[TechAssist] Re: Fw: KV36FS100 shorted h out trans, now jagged hor. lines-arcing noise

  • From: Al L <alleathe@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Tue, 19 Jul 2005 17:32:01 -0400

Thanks Gary, will try!

Al Leatherman
224 RT. 46
Mine Hill, NJ 07803
973-361-5796
WWW.ALS-TV.NET

----- Original Message ----- 
From: "Gary McCartney" <gary@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, July 19, 2005 5:00 PM
Subject: [TechAssist] Re: Fw: KV36FS100 shorted h out trans, now jagged hor. 
lines-arcing noise


> Al, I did a Sony repair a while back with symptoms a little bit like you
> may be describing. Not sure if this will help but posting it just in case:
>
>
> This Sony TV model KV24FV10 wouldn't start. Flyback was bad so I
> replaced it with an HR-Diemen # 8774 because it was half the price of a
> Sony original. Set fired up and worked but after a while I noticed some
> pulling in from the bottom right side of the picture, maybe 1/2 inch or
> so. I thought, great I just wasted my money on a sub-standard flyback.
> Put cross-hatch test pattern on screen and ran it for a while. Saw that
> the pull-in was random, sometimes near the bottom of the picture,
> sometimes  closer to half way up  on both sides of the screen, sometimes
> at the top, etc. It would sometimes flicker good to bad.
>
> Tried freeze spray on the chassis. Found that spraying D562, the +13V
> rectifier off the flyback, the symptom would settle down. I replaced the
>  original diode (RGP15G, rated 1.5A, 400V, 150nS) with an EGP30D (rated
> 3A, 200V, 35nS). Now the pulling-in of the picture would occur at the
> top of the screen only. After finishing off a can of freeze spray, I
> finally remembered that there were some surface mount parts on the
> solder side of the board. Found that spraying IC521, (Vertical control
> Hold) would again settle the picture. This IC is an 8 pin surface mount
> IC, Sony # 8-759-700-07, number on part is 2903 JRC (actual #
> NJM2903M-TEZ, same as an LM2903M). Replaced the IC and now picture is
> very stable. Flyback seems to be holding up fine.
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
>
>
>
>
>
>
>
>
> Al L wrote:
>> Sent: Tuesday, July 19, 2005 4:15 PM
>> Subject: KV36FS100 shorted h out trans, now jagged hor. lines-arcing 
>> noise
>>
>>
>>
>>>Put in high quality output,scanning lines ragged at left of pix(severe
>>>hafc hunting but not pie crusting),with my stethoscope i can hear arcing
>>>from fly(I think).I suspect trippler in fly.Set is not drawing heavy
>>>current,and new h out trans is cool,pix is excellent.Any ideas or should 
>>>i
>>>tell him two weeks before i get back,and order a fly?
>>>
>>>Al Leatherman
>>>224 RT. 46
>>>Mine Hill, NJ 07803
>>>973-361-5796
>>>WWW.ALS-TV.NET
>>>
>>
>>
>>
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