This set came in with a complaint of no picture. The first time I
tried it except for being in need of a slight Hor. stat and focus
adjustment it came right on. The next time I tried it it had filament
but no HV. Brfore I pull the D board out, does anyone have any
thoughts on this repair? Thanks, Lenny.

About a half dozen possibilities come to mind. The first would be IC8002,
IIRC, the MCZ3001 regulator controller. Also, there are a couple of
resistors and caps that open up that can be problems, bad FBT, drifting in
the HV protect circuit, 9v regulator with bad solder joints, etc.

Do you subscribe to any tips databases or online forums for repair help?
Have you even just googled the problem?

I strongly suggest you join a group like TechAssist or NESDANET or TechData,
and get a tips program like WinsTips. For as little as $50 a year you can
have access to lots more information without having to have someone else
look it up for you.

Leonard

wrote in message
...
This set came in with a complaint of no picture. The first time I
tried it except for being in need of a slight Hor. stat and focus
adjustment it came right on. The next time I tried it it had filament
but no HV. Brfore I pull the D board out, does anyone have any
thoughts on this repair? Thanks, Lenny.

On Feb 16, 1:52*pm, "Leonard Caillouet" wrote:
About a half dozen possibilities come to mind. *The first would be IC8002,
IIRC, the MCZ3001 regulator controller. *Also, there are a couple of
resistors and caps that open up that can be problems, bad FBT, drifting in
the HV protect circuit, 9v regulator with bad solder joints, etc.

Do you subscribe to any tips databases or online forums for repair help?
Have you even just googled the problem?

I strongly suggest you join a group like TechAssist or NESDANET or TechData,
and get a tips program like WinsTips. *For as little as $50 a year you can
have access to lots more information without having to have someone else
look it up for you.

Leonard

wrote in message

...



This set came in with a complaint of no picture. The first time I
tried it except for being in need of a slight Hor. stat and focus
adjustment it came right on. The next time I tried it it had filament
but no HV. Brfore I pull the D board out, does anyone have any
thoughts on this repair? Thanks, Lenny.- Hide quoted text -

- Show quoted text -

I did Google the problem and found that the symptoms I read were
somewhat different than mine. This repair sounds like it could be
involved and as you said without training on this chassis this may be
a job for PTS. Do you feel that the problem is probably confined to
the D board though? Lenny..

wrote in message
...
On Feb 16, 1:52 pm, "Leonard Caillouet" wrote:
About a half dozen possibilities come to mind. The first would be IC8002,
IIRC, the MCZ3001 regulator controller. Also, there are a couple of
resistors and caps that open up that can be problems, bad FBT, drifting in
the HV protect circuit, 9v regulator with bad solder joints, etc.

Do you subscribe to any tips databases or online forums for repair help?
Have you even just googled the problem?

I strongly suggest you join a group like TechAssist or NESDANET or
TechData,
and get a tips program like WinsTips. For as little as $50 a year you can
have access to lots more information without having to have someone else
look it up for you.

Leonard

wrote in message

...



This set came in with a complaint of no picture. The first time I
tried it except for being in need of a slight Hor. stat and focus
adjustment it came right on. The next time I tried it it had filament
but no HV. Brfore I pull the D board out, does anyone have any
thoughts on this repair? Thanks, Lenny.- Hide quoted text -

- Show quoted text -

I did Google the problem and found that the symptoms I read were
somewhat different than mine. This repair sounds like it could be
involved and as you said without training on this chassis this may be
a job for PTS. Do you feel that the problem is probably confined to
the D board though? Lenny..


More than likely, yes. But you need to be more familiar with the circuit
anyway to be sure. I would definitely repair it rather than pay PTS to fix
it. Once you get to know the sony design of this set you can easily fix
lots of other models. If I was working on it I would download the service
manual and training info, along with numerous tips on the model from one of
the sites I listed earlier, then look for help from one of the many other
techs who suscribe to those services and who have lots of experience on
similar sets. Just having access to the tips, archives, and file libraries
usually results in a fix. Once you do the research and can't figure it out,
there are lots of very helpful techs that are willing to help. Much more
serious discussion of repairs goes on on those forums and listserves than
here. Lots of techs do not want to post in public forums like this and
don't want the hassle of all the carping and novices.

Leonard

FYI: A very good tech advice site is at http://wa6ati.com
Monitored and run by professional technicians in many fields of repair and
design, No fee just join up and contribute. Cheers

"Leonard Caillouet" wrote in message
...
wrote in message
...
On Feb 16, 1:52 pm, "Leonard Caillouet" wrote:
About a half dozen possibilities come to mind. The first would be IC8002,
IIRC, the MCZ3001 regulator controller. Also, there are a couple of
resistors and caps that open up that can be problems, bad FBT, drifting
in
the HV protect circuit, 9v regulator with bad solder joints, etc.

Do you subscribe to any tips databases or online forums for repair help?
Have you even just googled the problem?

I strongly suggest you join a group like TechAssist or NESDANET or
TechData,
and get a tips program like WinsTips. For as little as $50 a year you can
have access to lots more information without having to have someone else
look it up for you.

Leonard

wrote in message

...



This set came in with a complaint of no picture. The first time I
tried it except for being in need of a slight Hor. stat and focus
adjustment it came right on. The next time I tried it it had filament
but no HV. Brfore I pull the D board out, does anyone have any
thoughts on this repair? Thanks, Lenny.- Hide quoted text -

- Show quoted text -

I did Google the problem and found that the symptoms I read were
somewhat different than mine. This repair sounds like it could be
involved and as you said without training on this chassis this may be
a job for PTS. Do you feel that the problem is probably confined to
the D board though? Lenny..


More than likely, yes. But you need to be more familiar with the circuit
anyway to be sure. I would definitely repair it rather than pay PTS to
fix it. Once you get to know the sony design of this set you can easily
fix lots of other models. If I was working on it I would download the
service manual and training info, along with numerous tips on the model
from one of the sites I listed earlier, then look for help from one of the
many other techs who suscribe to those services and who have lots of
experience on similar sets. Just having access to the tips, archives,
and file libraries usually results in a fix. Once you do the research and
can't figure it out, there are lots of very helpful techs that are willing
to help. Much more serious discussion of repairs goes on on those forums
and listserves than here. Lots of techs do not want to post in public
forums like this and don't want the hassle of all the carping and novices.

Leonard

On Feb 17, 5:31*am, "Art" wrote:
FYI: A very good tech advice site is athttp://wa6ati.com

Monitored and run by professional technicians in many fields of repair and
design, No fee just join up and contribute. *Cheers
"Leonard Caillouet" wrote in message

...



wrote in message
...
On Feb 16, 1:52 pm, "Leonard Caillouet" wrote:
About a half dozen possibilities come to mind. The first would be IC8002,
IIRC, the MCZ3001 regulator controller. Also, there are a couple of
resistors and caps that open up that can be problems, bad FBT, drifting
in
the HV protect circuit, 9v regulator with bad solder joints, etc.

Do you subscribe to any tips databases or online forums for repair help?
Have you even just googled the problem?

I strongly suggest you join a group like TechAssist or NESDANET or
TechData,
and get a tips program like WinsTips. For as little as $50 a year you can
have access to lots more information without having to have someone else
look it up for you.

Leonard

wrote in message

....

This set came in with a complaint of no picture. The first time I
tried it except for being in need of a slight Hor. stat and focus
adjustment it came right on. The next time I tried it it had filament
but no HV. Brfore I pull the D board out, does anyone have any
thoughts on this repair? Thanks, Lenny.- Hide quoted text -

- Show quoted text -

I did Google the problem and found that the symptoms I read were
somewhat different than mine. This repair sounds like it could be
involved and as you said without training on this chassis this may be
a job for PTS. Do you feel that the problem is probably confined to
the D board though? Lenny..

More than likely, yes. *But you need to be more familiar with the circuit
anyway to be sure. *I would definitely repair it rather than pay PTS to
fix it. *Once you get to know the sony design of this set you can easily
fix lots of other models. *If I was working on it I would download the
service manual and training info, along with numerous tips on the model
from one of the sites I listed earlier, then look for help from one of the
many other techs who suscribe to those services and who have lots of
experience on similar sets. * Just having access to the tips, archives,
and file libraries usually results in a fix. *Once you do the research and
can't figure it out, there are lots of very helpful techs that are willing
to help. *Much more serious discussion of repairs goes on on those forums
and listserves than here. *Lots of techs do not want to post in public
forums like this and don't want the hassle of all the carping and novices.

Leonard- Hide quoted text -

- Show quoted text -

Very good advice from all levels. Thanks for the help. Lenny