mal421 Posted October 10, 2013 Share Posted October 10, 2013 I have 4 x Bose 802 on my bench at the moment ,they are not mine,the owner of which was informed that all 8 drivers in each box had blown. However all drivers meter OK and all I can find wrong are missing fuses. In one of the boxes the board with the caps on in missing a fuse, can anyone tell me what value of fuse it should be if indeed it is a fuse ? I'm reluctant to remove the same item from another box in case I manage to break it. Link to comment Share on other sites More sharing options...
Brian Posted October 10, 2013 Share Posted October 10, 2013 The datasheet for the mk2 says 4 amp quick acting. [E2A]Are you sure they are fuses? It looks like they ought to be lamps... or even a PTC thermistor... I guess it depends on which version you have. Link to comment Share on other sites More sharing options...
mal421 Posted October 10, 2013 Author Share Posted October 10, 2013 I'm not sure the actual item is missing, probably removed by the person who claimed all the drivers were blown ! All that is on the board is 1 capacitor and a fuse carrier. They are all 802 Series 2. The board in question is loose inside the box, I guess it should be fixed to the baffle like in the other 3 boxes in such a manner that it is difficult to see the item in question. Link to comment Share on other sites More sharing options...
Brian Posted October 10, 2013 Share Posted October 10, 2013 See here. Link to comment Share on other sites More sharing options...
mal421 Posted October 10, 2013 Author Share Posted October 10, 2013 Thankyou for your help Brian. The 4 amp fuse I believe is the one on the back panel between the XLR Skts and that fuse is intact. Looking at your diagrams I am beginning to think I need a light bulb. Peering into another box it appears to be a single bulb/fuse like structure. I looks like I will have to dismantle another unit to find out exactly what I need, something I was hoping to avoid. Once again, thankyou for your help. Link to comment Share on other sites More sharing options...
bruce Posted October 10, 2013 Share Posted October 10, 2013 From memory, it needs a couple of 12V lamps - the "bullet-shaped" ones that you often find in car interior lights. But google doesn't find much info to back this up, so I guess best to dismantle. Link to comment Share on other sites More sharing options...
parky58 Posted October 10, 2013 Share Posted October 10, 2013 From memory, it needs a couple of 12V lamps - the "bullet-shaped" ones that you often find in car interior lights. But google doesn't find much info to back this up, so I guess best to dismantle. That's what I used. They are fed via the capacitor (bipolar) and act as a load to dump unwanted high frequencies from what I remember. Unfortunately , Bose won't supply parts but do offer a repair service for fixed prices. Having spent many hours re-foaming drivers and messing about finding cabinet rattles I won't hesitate using this service in the future. Link to comment Share on other sites More sharing options...
mal421 Posted October 13, 2013 Author Share Posted October 13, 2013 Thanks for all your help. A trip to my loco all car parts shop has sorted things now I have find the real cause of the problem. All 802s are working fine with my controller and amplifiers so it's off to the venue on Monday. Once again thankyou. Link to comment Share on other sites More sharing options...
Brian Posted October 13, 2013 Share Posted October 13, 2013 Great news. For the future reference of people finding this topic....what lamps did you use? Link to comment Share on other sites More sharing options...
mal421 Posted October 13, 2013 Author Share Posted October 13, 2013 I bought 2 x 12v 10w car interior bulbs will go back to the shop and ask exact type and post that in a day or so. Link to comment Share on other sites More sharing options...
GDJ Posted October 13, 2013 Share Posted October 13, 2013 1381680517[/url]' post='484005']I bought 2 x 12v 10w car interior bulbs will go back to the shop and ask exact type and post that in a day or so. Probably a festoon bulb ? http://www.maplin.co.uk/12v-10w-standard-festoon-11x38mm-blue-98592 Link to comment Share on other sites More sharing options...
mal421 Posted October 13, 2013 Author Share Posted October 13, 2013 That's the puppy . Link to comment Share on other sites More sharing options...
djmatthill Posted October 16, 2013 Share Posted October 16, 2013 Hello... Please find a copy of the original Bose 802 MKII Service manual attached. Bose Service Manual I have a few pairs of BOSE 802`s if you need any further info. Matt Link to comment Share on other sites More sharing options...
Brian Posted October 16, 2013 Share Posted October 16, 2013 Please find a copy of the original Bose 802 MKII Service manual attached.Interesting. In there the only protection is a back panel fuse. On the PCB is a PTC used for directivity control. So an 802 mk2 and an 802 series 2 are different designs? Link to comment Share on other sites More sharing options...
mal421 Posted October 18, 2013 Author Share Posted October 18, 2013 I'm currently lighting a show so the Bose problem is on the back burner until next week. Thank you for the service manual. Link to comment Share on other sites More sharing options...
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