Sony projection model KP-51WS500 convergence question

[captainvideo462002@yahoo.]

I need to make a house call for what sounds like a typical convergence
problem. Customer says the center of the screen looks OK problem is
mostly around the perimeter. The job is about 50 miles from the shop
though so I would really appreciate if anyone knows exactly which
convergence IC's are used in this model and also if there there are
any service notes on convergence failures with this set as well.
Thanks for any assistance. Lenny.

 

[Franc Zabkar]

On Fri, 22 May 2009 11:02:54 -0700 (PDT),
"captainvideo462002@yahoo.com" <captainvideo462002@yahoo.com> put
finger to keyboard and composed:

I need to make a house call for what sounds like a typical convergence
problem. Customer says the center of the screen looks OK problem is
mostly around the perimeter. The job is about 50 miles from the shop
though so I would really appreciate if anyone knows exactly which
convergence IC's are used in this model and also if there there are
any service notes on convergence failures with this set as well.
Thanks for any assistance. Lenny.

There is an 11 part service manual here:
http://www.eserviceinfo.com/downloadsm/20634/SONY_KP-51WS500.html

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

 

[Mark Zacharias]

<captainvideo462002@yahoo.com> wrote in message
news:82627cd3-7169-4204-bce2-ef869e26c5eb@n19g2000vba.googlegroups.com...

I need to make a house call for what sounds like a typical convergence
problem. Customer says the center of the screen looks OK problem is
mostly around the perimeter. The job is about 50 miles from the shop
though so I would really appreciate if anyone knows exactly which
convergence IC's are used in this model and also if there there are
any service notes on convergence failures with this set as well.
Thanks for any assistance. Lenny.

99 % sure it uses the STK 392-560 convergence IC's.

Be a good adea to take along a couple picofuses as well, 5A as I recall.
There are some Sony models which get a bad picofuse on a separate power
supply board when the convergence amps fail, in addition to the picofuses
hiding under the STK's heatsinks, of which 1 or 2 could be bad.

Mark Z.

 

On May 23, 5:44 am, "Mark Zacharias" <mark_zachar...@labolgcbs.net>
wrote:

captainvideo462...@yahoo.com> wrote in message

news:82627cd3-7169-4204-bce2-ef869e26c5eb@n19g2000vba.googlegroups.com...

I need to make a house call for what sounds like a typical convergence
problem. Customer says the center of the screen looks OK problem is
mostly around the perimeter. The job is about 50 miles from the shop
though so I would really appreciate if anyone knows exactly which
convergence IC's are used in this model and also if there there are
any service notes on convergence failures with this set as well.
Thanks for any assistance. Lenny.

99 % sure it uses the STK 392-560 convergence IC's.

Be a good adea to take along a couple picofuses as well, 5A as I recall.
There are some Sony models which get a bad picofuse on a separate power
supply board when the convergence amps fail, in addition to the picofuses
hiding under the STK's heatsinks, of which 1 or 2 could be bad.

Mark Z.

Do you guys recall if on this chassis the convergence board is a
separate small board like on some of the Mitsu's and Samsungs that I
can easily unplug and work on on the kitchen table if I have to? Lenny

 

[Mark Zacharias]

<captainvideo462002@yahoo.com> wrote in message
news:35e6f858-e851-4e97-ac89-372f0e4731c8@s12g2000yqi.googlegroups.com...
On May 23, 5:44 am, "Mark Zacharias" <mark_zachar...@labolgcbs.net>
wrote:

captainvideo462...@yahoo.com> wrote in message

news:82627cd3-7169-4204-bce2-ef869e26c5eb@n19g2000vba.googlegroups.com...

I need to make a house call for what sounds like a typical convergence
problem. Customer says the center of the screen looks OK problem is
mostly around the perimeter. The job is about 50 miles from the shop
though so I would really appreciate if anyone knows exactly which
convergence IC's are used in this model and also if there there are
any service notes on convergence failures with this set as well.
Thanks for any assistance. Lenny.

99 % sure it uses the STK 392-560 convergence IC's.

Be a good adea to take along a couple picofuses as well, 5A as I recall.
There are some Sony models which get a bad picofuse on a separate power
supply board when the convergence amps fail, in addition to the picofuses
hiding under the STK's heatsinks, of which 1 or 2 could be bad.

Mark Z.

Do you guys recall if on this chassis the convergence board is a
separate small board like on some of the Mitsu's and Samsungs that I
can easily unplug and work on on the kitchen table if I have to? Lenny

As I recall, the convergence ass'y is about 11 x 14 inches.

Mark Z.

 

On May 23, 11:30 pm, "Mark Zacharias" <mark_zachar...@labolgcbs.net>
wrote:

captainvideo462...@yahoo.com> wrote in message

news:35e6f858-e851-4e97-ac89-372f0e4731c8@s12g2000yqi.googlegroups.com...
On May 23, 5:44 am, "Mark Zacharias" <mark_zachar...@labolgcbs.net
wrote:





captainvideo462...@yahoo.com> wrote in message

news:82627cd3-7169-4204-bce2-ef869e26c5eb@n19g2000vba.googlegroups.com....

I need to make a house call for what sounds like a typical convergence
problem. Customer says the center of the screen looks OK problem is
mostly around the perimeter. The job is about 50 miles from the shop
though so I would really appreciate if anyone knows exactly which
convergence IC's are used in this model and also if there there are
any service notes on convergence failures with this set as well.
Thanks for any assistance. Lenny.

99 % sure it uses the STK 392-560 convergence IC's.

Be a good adea to take along a couple picofuses as well, 5A as I recall..
There are some Sony models which get a bad picofuse on a separate power
supply board when the convergence amps fail, in addition to the picofuses
hiding under the STK's heatsinks, of which 1 or 2 could be bad.

Mark Z.
Do you guys recall if on this chassis the convergence board is a
separate small board like on some of the Mitsu's and Samsungs that I
can easily unplug and work on on the kitchen table if I have to? Lenny

As I recall, the convergence ass'y is about 11 x 14 inches.

Mark Z.- Hide quoted text -

- Show quoted text -

Sounds like a board in a plastic frame held by small screws around
the perimiter. If so it should come out from the top. Shouldn't be too
bad. Thanks, Lenny.

 

[varocketry]

Do you guys recall if on this chassis the convergence board is a
separate small board like on some of the Mitsu's and Samsungs that I
can easily unplug and work on on the kitchen table if I have to? Lenny

No it's a large board.
Check out numerous articles and discussion on TECHLORE.com discussing
just these SONY convergence issues and that STK IC.

Finding and checking the PIC FUSES on this D Board and G Board appears
to be key from the discussions.