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sly110
Joined: 06 Mar 2009
Posts: 2
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 Posted: Fri Mar 06, 2009 3:23 pm Post subject: Sony Kv-32V35 dead power supply |
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Hi,
I'm having trouble with a Sony KV-32V35 power supply.
It has the G power supply board and R607 was open with Q601, Q602 shorted. I replaced these components and passively tested resistors, caps and semi around them - OK. However, when I reinstalled in TV, the same components immediately failed the same way.
I've read some posts that I need to check Q501 and Q502 and resolder T501. I have not been able to do this yet (my brothers TV at his house). However, my question is the repair kits and posts I see include a 6.8ohm resistor that they recommend replacing. I cant find this resistor anywhere on the schematics. Does anyone know where this is?
Any other advice?
Thanks in advance
sly110 |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Fri Mar 06, 2009 11:14 pm Post subject: |
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| T501 develops bad solder connections causing the B+ to spike blowing R607, Q601/602 and shorting the horizontal output Q501. What took them back out is Q501. The 6.8 ohm is for another set. |
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fwilliams
Joined: 02 Apr 2007
Posts: 5
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| Posted: Wed Mar 11, 2009 6:33 pm Post subject: Re: Sony Kv-32V35 dead power supply |
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there is also a little blue ceramic cap that is shorted . right next to the transister. | sly110 wrote: | Hi,
I'm having trouble with a Sony KV-32V35 power supply.
It has the G power supply board and R607 was open with Q601, Q602 shorted. I replaced these components and passively tested resistors, caps and semi around them - OK. However, when I reinstalled in TV, the same components immediately failed the same way.
I've read some posts that I need to check Q501 and Q502 and resolder T501. I have not been able to do this yet (my brothers TV at his house). However, my question is the repair kits and posts I see include a 6.8ohm resistor that they recommend replacing. I cant find this resistor anywhere on the schematics. Does anyone know where this is?
Any other advice?
Thanks in advance
sly110 | |
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minnie
Joined: 18 Aug 2005
Posts: 2880
Location: Hell
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| Posted: Thu Mar 12, 2009 2:56 am Post subject: |
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| It should be Q502 on a heat sink next to the flyback, the h out, the blue cap that's shorted, component location? |
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sly110
Joined: 06 Mar 2009
Posts: 2
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| Posted: Sat Mar 21, 2009 10:05 pm Post subject: Still having trouble |
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Hi,
I replaced Q502 which was shorted and replaced Q601, Q602, R607 again. I soldered all around T501 and tested Q501. This time I got sound but by the time I got around to the front to see if I had raster, everything shut down again. All my new components were gone again - shorted. When I tried to discharge the anode lead, there was no spark so I'm thinking I never really got HiVolt.
Any additional ideas?
Which little blue cap are we talking about? I checked several around Q502.
Thanks for any help! |
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smithusaf
Guest
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| Posted: Thu Aug 13, 2009 2:07 am Post subject: FREE SONY Trinitro Color TV KV-35V35 |
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| Just come to DC to pick it up, near Crystal City Metro, 3535 S Ball. [email protected]. I'll post the FREE add to craig's list. It's all wrapped up from a military move. I haven't used the TV in over 6 years...it's almost like new. This one's the TV console with a light wood finish (not the black). |
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anyhow
Joined: 28 Jul 2009
Posts: 21
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