Bose-1800-V-Service-Manual 电路图 维修手册.pdf

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1、1 Table of Contents SAFETY INFORMATION. 2 ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING . 3 SPECIFICATIONS . 4 FREQUENCY CURVES. 6 Figure 1. 402 EQ Card HF Only Response . 6 Figure 2. 402 EQ Card Full Range Response . 6 Figure 3. 502A EQ Card HF Only Response . 7 Figure 4. 502A EQ Card Fu

2、ll Frequency Response . 7 Figure 5. 502B EQ Card Response . 8 Figure 6. 802 EQ Card HF Only Response . 8 Figure 7. 802 EQ Card Full Range Response . 9 Figure 8. 1800-V Block Diagram. 10 THEORY OF OPERATION .11 1. GENERAL.11 2. CIRCUIT DESCRIPTIONS. 12 3. PROTECTION CIRCUITRY . 17 1800-V DISASSEMBLY/

3、ASSEMBLY PROCEDURES. 20 Figure 9. Covers Attaching Hardware . 20 Figure 10. Rear View - Attaching Hardware. 22 Figure 11. 240V Configuration . 22 Figure 12. 1800-V Amplifier Assembly . 22 Figure 13. Bottom Mounted Components. . 25 Figure 14. Side View - Bottom Mounted Components. 25 Figure 15. Heats

4、ink Bridge . 26 TEST PROCEDURES. 29 AMPLIFIER TEST PROCEDURES . 29 EQ CARD TEST PROCEDURES . 30 PART LISTS AND EXPLODED VIEWS . 33 1800-V MAIN ASSEMBLY PART LIST . 34 Figure 16. Front Panel Views. 37 Figure 17. Back Panel View. 37 Figure 18. Cross Section View. 37 Figure 19. Top Down Inside Views. 3

5、8 1800-V PACKAGING PART LIST . 39 Figure 20. 1800-V Amplifier and EQ Card Packaging Illustration . 39 1800-V ELECTRICAL AND MECHANICAL PART LISTS . 40 Display PCB Electrical Part List . 40 I/O PCB Electrical Part List . 42 Power Supply PCB Electrical Part List . 45 Regulator PCB Electrical Part List

6、 . 49 Power Switch PCB Electrical Part List . 51 Amplifier PCB Electrical Part List. 52 Output PCB Electrical Part List . 55 Input Module PCB Electrical Part List . 57 402 Equalizer PCB Assembly Electrical Part List . 60 502A Equalizer PCB Assembly Electrical Part List. 61 502B Equalizer PCB Assembl

7、y Electrical Part List . 63 802 Equalizer PCB Assembly Electrical Part List . 64 WIRING DIAGRAMS . 66 Figure 21. 1800-V Wiring Diagram . 66 Figure 22. 1800-V 240V Wiring Diagram Variation Difference. 67 SCHEMATICS AND PCB LAYOUTS . 68 402 Equalizer Card Schematic . 69 502A Equalizer Card Schematic .

8、 70 502B Equalizer Card Schematic . 71 802 Equalizer Card Schematic . 72 402, 502A AND 802 Equalizer Card PC Board Layout, P/N 177328, Revision 01 . 73 502B Equalizer Card PC Board Layout, P/N 178860, Revision 0 . 74 CAUTION: THE 1800-V PROFESSIONAL STEREO POWER AMPLIFIER SYSTEM CONTAINS NO USER-SER

9、VICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE. RadioFans.CN 收音机爱 好者资料库 2 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 t

10、hat 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. Use the following checks to perform these measurements: A.

11、 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 Leak

12、age Current for Appli- ances 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, sc

13、rewheads, 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 LIM- ITS SPEC

14、IFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUSTOMER. B. Insulation Resistance Test Cold Check-(1) Unplug the power supply and con- nect a jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure

15、 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 infi- n

16、ite. 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. PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR T

17、HE 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 PURPOSE. SAFETY INFORMATION RadioFans.CN 收音机爱 好者资料库 3 ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING This unit contains E

18、SDS 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 conduc- tive floor mats. Avoid touching the leads or contact

19、s of ESDS devices or PC boards even if prop- erly grounded. Handle boards by the edges only. Transport 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. R

20、adioFans.CN 收音机爱 好者资料库 4 SPECIFICATIONS Performance Specifications Size:3.5H (2U) x 19 W x 13.25 D 89mm x 483mm x 337mm Weight:Net 30 lbs. (13.6 kgs) Shipping 36 lbs. (16.3 kgs) Display:7 LED indicators per channel 1 green READY, 5 yellow SIGNAL, 1 red CLIP/PROTECT Operating Temperature:0 to 50 C, u

21、p to 85% RH Power Output 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

22、Hz to 20 kHz, with no more than 0.2% THD Voltage Output:61.6V line voltage per channel into 8 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:2

23、5 kilohms unbalanced, each leg to ground 50 kilohms balanced *Sensitivity: High0.775V rms for rated power into 4 ohms 1 kHz 57mV rms for 1W into 4 ohms 1 kHz Low1.5V rms for rated power into 4 ohms at 1 kHz 116mV rms for 1W into 4 ohms 1 kHz *Gain: High36.2 dB ( 0.5 dB) Low30.2 dB ( 0.5 dB) Input Ov

24、erload:+18 dBu *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. 5 IM Distortion: 0.1% THD: 0.775V Sensitivity 0.2% 1.5V Sensitivity 100 dB, A-weighted, ref. to rat

25、ed power into 4 ohms (high gain) 78 dBW, A-weighted, referenced to 1W into 4 ohms (high gain) Slew Rate:10V/S (Bandwidth limited) 40V/S (RFI filtering removed) CMRR: 80 dB 1 kHz (without Bose Input Module) 60 dB from 20 Hz-20kHz (without Bose Input Module) Power Consumption:40W at idle 800W with mus

26、ical program 1500W at full power into 8 ohms (continuous) 2400W at full power into 4 ohms (continuous) Power Requirements:120VAC/50-60 Hz 220-240VAC/50-60 Hz 100VAC/50-60 Hz Fusing:15 amp slo-blo (125V/60 Hz) 8 amp slo-blo (230V/50Hz) Figure 2. 402 EQ Card Full Range Response Figure 1. 402 EQ Card HF Only Response FREQUENCY CURVES 6 Fi