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5.0rick
Joined: 26 Jul 2009
Posts: 7
Location: Round Rock Texas
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 Posted: Sun Jul 26, 2009 2:12 pm Post subject: Sony KV27FS100 vertical deflection issue (top half is dark) |
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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
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| Posted: Sun Jul 26, 2009 7:39 pm Post subject: |
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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. |
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5.0rick
Joined: 26 Jul 2009
Posts: 7
Location: Round Rock Texas
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| Posted: Mon Jul 27, 2009 8:28 pm Post subject: |
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| 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 |
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5.0rick
Joined: 26 Jul 2009
Posts: 7
Location: Round Rock Texas
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| Posted: Sat Aug 01, 2009 5:48 pm Post subject: |
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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 |
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JTS1957
Joined: 21 Jan 2009
Posts: 2395
Location: Far, Far Away
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| Posted: Sun Aug 02, 2009 6:17 am Post subject: |
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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
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| Posted: Tue Aug 11, 2009 10:15 pm Post subject: |
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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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