Bose-1800V-pwr-sup2 电路图 维修手册.pdf

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1、1 PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR THE PURPOSE 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 PUR

2、POSE. Contents Safety Information .3 Electrostatic Discharge Sensitive (ESDS) Device Handling.4 Supplement Description.4 Theory of Operation . 5-6 Equalizer Card Curve Diagrams.7 Figure 1. FreeSpace 360 Surface EQ Curve .7 Figure 2. FreeSpace 360 In-Ground Soft Ground EQ Curve.7 Figure 3. FreeSpace

3、360 In-Ground Hard Ground EQ Curve .7 Disassembly/Assembly Procedures .8 Figure 4. Screw Location .8 Figure 5. EQ Card Placement.8 Test Set up Procedures .9 Test Procedures . 10-17 Part List Notes.18 EQ Card PCB Part Numbers and Product Codes.18 402 Series ? Electrical Part List. 19-20 402 Series ?

4、Electrical Part List . 21-22 802 Series ? Electrical Part List . 23-24 802 Series ? Electrical Part List. 25-26 502A Electrical Part List . 27-28 502B Electrical Part List . 29-30 502BEX Electrical Part List . 31-32 Model 1B Electrical Part List. 33-35 Model 8 Electrical Part List . 36-37 Model 25/3

5、2 Electrical Part List. 38-39 Freespace 360 In Ground Electrical Part List. 40-42 FreeSpace 360 Surface Electrical Part List . 43-44 Panaray 3202 ? Electrical Part List . 45-47 Panaray 4402 ? Electrical Part List . 48-50 Panaray 9702 ? Electrical Part List . 51-53 Panaray LT ? Electrical Part List.

6、54-55 RadioFans.CN 收音机爱 好者资料库 2 Contents (continued) CAUTION: THE EQ PCB ASSEMBLIES CONTAIN NO USER-SERVICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE. Packaging Part List.56 Figure 6. Packaging Exploded View.56 Figure 7. Bottom Side P

7、CB Part Number 184844.57 Figure 8. Top Side PCB Part Number 184844.57 Figure 9. Bottom Side PCB Part Number 178860.58 Figure 10. Top Side PCB Part Number 178860.58 Figure 11. Bottom Side PCB Part Number 190675.59 Figure 12. Top Side PCB Part Number 190675.59 Figure 13. Bottom Side PCB Part Number 18

8、3071.60 Figure 14. Top Side PCB Part Number 183071.60 Figure 15. 402 Series ? Schematic Diagram .61 Figure 16. 402 Series ? Schematic Diagram .62 Figure 17. 802 Series ? Schematic Diagram .63 Figure 18. 802 Series ? Schematic Diagram.64 Figure 19. 502A Schematic Diagram.65 Figure 20. 502B Schematic

9、Diagram .66 Figure 21. 502BEX Schematic Diagram .67 Figure 22. Model 1B Schematic Diagram.68 Figure 23. Model 8 Schematic Diagram .69 Figure 24. Model 25/32 Schematic Diagram .70 Figure 25. FreeSpace 360 Surface Schematic Diagram .71 Figure 26. FreeSpace 360 In Ground Schematic Diagram .72 Figure 27

10、. Panaray 3202 LT ? Schematic Diagram .73 Figure 28. Panaray 4402 LT ? Schematic Diagram.74 Figure 29. Panaray 9702 LT ? Schematic Diagram.75 Figure 30. Panaray LT ? Schematic Diagram .76 RadioFans.CN 收音机爱 好者资料库 3 1. Parts that have special safety characteristics are identified by the symbol on sche

11、matics or by special notes on the parts list. Use only replacement parts that have critical characteristics recommended by the manufacturer. 2. Make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit before returning the unit t

12、o the customer. Refer to Paragraph 84 of UL 1270. Use the following checks to perform these measurements: A. Leakage Current Hot Check-With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leakage cur

13、rent tester or a metering system that complies with American National Standards Institute (ANSI) C101.1 “Leakage Current for Appliances” and Underwriters Laboratories (UL) 1492 (71). With the unit AC switch first in the ON position, then in the OFF position, measure from a known earth ground (metal

14、water pipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milliamp.

15、 Reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZ- ARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER. B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and con

16、nect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure the resistance with an ohmmeter be- tween the jumpered AC plug and each exposed metallic cabinet part on the unit. When the exposed metallic part has a return path to the chassis, the reading

17、 should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be “infinite”. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and re- checked before it is returned to the customer. SAFETY INFORMA

18、TION RadioFans.CN 收音机爱 好者资料库 4 ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) This unit contains ESDS devices. We recommend the following precautions when repairing, replacing, or transporting ESDS devices: Perform work at an electrically grounded work station. Wear wrist straps that connect to the statio

19、n or heel straps that connect to conductive floor mats. Avoid touching the leads or contacts of ESDS devices or PC boards even if properly grounded. Handle boards by the edges only. Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unpro- tected devices into mater

20、ials such as plastic, polystyrene foam, clear plastic bags, bubble wrap or plastic trays. DEVICE HANDLING This supplement should be used along with either the 1800? service manual part number 181812 or the 1600 ?/1800 ? service manual part number 199747. The disassembly/assem- bly procedures, and pa

21、cking part list should be used along with the information in this manual. The test procedures were included in this manual for your convenience. This supplement replaces the following supplements: 181812-S2, 181812-S3, 181812-S6 and 181812-S7. SUPPLEMENT DESCRIPTION 5 These Equalizer cards are desig

22、ned to be installed into the AmPlus 50 and 100 amplifiers and the Bose 1600 Series ? and 1800 Series ? amplifiers. The EQ cards included in this service manual are as follows; 402 series ? and ?, 502A, 502B, 502BEX, 802 series ? and ?, Model 1B, Model 8, Model 25/32, Panaray LT series ? 3202, 4402,

23、9702, and FreeSpace 360 Surface and In Ground. The FreeSpace 360 loudspeaker requires equalization, and this equalization is a function of the installation. There are two variants of the card that implement EQ curves for these installation situations: In Ground (when the FreeSpace 360 loudspeaker is

24、 mounted in the ground). The appropriate EQ curve for soft or hard ground is selected with a slide switch on the card. When S1 is in the SOFT position, the Soft Ground EQ is used; when S1 is in the HARD position, the Hard Ground EQ is used. In the Surface variant, S1 is omitted and jumpered to the S

25、URFACE position. Note: Refer to the FreeSpace 360 Surface or In-Ground schematic diagrams, as appropriate, for the following explanation. The designators inside the brackets are the schematic grid coordinates which are provided in order to make it easier to locate components on the schematic sheet i

26、ndicated in the description. Components shown on the schematic as OPT (optional) are not used in that particular configuration. Also refer to the EQ curves on page 7 of this manual for an overview of the frequency response of each of the 360 applica- tions. The input signal is applied to these cards

27、 at JP1 pin 4. The first section at the input, U2-B D7, combines a first order high-pass filter with one section of a parametric cut filter. The parametric is set for -15dB at 27 Hz and provides a steep slope below about 80 Hz The equalization is segmented, with one block (U2 and U1), all sections D

28、1-8 dedicated to bass region equaliza- tion. Following the output of this section, U2-A D1, the signal is presented to two parallel equalization paths, one comprised of U3 B4-7, U4-B C3, and dedicated to EQ for mounting in soft ground of the FreeSpace 360 loudspeaker. The other path, comprised of U5

29、 B4-7, U4-A B3 provides equalization for the FreeSpace 360 loudspeaker in hard ground installa- tions. In the case of the FreeSpace Surface EQ card, the bottom leg of the equalizer card is not used. THEORY OF OPERATION The operation of all three equalizers is similar. Considering the bass equalizer,

30、 we see U2-Bs D7 output passed through R8 D7 and into the non-inverting input of U2-A D2. This input is extended as a bus to which EQ sections Bass 1 D6 and Bass 2 D5 are connected. These will introduce dips into the audio response to provide bass cut as required. Sections Bass 3 D4 and Bass 4 D3 ar

31、e connected to a bus extended from the inverting input of U2-A D2 and provide bass boost. See Figures 1,2 and 3 for the EQ curves for the various equalizer cards. Each of the EQ sections utilizes a gyrator-connected op-amp in conjunction with a series capacitance to simulate an LCR series tuned circ

32、uit. The values of the capacitors and resistors are chosen to implement EQ dips and/or peaks at the appropriate frequency, amplitude and Q to realize the desired EQ curves. On the In-Ground EQ card, S1 B2 selects either the HARD or the SOFT mount EQ curve. The output signal is taken from JP1 pin 5, and returns to the amplifier. The equalizer cards are sensed by the amplifiers as follows. In the AmPlus 50 and 100 amplifiers, Pin 12 of J1 B2 is grounded and is sensed by the dynamic EQ circuit on sheet 2 of the AmPlus 50 and 100 schematic diagrams. In the