Bose-1800VI-pwr-sm维修电路原理图.pdf

1998 Bose Corporation Model 1600VI and 1800VI Professional Stereo Power Amplifiers Part Number 199747 Rev. 00 Service Manual RadioFans.CN 收音机爱 好者资料库 2 CONTENTS Safety Information. 4 Electrostatic Discharge Sensitive (ESDS) Device Handling . 4 1800VI Specifications. 5-6 1600VI Specifications. 7-8 Figure 1. 1600VI and 1800VI Block Diagram . 9 Theory of Operation. 10-18 Disassembly/Assembly Procedures . 19-30 Figure 2. Cover Removal Screw Location Side View. 19 Figure 3. Cover Attaching Hardware . 20 Figure 4. Rear View - Attaching Hardware. 20 Figure 5. 240V Configuration . 21 Figure 6. 1600VI and 1800VI Amplifier Assembly . 21 Figure 7. Bottom Mounted Components . 22 Figure 8. Side View - Bottom Mounted Components . 27 Figure 9. Heatsink Bridge. 27 Figure 10. Input Module Screw Location. 29 Test Procedures .31-33 Figure 11. EQ Card Placement . 31 Frequency Response Test Table . 32 Part List Notes. 34 Main Part List. 35-37 Figure 12. Amplifier Test Setup Diagram . 31 Figure 13. Front Panel Views, 100V and 120V Variation, 240V Variation. 37 Figure 14. Back Panel View . 37 Figure 15. Cross Section View. 38 Figure 16. 1600VI and 1800VI Amplifier Top View . 39 Figure 17. 1600VI and 1800VI, Amplifier Assembly Removed View . 40 Electrical Part List. 41-54 Packing List . 55 Figure 18. 1600VI and 1800VI Amplifiers Packing Diagram . 55 Wiring Diagrams.56-57 Figure 19. 1600VI and 1800VI Wiring Diagram. 56 Figure 20. 1600VI and 1800VI 240V Wiring Diagram . 57 IC Pinout Diagrams . 58-59 RadioFans.CN 收音机爱 好者资料库 3 4 SAFETY INFORMATION ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING 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 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 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 wrap or 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 leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit before returning the unit to the customer. 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 current 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 and then in OFF position, measure from a known earth ground (metal waterpipe, 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. Reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RE- TURNING THE UNIT TO THE CUSTOMER. B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and connect 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 between 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 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 rechecked before it is returned to the customer. 5 Size:3.5H (2U) x 19W x 13.25D 89mm x 483mm x 337mm Weight:Net: 33 lbs. (15 kg) Shipping weight: 39 lbs. (17.7 kg) Display:7 LED indicators per channel 1 green - READY, 5 yellow - SIGNAL, 1 red - CLIP/PROTECT Operating Temperature:0 to 50 C, up to 85% RH Performance Specifications Continuous Average Output Power, both channels driven:450 Watts per channel into 8 Ohms from 20 Hz to 20 kHz, with no more than 0.2% THD 600 Watts per channel into 4 Ohms from 20 Hz to 20 kHz, with no more than 0.2% THD Bridged Mono Operation:1400 Watts into 8 Ohms from 20 Hz to 20 kHz, with no more than 0.2% THD Voltage Output:60 V line voltage per channel into 8 Ohms 49 V line voltage per channel into 4 Ohms Dynamic Headroom:1.0 dB nominal Power 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; 55 dB 10 kHz Damping Factor: 170 Input 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 kHz Low: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 (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 to 1.5V rms, remove JP100 (CH1) and JP200 (CH2), located on the main amplifier board. 6 Input Overload:+18 dBu IM Distortion:< 0.1% THD: 0.775 V Sensitivity, < 0.2% 1.5 V Sensitivity, 100 dB, A-weighted, referenced to rated power into 4 Ohms (high gain) 78 dBW, A-weighted, referenced to 1 W into 4 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 Bose input module) Power Consumption:55 W at idle 800 W with musical program 1500 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) Fusing:15 Amp Slo-Blo (125 V/60 Hz) 8 Amp Slo-Blo (230 V/50 Hz) 1800VI SPECIFICATIONS 7 Size:3.5H (2U) x 19W x 13.25D 89mm x 483mm x 337mm Weight:Net: 30 lbs. (13.6 kg) Shipping weight: 36 lbs. (16.3 kg) Display:7 LED indicators per channel 1 green - READY, 5 yellow - SIGNAL, 1 red - CLIP/PROTECT Operating Temperature:0 to 50 C, up to 85% RH Performance Specifications Continuous Average Output Power, both channels driven:240 Watts per channel into 8 Ohms from 20 Hz to 20 kHz, with no more than 0.2% THD 325 Watts per channel into 4 Ohms from 20 Hz to 20 kHz, with no more than 0.2% THD Bridged Mono Operation:700 Watts into 8 Ohms at 1 kHz, with no more than 0.2% THD Voltage Output:43.8 V line voltage per channel into 8 Ohms 36.0 V line voltage per channel into 4 Ohms Dynamic Headroom:2.0 dB nominal Power 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; 55 dB 10 kHz Input 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 Ohms Low: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 SPECIFICATIONS *The amplifier sensitivity is set to 0.775V rms for rated output. To reduce the sensitivity by 6 dB to 1.5V rms, remove JP100 (CH1) and JP200 (CH2), located on the main amplifier board. 8 Input Overload:+18 dBu IM Distortion:< 0.1% THD: 0.775 V Sensitivity, < 0.2% 1.5 V Sensitivity, 100 dB, A-weighted, referenced to rated power into 4 Ohms (high gain) 78 dBW, A-weighted, referenced to 1 W into 4 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 Bose input module) Power Consumption:45 W at idle 500 W with musical program 1000 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 SPECIFICATIONS 9 Amplifier CH 1 CH 2 CH 2 CH 1 CH 1CH 2 OUTOUT CH 1 OUT CH 2 OUT Output Relays Fan Drive Commutation Control (Class H) Power Supplies On/Off Standby Sequence Fuse (230V) Only Regulation (not used with 1600VI) Phase Control Temperature Sense Protection Display Drive Display Level Control Sequence Control Input Module Bose EQ Card(s) Line Filter Sequence H N AC CH 1 CH 2 Input Send Rcv CH 1CH 2 Lowpass Filter Figure 1. 1600VI and 1800VI Block Diagram 10 THEORY OF OPERATION 1. General The Bose Model 1600VI and 1800VI Professional Stereo Power Amplifiers are two-channel, installed/portable amplifiers made for professional sound applications. The 1600VI is rated at 240 Watts into 8 Ohms and 325 Watts into 4 Ohms. In the bridged-mono setting it can deliver 700 Watts. The 1800VI is rated at 450 Watts into 8 Ohms and 600 Watts into 4 Ohms. In the bridged-mono setting it can deliver 1400 Watts. The protection circuits designed into the amplifiers will 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 for exceptional hum and noise rejection. Through the use of equalization cards the amplifier can provide active equalization for Bose 402, 502A, 502B, 802, Model 25/32, Model 8, Model 1B and FreeSpace 360 professional loudspeakers. These cards fit into the J6, Channel 1 and J7, Channel 2 connectors located on the Input Module motherboard or the Bose ACM-1 Amplifier Control Module. Additional Features are 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 Switch 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 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 display per channel, including power ready and Clip/Protect indicators Two-speed fan cooled 2. Circuit Descriptions This 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 this manual. Component 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. 11 THEORY OF OPERATION 2.1 Input Module Note: Some amplifiers will be equipped with the Bose ACM-1 Amplifier Control Module in place of the Bose Input Module. This module retains all of the capabilities of the Bose Input Module, e