[TechAssist] Re: Sony KP53V75 RA-2A - audio pops and convergence focus and color change for instant
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 23 Sep 2005 11:17:15 -0400
The flybacks are a common failure on these but don't forget the high voltage
block itself.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
----- Original Message -----
From: "Tony S" <tcselectronics@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, September 23, 2005 9:50 AM
Subject: [TechAssist] Sony KP53V75 RA-2A - audio pops and convergence focus
and color change for instant
Hi guys ,
I have this Sony that has a strange problem. every now and then the set will
make a loud pop noise and this pop effects the focus, convergence and
basically wipes the video leaving just raster then pix goes back to normal
and cycle repeats at next pop. I have disconnected the tubes one by one but
can still hear the pop (both hv lead and crt socket) I have removed the 200v
source feed to the tubes and have removed the focus lead to the focus block
but pop noise still heard. Checking voltages with a peak meter I found the
biggest voltage drop on the G2 line , drops to 51v when nothing connected.
and the B+ line goes from .4a current draw to 1.2 - 1.4 amp draw for an
instant. My guess is the flyback but wondering if anyone had this happen to
them.
thanks for any input
Tony Saracco
TCS ELECTRONICS
406 Andra Ct.
Gilberts, IL 60136
tcselectronics@xxxxxxxxx
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