Bose-301-Serie-IV-Service-Manual 电路图 维修手册.pdf

《Bose-301-Serie-IV-Service-Manual 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Bose-301-Serie-IV-Service-Manual 电路图 维修手册.pdf（12页珍藏版）》请在收音机爱好者资料库上搜索。

1、Service Manual P/N 181850 REV 1 301 SERIES IV DIRECT/REFLECTING SPEAKER SYSTEM 1996 Bose Corporation RadioFans.CN 收音机爱 好者资料库 PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODU

2、CT BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE RE- PRODUCED OR USED FOR ANY OTHER PURPOSE. 1 Table Of Contents BOSE 301 SERIES IV TECHNICAL DESCRIPTION . 2 SPECIFICATIONS . 2 DISASSEMBLY/ASSEMBLY PROCEDURES . 3 1. Grille Removal. 3 2. Woofer Removal/Replacemen

3、t . 3 3. 3 Tweeter Removal/Replacement. 3 4. 2 Tweeter Removal/Replacement . 3 5. Remounting the Grille .4 TEST PROCEDURES. 5 1. Woofer Rub and Tick Test . 5 2. Woofer Sweep Test . 5 3. Tweeter Sweep Test. 5 4. Air Leak Test . 5 5. Woofer Phase Test . 5 6. Tweeter Phase Test. 6 7. Crossover Testing

4、. 6 Figure 3: 301 Series IV Main Assembly Drawing . 7 Figure 4: 301 Series IV Packaging Parts Drawing . 8 TABLES 301 Series IV Main Assembly Parts List . 9 301 Series IV Crossover Parts List . 10 301 Series IV Main Packaging Parts List . 10 RadioFans.CN 收音机爱 好者资料库 BOSE 301 SERIES IV TECHNICAL DESCRI

5、PTION The BOSE 301 Series IV speaker is a replacement for the 301 Series III and 4.2 Series II speakers. It is a passive, two-piece (mirror image stereo pair) home loudspeaker in a bookshelf configuration. The 301 Series IV is designed for use with standard amplifiers, receivers and other related ho

6、me audio components. The 301 Series IV speaker utilizes separate inward and outward firing tweeters to achieve consistent stereo imaging over a broad listening area (Stereo Everywhere performance), while maintaining a spacious sound stage. Asethetically, the 301 Series IV speaker features molded pla

7、stic right and left side caps mounted to a vinyl covered, particle board enclosure. This construction eliminates the use of edge- banding, and maintains differentation with competitors due to horizontal placement on the bookshelf. The sum of all these unique features makes the 301 Series IV speaker

8、capable of reproducing the wide dynamic range demanded by todays advanced recordings without strain or loss of clarity. SPECIFICATIONS 2 Speaker Compliment:One 8 (20 cm) woofer One 3 (7.6 cm) tweeter One 2 (5.08 cm) tweeter Nominal Impedance:8 Ohms IEC Power Rating:Min: 10 Watts per channel Max: 75

9、Watts per channel Cabinet:All Black, all Warm Gray or Rosewood finish w/Black End Caps Shipping Weight:27.7 lbs. (12.6 kg) per pair Speaker Dimensions:10.25H x 16.38W x 9.5D RadioFans.CN 收音机爱 好者资料库 DISASSEMBLY/ASSEMBLY PROCEDURES Note: Refer to Figure 3 for the following proce- dures. 1. Grille Remo

10、val: Both the front grille (1) and the side grille (3) are held in place by a snap-fit and are easily removed by hand. To remove, CAREFULLY pull the grille away from the speaker. 2. Woofer Removal/Replacement: 2.1 Remove the front grille as indicated in Proce- dure 1. 2.2 Remove the 4 screws (11) ho

11、lding the woofer (9) in place. 2.3 Lift the woofer out and cut the wires connected to the woofer terminals as close to the terminals as possible. 2.4 Strip the wires and connect to the replacement woofer. Make sure that the Red wire is con- nected to the positive (+) terminal, both Black wires are c

12、onnected to the negative (-) terminal and both Yellow wires are connected to the woofers dummy terminal, (no solder joint at this terminal). Dress or twist wires to prevent buzzing. 2.5 Remount the woofer to the cabinet using the four screws. 3. 3 Tweeter Removal/Replacement: In order to remove the

13、tweeter it will first be necessary to remove the woofer from the enclosure. Note: The positive terminal of the tweeter is marked with a Red dot. 3.1 Remove both the front and side grilles as indicated in Procedure 1. 3.2 Remove the 4 screws that secure the woofer to the enclosure and lift the woofer

14、 away from its opening. 3.3 Remove the #8-32 screw (6) from the back of the gasket backed tweeter (4) and separate the tweeter from the molded bracket portion of the endcap. 3.4 Cut the wires connected to the tweeter as close to the tweeter terminals as possible. 3.5 Strip the wires and connect the

15、replacement tweeter. Make sure the Yellow wire is con- nected to the positive (+) terminal and the Black wire is connected to the negative terminal (-). 3.6 Remount the tweeter using the #8-32 screw. 3.7 Remount the woofer using the four #8-11 screws. 4. 2 Tweeter Removal/Replacement: In order to re

16、move the tweeter it will first be necessary to remove the woofer from the enclosure. Note: The positive terminal of the tweeter is marked with a Red dot. 4.1 Remove the front grille only, as indicated in Procedure 1. 4.2 Remove the 4 screws that secure the woofer to the enclosure and lift the woofer

17、 away from its opening. 4.3 Remove the #8-32 screw from the back of the gasket backed tweeter (12) and separate the tweeter from the molded bracket portion of the endcap. 4.4 Cut the Yellow wire and the lamp lead con- nected to the tweeter as close to the tweeter terminals as possible. 4.5 Strip the

18、 Yellow wire and connect the replace- ment tweeter. Make sure the Yellow wire is connected to the negative (-) terminal and the lamp is connected to the positive terminal (+). Note: To replace just the lamp or both the tweeter and lamp it will be necessary to remove the tweeter by following procedur

19、es outlined in section 4. 3 4 4.6 Remount the tweeter using the #8-32 screw. 4.7 Remount the woofer using the four #8-11 screws. 5. Remounting the Grilles: Both side and front grilles can only be mounted one way. 5.1 Side Grille: Align the feet with the fast-on grommets. Press in lightly until the g

20、rille feet are fully inserted into the grommets and the snap is engaged. 5.2 Front Grille: Align the feet with the four mount- ing holes on the end caps and press the grille in lightly until the snaps are engaged. 5 TEST PROCEDURES Note: Before performing any tests, remove both grilles by following

21、the grille removal instructions in the disassembly section of this manual. 1. Woofer Rub and Tick Test: Connect the output of a signal generator to the input of a power amplifier. Connect the output of the power amplifier to the input terminals of the speaker under test, (see Figure 1). Adjust the f

22、requency of the generator to 45 Hz and the amplifier output to 8 Vrms. No extraneous noises such as rubbing, scraping or ticking should be heard. Note: To distinguish between normal suspen- sion noise and rubs or ticks, slightly displace the cone of the woofer with your fingers. If the noise can be

23、made to go away or get worse, it is a rub or tick and the woofer should be re- placed. If the noise stays the same, it is normal suspension noise and the woofer is fine. Sus- pension noises will not be heard with program material. 2. Woofer Sweep Test: Sweep the signal genera- tor from 10 Hz to 5 kH

24、z using the 8 Vrms signal. There should be no loud extraneous sounds. If there are any loud buzzes or distortion, replace the woofer. Test Connections, 301 Series IV Speaker FIGURE 1 +- Audio Signal Generator Power Amplifier InputOutput Back of Speaker Under Test - + RIGHT Red ( + )Black ( - ) Note:

25、 There should not be any buzzes or rattles from within the speaker cabinet. Re- dress any wire or component that buzzes. 3. Tweeter Sweep Test: Reduce the amplifier output to 3 Vrms and continue sweeping from 5 kHz to 15 kHz. Replace either of the tweeters in which buzzing or distortion occurs. 4. A

26、ir Leak Test: Using an 8 Vrms signal, set the generator frequency to 45 Hz. Listen for air leaks around the woofer, tweeters and cabinet seams (glue joints). Any air leaks will be heard as a sputtering or hissing sound. The repair of air leaks can be made by repositioning the transducer gaskets. 5.

27、Woofer Phase Test: Note: In this test, supply voltage should only be momentarily applied to the speaker input terminals to avoid possible damage to the speaker. Set a DC power supply to 8 volts. To ensure that the woofer is connected in phase, connect the positive lead of the supply to the positive

28、(+) speaker input terminal and the negative lead to the negative (-) input terminal. The woofer should move outwards with the application of the supply voltage. FIGURE 2 Schematic Diagram This ensures that the woofer and speaker input terminals are wired in phase, (see Schematic Diagram, Figure 2).

29、6. Tweeter Phase Test: Remove 4 screws and lift the woofer carefully away from the speaker cabinet in order to access the terminal cup. Check the wiring on the terminal cup and on both sets of tweeter terminals against the schematic in Figure 2. This ensures that both tweeters are wired in phase. Cr

30、ossover Measurements Note: Due to the inaccessibility of the tweeters, it may be necessary to remove the tweeters from their respective endcaps. Refer to the Disassembly Procedures on replacing tweeters and for separating the tweeters from the endcaps. 7. Crossover Testing: The crossover is tested b

31、y measuring the voltage across a 10 , 5 watt resistor in series with the loudspeaker. See Figure 2 and the following Table. If output voltage is not within the limits shown, check connections and component values for C1, C2, and RT1. 6 C1 RT1 + - + - + - C2 YEL 2 TWEETER 8 WOOFER 3 TWEETER BLK YEL R

32、ED BLK Z ( + ) Y ( - ) 10 W 7 FIGURE 3: 301 Series IV Main Assembly Drawing 4 5 3 6 7 8 9 10 B 12 11 6 RT1 A C1 See Detail A for Logo? Variations and Placement 2 1 2 Detail A? Logo Variations & Placement? ( Left Speaker Shown ) C2 Note: Exploded view of end caps is to show? relative location of cros

33、sover components as? well as the tweeters and is not intended to? represent a serviceable part. 8 FIGURE 4: 301 Series IV Packaging Parts Drawing 9 10 8 8 123 456 7 9 301 Series IV Main Assembly Parts List (Figure 3) Item Number DescriptionPart NumberQty. Per Speaker Reference 1Grille Assembly, Fron

34、t: Brown/Grey or Black 181851-01 181851-00 1 1 2Nameplate, Logo: Large or Small 122812-0 185208-01 1 1 3Grille Assembly, Side: Dark Brown or Black 181856-01 181856-00 1 1 4 Tweeter, 3 Gasket Backed 266161 1 11/4/2002 5Grommet, Grille Socket1760682 6Screw, Machine, 8-32 x .375, HexW, Hex121441-062 7B

35、atting, Polyester, 12 x 21160821See Note 8Gasket, Woofer, 8187395-2081 9 Woofer Assembly, 8 181870-001 1 10Connector, Barrier, 2 Position1818651 11Screw, Tapp, 8-11 x .75, Pan172672-124 12 Tweeter, 2, Gasket Backed 181862-S P 1 10/1/2002 Note: This item is not normally stocked as a service part. 10

36、301 Series IV Crossover Parts List (Figure 3) 301 Series IV Main Packaging Parts List (Figure 4) Item Number DescriptionPart NumberQty. Per Carton Reference 1Owners Manual1818691 2List, Warranty Service Stations1227661 3Card, Info, Warranty, Multi Language1814601 4Card, Info, Warranty, U.S.1813571 5

37、Brochure, All Products1414781 6Bumper, Foot, Adhesive Backed, 8-ct173012-081 7Polybag, 14.38 x 9.87 x 2 mil1033511 8Packing, Corner Post Set1818672 9Polybag, 13.5 x 35 x 9.5 x 2.5, 5 mil1145222 10Carton, RSC181868-011 Symbol or Item Number DescriptionPart NumberQty. Per Speaker Assy. See Note C1Capa

38、citor, 4.5uF, 50V, 10%, Elect.1314281 C2Capacitor, 22uF, 50V, 10%, Elect.18495611 RT1Lamp, Green dot1419891 AConnector, Terminal, Wirewrap18186412 BTape, Foil10359732 Notes: 1.C2 is mounted to the surface of the woofer basket using foam tape P/N 118223. 2.This part is not normally stocked as a service part. SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE Bose Corporation The Mountain Framingham, Massachusetts USA 01701 P/N 181850 7/96 REV. 1 FOR TECHNICAL ASSISTANCE AND PARTS ORDERING, CALL 800-367-4008