[TA-A] Re: Zenith PVR5263MK no picture

oh tahts a different chassis than i worked on.... nevermind...



----
Mike



----- Original Message ----- 
From: "Dan E" <tbkdan3@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, January 05, 2008 5:14 PM
Subject: [TA-A] Re: Zenith PVR5263MK no picture


> Hi Mike,
> Thanks for the input.  Between what you suggested and 
> http://www.anatekcorp.com/faq/protv.htm (1/3 of the way down, question 
> P42803-10, same issue on a model that is covered by my service manual), I 
> did locate at least one faulty diode (CRX3412).  Local Radio Shack didn't 
> have anything that was suitable, so I'll have to either locate a 
> specialist or order one online. Anybody know any shops in the Rochester 
> area? :)
>
> I did not find any fuses that had blown anywhere.  I don't have a scope 
> handy so I can't check the HOT (would I be correct in assuming the 
> aforementioned site is correct and it is the QX3200 transistor?).
>
> Again, I am not experienced in TV repair, so if I'm looking in the wrong 
> spots, please let me know :)  If I am looking in the right spots, are 
> there any other components I should check since that diode was definitely 
> bad?
>
> For your convenience, I put two versions of the schematics of the power 
> board on imageshack; I don't suggest viewing them unless you're on a 
> broadband connection.
> http://img169.imageshack.us/img169/558/page2jq3.jpg
> http://img145.imageshack.us/img145/8162/page1nn1.jpg
>
> Thanks again, I really appreciate the help :-)
>
> Dan
>
> Mike Bates <mbates17@xxxxxxxxxxxx> wrote: sounds like the HOT is blown and 
> the supply fuse to the B+ is gone with it.
>
> i had similar PVR chassis do the same thing, it was the HOT, fuse, and
> flyback.
>
> ----
> Mike
>
>
>
> ----- Original Message ----- 
> From: "Dan E"
> To:
> Sent: Friday, January 04, 2008 10:31 PM
> Subject: [TA-A] Zenith PVR5263MK no picture
>
>
>> Hi, I want to start off by saying that I am not experienced in repairing
>> TV's, but I am somewhat knowledgeable in general electronics.  I received
>> this projection TV from a friend, and got the service manual online.  It
>> powers up and audio comes on (I can raise and lower the white noise from
>> the
>> buttons on top), but I don't get any picture at all; the CRT's don't 
>> light
>> up.  The previous TV I worked on had a somewhat more straightforward
>> troubleshooting guide, while this one is somewhat more complex :P  I was
>> just looking for some generic tips of what I might starting looking for 
>> or
>> if someone knows off the bat what is wrong *crosses fingers* :-)  It 
>> might
>> be worth noting that this TV has been repaired before, and it is somewhat
>> obvious by the less-than-pretty wiring jobs on some of the boards.
>>
>>
>> Thanks for any help you may offer, and let me know if I can clarify
>> anything.
>>
>>
>>
>> Dan
>>
>>
>>
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>
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