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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Amplifier protector C1237HA
Does anyone have any info on this part UPC1237HA-NEC, or C1237HA ?
I am trying to diagnose a possible fault in the protection circuit of a NAD320 integrated amplifier but I don't know what to make of this IC. Any info gratefully recieved! Graham |
#2
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"GrahamH" Does anyone have any info on this part UPC1237HA-NEC, or C1237HA ? I am trying to diagnose a possible fault in the protection circuit of a NAD320 integrated amplifier but I don't know what to make of this IC. Any info gratefully recieved! ** A pdf data sheet is offered on this page: http://www.datasheetarchive.com/semi...asheet=2197068 Took me a while to track it down, but. ........... Phil |
#3
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Phil Allison wrote...
"GrahamH" Does anyone have any info on this part UPC1237HA-NEC, or C1237HA ? I am trying to diagnose a possible fault in the protection circuit of a NAD320 integrated amplifier but I don't know what to make of this IC. Any info gratefully recieved! ** A pdf data sheet is offered on this page: http://www.datasheetarchive.com/semi...asheet=2197068 Took me a while to track it down, but. DatasheetArchive got that scan from FreeTradeZone. They then added a front-page ad and locked the document, so you can't remove the ad, can't excerpt a page, can't add notes, etc. Pretty low, IMHO. -- Thanks, - Win |
#4
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"Phil Allison" "GrahamH" ** A pdf data sheet is offered on this page: http://www.datasheetarchive.com/semi...asheet=2197068 ** Appears to have defect when I try it. File downloads but will not open. ............ Phil |
#5
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Just tested the file. Works fine. Direct link
(http://www.datasheetarchive.com/ds.pdf) Make sure you save the file locally before opening. Also, our pdfs require adobe acrobat 6.0 or later to load. Best Regards DatasheetArchive.com Admin |
#6
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It would not work with Adobe 4.0 or 5.0, but opened fine for me with 6.0. I
think 7.0 is the latest so it should work too. Bob "Phil Allison" wrote in message ... "Phil Allison" "GrahamH" ** A pdf data sheet is offered on this page: http://www.datasheetarchive.com/semi...asheet=2197068 ** Appears to have defect when I try it. File downloads but will not open. ........... Phil |
#7
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Our datasheets have come from over 2000 sources over the last 11 years.
We record where we get our files from. This datasheet did not come from Partminer. We've had problems in the past with people copying our content. So we decided to brand and secure our documents. Datasheet4u.com is an example. Now that we have our name on the front of each document they dont bother trying to mass download our content anymore. They target Partminer instead now. As a result Partminer datasheets start to circulate around all the datasheet sites. |
#8
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"Phil Allison" wrote in message ... "GrahamH" Does anyone have any info on this part UPC1237HA-NEC, or C1237HA ? I am trying to diagnose a possible fault in the protection circuit of a NAD320 integrated amplifier but I don't know what to make of this IC. Any info gratefully recieved! ** A pdf data sheet is offered on this page: http://www.datasheetarchive.com/semi...asheet=2197068 Took me a while to track it down, but. .......... Phil Thanks Phil, just what I needed. Graham |
#9
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On Fri, 02 Sep 2005 12:22:52 GMT, "GrahamH" put
finger to keyboard and composed: Does anyone have any info on this part UPC1237HA-NEC, or C1237HA ? I am trying to diagnose a possible fault in the protection circuit of a NAD320 integrated amplifier but I don't know what to make of this IC. Any info gratefully recieved! Graham Surprisingly, NEC's website has a datasheet: http://www.necel.com/nesdis/image/IC-1806A.pdf This Japanese app note has a good application circuit: http://www.necel.com/nesdis/image/IEP-730A.pdf -- Franc Zabkar Please remove one 'i' from my address when replying by email. |
#10
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"Franc Zabkar" Surprisingly, NEC's website has a datasheet: http://www.necel.com/nesdis/image/IC-1806A.pdf ** But is NOT available if you type in either UPC1237H or UPC1237HA. .......... Phil |
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