[TechAssist] Re: Toshiba Model cx2950c chassis 8820 Dead
- From: Alvin Rose <ajroseca@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 22 Aug 2003 17:49:21 -0700
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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