Bose AWRC-1P
in [Repair]
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From: Boobtube on 27 Oct 2009 19:48 I have an old Bose AWRC-1P radio/cd player that has no audio at the output. There is audio at the line outs. it seems that the voltage at pin 7 of the output chip--TDA7375A is going below the threshold voltage and forcing the chip into mute/standby mode. I have no schematic for this thing and Bose is very reluctant to offer any assistance that doesn't require forking over hundreds of dollars. I did try replacing the output chip and it was working but then when I would turn it off, it would take longer and longer to come on each time I turned it on again. Now I can turn it on and wait for hours. It may come on but lately it hasn't. Any clues as to where to look or does anyone know of an available schematic? ------------------------------------- ##-----------------------------------------------## Delivered via http://www.electrondepot.com/ Electronics Enthusiasts' Community of the Net Web and RSS access to your favorite newsgroup - sci.electronics.repair - 22688 messages and counting! ##-----------------------------------------------##
From: Arfa Daily on 27 Oct 2009 21:08 "Boobtube" <kvatter_at_yahoo_dot_com(a)foo.com> wrote in message news:4ded2$4ae786d0$43de0cc0$27076(a)news.flashnewsgroups.com... > > I have an old Bose AWRC-1P radio/cd player that has no audio at the > output. There is audio at the line outs. it seems that the voltage at > pin 7 of the output chip--TDA7375A is going below the threshold voltage > and forcing the chip into mute/standby mode. I have no schematic for this > thing and Bose is very reluctant to offer any assistance that doesn't > require forking over hundreds of dollars. I did try replacing the output > chip and it was working but then when I would turn it off, it would take > longer and longer to come on each time I turned it on again. Now I can > turn it on and wait for hours. It may come on but lately it hasn't. Any > clues as to where to look or does anyone know of an available schematic? > Mail me off-group with a valid address that you know can receive an attachment of several MB, and I will send you a copy of the service manual, which has a very good circuit description that should allow you to troubleshoot the problem. Arfa
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