Harman-Kardon-ServiceNews_01-2004-Article 电路图 维修手册.pdf

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1、Hello, once again, from the Service Bench. Im Andy Andersen, your Technical Support Specialist. I am here to help you with any repair issues that you may have with our products. Please feel free to contact me at any time at for troubleshooting assistance and information. Whats New! I am pleased to a

2、nnounce that Harman Consumer Group has begun offering web based training sessions for some of our more complex product technologies in the near future. The training is in the form of a 1-hour party line training session in which you can interact with Andy directly to ask questions and offer comments

3、 regarding the topic being discussed. If you are interested in attending the training sessions or if you have particular topics that you would like to be offered in a training session, then please email me at . The first training session that we are currently offering covers the BASH amplifiers used

4、 in the Interlude Series subwoofers. Technical Bulletins of Note We have one new service bulletin to talk about in this edition. It addresses issues with the laser pick-up assembly in the DVD25. There is a new pick-up mechanism for use with this unit. Should you need to replace the laser pick-up for

5、 models between the serial number range of WA0002-01000 and WA0002-10677, use H/K part number KIT710 (mechanism assembly), H/K part number WLD6.672.710R500 (kit of ribbon cables, hardware and cushions), and H/K part number WLD6.672.853C-6 (replacement connector PC board). DVD25 models of serial numb

6、er WA0002- 10678 and higher will already have the modification. If the laser pick-up of these units needs to be replaced, then H/K part number WLD5.018.011XX is all that is needed. Detailed instructions regarding the replacement of the new mechanism assembly are detailed in the Harman Kardon service

7、 bulletin number H/K2003- 06. You can find this bulletin, and all service information directly from the Harman Service website at . Tech Tips of Note Many subwoofer designs available today utilize BASH amplifiers. If you are working on a BASH subwoofer amplifier that is exhibiting low distortion or

8、Hum, then you may want to check out the +/- 15 Volt OP amp supply. If there is more than +/- 0.7 Volts variance, then this could be the cause. If you are working on an AVR receiver with the symptom of shutting down seconds after power-up, then check the amp boards at the Bias Transistor. An oval hol

9、e is cut into the PC board for the three leads to pass through. Check to see that the board is not cracked adjacent to the hole, causing tinned leads to break. This has been noted with the AVR65 receiver but could also apply to other models that may have the same oval hole stamped on the amp board.

10、I Am Here to Help! If you need assistance in troubleshooting a repair problem, please do not hesitate to contact me. When calling me at 1-516-682-6435 or emailing me at , please be sure to have the model number, the serial number and your service center number ready. This will help to expedite the p

11、reliminary requirements and get down to the business of the repair. When leaving a message for me, please leave your name, telephone number, service center name and number and a brief message regarding the problem. I will contact you back as soon as possible. When troubleshooting a product, it is im

12、portant to know what parts of the circuit are functioning properly. Use the block diagrams supplied in the service manuals to determine exactly what is working. This will help you to clearly identify the l ocation of the problem. It will also reduce your bench time with any product. Harman Service N

13、ews Issue 1 2004A newsletter for the HCG service center network 250 Crossways Park Drive, Woodbury, NY 11797 516.496.3400 Repair Bench by Andy Andersen RadioFans.CN 收音机爱 好者资料库 One of the advantages of having a large service network is the ability to gain knowledge from our collective strength. With

14、that in mind, we continue our “Service Tip of the Month” column. David Gilbert, the senior technician at ABL Electronics in Madison Heights, Michigan, wrote in about an issue regarding distorted audio found with an AVR310 receiver. He found resistor R482, a 10 ohm 2 watt resistor at the input of Q48

15、2 had opened. This was caused by C123, a surface mounted capacitor located on the DSP board, which had shorted. Thanks for the tip, David. As always, we welcome any troubleshooting or repair tips that our service centers can provide. And were willing to reward the best contributor by publishing the

16、tip and giving the author a pair of our highly acclaimed Infinity Outrigger Jr. outdoor speakers. David, the speakers are on their way to you! Do you have a smart fix for a difficult repair? Please e-mail it to . Who knows, we may use your tip in our next newsletter! Hello, once again from the Parts

17、 Department! As always, it is a pleasure to help you with your parts orders, and we will continue to do our best to provide fast and efficient service to streamline your parts orders. When checking the price and availability of a part, please note that the “Search for a part” field on will not show

18、you if the part has been substituted until it is added to your shopping cart. When quoting a customer a price, please use the “Check the price and availability of a part” field to ensure that you receive the most current pricing of the part that will ship to you. Are you having trouble finding a par

19、t? Now you can search for a part by model number using the Search for a Part field, in the Purchasing section of the home- page on . This field allows you to enter a partial part number and will return a list of parts that contain the sequence of numbers that you have entered. Try entering just the

20、first few digits of a part number the next time you are having trouble finding a part. CORRECTION: 1.800.645.7484 is no longer in service. Please contact the Parts Department at 1.516.496.3400 ext. 6553 or at . Hello from the Warranty Department! We are here to help you with any warranty information

21、 or warranty claim questions you may have. Our email address is HCGNS. Please feel free to contact us at any time if you have any questions concerning warranty claims. Service Questionnaire As you know, a questionnaire was sent out which asked for information about the test/repair equipment in your

22、shop and the methods that you use to test and repair our products. Thanks to all that have completed this and returned it to us. The information will be helpful in identifying the particular strengths of our authorized service centers. It will also play a part in our plans to introduce a group of se

23、rvice centers that will be identified as “Harman Premier Service Centers.” Any of our service centers will be welcome to apply to be a Premier Service Center and will be required to meet specific qualifications and equipment needs. We will be sending out information in the near future to all service

24、 centers via e-mail regarding this program. Issue 1 2004A newsletter for the HCG service center network Page 2 Service Tip of the Month by Andy Andersen Parts Counter by Jennifer Velazquez Warranty Desk by Harold Kevelos RadioFans.CN 收音机爱 好者资料库 Service Center Survey Our customer submitted Service Ce

25、nter Survey is live! As of the end of September, we have received over 300 survey results from consumers rating their experience with you, our service centers. All are welcome to view the results of this survey directly at . Please keep in mind that some of you may not see survey results for your fa

26、cilities yet. This is not an error. It simply means that we have not yet received customer surveys for your business. Return Authorizations Under special circumstances, we may authorize an exchange of a unit if a repair cannot be completed when the product is out of warranty. Please remember that th

27、ese Return Authorizations do not negate service charges the customer would normally be required to pay for out-of-warranty products, unless pre-arranged by Harman Consumer Group. A Service Authorization is required for any exceptions. If a product is exchanged and still within warranty, then a warra

28、nty claim may be submitted to Service Bench. If a reasonable effort was made to repair the product, you will be reimbursed for all applied parts and half the standard labor rate, but no less than $15.00 for labor. HCG Service Policy Please note that you can view the Harman Consumer Group Service Pol

29、icy at the Service Desk section of . The document contains expected standards and policies regarding Parts, Service, and Warranty, and could help clarify certain issues with regards to authorizations and payments. Invalid Model/Serial Number Its important to make sure that the model number is listed

30、 correctly on every warranty claim. Slight variations in a model version could cause problems with submitting your claim. For example, if you submit a warranty claim for a JBL S312 Series II, the model number should be S312II. Another example is the JBL DVD600 or DVD600II. Using the wrong version fo

31、r the model number will result in an Invalid Serial Number error. The most common cause for an Invalid Model Number error is the wrong manufacturer selected on the claim. Before you change the model to correct this problem, make sure that you have selected the correct manufacturer and always make su

32、re you copy the serial number exactly as it appears on the unit. Please keep these potential errors in mind. It could certainly save a bit of time in the long run. Issue 1 2004A newsletter for the HCG service center network Page 3 Repair Questions & Service T Parts I Warranty/Claim Questions Important E-Mail Addresses RadioFans.CN 收音机爱 好者资料库