[TechAssist] Re: Toshiba CF32C50, very low audio
- From: peggs <peggs@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
- Date: Tue, 21 Jun 2005 09:06:12 -0700
what about the ground/return of the Speaker itself.
Is the Negative Lead Ground ???
Or does it have some type of return circuit,like say a Yoke would have ????
Peggs
At 04:37 PM 6/20/05, gulftech@xxxxxxxx wrote:
>I am missing something here that is driving me crazy.
>
>I originally thought it was the typical Sony sound module (SBX1637) bad.
>I replaced that a little over three years ago, but put a new one in. No
>change. It uses a TA8200AH audio output. I have audio in and out both
>channels and at the speakers, but only the slightest sound FROM the
>speakers. I subbed the speakers with no improvement. The 470 ufd
>coupling caps are good. Tried a new TA8200. No change. Checked the
>internal/external speakers switch. There is audio present at the audio
>out jacks.
>
>The output stage seems to be working, because the signal is greater on
>the output than the input. The darn thing SHOULD work, but it doesn't!
>I have 27v B+, 5V on the mute, and about 11V on each output pin. No
>print, but I think that is about normal.
>
>If you have a scan of the output stage or the voltages on IC610
>(LA7800AH), it would sure help. Winstips lists QN14 and QA60 as possible
>causes for no audio, but they check good and besides I do have audio
>present at both inputs and outputs.
>
>Had enough fun for today.
>
>TIA,
>
>
>Ken Smith
>Gulf Technical Services
>3034 Gulf Breeze Parkway
>Gulf Breeze, FL 32563
>850-934-8324 (Voice) 850-932-0819 (Fax)
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