Bose-151-Service-Manual 电路图 维修手册.pdf

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1、Service Manual SPECIFICATIONS 200 Bose Corporation Transducer:Cabinet: 1-4.5 (11.4 cm) full-range,Black or white high-impact molded environmental driver polypropylene Nominal Impedance:Speaker Dimensions: 4 Ohms6.1H x 9.1W x 5.9 D (15.4 H x 23.0 W x 15.0 D cm) IEC Power Rating:Shipping Weight Min: 1

2、0 Watts Per Channel4.0 lbs. (1.8 kg) Per Speaker Max: 40 Watts Per Channel Model 151 and 111 ENVIRONMENTAL SPEAKER SYSTEM RadioFans.CN 收音机爱 好者资料库 Test Procedures NOTES: In each test procedure, it is necessary to remove the grille to access the driver. Refer to the Grille Removal procedure. Polaritie

3、s are not marked on the input terminals of the 151 speaker. The red terminal is the positive (+) terminal and the black terminal is the negative (-) terminal. See Figure 1. 1. Rub and Tick Test A. Connect a sine wave oscillator to a power amplifier. Adjust the frequency of the oscillator to 10 Hz an

4、d the amplifier output to 6 Vrms. Connect the amplifier output to the input terminals of the 151 speaker (see Figure 1). No extraneous noises such as rubbing, scraping or ticking should be heard. NOTE: To distinguish between normal suspension noise and rubs or ticks, displace the cone on the driver

5、slightly with your fingers. If the noise can be made to go away or get worse, it is a rub or a tick and the driver should be replaced. If the noise stays the same, it is normal suspension noise and the driver is fine. Suspension noises will not be heard with program material. 2. Sweep Test A. Sweep

6、the oscillator from 10 Hz to 3 kHz using the 6 Vrms signal. There should not be any loud extraneous sounds. (Note: A whooshing noise from the port at approximately 80 Hz is acceptable). If there are any loud buzzes or distortion, replace the driver. (See Disassembly/Assembly Procedures for instructi

7、ons on replacing the driver). NOTE: There should not be any buzzes or rattles from within the speaker cabinet. Redress any wire or component that buzzes. B. Reduce the amplifier output to 3 Vrms and continue sweeping from 3 kHz to 15 kHz. If there is any buzzing or distorting,replace the driver (see

8、 Disassembly/Assembly Procedures for instructions on replacing the driver). 1 RadioFans.CN 收音机爱 好者资料库 3. Air Leak Test A. Using the 6 Vrms signal,set the oscillator frequency to 10 Hz. Block the ports. For at least 3 seconds, listen for air leaks around the driver and baffle. If there is a whooshing

9、 noise around the driver, re-position the driver gasket behind the driver to make an airtight seal. If there are similar noises around the baffle, make sure that it is securely fastened to the speaker cabinet. 4. Phase Test NOTE: Supply voltage should only be momentarily applied to the speaker input

10、 terminals to avoid possible damage to the speaker. A. Set a DC power supply to 10 volts. To ensure that the driver is connected in phase, connect the positive lead of the supply to the positive (+) speaker input terminal and the negative lead to the negative (-) input terminal. The driver should mo

11、ve outwards with the application of the supply voltage. 2 Figure 1. Test Connections 151 Speaker +- Audio Signal Generator Power Amplifier InputOutput Speaker - + -+ Red (+) Black (-) RadioFans.CN 收音机爱 好者资料库 Disassembly/Assembly Procedures NOTE: Refer to Figure 2 for an exploded view of the speaker

12、assembly. Certain parts will be referred to in these procedures. The item number which corresponds to the part will be enclosed in parentheses-i.e.-grille (1). 1. Grille Removal NOTE: The grille is made entirely of metal. Do not try to remove the grille by pulling on the plastic (polypropylene) spea

13、ker enclosure. A. Insert the tip of a scribe or nail through one of the perforations in the grille (1). Hint: Insert at one of the corners. Carefully work the grille out of the retaining slot. 2. Grille Replacement A. To install the grille (1), make sure that it is oriented as shown in Figure 2. B.

14、Align the grille to the speaker enclosure and push in lightly. 3. Driver Removal A. Remove 3 screws (4) which secure the driver (3) to the speaker baffle (6). B. Carefully lift the driver out of the enclosure and cut the wires as close to the driver terminals as possible. 4. Driver Replacement A. St

15、rip the wires and connect to the replacement driver (3). Make sure that the red wire is connected to the positive (+) terminal and the black wire is connected to the negative (-) terminal of the driver. Make sure that the driver terminals are centered in the speaker enclosure. The correct orientatio

16、n is shown in Figure 2. B. The gasket (5) must also be correctly positioned behind the driver to provide an airtight seal. Secure the driver (3) to the baffle (6) with 3 screws (4). Repeat the driver test procedures. 3 4 5. Baffle Removal A. Remove 6 screws (4) that hold the baffle (6) in place. (Re

17、moving the driver is not necessary). Stick your fingers in the baffle ports and pull the baffle carefully away from the enclosure. It may take quite a bit of force to accomplish this task. 6. Baffle Replacement A. Align the port side of the baffle (6) to the side of the enclosure that has the input

18、terminals (9). The baffle will only fit one way. Secure the baffle to the enclosure with 6 screws (4). Repeat the air leak test. Figure 2. Speaker Assembly Exploded View 5 Figure 3. Packaging Exploded View 6 151 Speaker Assembly Parts List (Figure 2) 7 NOTE 1. This part is not normally available fro

19、m Customer Service. Approval from the Field Service Manager is required before ordering. 2. The nameplate is not easy to replace. If you need to replace the grille, you must also order a new name- plate. Re-attach the nameplate to the grille with an appropriate adhesive (i.e.-superglue) or by using

20、a soldering iron. CAUTION: If you use a soldering iron, CAREFULLY melt the nameplate posts against the grille. Do not melt down the posts too much or the nameplate will be ruined. Also, the nameplate should be secured so that it does not vibrate. Item Number DescriptionPart NumberQty. Per Speaker As

21、sy. See Note 1 Grille -Metal, Black 179129-1 1 2 Grille -Metal, Arctic White 179129-2 1 2 2 Nameplate-Logo, Black 171292-112 Nameplate-Logo, White 171292-212 3 Driver 257948-001 1 4 Screw-TAPP,8-11x3/4,PAN,XRC/SQ 173556-129 5 Gasket-Driver, 4.5 128407 1 6 Baffle-Black 131741-01A1 Baffle-White 131741

22、-01B1 7 Batting-Polyester 11608211 8 Threaded Insert 1239912 9 Connector-Terminal Strip 1712951 10 Screw-TAPP,6-13x.5,PAN,XREC/SQ 173555-082 151 Packaging Parts List (Figure 3) 8 Item Number DescriptionPart NumberQty. Per Carton See Note 1 Owners Manual 1712971 2 Card-Warranty, Universal 1492251 3 P

23、olybag (Literature Kit) 1033511 4 List-Warranty Service 1227661 5 Envelope-Warranty Registration 1230011 6 All Products Brochure 1414781 7 Express Music Catalog 1458911 8 Packing-Filler, Foam 1249212 9 Polybag (Speaker) 1238312 10 Carton 171298N/A SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE Bose Corporation The Mountain Framingham, Massachusetts USA 01701 FOR TECHNICAL ASSISTANCE PARTS ORDERING, CALL 800-233-4008 P/N 173445 6/93: REV.01