Bose-1800V-pwr-sup7 电路图 维修手册.pdf

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1、1998 Bose Corporation Part Number 181812-S7 Rev. 00 Supplement FreeSpace 360 Surface and In-ground Loudspeaker EQ Cards RadioFans.CN 收音机爱 好者资料库 2 CONTENTS Electrostatic Discharge Sensitive (ESDS) Device Handling . 3 Supplement Description. 3 Warranty Information . 3 Theory of Operation. 4 Equalizer

2、Card Curve Diagrams . 5 Figure 1. FreeSpace 360 Surface EQ Curve. 5 Figure 2. FreeSpace 360 In-Ground Soft Ground EQ Curve . 5 Figure 3. FreeSpace 360 In-Ground Hard Ground EQ Curve. 5 Test Procedures . 6-7 Part List Notes. 8 FreeSpace 360 EQ Card Part List . 9-10 Packing List, FreeSpace 360 EQ card

3、 (see Figure 4). 11 Figure 4. FreeSpace 360 EQ Card Packing View. 11 Figure 5. FreeSpace 360 Equalizer Board Topside and Etch Layout Diagram. 12 Figure 6. FreeSpace 360 Equalizer Board SMD and Etch Layout Diagram . 12 CAUTION: The FreeSpace 360 Equalizer Cards contain no user serviceable parts. To p

4、revent warranty infractions, refer servicing to warranty service centers or factory service. 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

5、 CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE. RadioFans.CN 收音机爱 好者资料库 3 (ESDS) DEVICE HANDLING ELECTROSTATIC DISCHARGE SENSITIVE This unit contains ESDS devices. We recommend the following precautions when repairing, replacing, or transporting ESDS

6、devices: Perform work at an electrically grounded work station. Wear wrist straps that connect to the station 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

7、or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap, or plastic trays. SUPPLEMENT DESCRIPTION This supplement should be used along with the 1800V EQ PCB service manual part n

8、umber 181812-S2. The disassembly/assembly procedures, and packing part list should be used along with the information in this manual. The test procedures were included in this manual for your convenience. WARRANTY INFORMATION The FreeSpace Model 360 Loudspeaker Equalizer Cards are covered by a 5-yea

9、r transferable limited warranty. RadioFans.CN 收音机爱 好者资料库 4 THEORY OF OPERATION These Equalizer cards are designed to be installed into the AmPlus 50 and 100 amplifiers and the Bose 1600 Series VI and 1800 Series V/VI amplifiers. The FreeSpace 360 loudspeaker requires equalization, and this equalizat

10、ion 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 mounted in the ground). The appropriate EQ curve for soft or hard ground is selected with a slide switch on the card.

11、 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 SURFACE position. Note: Refer to the FreeSpace 360 Surface or In-Ground schematic diagrams, as appropriate, for the fol

12、lowing 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 indicated in the description. Components shown on the schematic as OPT (optional) are not used in that particular confi

13、guration. 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 parametric is set for -15dB at 27Hz and provides a steep slope below about 80Hz. The equalization is se

14、gmented, 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 parallel equalization paths, one comprised of U3 B4-7, U4-B C3, and dedicated to EQ for mounting in soft ground of the FreeSpa

15、ce 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 leg of the equalizer card is not used. The operation of all three equalizers is similar.

16、Considering the bass equalizer, 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. Sect

17、ions Bass 3 D4 and Bass 4 D3 are 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 si

18、mulate an LCR series tuned circuit. 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 s

19、ignal 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 1600/1800

20、amplifiers, the input module detects the presence of EQ cards via J7-6 and J6-6. Without the card installed these pins are pulled high (+15V). This logic high signal is also applied to the control pins of the switch ICs which selects the A (unequalized) input. When an EQ is plugged into J7 and/or J6

21、 pin 6, the EQ is detected and pulls the control pin low (+7.5V), turning on the corresponding LED(s) and switching the IC to the B input which will then select the output of the EQ card to be passed on to the amplifier. EQUALIZER CARD CURVE DIAGRAMS Figure 1. FreeSpace 360 Surface EQ Curve Figure 2

22、. FreeSpace 360 In-Ground Soft Ground EQ Curve Figure 3. FreeSpace 360 In-Ground Hard Ground EQ Curve 5 6 TEST PROCEDURES 1.7 Shut off the amplifier. Open the input panel and switch the Hard/Soft switch to the HARD position. 2. In Hard Ground Frequency Response Test 2.1 Apply a 100 mVrms, 1kHz signa

23、l to the input jack of the amplifier channel under test. 2.2 Adjust the amplifier volume controls to maximum. No EQ card installed. 2.3 Reference a dB meter to the output of the amplifier. 2.4 Shut off the amplifier and insert the EQ card according to the assembly procedure. 2.5 Turn on the amplifie

24、r and measure the gain. There should be a -2.1 1.0 dB change in gain at the output. 2.6 Reference a dB meter and measure the response according to the In Hard Ground Frequency Response chart. FreeSpace 360 In-Ground Loudspeaker Test Setup Parameters: 1. Install the Equalizer card under test into one

25、 of the Equalizer card jacks located on the Input Module of the Bose 1600 or 1800 Series amplifier, and perform the following tests. Refer to the 1800V service manual supplement part number 181812- S2 for more information. 2. On the amplifier Input Module, place switch SW1 to the NORM position. Plac

26、e switch S2 to the FULL BANDWIDTH position. 3. The input voltage shall be the actual input voltage present at the input, not the open circuit generator input. Note: Place the Hard/Soft switch S1 to the SOFT position for the following tests. 1. In Soft Ground Equalizer PCB Frequency Response Test 1.1

27、 Apply a 100 mVrms, 1kHz signal to the input jack of the amplifier channel under test. 1.2 Adjust the amplifier volume controls to maximum. No EQ card installed. 1.3 Reference a dB meter to the output of the amplifier. 1.4 Shut off the amplifier and insert the EQ card according to the assembly proce

28、dure. 1.5 Turn on the amplifier and measure the gain. There should be a 0.0 1.0 dB change in gain at the output. 1.6 Reference a dB meter and measure the response of the EQ card according to the In Soft Ground Frequency Response chart. In Soft Ground Frequency Response FrequencyOutput Level 30 Hz-10

29、.3 dB 1.5 dB 180 Hz+9.5 dB 1.5 dB 190 Hz+7.8 dB 1.5 dB 1000 HzReference 3000 Hz+8.1 dB 1.0 dB 4000 Hz+7.8 dB 1.0 dB 10000 Hz+16.4 dB 2.5 dB In Hard Ground Frequency Response FrequencyOutput Level 9 Hz+9.8 dB 1.5 dB 30 Hz-8.3 dB 1.5 dB 180 Hz+11.2 dB 1.0 dB 800 Hz+0.8 dB 1.0 dB 1000 HzReference 3000

30、Hz+8.1 dB 1.0 dB 4000 Hz+8.7 dB 1.0 dB 10000 Hz+18.2 dB 2.5 dB 7 1.6 Reference a dB meter and measure the response of the EQ card according to the Surface Frequency Response chart. 2. Distortion Test 2.1 Apply a 780 mVrms, 1 kHz signal to the input jack of the amplifier channel under test. 2.2 Measu

31、re the distortion level at the output of the amplifier. It should be 0.1% THD. TEST PROCEDURES 3. Distortion Test 3.1 Apply a 780 mVrms, 1 kHz signal to the input jack of the amplifier channel under test. 3.2 Measure the distortion level at the output of the amplifier. It should be 0.1% THD. FreeSpa

32、ce 360 Surface Loudspeaker Test Setup Parameters 1. Install the Equalizer card under test into one of the Equalizer card jacks located on the Input Module of the Bose 1600 or 1800 Series amplifier, and perform the following tests. Refer to the 1800V service manual supplement part number 181812- S2 f

33、or more information. 2. On the amplifier Input Module, place switch SW1 to the NORM position. Place switch S2 to the FULL BANDWIDTH position. 3. The input voltage shall be the actual input voltage present at the input, not the open circuit generator input. 1. Surface Equalizer PCB Frequency Response

34、 Test 1.1 Apply a 100 mVrms, 1kHz signal to the input jack of the amplifier channel under test. 1.2 Adjust the amplifier volume controls to maximum. No EQ card installed. 1.3 Reference a dB meter to the output of the amplifier. 1.4 Shut off the amplifier and insert the EQ card according to the assem

35、bly procedure. 1.5 Turn on the amplifier and measure the gain. There should be a +1.0 1.0 dB change in gain at the output. Surface Frequency Response FrequencyOutput Level 30 Hz-8.8 dB 1.5 dB 90 Hz+7.2 dB 1.5 dB 180 Hz+11.0 dB 1.5 dB 900 Hz+0.2 dB 1.5 dB 1000 HzReference 2000 Hz+0.4 dB 1.5 dB 5000 H

36、z+6.7 dB 1.0 dB 10000 Hz+17.9 dB 2.5 dB 8 PART LIST NOTES 1. This part is not normally available from Customer Service. Approval from the Field Service Manager is required before ordering. 2. The individual parts located on the PCBs are listed in the Electrical Part List. 3. This part is critical fo

37、r safety purposes. Failure to use a substitute replacement with the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. 4. These parts are used on the FreeSpace 360 in-ground EQ card only. 5. These parts are used on the FreeSpace 360 Surfac

38、e EQ card only. 9 Resistors FREESPACE 360 EQ CARD PART LIST Capacitors Reference Designator DescriptionPart NumberNote C2 .22uF, BOX, 85, 50V, 5%137127-224 C5, 56390pF, MONO, COG, 50V, 5%140564-391 C6 .018uF, BOX, 85, 100V, 5%137127-183 C7 .0068uF, BOX, 85, 100V, 5%137127-682 5 C7, 57, 87.0068uF, BO

39、X, 85, 100V, 5%137127-682 4 C8 .047uF, BOX, 85, 63V, 5%137127-473 C9, 10 .47uF, BOX, 85, 50V, 5%137127-474 5 C11 .0015uF, BOX, 85, 100V, 5%137127-152 4 C11 820pF, MONO, COG, 50V, 5%140564-821 5 C12 .015uF, BOX, 85, 100V, 5%137127-153 4 C12 .056uF, BOX, 85, 63V, 5%137127-563 5 C13 .0018uF, BOX, 85, 1

40、00V, 5%137127-182 5 C13, 81, 82.022uF, BOX, 85, 100V, 5%137127-223 4 C14 .0027uF, BOX, 85, 100V, 5%137127-272 4 C14, 16.001uF, BOX, 85, 100V, 5%137127-102 5 C15, 51.033uF, BOX, 85, 63V, 5%137127-333 C16 .01uF, BOX, 85, 100V, 5%137127-103 4 C17 18PF, 0805, 50V, 5%133622-180 5 C50, 58, 88.0056uF, BOX,

41、 85, 100V, 5%137127-562 4 C50, 61.0033uF, BOX, 85, 100V, 5%137127-332 5 Reference Designator DescriptionPart NumberNote R1 2.00K, CHIP, 0805, 1%133625-2001 R2, 5, 12, 17, 18, 24, 26, 28, 30, 59, 64, 83, 89 JUMPER, CHIP, 0805133627 4 R2, 5, 12, 17, 18, 23, 26, 59, 64 JUMPER, CHIP, 0805 133627 5 R3 18

42、.2K, CHIP, 0805, 1%133625-1822 R4 1.50K, 0805, 1/10W, 1%133625-1501 5 R4 2.21K, CHIP, 0805, 1/10W, 1%133625-2211 4 R8, 21 200K, 0805, 1/10W, 1%133625-2003 R9, 10, 19, 20392K, 0805, 1/10W, 1%133625-3923 5 R13, 1428.7K, 0805, 1/10W, 1%133625-2872 R15, 16127K, 0805, 1/10W, 1%133625-1273 R19, 20169K, 08

43、05, 1/10W, 1%133625-1693 4 R50, 63, 80, 9324.9K, CHIP, 0805, 1%133625-2492 R51, 5216.5K, CHIP, 0805, 1%133625-1652 5 R55, 5610.0K, CHIP, 0805, 1%133625-1002 5 R55, 5647.5K, CHIP, 0805, 1%133625-4752 4 R57, 585.76K, CHIP, 0805, 1%133625-5761 5 R57, 58, 87, 886.81K, CHIP, 0805, 1%133625-6811 R61, 62,

44、91, 924.87K, CHIP, 0805, 1%133625-4871 4 R81, 82, 51, 528.25K, CHIP, 0805, 1/10W, 1%133625-8251 R85, 8666.5K, 0805, 1/10W, 1%133625-6652 4 R94 100, CHIP, 0805, 1%133625-1000 10 FREESPACE 360 EQ CARD PART LIST Capacitors Integrated Circuits Reference Designator DescriptionPart NumberNote U1, 3, 50P AMP QUAD, SOIC-14, NJM2059 187472 4 U2, 4OP AMP DUAL, SOIC-8, NJM4559 187473 Miscellaneous Reference Designator DescriptionPart NumberNote C52 .068uF, BOX, 85, 6