[TechAssist] Re: Zenith B25A11ZF Chassis 9-2108 Flat line then off. Won't start.
- From: ACME Enterprises <techassist@xxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 12 Apr 2005 10:43:35 -0400
Sanken's markings on the STR series of regulator ICs is pretty
inconsistant. The "white dot" may or may not be present on the original
part.
One *sure* way to tell if you have the real thing is to look at the
circular indentation immediately above the center lead. If there is an
"SK" stamped into the plastic inside the circle, the device is genuine.
If the circle is empty or missing, you probably have a counterfeit.
It's too expensive for the counterfeiters to reproduce this device at
such a level of detail.
Regards,
Glen Goodwin
ACME Enterprises of Orlando
http://www.acme-sales.net
1-800-575-9833
1-407-296-2333
Tony S wrote:
> Hi warren,
>
> those are more than likely the Chinese knock offs that smoke at powerup, I
> ran into a lot of them about 2 years ago. check for a white dot after the
> STR, if there they are original.
>
> Tony Saracco
> TCS ELECTRONICS
> 406 Andra Ct.
> Gilberts, IL 60136
> tcselectronics@xxxxxxxxx
>
> ----- Original Message -----
> From: "jorge miret" <jorge_miret@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, April 08, 2005 10:16 AM
> Subject: [TechAssist] Re: Zenith B25A11ZF Chassis 9-2108 Flat line then off.
> Won't start.
>
>
>
>>Hello Warren:
>>I just verified with a STR53041 and if checked on diode scale with (+) on
>>pin#2 and (-) on pin# 3, I got reading of a regular diode and if leads are
>>reversed I got infinite or very hi resistance.I hope this help you.
>>Jorge.
>>Warren <warrenca@xxxxxxxxx> wrote:
>>What! is my question about STR53041 a stupid question???
>>I don't know if this short between 2 & 3 means difinitively that it's bad!
>>
>>Warren
>>
>>Warren wrote:
>>
>>
>>>Hi All
>>>
>>>Just got started on this one. Wondering about the STR53041 if it's
>>>good or not?
>>>I have some saved STR53041's but I noticed that some of them have pins
>>>2-3 with a very low ohms.
>>>I would like to hear from others if this indicates a bad chip.!
>>>I need to throw these out if they are bad.
>>>
>>>BTW the customer said that the set flashed then went to a flat line ,
>>>then went out, and wouldn't go again.
>>>At this early point I've only noticed one shorted transistor nearby the
>>>regulator. Number escapes me right now at home.
>>>
>>>TIA
>>>Warren Campbell
>>>Campbell's TV & Appliances
>>>Cannington ONT
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>>
>>Jorge Miret-Puerto Rico
>>J.C.Electronic Repairs
>>Tel:787-761-0920
>>jorge_miret@xxxxxxxxx
>>
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