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Sony KV27FS100 vertical deflection issue (top half is dark)    
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5.0rick



Joined: 26 Jul 2009
Posts: 7
Location: Round Rock Texas

PostPosted: Sun Jul 26, 2009 2:12 pm    Post subject: Sony KV27FS100 vertical deflection issue (top half is dark) Reply with quote

Hello,

I have a Sony KV27FS100 that has a horizontal line in the middle of the screen and the top half does not display anything (compressed in the line).

I have read a few posts on various sites indicating that I have a faulty electrolytic capacitor in the vertical deflection circuit. Can someone please point me in the right direction? I have visually inspected all of the capacitors and none of them show any obvious leakage or damage. Could the problem be something else? An IC?

Thanks,

Rick
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JTS1957



Joined: 21 Jan 2009
Posts: 2395
Location: Far, Far Away

PostPosted: Sun Jul 26, 2009 7:39 pm    Post subject: Reply with quote

If its a capacitor, most likely is C565.
If NOT that try the following "something else" (in no particular order): C561; C564; C539; C537; R536; R537; D530; D531 & IC561 solder Joints/IC.
5.0rick



Joined: 26 Jul 2009
Posts: 7
Location: Round Rock Texas

PostPosted: Mon Jul 27, 2009 8:28 pm    Post subject: Reply with quote

JTS1957 wrote:
If its a capacitor, most likely is C565.
If NOT that try the following "something else" (in no particular order): C561; C564; C539; C537; R536; R537; D530; D531 & IC561 solder Joints/IC.


Thanks for the info. I will give those parts a try and let you know how it goes.

Regards,
Rick
5.0rick



Joined: 26 Jul 2009
Posts: 7
Location: Round Rock Texas

PostPosted: Sat Aug 01, 2009 5:48 pm    Post subject: Reply with quote

Hi JTS1957

No go on C565 or the other components. Any idea what else it may be? Should I try to replace the TDA8172?

Thanks,

Rick
JTS1957



Joined: 21 Jan 2009
Posts: 2395
Location: Far, Far Away

PostPosted: Sun Aug 02, 2009 6:17 am    Post subject: Reply with quote

Presuming the following checks out, replace it.
IC561
Pin # | DC Volts
1) 1.5Volts
2) 12Volts
3) -12Volts
4) -15Volts
5) .3Volts
6) 14.2Volts
7) 1.4Volts

Most important are VCC at Pins 2 & 4.
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5.0rick



Joined: 26 Jul 2009
Posts: 7
Location: Round Rock Texas

PostPosted: Tue Aug 11, 2009 10:15 pm    Post subject: Reply with quote

Hi JTS1957,

I want to thank you for your help. I got a new TDA8172 in the mail today, replaced it and voila! The Sony is fixed. Thanks again for your guidance and assistance.

Regards,

Rick
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