bose 1800 power amplifier service manual

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bose 1800 power amplifier service manualLED PCB Layout LED PCB Schematic Diagram Amplifier Schematic Diagram Amplifier PCB Layout Use the part numbers listed below when ordering these transis- They include the following parts: Use the part numbers listed below when ordering these transis- tors.Use only replacement parts 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. They also have a power monitor display using a light emitting diode array and in the case of the 1801 signal meters as well. Rear Panel Removal 9.1 Perform procedure 5. 13.1 Perform procedure 1. 9.2 Remove the gain control knobs. One with two or three wires and one single wire. The later pro- 4.3 Turn the gain controls up to the point. Connect the wire directly.This problem was caused by a change we were forced to make when RCA discontinued the manufacture of the transistor we had been using as Q3 on the 1800 PCB's. The new output transis- tors are not compatible with the original 102433 transistors. Please do not offer the downloaded file for sell only use it for personal usage. Looking for other manual? For this no need registration. May be help you to repair. You could suffer a fatal electrical shock. Instead, contact your nearest service center. Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, Also some files are djvu so you need djvu viewer to open them. These free programs can be found on this page: needed progs If you use opera you have to disable opera turbo function to download file. If you cannot download this file, try it with CHROME or FIREFOX browser. Basszus vegfoka 2-3mp mulva megfut vagy pozitivba vagy negativba ha nincs a hangszoro rarakva, hangszoroval azonnal letilt, (amikor a kimeneten eljut DC 4V-ig a vedelem lekapcsolja relevel az erositot).http://farrowmemoryspeakers.com/userfiles/bosch-instant-hot-water-manual.xml

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Mikor a MUTE hibat kerestem, volt olyan eset is, hogy nem futott meg a kimenet es szolt a basszus rendesen, de ujboli bekapcsolaskor ha nem halkitottam le a potit akkor kikapcsolt a rele, ha lehalkitottam akkor jo lett, de nagyon susogott, arra hasonlitott mint amikor FM radio nincs az allomason, van egy kozos mute tranzisztor az kapcsolja az osszes tobbit, ha azt kiszedtem akkor is megmaradt a susogas, szerintem visszafele jott valamelyik oldalrol ezert szedtem ki mindegyik oldalrol a tranzisztorokat, nem akartam bajlodni vele, hogy honnet jon a susosgas vissza. Mi lehet a gond? BOSE bekotesi rajz Legyszi legyszi ha valaki tudnasegiteni egy BOSE AMP2440-as erosito bekoteseben,azt nagyon szepen megkoszonem. Ez AUDI A3-asbol van, a steker nincsmeg. Bose Sounddock 1 tapegyseg csati Sziasztok. Egy baratom megkert, hogy talaljak vagy gyartsak egy tapegyseget a Bose dokkolojahoz. Sajnos az eredetiket aranyarban adjak, igy gyartanom kell egyet. Talatam is egy elegans kis 4 pines csatit, de fennakadtam az eredeti csatlakozo labkiosztasan. Talaltam egy rajzot de nem tudom eldonteni, hogy a kabelen levot abrazolja, vagy a dokkoloban levot. Ha valakinek dolga volt ilyennel, es tudna segiteni, kerem ne tartsa vissza magat. Koszonom.. Bose Lifestyle CD-20 FLC kijelzo halvany Sziasztok! A fenti keszuleknek halvany a kijelzese. Eleg erdekesen van megoldva a kijelzo tapfesze, sokban fugg a bejovo 12VAC feszultsegtol. Kerdesem az lenne, hogy a futest probaljam emelni, vagy a -24V-ot. A D8-on a 30V is kevesebb, de az AC 4.5V is. Melyik befolyasolja jobban a fenyerot. A futes, vagy a negativ tapfesz? Udv: Jacint Similar manuals: You can write in English language into the forum (not only in Hungarian). One of these I replaced all 28 output transistors to the newer designation, better signal cable and output speaker cable. I believe the audio is cleaner, slightly tighter bass and mids. These amps have powered my 4 BOSE 901 speakers for years. Maybe it is time to upgrade.http://pataibicaj.hu/userfiles/bosch-instant-water-heater-manual.xml Comments To purchase 1800 spares or accessories, please contact the company via their website or visit an authorised retailer. English. AtencionEnglishWhere to find.English. For the quick connect terminal block, use the female connector provided. Pin 3 carriesEnglishEnglishEnglishEnglishEnglishWarranty periodEnglishModel 1800-VI amplifier sensitivity Model 1600-VI amplifier sensitivityBose Corporation, The Mountain Bose s.p.A., Via della Magliana 876. The Mountain, Framingham. Something went wrong. View cart for details. All Rights Reserved. User Agreement, Privacy, Cookies and AdChoice Norton Secured - powered by Verisign. LED PCB Layout Figure 11. LED PCB Schematic Diagram Figure 12. Amplifier Schematic Diagram Figure 13. Amplifier PCB Layout Troubleshooting Guide Voltage Conversion Instructions Service Bulletin 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 CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE. 1 Use only replacement parts 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. 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, then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.http://schlammatlas.de/en/node/17691) 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 HAZ- ARD THAT MUST BE ELIMINATED BEFORE RETURNING 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. 3 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 unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrap or plastic trays. General Description The 1801 and 1800 are Integral Design Power Amplifiers with all Silicon Solid-State Circuitry using 14 power transistors per channel. Capable of complete stability with all loudspeaker loads regardless of capacitive or inductive character.http://floridamassagespa.com/images/bose-1sr-user-manual.pdf They employ fast acting electronic protection circuits for current limiting. They use computer grade capacitors throughout the power supply, along with a 2.0kW power transformer and 1300 sq.They also have a power monitor display using a light emitting diode array and in the case of the 1801 signal meters as well.Be sure there is sufficient heat sink compound on the PCB's heat sink. 4.2 Align the six screws that secure the PCB into place and secure the PCB to the chassis Power Amplifier 4.3 Connect the wire harness, thermal cutout wires, and the input cable to the PCB. 5. Front Panel Removal 5.1 Perform procedure Remove the nut securing the top of the front panel. The nut is located on the inside of the front chassis beside the thermal cutout indicator. 5.3 Remove the knobs on the controls and remove the two shaft nuts holding the front panel in place. 6. Front Panel Replacement 6.1 Align the front panel over the controls and secure it in place. 6.2 Secure the top of the front panel and replace the knobs. 6.3 Perform procedure Front Chassis Assembly Removal 7.1 Perform procedure Locate and remove the four screws that secure the front assembly to the chassis. 7.3 Push down on the top of the front assembly to release the bottom of the assembly and pull the assembly towards you. 8. Front Chassis Assembly Replacement 8.1 While pushing down on the front assembly slide the assembly in towards the unit. 8.2 Pull up on the front assembly to align the screw holes with the unit and secure the assembly in place. 8.3 Perform procedure 6. 5. Note: Remember how the lamp housing spacers are placed. 10. LED PCB Replacement 10.1 After reassembling the LED assembly, place it onto the front panel assembly and secure it in place Resolder the wires to the PCB Perform procedure Meter Assembly Removal 11.www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1626a9576397bc---compx-elock-manual.pdf1 Perform procedure Remove the three nuts holding the meter lamp housing assembly to the front panel assembly Remove the two nuts holding the wires to the meter you want to replace and remove the meter. 12. Meter Assembly Replacement 12.1 Place the new meter on to the front assembly. Four of the screws are located just inside the two handles and the other four are the larger screws on the front panel. 5.3 Using the handles pull the front panel away from the chassis enough to access the gain controls and LED PCB. 6. Front Panel Replacement 2.2 Secure the top cover to the unit. 3. Amplifier PCB Removal 3.1 Perform procedure Disconnect the wire harness, input cable, and the two wires going to the thermal cutout. 3.3 Remove the six screws (2B) located on the side of the unit between the heat sink fins (see Figure 2). 3.4 Carefully pry the PCB inward towards the power transformer (the PCB is stuck to the chassis by the heat sinking compound) and lift the board out of the unit. 4. Amplifier PCB Replacement 4.1 Slide the PCB into place. Be sure there is sufficient heat sinking compound on the PCB's heat sink. 4.2 Align the six screws that secure the PCB into place and secure the PCB to the chassis. 4.3 Connect the wire harness, thermal cutout wires, and the input cable to the PCB. 6.1 Slide the front panel into place. Be careful not to pinch the wiring harness at the bottom of the front panel between it and the chassis. 6.2 Align the holes in the front panel with the chassis, place the screws into their location by hand and then tighten with a screwdriver. Note: While tightening the screws lift up on the top lip of the panel to provide enough room to slide the top cover under the lip. 7. LED PCB Removal 7.1 Perform procedure Remove the two screws that secure the PCB to the front panel. 7.3 Unsolder the wires at the LED PCB, make a note of the wiring configuration, and remove the board from the unit. 8. LED PCB Replacement 8.1 Place the LED PCB into place on the front panel. 8.2 Secure the PCB to the front panel. 8.3 Resolder the wires to the LED PCB. 7. Rear Panel Removal 13.1 Perform procedure Locate and remove the four screws securing the rear panel and the rear panel bracket to the unit. Note: One of the screws holds the ground wires to the chassis. Take care not to lose the nuts that secure this screw and the wires. 14. Rear Panel Replacement 14.1 Align the rear panel with the chassis Secure the rear panel to the chassis. Be sure to use the rear panel bracket on the bottom of the panel Secure the ground wires to the chassis Perform procedure Perform procedure Remove the wires on the rear of the power switch Remove the nut securing the switch to the front panel and remove the switch. 12. Power Switch Replacement 12.1 Place the new power switch into the front panel and secure it in place Reconnect the wires on the rear of the switch Perform procedure 6. 8 See Figure 1 for the location of C4. Note: The 1801 and very early 1800's had two lugs on the caps. One with two or three wires and one single wire. The later production 1800 had three lugs on the capacitor. Either way the lug with the two or three wires is the lug to disconnect from the capacitor. All other lugs remain. 1.2 Remove the lug with two or three wires connected to it. 1.3 Connect a 0-200mA meter between the disconnected lug and the - terminal on the capacitor C Disconnect the PCB that is not being tested by unplugging the multiple pin connector. 1.5 Turn the amplifier on with no input signal applied and adjust the bias pot (R13) for 90mA with the board cold. Note: The PCB must be removed from the chassis for the bias to be adjusted. 2. Frequency Response Procedure 2.1 Apply a 1Vrms, 1kHz signal to the input. 2.2 Reference a db meter to the output. 2.3 Check the response from 20Hz to 20kHz. Refer to the response specification on page DC Offset Procedure 3.1 With no signal applied measure the DC offset at the output. It should measure 250mV or less. 4. Power Output Procedure 4.1 Connect an 8 ohm, 250 Watt load to the output. 4.2 Apply a 1.75Vrms, 1kHz signal to the input. 4.3 Turn the gain controls up to the point where the clipping LED's just begin to light up and check the output for 250 watts. 4.4 Repeat the steps above for a 4 ohm load. The output measurement should be 400 watts. 5. Harmonic Distortion Procedure 5.1 With the unit connected as in procedure 3, turn the gains up to just before clipping and check the distortion at the frequencies of 20Hz, 5kHz, and 10kHz. 5.2 The distortion limits are.15 from 20Hz to 5kHz and.5 from 5kHz to 10kHz. 6. Thermal Cutoff Procedure 6.1 Apply a signal to the unit with the outputs loaded ( 8 or 4 ohms ). Short one channel at a time until the unit goes into thermal cutoff. The thermal indicator should turn on and the output of the unit should be off. 6.2 Disconnect the short from the output. Wait until the unit comes out of thermal cutoff. You can speed this process by cooling the PCB with a fan. 6.3 Once the unit is cooled apply a signal to the channel you had shorted to check to see if its operational. 6.4 Apply a signal to the other channel and short the output. Wait for the thermal indicator to come on then remove the short and cool the PCB. 9 Approval from the Field Service Manager is required before ordering. 2. The reference designators in bold are located on the LED PCB. 3. This part is not located on the PCB'S. 4. The reference designators marked with a symbol are located on the Front Panel. 5. The part numbers listed with SIM are selected components and may not be directly interchangeable with standard available parts. 6. This part is located on the amplifier PCB. 7. This part is used on the 1801 Power Amplifier. 8. This part is used on the 1800 Power Amplifier. 9. Items marked with a symbol are not shown in the exploded views. Figure Front Panel 13 Connect the wire directly. Torroidal Power Transformer Amplifier used with a TC-18 Transit Case. In the case of the 1801, amplifier boards may be intermixed with no difficulty, using the clip connection. However, for serial numbers above 750, use of the larger heat sink version ( ) is required. When replacing amplifier boards in either unit, be certain to use additional thermal grease and to tighten the screws holding the board to the chassis. Connections for the transformer are the same as indicated in the Service Manual for both units. The 1800 power amplifier, when used with the TC-18 transit case, should be inspected periodically for dirt and dust accumulation on the heat sink surfaces. Studies reveal that the resistor normally runs at about F. The etch layout at R3 is not sufficient to provide adequate heat sink for this component, and the resistor eventually changes value due to the heat. This changing value causes the resistor, capacitor C2, and the zener diode CR15, to fail. The symmetrical circuit, R2, C2, and CR6 all have sufficient heat sinking capability on the etch layout and does not cause failures. To improve the reliability of the boards, R3 should be changed from a carbon resistor to a ceramic resistor of the same value. The ceramic resistor should be elevated slightly above the PCB surface to provide adequate air ventilation for self cooling purposes. Punch a small hole in one end of it and fasten it to the heat bracket using the screw that mounts Q3 to the bracket. The tension of the bent piece of plastic will keep the thermistor pressed into the thermal grease. 9. Adjust the bias current to 90ma according to the service manual. The new output transistors are not compatible with the original transistors.The versatility of the Amplifier makes it the perfect choice for almost every type of custom multi-room In this lab, you will create the power supply that transforms the AC wall The lightning flash with arrowhead, within an equilateral triangle, The Hakko 50B is designed to solder and desolder surface mounted devices with hot air. Please read this manual before operating Serial Number W S1001 And Above CONTENTS REV-A 753020 All rights reserved. No part of this book shall be reproduced by any means; electronic, photocopying, All Rights Reserved All Rights Reserved The connectors furnishing high current to the KPA3 module Reprinted with permission from Electronics Now Magazine September 1997 issue The high-voltage Class B devices have a Federal Communications Total solder points: 383 Difficulty level: beginner 1 2 3 4 5 advanced K8081 ILLUSTRATED ASSEMBLY MANUAL H8081IP-1 Caution Make sure you are properly grounded with an ESD strap before continuing. The main printed Intel NUC Kit DC3217IYE American Megatrends, Inc. 5555 Oakbrook Parkway, Building 200 IMI WILSHIRE, INC. COUNTER INTELLIGENCE BEVERAGE SYSTEM CI8100 INSTALLATION AND SERVICE MANUAL 1993 IMI Wilshire, Inc. TABLE OF CONTENTS CI8100 IMI Wilshire, Inc.Copyright 1994 Elenco Electronics, Inc. Revised 2001 REV-C 753253 INTRODUCTION Are you planning to install User s Guide Owner s Manual The following notes Safety Operation Maintenance Upgrading and Servicing Guide Hewlett-Packard Company makes no warranty of any kind with regard to ILLUSTRATED ASSEMBLY MANUAL H8065IP-1 VELLEMAN NV Legen Heirweg 33 9890 Gavere Belgium Europe www.velleman.be Amplifier Installation and Setup Guide. AVoIP The motor is driven by a circuit mounted near the motor and Products: D90D7, D90DW. Issue: 121312 PN: 883884-35L Rev. A A Copyright Notices 2012, Wyse Technology Inc. All rights reserved. This manual and Skokie, Illinois 60076 U.S.A. tel: 1 847 673-5006 fax: 1 847 Two Channel High Performance Power Amplifier. Four Channel High Performance Power Amplifier DOD-STD 1868, DOD-HDBK-263 Specifications for Model This UPS utilizes voltages that may be hazardous. Do not attempt to disassemble the unit. The unit contains no user replaceable parts. You have bought a great, innovative product from DAP Audio. The DAP Audio Microphone range brings excitement to any venue.Installation Instructions To use this website, you must agree to our Privacy Policy, including cookie policy. Picture of actual manual. Very good used Condition. May have technician notes written inside. Manual is from our family TV and radio repair shop that closed in the early 90's. Stored in a climate controlled warehouse in filing cabinets for over 20 years. Tracked USPS Media mail Shipment. I ship fast and pack with care. Please contact me with any questions. Thanks and Happy Bidding!!! AS-IS. Very good used Condition. Climate Controlled Warehouse Stored For Over The Last 20 Years.You are the light of the world. Learn more - opens in a new window or tab This amount is subject to change until you make payment. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab This amount is subject to change until you make payment. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. For additional information, see the Global Shipping Programme terms and conditions - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Learn More - opens in a new window or tab Contact the seller - opens in a new window or tab and request post to your location. Please enter a valid postcode. Please enter a number less than or equal to 1. Sellers may be required to accept returns for items that are not as described. Learn more about your rights as a buyer. - opens in a new window or tab You're covered by the eBay Money Back Guarantee if you receive an item that is not as described in the listing. All Rights Reserved. Search results for: (found: ) ask for a document File Date Descr Size Popular Mfg Model: Found in chassis2model: Found in repair tips. Electrostatic Discharge Sensitive (ESDS) Device Handling. 4Figure 1. 1600VI and 1800VI Block Diagram. 9. Theory of Operation. 10-18. 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. 57It is collected for only two reasons: Administrative purposes, should a need to contact you arise. To inform you of new comments, should you subscribe to receive notifications. A cookie may be set on your computer. This is used to remember your inputs. It will expire by itself. This policy is subject to change at any time and without notice.By submitting a comment, you are declaring that you agree with these rules: Although the administrator will attempt to moderate comments, it is impossible for every comment to have been moderated at any given time. You acknowledge that all comments express the views and opinions of the original author and not those of the administrator. You agree not to post any material which is knowingly false, obscene, hateful, threatening, harassing or invasive of a person's privacy. The administrator has the right to edit, move or remove any comment for any reason and without notice. Failure to comply with these rules may result in being banned from further commenting. The lightning flash with ar rowhead symbol, within an equilateral triangle, is intended to aler t the user to the presence of uninsulated dangerous voltage within the system enclosure that may be of sufficient magnitude to constitute a risk of electric shock. The exclamation point within an equilateral triangle, as marked on the system, is intended to alert the user to the presence of important operating and maintenance instr uctions in this owner’ s guide. Information about products that generate electrical noise If applicable, this equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to pr ovide reasonable pr otection against harmful interfer ence in a residential installation. This equip- ment generates, uses, and can radiate radio fr equency ener gy and, if not installed and used in accordance with the instructions, may cause har mful interference to radio communica- tions. However, this is no guarantee that interference will not occur in a particular installa- tion.Estas marcas de A TENCION estan situadas en la parte posterior del amplificador de potencia estereo pr ofesional Modelo 1800-VI o 1600-VI. El simbolo de relampago dentr o de un triangulo equilater o indica al usuario que en el interior de la carcasa del sistema existen tensiones peligr osas no aisladas de intensidad suficiente como para repr esentar un riesgo de sufrir una descar ga electrica. El signo de admiracion dentro de un triangulo equilater o, como el que apar ece marcado en el sistema, indica que en la guia del usuario se ofr ecen instrucciones de manejo y mantenimiento importantes PELIGRO DE DESCARGA ELECTRICA NO ABRIR ATENCION: PARA REDUCIR EL RIESGO DE SUFRIR UNA DESCARGA ELECTRICA, NO RETIRE LA CUBIERTA (NI LA TAPA TRASERA).I simboli di A VVER TIMENTO qui riprodotti rappr esentano i simboli che si tr ovano sul pannello posteriore degli amplificatori di potenza ster eo pr ofessionale Modello 1800-VI e Modello 1600-VI.Il punto esclamativo all’interno di un triangolo equilatero, come pr esente sul sistema, avverte l’utente dell’esistenza di importanti istruzioni d’uso e di manutenzione contenute in questo manuale. Italiano PRECAUCION A TTENZIONE Deze waarschuwingssymbolen bevinden zich op de achterkant van de Model 1800-VI en 1600-VI professionele ster eo vermogensversterker.Het uitroepteken in een gelijkzijdige driehoek, zoals op het apparaat gebruikt, dient om de gebruiker erop attent te maken dat deze gebruiksaanwijzing belangrijke instructies voor bediening en onderhoud bevat. LET OP Keep the original carton and packing materials for possible future use. Check for any visible signs of damage. If the amplifier appears damaged, do not try to use it. Notify the Bose Product Support or your authorized Bose Pr ofessional Pr od- ucts dealer. 3.0 The Bose Model 1800-VI and 1600-VI Pr ofessional Stereo Power Amplifiers The Bose Model 1800-VI and 1600-VI Professional Ster eo Power Amplifiers ar e specially designed for professional sound applications. Their rugged construction and low pr ofile allow each amplifier to sustain the abuses of the road with r eliability and space-saving economy. Also, their accurate sound and ample power make these amplifiers ideal for critical studio applications. The 1800-VI amplifier is rated at 600 watts per channel into 4 ohms and 450 watts per channel into 8 ohms. In bridged mono operation, it is rated at 1400 watts into 8 ohms. The 1600-VI amplifier is rated at 325 watts per channel into 4 ohms and 240 watts per channel into 8 ohms. In bridged mono operation, it is rated at 700 watts into 8 ohms. The sophisticated protection cir cuits designed into each amplifier will pr otect your system from unexpected faults. They also pr otect each amplifier fr om excessive temperature, continuous current limiting, and shorted outputs. The balanced inputs of each amplifier use a high quality, high common-mode rejection differ ential amplifier for exceptional hum and noise rejection. In addition, both the 1800-VI and the 1600-VI amplifiers are equipped with an input boar d that allows differ ent equalization for each channel (pr ovided the correct equalization car d is installed). A sample setup might involve one Model 1800-VI amplifier driving two channels of 802 loudspeakers in stereo mode. A second Model 1800-VI could be added to drive a 502B module. Alternatively, just one amplifier could be used to drive the 802 loudspeakers on one channel and the 502B module on the other channel. Many configurations ar e possible using the four loudspeakers above. This flexibility can be achieved by installing the EQ car ds for the desired setup. 2.0 Before Y ou Begin Do not pull by the cord; grasp the plug firmly. Contact an authorized dealer or service center. Place the unit where it will be pr otected fr om heat and allow adequate ventilation. Place it away from dir ect heat sources, such as heating vents and radiators. Use four scr ews with washers to pr event marring the front panel. Neo- pr ene rubber washers are a good choice because they grip the scr ew head and prevent the screws fr om backing out in the event of vibration or if the unit is transported. 4.2.1 Rear support for road applications If either unit is rack-mounted and the rack is transported, you must mechanically support the rear of the amplifier.