[TechAssist] Re: Sony TV KV24FV10, no start- just chirping
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 25 Jun 2004 09:56:13 -0400
See the following:
SYMPTOMS: Unit will shut down immediately after turn on. But the unit will
stay on if the service mode is entered..
RESOLUTION: When monitoring the VP at IC001(18) only 1 volt peak to peak was
measured.
Floating IC001(18) allowed the voltage to return to 5 volt PP.
Replacing the IC001 corrected the trouble.
SYMPTOMS: Shuts down- two blinks (OCP)
CAUSE: Un-soldered collector of the Hor output and TV shut down with 4
blinks. (no Vertical.)
RESOLUTION: Un-soldered collector of the Hor output and TV shut down with 4
blinks. (no Vertical.)
Replaced FBT T505
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
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "peggs" <peggs@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>
Sent: Friday, June 25, 2004 11:47 AM
Subject: [TechAssist] Re: Sony TV KV24FV10, no start- just chirping
> 39v on the HOT shouldn't be right.
> Either it's being pulled down(HV,Pix Tube,yoke,secondary Rectifiers)
> or it can't handle a load(Power Supply)
>
> Peggs
>
> At 12:25 PM 6/24/04, Gary McCartney wrote:
> >I have a Sony 24" KV24FV10 flat CRT set in the shop. The set doesn't
> >start up. It just chirps continuously. On the odd occasion, the sound
> >will come on for maybe 3 seconds then the power simply turns off. The
> >waveforms on the HOT base and collctor are also pulsing but don't look
> >proper. I get 39V dc on the HOT collector as it pulses.
> >
> >I have removed the flyback and tested it with my HR Diemen flyback
> >tester and I get a perfect looking collector waveform with it. Tester
> >shows flyback to be working fine (those not familiar, this tester
> >actually connects the anode lead and drives the flyback just like the TV
> >hor. output stage, although at a reduced test rate. I haven't had this
> >tester fail me yet). I have also soldered the hor. driver transformer
> >and other connections on main board and power supply board. Have checked
> >for bad transistors diodes and resistors as well. I downloaded the
> >manual and am looking it over now.
> >
> >Are there any common faults for these symptoms? I've read that the
> >flyback is a possibility but with my test, I'm not sure what to make of
> >that.
> >
> >Thanks for any help.
> >--
> >
> >
> >
> >
> >Gary McCartney
> >
> >McCartney Electronics
> >Guelph Ontario Canada
> >Est. 1984
> >email: gary (at) number63.ca
> >
> >
>
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