[TechAssist] Re: Toshiba Model cx2950c chassis 8820 Dead
- From: Alvin Rose <ajroseca@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 22 Aug 2003 19:00:26 -0700
Thanks for the help from all of the Techs..Your advice
and help was very accurate and appreciated.
Radio & Tv Centre
Marystown, Nfld.
Alvin Rose...Tech
teltek3 wrote:
>Good to know....
>Now...do we deserve a "Signature File"? ;-)
>
>-Ed-
>Tel-Tek Electronics
>Ontario-Canada
>teltek3@xxxxxxxxxxxx
>----- Original Message -----
>From: "Alvin Rose" <ajroseca@xxxxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Friday, August 22, 2003 8:49 PM
>Subject: [TechAssist] Re: Toshiba Model cx2950c chassis 8820 Dead
>
>
>
>
>>Hi ED
>>The problem was a leaky D840 which tested ok..
>>I replaced it and it is running ok now..It is a fast recovery diode
>>NTE-552 which was provided by one of the Techs..I had a lot
>>of help on this one from the list...Thanks Guys your help has been
>>appreciated.
>>Alvin
>>Teltek3 wrote:
>>
>>
>>
>>>I think I mentioned this before. When you chnged the Regulator, did you
>>>
>>>
>put
>
>
>>>it inthe right way, some non-OEM regulators have the legs formed the
>>>
>>>
>wrong
>
>
>>>way.
>>> I have been a Toshiba ASC for years, and this circuit gave no other
>>>problems after changing the components mentioned. I would suggest you
>>>backtrack on the replacements you have done.
>>>
>>>-Ed-
>>>Ed Gaidies
>>>Tel-Tek Electronics
>>>Ontario-Canada
>>>teltek3@xxxxxxxxxxxx
>>>----- Original Message -----
>>>From: "Alvin Rose" <ajroseca@xxxxxxxxxxxxxxx>
>>>To: <techassist@xxxxxxxxxxxxx>
>>>Sent: Thursday, August 21, 2003 3:08 PM
>>>Subject: [TechAssist] Re: Toshiba Model cx2950c chassis 8820 Dead
>>>
>>>
>>>
>>>
>>>
>>>
>>>>Hi Jeff
>>>>the capacitors replaced were high ESR ..C841 blew out again after I
>>>>replaced
>>>>Q801 and Q802..replaced it with a 160 volt rating but it gets hot after
>>>>a short
>>>>time..Set comes on but is in on the sides..Is the rectifier D840 fast
>>>>switching
>>>>or regular diode Do you have the voltage rating of the zener D841
>>>>thanks
>>>>Alvin
>>>>Intrepid Video Support wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Alvin,
>>>>>This sounds like the same set I am working on.
>>>>>Were those capacitors you replaced high ESR?
>>>>>Also...check the two diodes side bng
>>>>>Intrepid Video TV/VCR
>>>>>263 S Front St
>>>>>Steelton PA 17113
>>>>>fax...717-564-4952
>>>>>www.intrepid-video.com www.tech-repair.net
>>>>>
>>>>>----- Original Message -----
>>>>>From: "Alvin Rose" <ajroseca@xxxxxxxxxxxxxxx>
>>>>>To: <techassist@xxxxxxxxxxxxx>
>>>>>Sent: Wednesday, August 20, 2003 7:42 PM
>>>>>Subject: [TechAssist] Re: Toshiba Model cx2950c chassis 8820 Dead
>>>>>
>>>>>
>>>>>Hi Ed
>>>>>c822 was changed with a 100 Mfd 50 volt electrolytic and r820 checks ok
>>>>>at 68 ohms ...Is there anything else that can cause this problem..I
>>>>>
>>>>>
>have
>
>
>>>>>
>>>>>
>>>no
>>>
>>>
>>>
>>>
>>>>>schematic for this one...Will replace c841 with a higher voltage unit
>>>>>A.R
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>-Ed-
>>>>>>Tel-Tek Electronics
>>>>>>Ontario-Canada
>>>>>>teltek3@xxxxxxxxxxxx
>>>>>>----- Originaere anything l Message -----
>>>>>>From: "Alvin Rose" <ajroseca@xxxxxxxxxxxxxxx>
>>>>>>To: <techassist@xxxxxxxxxxxxx>
>>>>>>Sent: Wednesday, August 20, 2003 6:13 PM
>>>>>>Subject: [TechAssist] Toshiba Model cx2950c chassis 8820 Dead
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>Hi Guys
>>>>>>>
>>>>>>>We have a toshiba CX2958c chassis 8820 which was dead
>>>>>>>replaced c863 and c866 also c841... Replaced voltage
>>>>>>>regulators Q801 and Q802 set came on but after a few
>>>>>>>seconds blew the case off C841 again..Any help on this
>>>>>>>unit would be appreciated ... also value of C841
>>>>>>>Alvin Rose
>>>>>>>Radio & Tv Centre
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>*************************************************************************
>>>>
>>>>
>*
>
>
>>>>>
>>>>>
>>>**
>>>
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>>>
>>>
>>>>>>*
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>>>>>>
>>>>>>
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>>>>>>
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