Bose-1800V-pwr-sup2维修电路原理图.pdf

《Bose-1800V-pwr-sup2维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Bose-1800V-pwr-sup2维修电路原理图.pdf（79页珍藏版）》请在收音机爱好者资料库上搜索。

1、1 PROPRIETARY INFORMATIONTHIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OFBOSE CORPORATION WHICH IS BEING FURNISHED ONLY FORTHE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCTBY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THEBOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USEDFOR ANY OTHER PURPOSE.C

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

3、ard Ground EQ Curve .7Disassembly/Assembly Procedures .8Figure 4. Screw Location .8Figure 5. EQ Card Placement.8Test Set up Procedures .9Test Procedures . 10-17Part List Notes.18EQ Card PCB Part Numbers and Product Codes.18402 Series ? Electrical Part List. 19-20402 Series ? Electrical Part List . 2

4、1-22802 Series ? Electrical Part List . 23-24802 Series ? Electrical Part List. 25-26502A Electrical Part List . 27-28502B Electrical Part List . 29-30502BEX Electrical Part List . 31-32Model 1B Electrical Part List. 33-35Model 8 Electrical Part List . 36-37Model 25/32 Electrical Part List. 38-39Fre

5、espace 360 In Ground Electrical Part List. 40-42FreeSpace 360 Surface Electrical Part List . 43-44Panaray 3202 ? Electrical Part List . 45-47Panaray 4402 ? Electrical Part List . 48-50Panaray 9702 ? Electrical Part List . 51-53Panaray LT ? Electrical Part List. 54-55RadioFans.CN 收音机爱 好者资料库2Contents

6、(continued)CAUTION: THE EQ PCB ASSEMBLIES CONTAIN NO USER-SERVICEABLE PARTS. TOPREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICESTATIONS OR FACTORY SERVICE.Packaging Part List.56Figure 6. Packaging Exploded View.56Figure 7. Bottom Side PCB Part Number 184844.57Figure 8. Top Side PCB

7、Part Number 184844.57Figure 9. Bottom Side PCB Part Number 178860.58Figure 10. Top Side PCB Part Number 178860.58Figure 11. Bottom Side PCB Part Number 190675.59Figure 12. Top Side PCB Part Number 190675.59Figure 13. Bottom Side PCB Part Number 183071.60Figure 14. Top Side PCB Part Number 183071.60F

8、igure 15. 402 Series ? Schematic Diagram .61Figure 16. 402 Series ? Schematic Diagram .62Figure 17. 802 Series ? Schematic Diagram .63Figure 18. 802 Series ? Schematic Diagram.64Figure 19. 502A Schematic Diagram.65Figure 20. 502B Schematic Diagram .66Figure 21. 502BEX Schematic Diagram .67Figure 22.

9、 Model 1B Schematic Diagram.68Figure 23. Model 8 Schematic Diagram .69Figure 24. Model 25/32 Schematic Diagram .70Figure 25. FreeSpace 360 Surface Schematic Diagram .71Figure 26. FreeSpace 360 In Ground Schematic Diagram .72Figure 27. Panaray 3202 LT ? Schematic Diagram .73Figure 28. Panaray 4402 LT

10、 ? Schematic Diagram.74Figure 29. Panaray 9702 LT ? Schematic Diagram.75Figure 30. Panaray LT ? Schematic Diagram .76RadioFans.CN 收音机爱 好者资料库3 1. Parts that have special safety characteristics are identified by the symbol on schematics or by special notes on the parts list. Use only replacement parts

11、 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 to the customer. Refer to Paragraph 84 of UL 1270. Use the following chec

12、ks toperform these measurements:A. Leakage Current Hot Check-With the unit completely reassembled, plugthe AC line cord directly into a 120V AC outlet. (Do not use an isolationtransformer during this test.) Use a leakage current tester or a meteringsystem that complies with American National Standar

13、ds 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 theOFF position, measure from a known earth ground (metal water pipe,conduit, etc.) to all exposed metal parts of the unit (antennas, hand

14、le bracket,metal cabinet, screwheads, metallic overlays, control shafts, etc.), especiallyany exposed metal parts that offer an electrical return path to the chassis.Any current measured must not exceed 0.5 milliamp. Reverse the unit powercord plug in the outlet and repeat test. ANY MEASUREMENTS NOT

15、 WITHINTHE 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 andconnect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of t

16、he unit. (3) Measure the resistance with an ohmmeter be-tween the jumpered AC plug and each exposed metallic cabinet part on theunit. When the exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the rea

17、ding 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 INFORMATION4ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)This unit contains ESDS devices. We recommend

18、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 station or heel straps that connect to conductive floormats. Avoid touching the leads or contacts of ESDS devices or PC board

19、s even if properlygrounded. 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 materials such as plastic, polystyrene foam, clear plastic bags, bubble wrapor plastic trays.DEVICE HANDLINGThis supplement sho

20、uld be used along with either the 1800? service manual part number181812 or the 1600 ?/1800 ? service manual part number 199747. The disassembly/assem-bly procedures, and packing part list should be used along with the information in this manual.The test procedures were included in this manual for y

21、our convenience.This supplement replaces the following supplements: 181812-S2, 181812-S3, 181812-S6and 181812-S7.SUPPLEMENT DESCRIPTION5These Equalizer cards are designed to be installed into the AmPlus 50 and 100 amplifiersand the Bose 1600 Series ? and 1800 Series ? amplifiers. The EQ cards includ

22、ed in thisservice 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, 9702, andFreeSpace 360 Surface and In Ground.The FreeSpace 360 loudspeaker requires equalization, and this equalization is a function of

23、 theinstallation. There are two variants of the card that implement EQ curves for theseinstallation situations: In Ground (when the FreeSpace 360 loudspeaker is 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

24、position, the Soft Ground EQ is used; when S1 is in the HARDposition, the Hard Ground EQ is used. In the Surface variant, S1 is omitted and jumpered to the SURFACE position.Note: Refer to the FreeSpace 360 Surface or In-Ground schematic diagrams, as appropriate,for the following explanation. The des

25、ignators inside the brackets are the schematic gridcoordinates which are provided in order to make it easier to locate components on theschematic sheet indicated in the description. Components shown on the schematic asOPT (optional) are not used in that particular configuration. Also refer to the EQ

26、 curves onpage 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 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 paramet

27、ricis set for -15dB at 27 Hz and provides a steep slope below about 80 Hz The equalization issegmented, with one block (U2 and U1), all sections D1-8 dedicated to bass region equaliza-tion. Following the output of this section, U2-A D1, the signal is presented to two parallelequalization paths, one

28、comprised of U3 B4-7, U4-B C3, and dedicated to EQ for mounting insoft ground of the FreeSpace 360 loudspeaker. The other path, comprised of U5 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

29、 leg of the equalizer card is notused.THEORY OF OPERATIONThe operation of all three equalizers is similar. Considering the bass equalizer, we see U2-BsD7 output passed through R8 D7 and into the non-inverting input of U2-A D2. This input isextended as a bus to which EQ sections Bass 1 D6 and Bass 2

30、D5 are connected. Thesewill introduce dips into the audio response to provide bass cut as required. Sections Bass 3D4 and Bass 4 D3 are connected to a bus extended from the inverting input of U2-A D2and provide bass boost. See Figures 1,2 and 3 for the EQ curves for the various equalizercards.Each o

31、f the EQ sections utilizes a gyrator-connected op-amp in conjunction with a seriescapacitance to simulate an LCR series tuned circuit. The values of the capacitors and resistorsare chosen to implement EQ dips and/or peaks at the appropriate frequency, amplitude and Qto realize the desired EQ curves.

32、 On the In-Ground EQ card, S1 B2 selects either the HARDor the SOFT mount EQ curve.The output signal is taken from JP1 pin 5, and returns to the amplifier. The equalizer cards aresensed by the amplifiers as follows. In the AmPlus 50 and 100 amplifiers, Pin 12 of J1 B2 isgrounded and is sensed by the

33、 dynamic EQ circuit on sheet 2 of the AmPlus 50 and 100schematic diagrams. In the 1600/1800 amplifiers, the input module detects the presence of EQcards via J7-6 and J6-6. Without the card installed these pins are pulled high (+15V). This logichigh signal is also applied to the control pins of the s

34、witch ICs which selects the A(unequalized) input. When an EQ is plugged into J7 and/or J6 pin 6, the EQ is detected andpulls the control pin low (+7.5V), turning on the corresponding LED(s) and switching the IC tothe B input which will then select the output of the EQ card to be passed on to the amp

35、lifier.6THEORY OF OPERATIONThe Model 1B EQ card is intended for use in the AmPlus 50 and 100 amplifiers as well as the1800 ?, 1600 and 1800 ? professional amplifiers. It accepts a full range (50 Hz to 16 kHz)signal, equalizes it, and passes a full range signal back to the main amplifier signal path.

36、Refer to the FreeSpace Model 1B EQ card schematic diagram, sheet 1 of 1 for the followinginformation.Note: The designators inside the brackets “ ” are the schematic grid coordinates which areprovided in order to make it easier to locate components on the schematic sheet indicated inthe description.T

37、he equalization is segmented, with one block (U2 and U1, all sections D1-8) dedicated tobass region equalization for the Model 1B Bass module. Following the output of this section,U2A D1, the signal is presented to two parallel equalization paths, one comprised of U3 B4-7, U4A 4-7, U4B C3, and dedic

38、ated to EQ for surface mounted Bose FreeSpace Systemsatellite speakers (Model 25 and 32). The other path, comprised of U5 B4-7, U4A B3 pro-vides equalization for Bose Model 8 flush-mount satellite speakers.The operation of all three equalizers is similar. Considering the bass equalizer, we see U2BsD

39、7 output passed through R8 D7 and the non-inverting input of U2A D2. This input isextended as a bus to which EQ sections bass 1 D6 and Bass 2 D5 are connected. Thesewill introduce dips into the audio response. Section Bass 3 D4 is connected to a potentiometerstraddling U2A non-inverting and invertin

40、g inputs. When the wiper is moved toward the non-inverting input, the section introduces a dip; when moved toward the inverting input, a peak.Each of the EQ sections utilizes a gyrator-connected op amp in conjunction with a seriescapacitor to simulate an LCR series tuned circuit. The values of the c

41、apacitors and resistorsare chosen to implement EQ curves. Each EQ section has optional steering resistors thatcould allow other curves to be implemented in the future with the same card. There are alsosome spare sections not currently used.S1 B2 selects either the FLUSH or the SURFACE mount EQ curve

42、, while potentiometer R33D1 provides a boost/cut range of adjustment of the 90 Hz bass region.7EQUALIZER CARD CURVE DIAGRAMSFigure 1. FreeSpace 360 Surface EQ CurveFigure 2. FreeSpace 360 In-Ground Soft Ground EQ CurveFigure 3. FreeSpace 360 In-Ground Hard Ground EQ Curve8DISASSEMBLY/ASSEMBLY PROCED

43、URES1. Input Panel Removal1.1 Remove the two screws (see figure 4)holding the panel assembly to the chassis.1.2 Slide the input panel assembly out ofthe chassis to access the EQ cards.2. Input Panel Replacement2.1 Slide the input panel assembly back intothe chassis (see figure 5. for proper align-me

44、nt).2.2 Secure the input panel to the chassisusing the two screws that had been re-moved in procedure 1.1.3. EQ Card PlacementNote: Refer to figure 5. for EQ Card place-ment.3.1 Perform procedure 1.3.2 Place the EQ card into the channel 1 or2 connector. The connector can be insertedin only one direc

45、tion.3.3 Perform procedure 2.Figure 4. Screw LocationFigure 5. EQ Card Placement9TEST SET UP PROCEDURES1. Install the equalizer card under test into one of the equalizer card jacks located on the inputmodule of the Bose 1600 or 1800 series amplifier. Refer to the disassembly/assembly proce-dures on

46、the previous page.2. On the amplifier input module, place switch SW1 to the NORM position. Place switch S2 tothe FULL BANDWIDTH position.3. The input voltage shall be the actual input voltage present at the input, not the open circuitgenerator input.10TEST PROCEDURES3202 ? EQ Frequency Response4402

47、? EQ Frequency Response9702 ? EQ Frequency ResponseLT ? System EQ Frequency Response1. Panaray Series ? EQ PCB 3202,4402, 9702,LT Frequency Response Test1.1 Apply a 100 mVrms, 700 Hz signal tothe input jack of the amplifier channel undertest.1.2 Adjust the amplifier volume controls tomaximum and ref

48、erence a dB meter to theoutput. No EQ card installed.1.3 Shut off the amplifier. Open the inputpanel and switch the high frequency/fullrange switch (S2) to the full range position.Insert the EQ card.1.4 Turn on the amplifier and measure theresponse according to the gain chart listedbelow.1.5 Referen

49、ce a dB meter to the output afterstep 1.4 and measure the response of theEQ card according to the correspondingchart on this page.EQ Gain ResponseFrequencyOutput Level50 Hz-23 dB 3 dB100 Hz-2.4 dB 1.5 dB180 Hz+5.2 dB 2 dB550 Hz-1.5 dB 1 dB700 Hz0 dBReference1.1 kHz+2.3 dB 1 dB1.8 kHz+3.8 dB 1 dB3 kH

50、z+4.8 dB 1 dB6.5 kHz+4.5 dB 1.5 dB11.5 kHz+3.8 dB 1.5 dB30 kHz-22 dB 3 dBFrequencyOutput Level50 Hz-27.4 dB 3 dB150 Hz-2.2 dB 1.5 dB250 Hz 1.7 dB 1.5 dB500 Hz-0.9 dB 1.5 dB700 Hz0 dBReference1 kHz 1.3 dB 1.5 dB2 kHz-0.3 dB 1 dB3 kHz 0.6 dB 1 dB7 kHz-1.5 dB 1.5 dB13 kHz0 dB 1.5 dB30 kHz-26 dB 3 dBFre