[TechAssist] Re: Sony KP-48S65R Shut Down
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 16 Nov 2005 12:13:23 -0500
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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