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1、SERVICE MANUAL MODELAVR-2307CI AVR-2307 AVC-1930 AVR-887 AV SURROUND RECEIVER AV SURROUND AMPLIFIER For U.S.A.,Canada,Europe, Asia,Taiwan R.O.C.,China & Japan model TOKYO, JAPAN X0305 V.01 DE/CDM 0608 Some illustrations using in this service manual are slightly different from the actual set. Please
2、use this service manual with referring to the operating instructions without fail. For purposes of improvement, specifications and design are subject to change without notice. 本文中使用、説明都合上現物 多少異場合。 修理際、必取扱説明書参照上、作業行 。 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 。
3、 補修用性能部品保有期間、製造打切後8年。 注意 Denon Brand Company, D&M Holdings Inc. Ver. 1 RadioFans.CN 2 AVR-2307CI / AVR-2307 / AVR-887 / AVC-1930 Please heed the points listed below during servicing and inspection. Heed the cautions! Spots requiring particular attention when servicing, such as the cabinet, parts, ch
4、assis, etc., have cautions indicated on labels or seals. Be sure to heed these cautions and the cau- tions indicated in the handling instructions. Caution concerning electric shock! (1) An AC voltage is impressed on this set, so touching inter- nal metal parts when the set is energized could cause e
5、lectric shock. Take care to avoid electric shock, by for ex- ample using an isolating transformer and gloves when servicing while the set is energized, unplugging the power cord when replacing parts, etc. (2)There are high voltage parts inside. Handle with extra care when the set is energized. Cauti
6、on concerning disassembly and assembly! Though great care is taken when 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 p
7、arts have specific safety properties (fire resis- tance, voltage resistance, etc.). For replacement parts, be sure to use parts which have the same properties. In particu- lar, for the important safety parts that are marked ! on wiring diagrams and parts lists, be sure to use the designated parts. B
8、e sure to mount parts and arrange the wires as they were originally! For safety reasons, some parts use tape, tubes or other insu- lating 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 us
9、ed to keep wires away from heating and high voltage parts, so be sure 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 posi- tions, inspect that no part
10、s around the area that has been serviced have been negatively affected, conduct an insulation 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, disconn
11、ect the antenna, plugs, etc., and turn the power switch on. Using a 500V insulation resistance tester, check that the insulation re- sistance between the terminals of the power plug and the ex- ternally exposed metal parts (antenna terminal, headphones terminal, microphone terminal, input terminal,
12、etc.) is 1M or greater. If it is less, the set must be inspected 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 properties are difficult to distinguish by sight, and using replacement parts
13、 with higher ratings (rated power and withstand voltage) does not necessarily guarantee that safety performance will be pre- served. Parts with safety properties are indicated as shown below on the wiring diagrams and parts lists is this service manual. Be sure to replace them with parts with the de
14、signat- ed part number. (1) Schematic diagrams . Indicated by the ! mark. (2) Parts lists . Indicated by the ! 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 con
15、tinued protection of the customer and service technician. 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
16、to either side of the power cord is less than 460 kohms, the unit is defective. CAUTION CAUTION 、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。
17、 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 ! 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、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 ! 表示。 (2) 部品表 ! 表示。 指定部品異使用場合 、感電、火災危険生恐 。 注意 注意 RadioFans.CN 3 AVR-2307CI / AVR-2307 / AVR-887 / AVC-1930 DIMENSION RadioFans.CN 4 AVR-2307CI / AVR-2307 / AVR-887 / AVC-1930 CAUTION IN SERVICING Initializ
19、ing AV SURROUND RECEIVER AV SURROUND RECEIVER initialization should be performed when the com, peripheral parts of com, and Digital P.W.B. are replaced. 1. Switch off the unit. 2. Hold the following SPEAKER A button and SPEAKER B but- ton, and switch on the unit. 3. Check that the entire display is
20、flashing with an interval of about 1 second, and release your fingers from the 2 buttons 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
21、sure to memorize your setting for restoring after the initialization. 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. OFF 。 2.SPEAKER A SPEAKER B 同時押 、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。 RadioFans.CN 5 AVR-2307CI / AVR-2307 / AVR-887 / AVC-19
22、30 ADJUSTMENT (AVR-2307CI,887,2307 Model) Audio Section Idling Current Required measurement equipment: DC Voltmeter 1. 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 sourc
23、e switch)OFF SPEAKER (Speaker terminal)No load (Do not connect speaker, dummy resistor, etc.) 2. Adjustment (1) Remove top cover and set VR101, VR102, VR103, VR104, VR105, on Main Amp. Unit, VR106, VR107 on 2ch-Amp. Unit at fully counterclockwise ( ) position. (2) Connect DC Voltmeter to test points
24、 (FRONT-Lch: TP104, FRONT-Rch: TP105, CENTER ch: TP103, SUR- ROUND-Lch: TP101, SURROUND-Rch: TP102, SUR- ROUND-BACK Lch: TP107, SURROUND-BACK Rch: TP106). (3) Connect power cord to AC Line, and turn power switch ON. (4) Presetting. MASTER VOLUME: - counterclockwise ( min.) MODE: 7CH STEREO FUNCTION:
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