Bose-1600VI-pwr-sm维修电路原理图.pdf

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1、1998 Bose CorporationModel 1600VI and 1800VI ProfessionalStereo Power AmplifiersPart Number 199747 Rev. 00Service ManualRadioFans.CN 收音机爱 好者资料库2CONTENTSSafety Information. 4Electrostatic Discharge Sensitive (ESDS) Device Handling . 41800VI Specifications. 5-61600VI Specifications. 7-8Figure 1. 1600V

2、I and 1800VI Block Diagram . 9Theory of Operation. 10-18Disassembly/Assembly Procedures . 19-30Figure 2. Cover Removal Screw Location Side View. 19Figure 3. Cover Attaching Hardware . 20Figure 4. Rear View - Attaching Hardware. 20Figure 5. 240V Configuration . 21Figure 6. 1600VI and 1800VI Amplifier

3、 Assembly . 21Figure 7. Bottom Mounted Components . 22Figure 8. Side View - Bottom Mounted Components . 27Figure 9. Heatsink Bridge. 27Figure 10. Input Module Screw Location. 29Test Procedures .31-33Figure 11. EQ Card Placement . 31Frequency Response Test Table . 32Part List Notes. 34Main Part List.

4、 35-37Figure 12. Amplifier Test Setup Diagram . 31Figure 13. Front Panel Views, 100V and 120V Variation, 240V Variation. 37Figure 14. Back Panel View . 37Figure 15. Cross Section View. 38Figure 16. 1600VI and 1800VI Amplifier Top View . 39Figure 17. 1600VI and 1800VI, Amplifier Assembly Removed View

5、 . 40Electrical Part List. 41-54Packing List . 55Figure 18. 1600VI and 1800VI Amplifiers Packing Diagram . 55Wiring Diagrams.56-57Figure 19. 1600VI and 1800VI Wiring Diagram. 56Figure 20. 1600VI and 1800VI 240V Wiring Diagram . 57IC Pinout Diagrams . 58-59RadioFans.CN 收音机爱 好者资料库34SAFETY INFORMATIONE

6、LECTROSTATIC DISCHARGE SENSITIVE (ESDS)DEVICE HANDLINGThis 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 station or heel straps tha

7、t connect to conductive floormats. Avoid touching the leads or contacts of ESDS devices or PC boards 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, p

8、olystyrene foam, clear plastic bags, bubble wrapor plastic trays.1. Parts that have special safety characteristics are identified by the symbol on schemat-ics or by special notes on the parts list. Use only replacement parts that have critical character-istics recommended by the manufacturer.2. Make

9、 leakage current or resistance measurements to determine that exposed parts areacceptably insulated from the supply circuit before returning the unit to the customer. Use thefollowing checks to perform these measurements:A. Leakage Current Hot Check-With the unit completely reassembled, plug the AC

10、line corddirectly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use aleakage current tester or a metering system that complies with American National StandardsInstitute (ANSI) C101.1 Leakage Current for Appliances and Underwriters Laboratories (UL)1492 (71). With the

11、 unit AC switch first in the ON position and then in OFF position, measurefrom a known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of theunit (antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shafts,etc.), especially any exposed metal parts

12、 that offer an electrical return path to the chassis. Anycurrent measured must not exceed 0.5 milliamp. Reverse the unit power cord plug in the outletand repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREININDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RE-TURNING TH

13、E UNIT TO THE CUSTOMER.B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and connect ajumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3)Measure the resistance with an ohmmeter between the jumpered AC plug and each exposedmetallic cabinet

14、part on the unit. When the exposed metallic part has a return path to thechassis, the reading should be between 1 and 5.2 Megohms. When there is no return path tothe chassis, the reading must be infinite. If it is not within the limits specified, there is thepossibility of a shock hazard, and the un

15、it must be repaired and rechecked before it is returnedto the customer.5Size:3.5H (2U) x 19W x 13.25D89mm x 483mm x 337mmWeight:Net: 33 lbs. (15 kg)Shipping weight: 39 lbs. (17.7 kg)Display:7 LED indicators per channel1 green - READY, 5 yellow - SIGNAL,1 red - CLIP/PROTECTOperating Temperature:0 to

16、50 C, up to 85% RHPerformance SpecificationsContinuous Average Output Power,both channels driven:450 Watts per channel into 8 Ohms from20 Hz to 20 kHz, with no more than 0.2% THD600 Watts per channel into 4 Ohms from20 Hz to 20 kHz, with no more than 0.2% THDBridged Mono Operation:1400 Watts into 8

17、Ohms from 20 Hz to 20 kHz,with no more than 0.2% THDVoltage Output:60 V line voltage per channel into 8 Ohms49 V line voltage per channel into 4 OhmsDynamic Headroom:1.0 dB nominalPower Bandwidth:5 Hz to 40 kHz (+0, -3 dB)Frequency Response:20 Hz to 20 kHz (0.75 dB)Channel Separation: 65 dB 1 kHz; 5

18、5 dB 10 kHzDamping Factor: 170Input Impedance:25k Ohms unbalanced, each leg to ground,50k Ohms balanced*Sensitivity:High:.775 Vrms for rated power into 4 Ohms 1 kHz, 57 mVrms for 1W into 4 Ohms 1 kHzLow:1.5 Vrms for rated power into 4 Ohms 1 kHz,116 mVrms for 1W into 4 Ohms 1 kHz*Gain:High:36.0 dB (

19、0.5 dB)Low:30.3 dB (0.5 dB)1800VI SPECIFICATIONS*The amplifier sensitivity is set to 0.775V rms for rated output. To reduce the sensitivity by 6 dB to1.5V rms, remove JP100 (CH1) and JP200 (CH2), located on the main amplifier board.6Input Overload:+18 dBuIM Distortion: 0.1%THD: 0.775 V Sensitivity,

20、0.2% 1.5 V Sensitivity, 100 dB, A-weighted, referenced to ratedpower into 4 Ohms (high gain) 78 dBW, A-weighted, referenced to 1 W into4 Ohms (high gain)Slew Rate:10 V/S (bandwidth limited)40 V/S (RFI filtering removed)CMRR: 80 dB 1 kHz (without Bose input module) 60 dB from 20 Hz - 20 kHz (without

21、Boseinput module)Power Consumption:55 W at idle800 W with musical program1500 W at full power into 8 Ohms (continuous)2400 W at full power into 4 Ohms (continuous)Power Requirements:120 VAC/50-60 Hz (USA and Canada)230 VAC/50-60 Hz (Europe/UK)240 VAC/50-60 Hz (Australia)100 VAC/50-60 Hz (Japan)Fusin

22、g:15 Amp Slo-Blo (125 V/60 Hz)8 Amp Slo-Blo (230 V/50 Hz)1800VI SPECIFICATIONS7Size:3.5H (2U) x 19W x 13.25D89mm x 483mm x 337mmWeight:Net: 30 lbs. (13.6 kg)Shipping weight: 36 lbs. (16.3 kg)Display:7 LED indicators per channel1 green - READY, 5 yellow - SIGNAL,1 red - CLIP/PROTECTOperating Temperat

23、ure:0 to 50 C, up to 85% RHPerformance SpecificationsContinuous Average Output Power,both channels driven:240 Watts per channel into 8 Ohms from20 Hz to 20 kHz, with no more than 0.2% THD325 Watts per channel into 4 Ohms from20 Hz to 20 kHz, with no more than 0.2% THDBridged Mono Operation:700 Watts

24、 into 8 Ohms at 1 kHz, with nomore than 0.2% THDVoltage Output:43.8 V line voltage per channel into 8 Ohms36.0 V line voltage per channel into 4 OhmsDynamic Headroom:2.0 dB nominalPower Bandwidth:5 Hz to 40 kHz (+0, -3 dB)Frequency Response:20 Hz to 20 kHz (0.75 dB)Channel Separation: 65 dB 1 kHz; 5

25、5 dB 10 kHzInput Impedance:25k Ohms unbalanced, each leg to ground,50k Ohms balanced*Sensitivity:High:0.775 Vrms for rated power into 4 Ohms,83 mVrms for 1 W into 4 OhmsLow:1.5 Vrms for rated power into 4 Ohms,160 mVrms for 1 W into 4 Ohms 1 kHz*Gain:High:33.3 dB (0.5 dB)Low:27.6 dB (0.5 dB)1600VI S

26、PECIFICATIONS*The amplifier sensitivity is set to 0.775V rms for rated output. To reduce the sensitivity by 6 dB to1.5V rms, remove JP100 (CH1) and JP200 (CH2), located on the main amplifier board.8Input Overload:+18 dBuIM Distortion: 0.1%THD: 0.775 V Sensitivity, 0.2% 1.5 V Sensitivity, 100 dB, A-w

27、eighted, referenced to ratedpower into 4 Ohms (high gain) 78 dBW, A-weighted, referenced to 1 W into4 Ohms (high gain)Slew Rate:40 V/S (bandwidth limited)CMRR: 80 dB 1 kHz (without Bose input module) 60 dB from 20 Hz - 20 kHz (without Boseinput module)Power Consumption:45 W at idle500 W with musical

28、 program1000 W at full power into 8 Ohms (continuous)1550 W at full power into 4 Ohms (continuous)Power Requirements:120 VAC/50-60 Hz (USA and Canada)230 VAC/50-60 Hz (Europe/UK)240 VAC/50-60 Hz (Australia)100 VAC/50-60 Hz (Japan)Fusing:10 Amp Slo-Blo (125V/60Hz)7 Amp Slo-Blo (230V/50Hz)1600VI SPECI

29、FICATIONS9AmplifierCH 1CH 2CH 2CH 1CH 1CH 2OUTOUTCH 1OUTCH 2OUTOutputRelaysFan DriveCommutationControl(Class H)Power SuppliesOn/OffStandbySequenceFuse(230V)OnlyRegulation (not usedwith 1600VI)Phase ControlTemperatureSenseProtectionDisplayDriveDisplayLevelControlSequenceControlInput ModuleBoseEQ Card

30、(s)LineFilterSequenceHNACCH 1CH 2InputSendRcvCH 1CH 2LowpassFilterFigure 1. 1600VI and 1800VI Block Diagram10THEORY OF OPERATION1. GeneralThe Bose Model 1600VI and 1800VI Professional Stereo Power Amplifiers are two-channel,installed/portable amplifiers made for professional sound applications. The

31、1600VI is rated at240 Watts into 8 Ohms and 325 Watts into 4 Ohms. In the bridged-mono setting it can deliver700 Watts. The 1800VI is rated at 450 Watts into 8 Ohms and 600 Watts into 4 Ohms. In thebridged-mono setting it can deliver 1400 Watts.The protection circuits designed into the amplifiers wi

32、ll protect them from unexpected faults,excessive temperature, continuous current limiting and shorted outputs.The balanced inputs use high quality, high common-mode rejection differential amplifiers forexceptional hum and noise rejection.Through the use of equalization cards the amplifier can provid

33、e active equalization for Bose402, 502A, 502B, 802, Model 25/32, Model 8, Model 1B and FreeSpace 360 professionalloudspeakers. These cards fit into the J6, Channel 1 and J7, Channel 2 connectors located onthe Input Module motherboard or the Bose ACM-1 Amplifier Control Module.Additional Features are

34、 as follows: Two input connectors per channel allow 1/4 TRS, XLR, or quick connect terminal block connection Two input connectors for each channel are wired in parallel Accepts balanced or unbalanced lines Independent CH 1 and CH 2 Level Controls with 11 detented positions Level Control Defeat Switc

35、h Dual Mono Mode for combining the power of both channels into a single higher powered channel Sequencer connection for sequentially powering-up multiple amplifiers to limit instantaneous in-rush current Bi-Amp/Full Range configurable Internally configurable for Parallel Mono mode for single channel

36、 low impedance operation Internally configurable for 0.775V or 1.5V rms input sensitivity Internally configurable input polarity of XLR connectors Class H dual-rail power supply Additional protection circuitry includes Clipping Eliminator, AC Lines Fuse Power Connected/Standby Indicator 7 LED displa

37、y per channel, including power ready and Clip/Protect indicators Two-speed fan cooled2. Circuit DescriptionsThis section discusses the theory of operation of the 1600VI and 1800VI Amplifiers.For a better understanding of the circuitry involved, refer to the schematics included with thismanual. Compo

38、nent pin designation is notated as follows: U1-7 means U1 at pin 7.Unless otherwise noted, this discussion centers around the CH 1 circuitry.The CH 2 circuitry is essentially identical.11THEORY OF OPERATION2.1 Input ModuleNote: Some amplifiers will be equipped with the Bose ACM-1 Amplifier Control M

39、odule inplace of the Bose Input Module. This module retains all of the capabilities of the Bose InputModule, except sequence (see section 2.8), and includes the ability to control and monitor theamplifier over a control network. Refer to the ACM-1 Amplifier Control Module service manual,part number

40、199746 for more information.The Input Module consists of signal input connections, mode switching, optional equalization,and power sequencing circuitry. The module operates from +15V and -15V, supplied by thehost amplifier through J2-2 and J2-1 respectively.The signal inputs are designed for balance

41、d connection, though unbalanced inputs can beconfigured by proper input wiring. Channel 1 (CH1) line-level inputs are made via P4 and J4,Channel 2 (CH2) input connections are made via P1 and J5. P4 and P1 allow for the insertionof either male XLR or phone plugs. The phone plug terminations are: tip

42、positive (+), ringnegative (-), and sleeve ground. The XLR connections pins 2 and 3 are user configurable. Asshipped, jumper blocks JB2 and JB1 have jumpers between pins 2 to 3 and 5 to 6. This jumperconfiguration assigns XLR pin 2 to positive (+) and pin 3 to negative (-), pin 1 is ground in allcon

43、figurations. If the jumpers are placed across JB1/JB2 pins 1 to 2 and 4 to 5 the XLR pinassignment becomes pin 2 negative (-), and pin 3 positive (+). The Euro-block terminal blockconnectors J4 and J5 assignments are: pin 1 positive (+), pin 2 negative (-), and pin 3 ground.The CH1 input signal is a

44、pplied to ICs U1, and the CH2 signal to U2. U1 and U2 are unity gain(0 dB) differential amplifiers (SSM2141). These inputs are protected against RFI (RadioFrequency Interference) and ESD (Electro-Static Discharge). The signals are then routed tothe A inputs of op-amp/switch ICs (BA3128) U4 (CH1) and

45、 U3 (CH2) and to EQ cardconnectors J6-4 and J7-4 respectively. The switchs B inputs are driven by the output of the EQcards via J6-5 and J7-5.The input module detects the presence of EQ cards via J7-6 and J6-6. Without the cardinstalled these pins are pulled high (+15V) which keeps both CH1 and CH2

46、sections of dualLED D23 extinguished. This logic high signal is also applied to the control pins of the switchICs which selects the A (unequalized) input. When an EQ is plugged into J7 and/or J6 pin 6 theEQ is detected and pulls the control pin low (+7.5V), turning on the corresponding LED(s) andswi

47、tching the IC to the B input which selects the output of the EQ card.On some EQ cards the equalization can be modified for either full range “FULL BANDWIDTH”or bi-amplified “HF ONLY” operation. The equalization mode switch SW2 selects either FULLBANDWIDTH or HF ONLY modes of the EQ cards installed.

48、These control signals are sent tothe EQ cards via J6-7, 8 and J7-7, 8.The selected signals from U4 and U3 are buffered by U7B and U7A which are wired to P2 andP3. These phone connectors provide balanced, buffered, equalized outputs (if an EQ card isinstalled) to drive additional amplifiers or other

49、equipment. This allows external equipment toprovide equalized signals without the need for additional equalization. The pin assignment forthese connectors are the same as for the input phone connectors P1B and P4B. The outputcircuitry is also protected from RFI and EMI.The amplifier can be operated

50、in four different output modes: normal (two independent chan-nels) dual mono (one input channel, two separate channels), bridged mono, or parallel mono.These modes are selected via SW1 and control the operation of op-amp/switching ICs U6 andU5. Parallel mono operation requires internal modifications