Akai PT4298HD lens problem?

Archived from groups: alt.tv.tech.hdtv,sci.electronics.repair (More info?)

If its a Plasma set you will have to call for
service there is zip you can do yourself.
If its a regular pro set change the convergence IC,s

kip



"Svilen Stoicheff" <svilen@yahoo.com> wrote in message
news:4cSdnZ2dnZ1iSM3GnZ2dnVOwaN-dnZ2dRVn-yZ2dnZ0@comcast.com...
>I have a 42" Akai projection TV, model PT4298HD. I turned it on today and
>saw that the picture appeared misaligned -- the red color displays in an
>out-of-sync, non-horizontal shape. See these pictures:
> http://stoicheff.dynu.com/images/43600195.JPG
> http://stoicheff.dynu.com/images/43600196.JPG
> I've tinkered with computers, but I'm new to projection TVs. Any pointer
> in the right direction will be highly appreciated.
> Thanks.
> Svilen

Archived from groups: alt.tv.tech.hdtv,sci.electronics.repair (More info?)

Art wrote:
> Two conditions will affect this, first is leaking crt onto the deflection
> board, very common with Samsung, Akai RPTV CRT SETS. Second in failure in
> the convergence dynamic output circuit or the fluid has also gotten to the
> signal circuit contaminating the DCU assembly. In depth diagnostics required
> to assure that there is no coolant fluid leakage, and if there is, what is
> damaged. BTW the crts come with the yokes attached. When changing any of
> them for leakage order the crt circuit boards (complete 3 card assembly with
> focus assembly) also. What a nice design!!

I should have mentioned that the TV in question is a projection TV.

> "kip" <nospam@nospam.com> wrote in message
> news:newscache$8omtki$906$1@newsfeed.niagara.com...
>
>>If its a Plasma set you will have to call for
>>service there is zip you can do yourself.
>>If its a regular pro set change the convergence IC,s
>>
>>kip
>>
>>
>>
>>"Svilen Stoicheff" <svilen@yahoo.com> wrote in message
>>news:4cSdnZ2dnZ1iSM3GnZ2dnVOwaN-dnZ2dRVn-yZ2dnZ0@comcast.com...
>>
>>>I have a 42" Akai projection TV, model PT4298HD. I turned it on today and
>>>saw that the picture appeared misaligned -- the red color displays in an
>>>out-of-sync, non-horizontal shape. See these pictures:
>>>http://stoicheff.dynu.com/images/43600195.JPG
>>>http://stoicheff.dynu.com/images/43600196.JPG
>>>I've tinkered with computers, but I'm new to projection TVs. Any pointer
>>>in the right direction will be highly appreciated.
>>>Thanks.
>>>Svilen
>>
>>
>
>

Archived from groups: alt.tv.tech.hdtv,sci.electronics.repair (More info?)

Art wrote:
> As Mentioned, nothing that the average consumer can address themselves, have
> it serviced. BTW you will not want to handle any of the internal components
> if indeed there is coolant leakage!!

Understood. Thanks for the input. You are right, it should be serviced
by a qualified technician -- I just wanted to do due diligence and
verify I'm not missing something trivial. For all I can say, it's
probably a convergence board issue -- convergence is way off, and it
doesn't get any better when I try to adjust it manually.
Here's what it looks like:
http://stoicheff.dynu.com/images/A [...] icture.jpg
http://stoicheff.dynu.com/images/A [...] rgence.jpg
http://stoicheff.dynu.com/images/A [...] rgence.jpg


> "Svilen Stoicheff" <svilen@yahoo.com> wrote in message
> news:ItOdnVTc2oUcEWjfRVn-hg@comcast.com...
>
>>Art wrote:
>>
>>>Two conditions will affect this, first is leaking crt onto the deflection
>>>board, very common with Samsung, Akai RPTV CRT SETS. Second in failure in
>>>the convergence dynamic output circuit or the fluid has also gotten to
>>>the signal circuit contaminating the DCU assembly. In depth diagnostics
>>>required to assure that there is no coolant fluid leakage, and if there
>>>is, what is damaged. BTW the crts come with the yokes attached. When
>>>changing any of them for leakage order the crt circuit boards (complete 3
>>>card assembly with focus assembly) also. What a nice design!!
>>
>>I should have mentioned that the TV in question is a projection TV.
>>
>>
>>>"kip" <nospam@nospam.com> wrote in message
>>>news:newscache$8omtki$906$1@newsfeed.niagara.com...
>>>
>>>
>>>>If its a Plasma set you will have to call for
>>>>service there is zip you can do yourself.
>>>>If its a regular pro set change the convergence IC,s
>>>>
>>>>kip
>>>>
>>>>
>>>>
>>>>"Svilen Stoicheff" <svilen@yahoo.com> wrote in message
>>>>news:4cSdnZ2dnZ1iSM3GnZ2dnVOwaN-dnZ2dRVn-yZ2dnZ0@comcast.com...
>>>>
>>>>
>>>>>I have a 42" Akai projection TV, model PT4298HD. I turned it on today
>>>>>and saw that the picture appeared misaligned -- the red color displays
>>>>>in an out-of-sync, non-horizontal shape. See these pictures:
>>>>>http://stoicheff.dynu.com/images/43600195.JPG
>>>>>http://stoicheff.dynu.com/images/43600196.JPG
>>>>>I've tinkered with computers, but I'm new to projection TVs. Any pointer
>>>>>in the right direction will be highly appreciated.
>>>>>Thanks.
>>>>>Svilen
>>>>
>>>>
>

Archived from groups: alt.tv.tech.hdtv (More info?)

Krisma wrote:
> I'm considering a similar Akai set, actualy I was going to post to see if
> people had problems with them.
>
> How long have you had your set? Did you buy a protection plan, if so, is
> this type of repair covered???
>
I've had it for two years, and it's been great so far. No, I didn't buy
a protection plan, I never do.

> "Svilen Stoicheff" <svilen@yahoo.com> wrote in message
> news:WsmdnZpm_KN3zGvfRVn-gA@comcast.com...
>
>>Art wrote:
>>
>>>As Mentioned, nothing that the average consumer can address themselves,
>>>have it serviced. BTW you will not want to handle any of the internal
>>>components if indeed there is coolant leakage!!
>>
>>Understood. Thanks for the input. You are right, it should be serviced by
>>a qualified technician -- I just wanted to do due diligence and verify I'm
>>not missing something trivial. For all I can say, it's probably a
>>convergence board issue -- convergence is way off, and it doesn't get any
>>better when I try to adjust it manually.
>>Here's what it looks like:
>>http://stoicheff.dynu.com/images/AkaiPT4298HD/distortedPicture.jpg
>>http://stoicheff.dynu.com/images/AkaiPT4298HD/blueConvergence.jpg
>>http://stoicheff.dynu.com/images/AkaiPT4298HD/redConvergence.jpg
>>
>>
>>
>>>"Svilen Stoicheff" <svilen@yahoo.com> wrote in message
>>>news:ItOdnVTc2oUcEWjfRVn-hg@comcast.com...
>>>
>>>
>>>>Art wrote:
>>>>
>>>>
>>>>>Two conditions will affect this, first is leaking crt onto the
>>>>>deflection board, very common with Samsung, Akai RPTV CRT SETS. Second
>>>>>in failure in the convergence dynamic output circuit or the fluid has
>>>>>also gotten to the signal circuit contaminating the DCU assembly. In
>>>>>depth diagnostics required to assure that there is no coolant fluid
>>>>>leakage, and if there is, what is damaged. BTW the crts come with the
>>>>>yokes attached. When changing any of them for leakage order the crt
>>>>>circuit boards (complete 3 card assembly with focus assembly) also. What
>>>>>a nice design!!
>>>>
>>>>I should have mentioned that the TV in question is a projection TV.
>>>>
>>>>
>>>>
>>>>>"kip" <nospam@nospam.com> wrote in message
>>>>>news:newscache$8omtki$906$1@newsfeed.niagara.com...
>>>>>
>>>>>
>>>>>
>>>>>>If its a Plasma set you will have to call for
>>>>>>service there is zip you can do yourself.
>>>>>>If its a regular pro set change the convergence IC,s
>>>>>>
>>>>>>kip
>>>>>>
>>>>>>
>>>>>>
>>>>>>"Svilen Stoicheff" <svilen@yahoo.com> wrote in message
>>>>>>news:4cSdnZ2dnZ1iSM3GnZ2dnVOwaN-dnZ2dRVn-yZ2dnZ0@comcast.com...
>>>>>>
>>>>>>
>>>>>>
>>>>>>>I have a 42" Akai projection TV, model PT4298HD. I turned it on today
>>>>>>>and saw that the picture appeared misaligned -- the red color displays
>>>>>>>in an out-of-sync, non-horizontal shape. See these pictures:
>>>>>>>http://stoicheff.dynu.com/images/43600195.JPG
>>>>>>>http://stoicheff.dynu.com/images/43600196.JPG
>>>>>>>I've tinkered with computers, but I'm new to projection TVs. Any
>>>>>>>pointer in the right direction will be highly appreciated.
>>>>>>>Thanks.
>>>>>>>Svilen
>>>>>>
>>>>>>
>
>