[TA-A] Re: Zenith PVR5263MK no picture

well that means the HOT is shorted. you will have to replace the supply 
fuse/diode to that HOT possibly.

and the flyback. i repaired a PVR4663 that had the same issue.

only way to know is to replace the hot, and leave the HV lead disconnected 
to the HV splitter and if it powers up with HV, then you know its the 
splitter, if it shorts the HOT again, its the fly.

----
Mike


----- Original Message ----- 
From: "Dan E" <tbkdan3@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, January 05, 2008 7:13 PM
Subject: [TA-A] Re: Zenith PVR5263MK no picture


> Well, I took QX3200 off the board and it's shorted on both B-E and B-C 
> :( Since you also mentioned the flyback, is there any way to check if that 
> has gone south as well?  And would the site I mentioned in the previous 
> email be correct in saying the flyback is TX3200?
> Thanks again!
>
> Dan
>
> Mike Bates <mbates17@xxxxxxxxxxxx> wrote: check QX3200 for a shorted state 
> though. B to E will alwasy read shorted.
> but check B to C.. if shorted, there is your main issue..
>
> ----
> Mike
>
>
> ----- Original Message ----- 
> From: "Dan E"
> To:
> 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  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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>
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