[TechAssist] Re: Toshiba CF3054J, TAC8950 still vert lin troublesafter C301 & C305 repl.]
- From: Ed Gaidies <teltek2@xxxxxxxxxxxx>
- To: TechAssist <techassist@xxxxxxxxxxxxx>
- Date: Mon, 09 Sep 2002 19:36:56 -0400
Normally these run reasonably warm.....I would let it run 2 or 3 hours, if
it OK, should be alright. Normally C308 is the cause for this IC
overheating.
-Ed-
Phil Bader The above is the reply to your message dated 9/9/02 4:36 PM
>
> I repl. C301,305,308,and a few others for measure while troubleshooting.
> The picture is linear and adjusts full. The Vert. output ICheat sink is
> very warm ( I can hold my finger on it for several seconds before
> uncomfortable), but I believe these do run as such. I can replace this
> AN5521 vert output IC for safety sake, but seems OK.
> Thoughts?
> Phil Bader
>
> Ed Gaidies wrote:
>>
>> Phil......
>> Always....always.......C308......220ufd/35volts.
>> Due to the fact that these 2.2ufd/35 volts are timing capacitors.....should
>> never use higher than 50 volts.....discharge time is too great with a
>> 250volt cap. I have never tried to go higher for that reason,,,although you
>> may be lucky.
>> BTW...you may have to change the vertical O/P IC too.
>>
>> -Ed-
>> Tel-Tek Electronics
>> Midland, Ontario
>> Canada.
>>
>> teltek2@xxxxxxxxxxxx
>> teltek3@xxxxxxxxxxxx
>> teltek@xxxxxxx
>>
>> "Quality will be remembered....long after Price is forgotten"
>>
>> Phil Bader The above is the reply to your message dated 9/9/02 2:33 PM
>>
>>>
>>>
>>>
>>> 31" Toshiba TV CF3054J: Orig. symptom was very narrow vert. deflection
>>> and fold over.
>>> ESR'd C301 and C305, both 2.2/50V red electrolytics.Both very high,
>>> almost infinate ESR. Replaced both with 2.2/250v @105 deg. (all I had).
>>> Increased vert. heigth but still narrow by 4 inches top and bottom with
>>> a top fold over. These two caps always do it. I measured the caps before
>>> install and are exactly 2.2 mfd. What else am I overlooking here?
>>> Phil Bader
>>
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