Bose-203-Service-Manual 电路图 维修手册.pdf

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1、 CAUTION: THE MODEL 203 LOUDSPEAKER CONTAINS NO USER-SERVICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE. PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR THE P

2、URPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE. CONTENTS Specifications.2 Disassembly/Assembly procedures.3-4 Test Procedures . 5 Figure 1. Model 203 Loudspeaker test setup d

3、iagram . 5 Figure 2. Model 203 Loudspeaker Crossover Assembly topside and etch layout diagram. 6 Figure 3. Model 203 Loudspeaker Driver wiring diagram . 6 Figure 4. Model 203 Loudspeaker Crossover Assembly schematic diagram . 7 Model 203 Loudspeaker Crossover Assembly part list (per figure 5). 8 Fig

4、ure 5. Model 203 Loudspeaker Crossover Assembly layout diagram . 8 Model 203 Loudspeaker part list (per figure 6) . 9 Figure 6. Model 203 Loudspeaker exploded view. 9 Model 203 Loudspeaker packing list (per figure 7).10 Figure 7. Model 203 Loudspeaker packing diagram . 10 Optional 70/100V Transforme

5、r Accessory part list and installation. 11 2 SPECIFICATIONS Model 203 Loudspeaker Versions:6, 100 Watt, (no transformer) 70/100V, 80Watt, (transformer accessory) Impedance:6 Nominal, 4.8 minimum from 20Hz to 20kHz. Frequency Range:60Hz to 16kHz, 3dB Beamwidth:Vertical: 132 Horizontal: 185 Port (each

6、 side):Flared slot port tuned to 60 Hz. Shading Network Assembly:10uF capacitor with 0.065 mH series inductor Internal Cabinet Volume:5.7 Liters (347 cu.in.) net External Dimensions:12.83L x 8.43D x 7.25H (32.6cm x 21.4cm x 18.42cm) Sensitivity (1W, 1m):83.8dB SPL (calculated), free field, per IEC-2

7、68-5 (for octave- band centered at 400Hz). Power Handling:100W (24.5 Vrms) continuous Weight:11.5 lb (5.2 kg) each Shipping Weight:25.5 lb (11.6 kg) per packed pair 3 Note: Refer to Figure 6 for the following procedures. 1. Grille removal 1.1 Using your fingers, grasp the grille (1) edge nearest the

8、 port slot and gently pull the grille away from the cabinet until it comes free. 1.2 Grasp the opposite edge of the grille and gently pull it away from the cabinet until it comes free as well. 2. Grille replacement 2.1 Orient the grille (1) so that the Bose logo (14) is aligned with the print on the

9、 rear of the cabinet. 2.2 Align the two grille posts on the curved grille edge with the cabinet post holes and press the grille edge in place. 2.3 Align the two grille posts at the opposite grille edge with the grille socket grommets (4) and press the grille in place. The grille should be neat and f

10、lush with the cabinet. 3. Driver removal 3.1 Remove the grille (1) using procedure 1. 3.2 Using a phillips-head screwdriver, remove the three screws (2) that secure the driver (3) to the speaker cabinet. 3.3 Using your fingers, grasp the plastic basket of the driver and pull gently. The driver shoul

11、d come free. 3.4 Note the driver wiring color code, and cut the wires as close to the terminals as possible. 4. Driver replacement 4.1 Observing polarity, solder the wires from the crossover assembly (5) to the driver (3) terminals. 4.2 Orient the driver correctly into the cabinet and secure it usin

12、g the screws (2) removed in procedure 3.2. 4.3 Replace the grille (1) using procedure 2. 5. Crossover Assembly removal 5.1 Remove the grille (1) and angled driver (3) using procedure 3. 5.2 Remove the batting material and retain it for replacement later. 5.3 Using a long shaft phillips-head screwdri

13、ver, remove the four screws that secure the crossover assembly (5) to the interior of the speaker cabinet. 5.4 Unsolder the driver and barrier connector (10) wires from the crossover assembly. Note: Refer to Figure 3. Model 203 Loudspeaker driver wiring diagram, for the following procedure. 6. Cross

14、over Assembly replacement 6.1 Solder the driver (3) and barrier connector (10) wires to the appropriate locations on the crossover assembly (5). 6.2 Secure the crossover assembly to the interior of the speaker cabinet in the previous location using the four screws removed in procedure 5.3. 6.3 Repla

15、ce the batting material removed in procedure 5.2. 6.4 Replace the driver and grille (1) using procedure 4. DISASSEMBLY/ASSEMBLY PROCEDURES 4 DISASSEMBLY/ASSEMBLY PROCEDURES (CONT.) 7. Barrier connector removal 7.1 On the rear of the loudspeaker, remove the two (11) screws that secure the barrier con

16、nector to the plate (9). 7.2 Grasp the barrier connector and pull it straight out away from the loudspeaker. It should come free. 7.3 Cut the wires as close to the terminals as possible. 7.4 Retain the barrier strip gasket (12) for replacement later. 8. Barrier connector replacement 8.1 Observing po

17、larity, solder the loudspeaker wires to the barrier connector (10) leads. 8.2 Slide the barrier connector into the speaker cabinet. Be sure it is oriented properly. 8.3 Secure the barrier connector to the speaker cabinet using the two (11) screws removed in procedure 7.1. 5 2.4 Replace the grille us

18、ing procedure 2. 3. Air leak test 3.1 Remove the grille using procedure 1. 3.2 Apply a 6Vrms, 60Hz signal to the input terminals on the rear of the speaker cabinet. Leave the speaker port open. 3.3 Test duration should be 5 seconds minimum. 3.4 Listen carefully for air leaks along all glue joints, a

19、t the binding post connector, and at both transducer mounting locations. Air leaks will be heard as a hissing or sputtering sound. All repairs must be hidden. 3.5 Replace the grille using procedure 2. 4. Power sweep test 4.1 Apply a 6Vrms, 10Hz signal to the input terminals on the rear of the speake

20、r cabinet. Leave the speaker port open. 4.2 Sweep the input frequency from 10Hz to 3 kHz. 4.3 Reduce the input voltage level to 4Vrms and sweep the oscillator from 3kHz to 5kHz. Note: The whooshing noise from the port at approximately 60Hz is acceptable. 4.4 Replace any transducer that has a buzzing

21、 noise. There shall not be any buzzes or rattles from the internal connecting wires or components. Redress any buzzing wires. Power Amplifier Frequency? Generator Loudspeaker +- +-+- + - -+ DMM Figure 1. Model 203 Loudspeaker test setup diagram Note: Refer to Figure 3. Model 203 driver wiring diagra

22、m for the following procedure. 1. Phase test 1.1 Remove the speaker grille using procedure 1. 1.2 Observing polarity, apply a +6Vdc level to the input terminals on the rear of the loudspeaker. The speaker drivers should both move outward. 1.3 Replace the grille using procedure 2. Note: Refer to Figu

23、re 1. Model 203 Loudspeaker test setup diagram, for the following tests. 2. Rub and tick test 2.1 Remove the grille using procedure 1. 2.2 Apply a 6 Vrms, 10 Hz signal to the input terminals on the rear of the speaker cabinet. 2.3 Listen carefully for any buzzes, rattles, or other extraneous noises

24、from the drivers or trim parts. Note: There is a normal suspension noise. To distinguish between a rub or a tick and suspension noise, displace the driver cone slightly with a finger. If the noise stays the same, it is suspension noise. TEST PROCEDURES 6 Figure 3. Model 203 Loudspeaker Driver wiring

25、 diagram Figure 2. Model 203 Loudspeaker Crossover Assembly topside and etch layout diagram BLUE BLACK GREEN YELLOW +- _ + + - BARRIER STRIP PCB DRIVER DRIVER RED 7 Figure 4. Model 203 Loudspeaker Crossover Assembly schematic diagram + TOTO DRIVER DRIVER +- (BLACK) + - IN IN FRONT ANGLE (BLUE)(BLUE)

26、 (YELLOW)(GREEN) 1 W6 PTC2 (0.4A,1.3 OHM) RXE040 1 W1 L1 65uH C1 10/50V DS2DS1 PTC1 (0.90A,0.5 OHM) RXE 090 1W51W41W21W3 (RED) 8 Model 203 Loudspeaker Crossover Assembly part list (per figure 5) Figure 5. Model 203 Loudspeaker Crossover Assembly layout diagram (2X) (4X) M M L1 PTC2 C1 DS1,? DS2 PTC1

27、 FOIL? TAPE 1 2 3 4 5 6 78910 1112 RED YELLOW BLUE BLACK GREEN BLUE Ref. Des. Item Number DescriptionPart NumberQty per Assy. C11Cap, El, BP, 85, 50V, 20%, 10 uF1383651 PTC22Polyswitch, 60V, 4mm191995-11 PTC13Polyswitch, 50V, 4mm191996-11 4Tape, Foil, w/liner1346361 DS1, DS2 5Lamp, 2.5A, 24Vdc, Mini

28、1178052 6PCB, Bare Board, 203 Crossover187226-0011 L17Inductor, 65 uH, .11 Ohm, Ferrite1897991 8Screw, Machine, 4-40 x1, Pan, Xrec103146-161 9Washer, Flat, .141, #5108258-051 10Nut, Hex, 4-40103234-4401 11Screw, Tapp, 8-11x.625, Pan, XRC/S172672-104 12Foot, .25X.50, Black174402-14 9 Model 203 Loudsp

29、eaker part list (per figure 6) Figure 6. Model 203 Loudspeaker exploded view TYPICAL INSERT ASSEMBLY DETAIL A (2X) (4X) DETAIL A (2X) (2X) (4X) (2X) (3X) (3X) 1 2 3 2 4 5 678 6 7 8 REF REF REF 678 9 10 11 12 2 13 14 Item Number DescriptionPart NumberQuantity per Assembly 1Grille, Left, Model 203, Pr

30、o Gray Arctic White 187223-011 187223-021 1 1 1Grille, Right, Model 203, Pro Gray Arctic White 187223-012 187223-022 1 1 2Screw, Tapp, 8-11x.75, Pan, Xrc/Sq172672-1210 3Driver Assembly, 4.5, Model 203187233-0012 4Grommet, Grille Socket1760684 5Crossover Assembly, 203187225-0011 6Insert, Threaded, Ex

31、t/Intl1216904 7Nut, Lock, Flange, M81216914 8Washer, Lock, .326, 5/16, Intl T121692-314 9Plate, Arctic White Pro Gray 190649-001 190649-003 1 1 10Connector, Barrier, 2 position124484-021 11Screw, Tapp, 6-32x.75, PAN, TORX122994-122 12Gasket, barrier strip, 1021284101 13Gasket, Plate1435541 14Namepla

32、te, Logo, clear/black132545-011 10 Model 203 Loudspeaker packing list (per figure 7) Figure 7. Model 203 Loudspeaker packing diagram (2X) (2X) (2X) (2X) 1 2 3 4 3 5 Item Number DescriptionPart NumberQuantity per Pair 1Manual, Owners, Model 2031919131 2Bracket, 203, Arctic White Pro Gray 190650-001 1

33、90650-003 2 2 3Packing, End Cap, 203187243-0012 4Bag,Poly, 13.5x33.5x13x3 mil1065952 5Carton, RSC, 300PM187242-0011 -Hardware Kit, Bracket1919531 Optional 70/100V transformer accessory part list and installation DescriptionProduct CodeNote CVT-2 Transformer, Pro Gray0197751 CVT-2 Transformer, Arctic

34、 White0197762 Notes:1. To be used with Model 203 pro gray variation only. 2. To be used with Model 203 artic white variation only. Transformer accessory installation Note: Refer to Figure 6 for the following procedure. 1.1 Remove the CVT-2 transformer and gasket from the packing carton. 1.2 On the b

35、ack of the Model 203 loud- speaker, remove the plate (9) with the barrier connector (10) by removing the four retaining screws (2). 1.3 Gently lift the plate away from the speaker cabinet. 1.4 Cut the wires as close to the barrier connector as possible. 1.5 Strip the wires exposing about 1/2” (1.7 c

36、m) of bare wire. 1.6 On the CVT-2 transformer, locate the three positive output leads. The white wire is the 19W lead, the green is the 38W lead and the blue is the 75W lead. Choose the positive output lead that best matches your systems power requirements. 1.7 Cut off the other two positive output

37、leads as they will not be required. 1.8 Place the transformer gasket on the back of the transformer housing. 1.9 Observing polarity, solder the two speaker leads to the two transformer leads. Be sure to insulate the connections with electrical tape. 1.10 After deciding which way you want the transfo

38、rmer housing to face, align the trans- former housing with the back of the speaker cabinet. 1.11 Secure the transformer housing to the speaker cabinet using the four screws removed in step 1.2. 1.12 Connect the leads to the 203 loud- speaker to the appropriate connections on the barrier strip. 11 MODEL 203 LOUDSPEAKER 1997 Bose Corporation Part Number 193625 Rev. 00 Service Manual SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE P/N 193625 REV. 00 08/97 FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-367-4008 Bose Corporation The Mountain Framingham, Massachusetts, USA 01701