle with extra care when the set is energized. Caution concerning disassembly and assembly! Though great care is taken w

6、hen manufacturing parts from sheet metal, there may in some rare cases be burrs on the edges of parts which could cause injury if fingers are moved across them. Use gloves to protect your hands. Only use designated parts! The sets parts have specific safety properties (fire resis- tance, voltage res

7、istance, etc.). For replacement parts, be sure to use parts which have the same properties. In par- ticular, for the important safety parts that are marked z on wiring diagrams and parts lists, be sure to use the desig- nated parts. Be sure to mount parts and arrange the wires as they were originall

8、y! For safety reasons, some parts use tape, tubes or other in- sulating materials, and some parts are mounted away from the surface of printed circuit boards. Care is also taken with the positions of the wires inside and clamps are used to keep wires away from heating and high voltage parts, so be s

9、ure to set everything back as it was originally. Inspect for safety 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 been serviced have been negatively affe

10、cted, conduct an insu- lation check on the external metal 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 turn the power switch on. Us-

11、ing a 500V insulation resistance tester, check that the in- sulation resistance between the terminals of the power plug and the externally exposed metal parts (antenna ter- minal, headphones terminal, microphone terminal, input terminal, etc.) is 1M or greater. If it is less, the set must be inspect

12、ed and repaired. Concerning important safety parts Many of the electric and structural parts used in the set have 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 and withstand voltage) d

13、oes not necessarily guarantee that safety performance will be preserved. Parts with safety properties 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

14、 by the z mark. (2) Parts lists . Indicated by the z mark. Using parts other than the designated parts could result in electric shock, fires or other dangerous situations. SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician.

15、LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make 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, t

16、he unit is defective. CAUTION CAUTION RadioFans.CN 收音机爱 好者资料库 3 AVR-1908 / AVR-788 、点検時注意願。 注意事項守！ 特注意必要個所 、 部品、 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。

17、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

18、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 4 AVR-1908 / AVR-788 DIMENSION AVR-1908 model 344.0 434.0 16.0155.0 171.0 26.554.7214.5 335.2 382.9 21.2 5 AVR-1908 / AVR-788 AVR-788 model 20.754.7 21

19、4.5 335.2 377.1 21.2 344.0 434.0 16.0155.0 171.0 6 AVR-1908 / AVR-788 CAUTION IN SERVICING Initializing AV SURROUND RECEIVER/AM- PLIFIER AV SURROUND RECEIVER/AMPLIFIER initialization should be performed when the com, peripheral parts of com, and Digital P.W.B. are replaced. 1. Switch off the unit. 2

20、. 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 the 2 but- tons and the microprocessor will be initialized. Note:If step 3 does not work, start over f

21、rom 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 to use for servicing When you repair the printing board, you can use the following JIG (Extention c

22、able kit). Please order to Denon Official Ser- vice Distributor in your region if necessary. 00D SPK- 561 EXTENSION UNIT KIT: 1 Set 00D SPK- 562 9120 CONN. JOINT KIT : 1 Set When you update the firmware, you can use the following JIG (RS232C to internal connector conversion adapter with 8P cable kit

23、 ). 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 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

24、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 1,22,3 The illustration is AVR-1908. s s 7 AVR-1908 / AVR-788 DISASSEMBLY Disassemble in order of th

25、e 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。 CABINET TOP PANEL FRONT ASSYCHASSIS BACK ASSYTRANS Refer t

26、o DISASSEMBLY 1.PANEL FRONT ASSYRefer to DISASSEMBLY 2.CHASSIS BACK ASSYRefer to DISASSEMBLY 6.TRANS and EXPLODED VIEWand EXPLODED VIEWand EXPLODED VIEW 9 : POWER SW ASSY55 : SPEAKER ASSY 10 : FUNCTION ASSY71 : TUNER PACK 11 : FRONT ASSY 14 : HEAD PHONE ASSYCPU ASSY 21 : V. AUX ASSYRefer to DISASSEM

27、BLY 3.HDMI PWB ASSY 22 : MIC ASSYand DISASSEMBLY 4.CPU ASSY and EXPLODED VIEW 51 : CPU PWB ASSY 52 : INPUT PWB ASSY 53 : VIDEO PWB ASSY 54 : HDMI PWB ASSY CHASSIS MAIN ASSY Refer to DISASSEMBLY 5.CHASSIS MAIN ASSY and EXPLODED VIEW 33 : 2CH PWB ASSY 50 : MAIN PWB ASSY 56 : POWER SUPPLY PWB ASSY 57 :

28、 POWER PWB ASSY 8 AVR-1908 / AVR-788 Picture C Picture A Picture D Picture B Picture G ( Bottom view ) Picture H The viewpoint of each photograph (photography direction) 各図視点（撮影方向） Top view Picture J Picture I Picture E Picture F Wire clamp band Cord holder Top view 9 AVR-1908 / AVR-788 1. PANEL FRO

29、NT 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 I Cord holder CP302 CP105 Picture C Wire clamp band CP503 CUT Picture E Wire clamp band Cord holder

30、CP541 CUT FFC cableCord holder Picture D 10 AVR-1908 / AVR-788 2.CHASSIS BACK ASSY (1) Disconnect the connector wires and unscrew a screw. ( 。 ） Picture F CP306Cord holder Please refer to EXPLODED VIEW for the disassembly method of each P.W.B included in panel front assy. Panel front assy 各基板 EXPLOD

31、ED VIEW 参照。 Proceeding ( 手順 ) : CABINET TOPCHASSIS BACK ASSY CP103CP101CP103 CP102 FFC cable Wire clamp band Cord holder CUT Picture E Picture B Cord bush AC cord Please 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

32、 参照。 11 AVR-1908 / AVR-788 3.CPU ASSY (1) Disconnect the connector wires and screw. ( 。 ） 4. CHASSIS MAIN ASSY Proceeding ( 手順 ) : CABINET TOP CHASSIS BACK ASSY CPU ASSY Picture J CP1001 FFC cable CP704 CP705FFC cable Picture E CP704CP514 CP705 Please refer to EXPLODED VIEW for the disassembly metho

33、d of each P.W.B included in CPU assy. 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。 12 AVR-1908

34、/ AVR-788 5. TRANS (1) Disconnect the connector wires and remove the screws.（。 ） Proceeding ( 手順 ) : CABINET TOPTRANS Wire clamp band Cord holder CP104 CP402 CP402CP302 CP105 CUT Picture E Please refer to EXPLODED VIEW for the disassembly method of Trans. Trans EXPLODED VIEW 参照。 13 AVR-1908 / AVR-78

35、8 CHECK WITH TEST MODE com/DSP Error Display Mode 1. Operation Spec com 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 model While pressing 2

36、 buttons, STATUS and DIMMER, turn on on/off button. Then, press STATUS button to display the following information on the FL Display. E2,E2A model While 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 Ord

37、er Error information Destination information Main-com version information Sub-com version information DSP version information 3. Display Any one of the following list is displayed, in the priority of . Condition State Display Sub-com NG No response from Sub-com DIR NG No response from DIR DSP1 NG Wh

38、en DSP boot, executing DSP reset makes no change to BUSY port L. 1 No change 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

39、change to ACK=H. 1 When DSP data write, executing REQ=L makes no change to ACK=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 O

40、K (No error display, version display only) on/off buttonSTATUSDIMMER E3,EUT,E1C model on/off buttonRTPTY E2,E2A model 14 AVR-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

41、/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、 。 条件状態表示内容 SUB NG SUB 応答 DIR NG DIR 応答 DSP 1 NG DSP 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

42、 前、BUSY L 1 SUB/DSP 共 OK ( 表示表示行 ) on/off buttonSTATUSDIMMER E3,EUT,E1C model on/off buttonRTPTY E2,E2A model 15 AVR-1908 / AVR-788 ADJUSTMENT Audio Section Idling Current Required measurement equipment: DC Voltmeter 1. Preparation (1) Avoid direct blow from an air conditioner or an electric fan, an

43、d adjust the unit at normal room temperature 15 C 30 C (59 F 86 F). (2) Presetting POWER (Power source switch)OFF 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 2c

44、h- Amp. Unit at fully counterclockwise ( ) position. (2) Connect DC Voltmeter to test points (FRONT-Lch: TP101, FRONT-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

45、ON. (4) Presetting. MASTER VOLUME: - counterclockwise ( min.) SPEAKER (Speaker terminal) : No load (Do not connect speaker, dummy resistor, etc.) MODE: 7CH STEREO FUNCTION: 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

46、) 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 Resistors of other channels in the same way. VR101SR TP104 VR101FL TP101 TP102 VR101SL TP402 VR402 TP103 VR101CVR101FR TP105 F LchS Lch S Back Rch TP401 VR401 S Back Lch C chS RchF Rc

47、h DC Voltmeter MAIN AMP. UNIT 2CH AMP. UNIT 調整 電流調整 調整必要測定器 :DC Voltmeter 1. 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) 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:

48、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 STEREO FUNCTION : 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。 16 AVR-1908 / AVR-788 -MEMO- 17 AVR-1908 / AVR-788 TROUBLE SHOOTING 1. POWER 1.1. Power not turn on 1.2. Fuse is blown Power not turn on Is the ON/STANDBY indicator on the front panel flashin