Rob_Beech Posted March 11, 2009 Share Posted March 11, 2009 I'm after someone to give advice and/or repair a MA3600. The 6 pin "opto-isolator" which is U101 on the board fell out of its socket on channel 1. It's been put back into place (the right way around) but the channel remains in protect mode. It's a H11C2 chip but nobody appears to make them anymore. Does anyone know if this is likely to need a replacement, or is there anyone with knowledge of the Macrotech range that could give advice or have a look. I would like advice other than contacting the Crown if possible. The question wouldn't be here if that was the advice I wanted. Cheers Rob Link to comment Share on other sites More sharing options...
Brian Posted March 11, 2009 Share Posted March 11, 2009 It's a H11C2 chip but nobody appears to make them anymore.Yep, obsolete although the NTE3046 is quoted as a drop-in replacement. Link to comment Share on other sites More sharing options...
Rob_Beech Posted March 11, 2009 Author Share Posted March 11, 2009 Cheers Brian, I'll look into that and try and get it sorted. Link to comment Share on other sites More sharing options...
Andy Simmons Posted March 11, 2009 Share Posted March 11, 2009 I'm after someone to give advice and/or repair a MA3600. The 6 pin "opto-isolator" which is U101 on the board fell out of its socket on channel 1. It's been put back into place (the right way around) but the channel remains in protect mode. It's a H11C2 chip but nobody appears to make them anymore. Does anyone know if this is likely to need a replacement, or is there anyone with knowledge of the Macrotech range that could give advice or have a look. I would like advice other than contacting the Crown if possible. The question wouldn't be here if that was the advice I wanted. Cheers Rob Try my mate John Adeleke, very experienced amp repairer:Ampman Audio ServicesUnit 17 C/O Amber Sound Ltd The Enterprise CentreCranborne Road Potters BarHertfordshireEN6 3DQ Telephone:- +44 (0) 1707 246546 Fax :- +44 (0) 1707 246551 Email Enquiries :- info at Ampman.co.uk Link to comment Share on other sites More sharing options...
KevinE Posted March 11, 2009 Share Posted March 11, 2009 On my MA5000VZ diagram it shows the H11C2 (photothyristor) but when I've taken a peek at one here, its actually got the MOC3021 fitted which are opto triac drivers. You really need to speak to Crown. Not Harman UK, but Crown in the US. Ask for Dave Glass, he will know but you'll need your serial number handy. Crown in the US are in my experience the opposite of Harman UK, ie they appear happy to help. Link to comment Share on other sites More sharing options...
Furryface Posted March 12, 2009 Share Posted March 12, 2009 Ask for Dave Glass, he will know but you'll need your serial number handy. First off HArman Uk don't exist any more, distributor is Sound Technolgy. Second Dave Glass is a really lvoely, helpful bloke. Thirdly John Adeleke is also a top guy and should be able to sort you out. Link to comment Share on other sites More sharing options...
Rob_Beech Posted March 12, 2009 Author Share Posted March 12, 2009 There are many reasons why contact the relevant people in THIS country is not on the list of things to do. Thanks for your help guys I'll let you know how things turn out. Link to comment Share on other sites More sharing options...
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