[TechAssist] Re: Sony KP-48S65R Shut Down
- From: WWill90634@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 17 Nov 2005 10:29:45 EST
In a message dated 11/16/2005 12:13:52 P.M. Eastern Standard Time,
jstielau@xxxxxxxx writes:
Will,
Whenever you find shorted Horizontal Output shorted...ya gotta ask your
self.....what made this fail?
99% of the time if you pop a new one in with no resolution on why it
failed....it will no doubt fail again.
Typically either 3 things occur.....
1) Too much B+ on the collector
2) Improper drive on the base
3) Excessive load from the flyback or horizontal support circuitry.
One your set , more than likely the flyback is at fault.
Do you have the gear to ring it or drive it with the set not plugged in (
Sencore products)
Make sure you use a quality 2SC5148....not a SK/NTE/ECG replacement
See this tip also......
---------------------------------------------------------------
Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
---------------------------------------------------------------
SONY KP53S65
Dead
Mcgregor TV Service
Q502 Horizontal Output Short 2sc5148
C514 Burnt 100pf To 680 Pf 2/Kv According To Hv
---------------------------------------------------------------
=================================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
(860)399-1861
(860)664-3535 FAX
jstielau@xxxxxxxx
=================================
----- Original Message -----
From: <WWill90634@xxxxxxx>
To: <Techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 16, 2005 10:52 AM
Subject: [TechAssist] Sony KP-48S65R Shut Down
> We have this Sony KP-48S65 in for service. The set was dead, we found the
> Horizontal output transistor shorted and replaced it. The unit fired up
> with a
> tick sound and shorted the HOT again.We checked the blue cap on the
> collector
> and it is ok.
>
> Any suggestion or tips will be appreciated.
> TIA
>
> Will
> Soundview Electronics
>
>
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We don't have service info on this set. The Horizontal output transistor
that was in the set was a 2SD-2348 which we are assuming its the
original,2SD-2348 is what we replaced it with. You mentioned a 2SC-2148. Which
is the
original?
SOUNDVIEW ELECTRONICS
Four Oaks, N.C. 27524
919-963-3160
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