BO-Beolab9_type6217-int-sm1 电路图 维修手册.pdf

BeoLab 9 Type 6217 Service Manual English German, French, Italian, Spanish, Danish, Dutch and Japanese versions are available in the Retail System This Service Manual must be returned with the defective parts/back-up suitcase ! RadioFans.CN 收音机爱 好者资料库 CONTENTS Survey of modules . 1.1 How to service . 1.2 Fault flow chart . 2.1 Adjustments . 3.1 Repair tips . 3.2 Final check after repair . 3.3 Replacement of modules . 4.1 Specification guidelines for service use . 5.1 Block diagram . 6.1 Wiring diagram . 6.3 Available parts . 7.1 RadioFans.CN 收音机爱 好者资料库 PCB1CrossOver PCB2LC-Filter PCB3LED PCB4PowerSupply PCB5ICEpowerAmplifier PCB7NTC 999ModuleChassiscomplete,incl.PCB1,PCB2,PCB5 4 999 7 3 Surveyofmodules Survey of modules 1.1 RadioFans.CN 收音机爱 好者资料库 Howtoservice Strategy BeoLab 9 has been split-up into as few service items as possible. Each service- friendly item is packed individually, prepared for worldwide transport, and has a separate seven digit spare part number to be found in the Bang & Olufsen Retail System or the Service Manual. An exploded view drawing shows the service spare parts. The back-up suitcase holds all necessary electrical modules for front-line repair of one loudspeaker in e.g. the customers home. Cabinet parts must be brought with you separately, if to be replaced in the customers home. An adequate fault description must be returned with each replaced part. For this purpose, use the Module Repair form or the form in the Retail Order System under Exchange Module. To help the Bang & Olufsen Module Repair department it is very important to answer the following questions: 1. Which products are in the setup? 2. Which software versions are used in these products? 3. How are the products linked together? 4. What happens in the actual situation? All service repair will be on module level by means of the back-up suitcase. Service Manuals in other languages can be found in the Retail System as PDF-files. Preparationsbeforeservice Always remember to download the latest version of the Service Manual. Fault description must be returned with the replaced parts. Use the Module Repair form or the form in the Retail Order System, Exchange Module. Fault explanation and demonstration Before troubleshooting is initiated, let the customer demonstrate the fault, if possible. Recommended tools for service White gloves. Soft lint-free cloth. Multimeter. 1.2 How to service Handlingandcleaning Static electricity Static electricity may damage the product. Static-protective field service kit. A static-protective field service kit must always be used when the product is disassembled or modules are being handled. Follow the instructions in this Service Manual and use the ESD-mat for both old and new modules. Please note: When mains voltage on the product is required, remove the connection between the product and the ESD-mat. The chassis or modules must always be connected to the static-protective field service kit or placed in an ESD-proof bag. Symbol of safety components When replacing components with this symbol, the same type has to be used, also the same values for ohm and watt. The new component is to be mounted in the same way as the replaced one. Transport and handling It is recommended to: - use the product cover when transporting the product. - do not move the product when it is operating. Cleaning Please refer to the chapter “Final check after repair” or the Users guides. STATICELECTRICITY MAYDESTROYTHE PRODUCT ESD How to service 1.3 1.4 Fault flow chart 2. Fault flow chart No red light in STANDBY . 2.2 No sound, but green LED is OK . 2.4 No sound from woofer, but tweeter and midrange is OK . 2.4 No sound from midrange, but tweeter and woofer is OK . 2.5 No sound from tweeter, but midrange and woofer is OK . 2.5 No function of the PCB7, NTC . 2.6 No function of S and S2 . 2.6 2.2 Fault flow chart Fault symptom: - No red light in STANDBY Possible causes: - Fuse F - PCB4, Power Supply - Module 999, Amplifier Connect a Master Link cable from e.g. a BeoSound 4, to BeoLab 9. Make sure that S0 is set to either L or R. Connect mains to BeoLab 9. Is there red light in the LED on top of BeoLab 9? Reconnect mains Confirm mains on PCB4, Power Supply P3 pin and 2 If possible, check fuse F on PCB, Cross Over Replace fuse F Replace PCB4, Power Supply Confirm 4.2V on PCB, Cross Over P9 pin 2 Replace Module 999, Amplifier Replace PCB3, LED No Yes Confirm 5V on PCB4, Power Supply P4 pin Confirm mains in the mains wire Note: Ground is chassis Fault flow chart 2. Select e.g. Radio or CD on the Audiomaster, and press GO on Beo4 Does BeoLab 9 turn on (Green light in LED) Confirm 5V on PCB4, Power Supply P14 pin 7 Check Power Link cable and Audiomaster. Reconnect/replace if nescessarry. (This is not covered in this fault flow chart) Confirm -12V on PCB4, Power Supply P14 pin Replace PCB4, Power Supply Replace PCB4, Power Supply No Yes Confirm 44V on PCB4, Power Supply P15 pin 4 Replace PCB4, Power Supply Confirm -44V on PCB4, Power Supply P15 pin 5 Go to next page Confirm 12V on PCB4, Power Supply P14 pin 5 Replace PCB4, Power Supply Confirm 66V on PCB4, Power Supply P15 pin 6 Replace PCB4, Power Supply Confirm approx 4.7V on PCB4, Power Supply P14 pin 9 Replace PCB4, Power Supply Replace Module 999, Amplifier 2.4 Fault flow chart Fault symptom: - No sound, but green LED is OK Possible causes: - Module 999, Amplifier Is there no sound, but the green LED is OK? Go to box further down on page Replace Module 999, Amplifier From above No Yes Note: It wil give the best result if it is possible to use an audio test CD with pure sine waves and an oscilloscope, when measuring on the woofer or midrange. Warning: Be very careful, when measuring on the woofer, because there is approx 35Vdc on both input terminals. Make sure to use a differential probe, or make sure that the oscilloscope and the product is not connected to earth. Fault symptom: - No sound from woofer, but tweeter and midrange is OK Possible cause: - Woofer - Module 999, Amplifier Turn volume on the Audio Master up to 50. Confirm an AC-Sound signal by means of the Bar-graph on the multimeter or an oscilloscope, when measuring across the woofer input terminals. From previous page Visual confirm cable connection between woofer and Module 999, Amplifier Reconnect/replace cable Remove mains from the product. Remove the black wire from the woofer. Measure the resistance across the woofer terminals: Approx 2.9 ohm? Replace woofer Replace Module 999, Amplifier Fault flow chart 2.5 Fault symtom: - No sound from midrange, but tweeter and woofer is OK Possible cause: - Midrange - Module 999, Amplifier Turn volume on the Audio Master up to 50. Confirm an AC-Sound signal by means of the Bar-graph on the multimeter or an oscilloscope, when measuring across the midrange input terminals. Note: It wil give the best result if it is possible to use a audio test CD with pure sine waves and an oscilloscope, when measuring on the woofer or midrange Visual confirm cable connection between midrange and Module 999, Amplifier Reconnect/replace cable Remove mains from the product. Remove the black wire from the midrange. Measure the resistance across the midrange terminals: Approx 6. ohm? Replace midrange Replace Module 999, Amplifier Fault symtom: - No sound from tweeter, but midrange and woofer is OK Possible cause: - Tweeter - Module 999, Amplifier Turn volume on the Audio Master up to 50. Confirm an AC-Sound signal by means of the Bar-graph on the multimeter or an oscilloscope, when measuring between PCB, Cross Over P0 pin and ground. Visual confirm cable connection between tweeter and Module 999, Amplifier Reconnect/replace cable Remove mains from the product. Remove the connector on PCB, Cross Over P0. Measure the resistance between the orange and white wire: Approx 6.6 ohm? No Yes Replace tweeter Replace Module 999, Amplifier 2.6 Fault flow chart Fault symptom: - No function of the PCB7, NTC Possible cause: - PCB7, NTC - Cable W4 - Module 999, Amplifier Is the loudspeaker in protection mode? Visual confirm cable connection between Module 999, Amplifier and PCB7, NTC Reconnect/replace cable Replace PCB7, NTC Replace Module 999, Amplifier To confirm correct operation of the NTC, measure approx. 9.35V DC at normal room temperature, as shown in fig (When the temperature is rising, the DC voltage is going towards 0) Note: When the loudspeaker goes into protection mode, it is nescessarry to disconnect mains and wait one minute before connecting it again. Fault symptom: - No function of S and S2 Possible cause: - Module 999, Amplifier Is there no function of switch S and/or S2? Replace Module 999, Amplifier No Yes Fig RedBlack Adjustments Adjustments described Speaker driver adjustment. The speakers are individually measured and the speaker driver must be adjusted accordingly. Adjustment must be performed when either speaker or speaker driver is replaced. Access to adjustment points The adjustment points are placed on the socket panel on the back of the product. Speaker adjustment table Adjustments 3.1 1 2 3 4 5 6 7 8 9 0 + 1 2 3 4 5 6 7 8 9 0 + 1 2 3 4 5 6 7 8 9 0 + TW MR WO TW: Tweeter MR: Midrange WO: Woofer Speaker value from Switch position label on speaker 1.8 2.3 0 1.3 1.7 1 0.8 1.2 2 0.3 0.7 3 -0.2 0.2 4 -0.3 -0.7 5 -0.8 -1.2 6 -1.3 -1.7 7 -1.8 -2.2 8 -2.3 -2.5 9 Power Link MK III Repair tips Hum in speaker when no music is played The Power Link cable must be of type MK III or higher. The ground connection in Power Link cable lower than MK III may be insufficient for optimum sound performance. Standby LED The standby LED indicates the status of the BeoLab 9. Standby LED STATUS Red BeoLab 9 is in standby. Green BeoLab 9 is operating. Orange BeoLab 9 is shut down due to thermal overload. If the LED Status is orange, turn off and disconnect the product from the mains. Wait for minimum 5 minutes for the speaker to cool down. Connect mains and turn on BeoLab 9. If the LED status still is orange the fault may be due to: 1. Woofer protection perform speaker check. 2. Tweeter protection perform speaker check. 3. Midrange protection perform speaker check. 4. NTC-board or connection on one of the woofers. Access the NTC-board by dismantling the woofer. 4. Power supply failure. 3.2 Repair tips Final check after repair Final check after repair The final check after repair describes the activities that are needed to ensure the product will be returned in perfect condition to the customer. The content is: Insulation test. Restore setup. Final cleaning of the product. Insulation test The product must be insulation tested after having been dismantled. Make the test when the set has been reassembled and is ready to be returned to the customer. Flashover must not occur during the test. Make the insulation test as follows: 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 to ground on the Power Link socket. NOTE! To avoid damaging the product it is essential that both terminals of the insulation tester have good contact. During the test the current must not exceed 5 mA. Slowly increase the voltage on the insulation tester until a voltage of 2.5 kV (ac) is obtained. Maintain the voltage level for one second, then slowly decrease the voltage to 0 V (ac). Restore setup Ensure that, The F/W/C switch is in correct position. The plug is inserted over the standby LED. The Power Link cable is a MK III or higher. Check sound Ensure that all speakers are OK. Clean the product Clean dusty surfaces using a dry soft cloth. If necessary, remove grease stains or persistent dirt with a lint-free, firmly wrung cloth, dipped in a solution of water containing only a few drops of mild detergent such as washing-up liquid. The loudspeaker front grill may be cleaned with a vacuum cleaner with a soft brush nozzle, and set to the lowest level. Final check after repair 3.3 3.4 4.Replacement of modules Replacement of modules Modules that can be replaced BeoLab 9 in service position . 4.2 Replace PCB3, LED . 4.4 Replace PCB4, Power Supply . 4.6 Replace 999Module, Amplifier . 4.7 Replace tweeter . 4.9 Replace midrange . 4. Replace woofer . 4.2 Replace rubber foot . 4.3 Warning Static electricity Static electricity may damage the product. A static-protective field service kit must always be used when the product is disassembled or modules are being handled. Notice! All modules must be placed on the ESD-mat or in an ESD-proof bag. Purpose of replacement of modules Short instructions for replacement of the available modules, with reference to additional illustrations: - The correct sequence for replacing modules. - Text and illustrations. - Reference to adjustment. Modules that do not require any special procedure may be shown as only illustrations. After replacement of drivers After replacing a driver, see Adjustments and Repair tips. ESD ESD-Mat 4.2 BeoLab 9 in service position - Remove cables connected to BeoLab 9 - Remove cover 2x 3mm - Remove cover, top - Remove screws for lens - Use Special tool 3x 2.5mm 4.3BeoLab 9 in service position - Gently lift off lens - Pull off fabric frame 4.4 Replace PCB3, LED - Remove cables connected to BeoLab 9 - Remove cover 2x 3mm - Remove cover, top - Remove screws for lens - Use Special tool 3x 2.5mm 4. Replace PCB3, LED 3x TX10 3x TX20 3P25 - Gently lift off lens - Remove screws and pull off PCB3,