B&O-Beolab2EN-type-686x-from19367810维修电路原理图.pdf

BeoLab 2 Type 6861, 6862, 6863, 6864, 6865, 6867 From serial no. 19367810 Service Center repair guide English ABO-CENTER v/HENRIKSENS ELEKTRONIK RadioFans.CN 收音机爱 好者资料库 HOW TO SERVICE Big efforts have been made to introduce the highest quality and a low call rate. Therefore this product is suitable for the new Service Strategy which benefi ts the customer. In a service situation where there is an electrical fault in a BeoLab 2, the fault can be removed during one visit to the customers home if you bring a Back- up suitcase with you. If it is a mechanical fault, the particular part can be replaced in the customers home. When the necessary part(s) arrive from service stock, the visit to the customers home can be arranged. Front line service The BeoLab 2 must be serviced in the customers home when dealing with electrical faulty or the exchange of mechanical parts. In this way, you avoid having to transport the heavy subwoofer (18kg) back and forth from the customer (box size: L 310 x W 260 x H 315 mm). In the customers home, it is possible to exchange the driver and slave units, the electrical chassis or transformer, as well as exchange the cabinet and foot. Replacement of the cabinet can be done easily at the customers home as it contains all the necessary parts. Only the loudspeaker units, the electrical chassis and the transformer must be put into the new cabinet. Electrical parts For front line service we offer a Back-up suitcase (also applies to BeoLab 1). All the needed electrical parts are located in the Back-up suitcase (loudspeaker units and electronics). That means the BeoLab 2 Back-up suitcase must be ordered and returned. Service documentation Service documentation for the BeoLab 2 is this guide (with part numbers for the Back-up suitcase and mechanical parts) and the Users Guide. How to service, English 1.1 ABO-CENTER v/HENRIKSENS ELEKTRONIK RadioFans.CN 收音机爱 好者资料库 Specifi cation guidelines for service use 1.9 SPECIFICATION GUIDELINE FOR SERVICE USE BeoLab 2 Type no. See type survey Dimensions W x H x D / Weight 260 x 315 x 310 mm / 17.7 kg Cabinet fi nish Aluminium, structure painted, grey Power Consumption Typical: 15 watts IEC65: 62W Stand-by: 0.4 watts Maximum Sound Pressure Level 110 dB Power amplifi ers 1 Long-term maximum output power 850 watts Effective Frequency range 23 - 120 Hz Cabinet principle Double balanced passive radiator system Magnetically shielded Yes Woofer 1 x 9” (250 mm) fl at diaphragm Passive radiators 2 x 9” (250 mm) fl at diaphragm Net volume 13 litres Bass equalization ABL (Adaptive Bass Linearization) Switch for loudspeaker position Free, Wall or Corner Input sensitivity Adjustable by three position switch Corresponding to 83 dB, 88 dB or 91 dB for main speakers Connections Power Link - Input 1 Power Link - Output 2 Mains 1 Power Link plug Pin 1 Loop through, Power Link plugs Pin 2 Signal GND Pin 3 Audio Left 0V - 2V RMS Pin 4 Power Link speaker ON = 0.5V, OFF = ?A?BC?DE?)?G?0?G? ?)?S.S?P?.7 ?L?)BeoLab 2?TU.?A?BC?DE?) ?G?0?,$?)?HG?de?07 ABO-CENTER v/HENRIKSENS ELEKTRONIK 6.2 DisassemblyDisassembly 6.26.2 DISASSEMBLY 1 34 6 Left 5 Left Front Extra rubber foot from the back-up suitcase Left Left PUSH 2 Right The NTC-PCB must be connected when the chassis is in service position ready for voltage measuring Right 7 9 8 WARNING! The mechanical limit for the driver is easily reached when the vacuum tightness in BeoLab 2 is broken Special bezel-tool STATIC ELECTRICITY MAY DESTROY THE PRODUCT Left Extra rubber foot from the back-up suitcase 10 11 TORX 25TORX 25 TORX 25 TORX 25 TORX 25TORX 25 TORX 25TORX 25 ALLEN KEY 5 ALLEN KEY 5 x2 Disconnect 1 plug for NTC PCB ABO-CENTER v/HENRIKSENS ELEKTRONIK 6.36.36.3 ABO-CENTER v/HENRIKSENS ELEKTRONIK INSULATION TEST BeoLab 2 must be insulation tested if it has been dismantled. Make the test when the BeoLab 2 is reassembled and is ready to be returned to the customer. Insulation test at the Service center Short-circuit the two pins of the mains plug and connect them to one of the terminals of the Insulation tester. Connect the other terminal of the insulation tester to ground on the Power Link socket. To avoid damaging the BeoLab 2, it is essential to ensure that both terminals of the insulation tester have good contact. Slowly turn up the voltage control of the insulation tester until a voltage of 2.5kV(ac) is obtained. Maintain that voltage level for one second, then slowly turn it down again. During the testing the current must not exceed 10mA. Insulation test at the customer Remove the mains cable from the wall outlet. Place a jumper across the two AC plug prongs. Use a multi-meter, set for measurements in the Ohm-area. Place one lead from the multi-meter on the AC plug and place the other lead on ground at the Power Link plug. The resistance during this measurement must be of 1 Mega Ohm or more. Resistance measured below 1 Mega Ohm indicates an abnormal situation and corrective action must be taken. Please note: Avoid all skin contact with the AC plug and all other metal parts while performing the test, as this contact may infl uence the measurement. Insulation test, English 7.1 ABO-CENTER v/HENRIKSENS ELEKTRONIK Bang & Olufsen DK-7600 Struer Denmark Phone +45 96 84 11 22* Fax +45 97 85 39 11 3538051 06-06 ABO-CENTER v/HENRIKSENS ELEKTRONIK