[TechAssist] Re: Toshiba CF32C50, very low audio
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 21 Jun 2005 10:44:04 -0400
almost every post or fix finder says the SBX module. One email reference
was:
"tips I've seen on the CF32's with audio problems say to check the
> voltage regulator.
> -Clint"
HTH
Phil Bader
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
peggs wrote:
>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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