Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default Sony KV-XS29M33

Can anyone please help me out with the above TV set. The set is dead with
no pic or audio. On powering up there are 2 flashes from the LED indicating
a short somewhere in one of the power crts. I suspect the main power
regulating IC601 has gone to heaven but am not 100% sure. Does any one out
there have any experience with these sets? Are there likely to be any other
components that need to be replaced at the same time (I think the cap C614
(10uf 50) and diode D610 may also be suspect). I am more used to working
with audio equipment than TV so any help would be most appreciated.
Regards
Con244

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Default Sony KV-XS29M33


I have not worked on this particular model. I will make a generic
comment:

I have had failures of the flyback assembly including the HV
multiplier. In most Sony sets the flyback and HV multiplier are
manufactured as a single module.

If the flyback is defective, most likely the horizontal output
transistor must be replaced. With that, there may be damage in the
main power supply. The main drive IC usually fails when these types of
faults occure.

Also, it is important to verify if any of the support components in
the power supply and the horizontal output area have also failed.
Sometimes a small component fails in these areas, and thus other
components fail because of this. If the original cause of the failure
is not verified the new replacement components will also fail.

After finding all the faults and the set is working, it is important
to verify the high voltage and X-Ray protection specifications. You
must refer to the service manual for details.

If you are not experienced and trained in TV servicing you may not be
able to properly service these types of problems.


Jerry G.


__


On Dec 12, 12:56*am, "Con244" wrote:
Can anyone please help me out *with the above TV set. The set is dead with
no pic or audio. On powering up there are 2 flashes from the LED indicating
a short somewhere in one of the power crts. I suspect the main power
regulating IC601 has gone to heaven but am not 100% sure. Does any one out
there have any experience with these sets? Are there likely to be any other
components that need to be replaced at the same time (I think the cap C614
(10uf 50) and diode D610 may also be suspect). I am more used to working
with audio equipment than TV so any help would be most appreciated.
Regards
Con244


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Default Sony KV-XS29M33

Thx Jerry, I think you may be right, it's time for a TV service tech to get
involved. Thx for taking the time to answer
Regards
Con244
"Jerry G." wrote in message
...

I have not worked on this particular model. I will make a generic
comment:

I have had failures of the flyback assembly including the HV
multiplier. In most Sony sets the flyback and HV multiplier are
manufactured as a single module.

If the flyback is defective, most likely the horizontal output
transistor must be replaced. With that, there may be damage in the
main power supply. The main drive IC usually fails when these types of
faults occure.

Also, it is important to verify if any of the support components in
the power supply and the horizontal output area have also failed.
Sometimes a small component fails in these areas, and thus other
components fail because of this. If the original cause of the failure
is not verified the new replacement components will also fail.

After finding all the faults and the set is working, it is important
to verify the high voltage and X-Ray protection specifications. You
must refer to the service manual for details.

If you are not experienced and trained in TV servicing you may not be
able to properly service these types of problems.


Jerry G.


__


On Dec 12, 12:56 am, "Con244" wrote:
Can anyone please help me out with the above TV set. The set is dead with
no pic or audio. On powering up there are 2 flashes from the LED
indicating
a short somewhere in one of the power crts. I suspect the main power
regulating IC601 has gone to heaven but am not 100% sure. Does any one out
there have any experience with these sets? Are there likely to be any
other
components that need to be replaced at the same time (I think the cap C614
(10uf 50) and diode D610 may also be suspect). I am more used to working
with audio equipment than TV so any help would be most appreciated.
Regards
Con244


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