[TechAssist] Re: Toshiba TP55G65,TAC 9754, HV comes on for split second, need SM.

From: "Corey Brazell" <cohbraz@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Date: Tue, 12 Apr 2005 21:17:59 -0400
Does it still stay running with the convergence yokes disconnected? If so, I 
still believe that you have a defective STK output. I am not sure about that 
model, but the newer Toshiba sets have one STK to control the Horizontal 
convergence, and the other STK controls the Vertical. If this is designed 
the same way, it is possible that your set will still run with the green 
conv yoke disconnected: If one channel of one STK controls the green horiz 
conv, and is defective, and you swap the STKs, it is possible that the 
defective STK now controls the green vert conv, thus explaining why it still 
behaves the same way with the green conv yoke connected/disconnected. Just 
my theory.

I still say the STKs! I just did one today, one tomorrow, one two weeks ago, 
etc. etc.

Believe me, those STKs will fail and fail often. If not, then you have two 
options: Either a defective convergence yoke (super extremely rare), or a 
defective Digital Convergence Unit which is driving a DC voltage to the STKs 
(only seen it once).

Corey Brazell
Audio Video Electronics
12169 SC Hwy 121
Newberry SC 29108


----- Original Message -----
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, April 12, 2005 6:30 PM
Subject: [TechAssist] Re: Toshiba TP55G65,TAC 9754, HV comes on for split 
second, need SM.


>I just swapped the convergence IC's with no change, which leads me to
> believe that they are fine.  But, I don't have the schematic to confirm
> that swapping them is a good test to see if they are bad or not .
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Corey Brazell -
> Audio Video Electronics
> Sent: Tuesday, April 12, 2005 2:34 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Toshiba TP55G65,TAC 9754, HV comes on for
> split second, need SM.
>
> That proves 100% that you have a bad STK convergence output IC!
>
> Corey Brazell
> Audio Video Electronics
> 12169 SC Hwy 121
> Newberry SC 29108
> ----- Original Message ----- 
> From: "Kevin" <kevintv@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, April 12, 2005 5:13 PM
> Subject: [TechAssist] Re: Toshiba TP55G65,TAC 9754, HV comes on for
> split
> second, need SM.
>
>
>>I pulled the convergence yoke plugs one at a time and the set comes on
>> and stays on with the green convergence yoke plug removed.  Does this
>> prove 100% that the green convergence yoke is bad, or do I need to do
>> more testing to confirm this diagnosis?  All the convergence yokes
> rang
>> the same on my Sencore LC75, so I am suspicious that the green
>> convergence yoke is at fault.  Thanks.
>>
>> Kevin Wilks
>> Kevin's TV & Video Repair
>> Penticton BC Canada
>> kevintv@xxxxxxx
>>
>>
>> -----Original Message-----
>> From: techassist-bounce@xxxxxxxxxxxxx
>> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Kevin
>> Sent: Sunday, April 10, 2005 1:55 PM
>> To: TECH-ASSIST
>> Subject: [TechAssist] Toshiba TP55G65,TAC 9754, HV comes on for split
>> second, need SM.
>>
>> This set comes on for a split second and then goes into shutdown with
>> the power light slowly flashing off and on.  I looked in the member's
>> area but could not find this model listed.  Does anyone know what
>> chassis family this set belongs to?  I am guessing it is in the list
> for
>> Toshiba, but not by model number.  Thanks.
>>
>> Kevin Wilks
>> Kevin's TV & Video Repair
>> Penticton BC Canada
>> kevintv@xxxxxxx
>>
>>
>>
>>
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References:
- [TechAssist] Re: Toshiba TP55G65,TAC 9754, HV comes on for split second, need SM.
  - From: Kevin
[TechAssist] Re: Toshiba TP55G65,TAC 9754, HV comes on for split second, need SM.

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